Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20377:a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
Reviewed-by: jwilhelm, jmasa
| author | tschatzl |
|---|---|
| date | Tue, 26 Aug 2014 09:36:53 +0200 |
| parents | 4d3a43351904 |
| children | 227a9e5e4b4a |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
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25 #if !defined(__clang_major__) && defined(__GNUC__) |
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26 #define ATTRIBUTE_PRINTF(x,y) // FIXME, formats are a mess. |
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27 #endif |
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28 |
| 1972 | 29 #include "precompiled.hpp" |
| 12080 | 30 #include "code/codeCache.hpp" |
| 1972 | 31 #include "code/icBuffer.hpp" |
| 32 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
| 33 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
| 34 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
| 35 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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36 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
| 1972 | 37 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 38 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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39 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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40 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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41 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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42 #include "gc_implementation/g1/g1Log.hpp" |
| 1972 | 43 #include "gc_implementation/g1/g1MarkSweep.hpp" |
| 44 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
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45 #include "gc_implementation/g1/g1ParScanThreadState.inline.hpp" |
| 20337 | 46 #include "gc_implementation/g1/g1RegionToSpaceMapper.hpp" |
| 1972 | 47 #include "gc_implementation/g1/g1RemSet.inline.hpp" |
| 17764 | 48 #include "gc_implementation/g1/g1StringDedup.hpp" |
| 10405 | 49 #include "gc_implementation/g1/g1YCTypes.hpp" |
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50 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 51 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
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52 #include "gc_implementation/g1/heapRegionSet.inline.hpp" |
| 1972 | 53 #include "gc_implementation/g1/vm_operations_g1.hpp" |
| 10405 | 54 #include "gc_implementation/shared/gcHeapSummary.hpp" |
| 55 #include "gc_implementation/shared/gcTimer.hpp" | |
| 56 #include "gc_implementation/shared/gcTrace.hpp" | |
| 57 #include "gc_implementation/shared/gcTraceTime.hpp" | |
| 1972 | 58 #include "gc_implementation/shared/isGCActiveMark.hpp" |
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59 #include "memory/allocation.hpp" |
| 1972 | 60 #include "memory/gcLocker.inline.hpp" |
| 61 #include "memory/generationSpec.hpp" | |
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62 #include "memory/iterator.hpp" |
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63 #include "memory/referenceProcessor.hpp" |
| 1972 | 64 #include "oops/oop.inline.hpp" |
| 65 #include "oops/oop.pcgc.inline.hpp" | |
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66 #include "runtime/orderAccess.inline.hpp" |
| 1972 | 67 #include "runtime/vmThread.hpp" |
| 342 | 68 |
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69 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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70 |
| 342 | 71 // turn it on so that the contents of the young list (scan-only / |
| 72 // to-be-collected) are printed at "strategic" points before / during | |
| 73 // / after the collection --- this is useful for debugging | |
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74 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 75 // CURRENT STATUS |
| 76 // This file is under construction. Search for "FIXME". | |
| 77 | |
| 78 // INVARIANTS/NOTES | |
| 79 // | |
| 80 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 81 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 82 // and allocate_new_tlab, which are the "entry" points to the | |
| 83 // allocation code from the rest of the JVM. (Note that this does not | |
| 84 // apply to TLAB allocation, which is not part of this interface: it | |
| 85 // is done by clients of this interface.) | |
| 342 | 86 |
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87 // Notes on implementation of parallelism in different tasks. |
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88 // |
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89 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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90 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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91 // It does use run_task() which sets _n_workers in the task. |
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92 // G1ParTask executes g1_process_roots() -> |
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93 // SharedHeap::process_roots() which calls eventually to |
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94 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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95 // SequentialSubTasksDone. SharedHeap::process_roots() also |
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96 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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97 // |
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98 |
| 342 | 99 // Local to this file. |
| 100 | |
| 101 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 102 bool _concurrent; | |
| 103 public: | |
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104 RefineCardTableEntryClosure() : _concurrent(true) { } |
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105 |
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106 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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107 bool oops_into_cset = G1CollectedHeap::heap()->g1_rem_set()->refine_card(card_ptr, worker_i, false); |
| 1705 | 108 // This path is executed by the concurrent refine or mutator threads, |
| 109 // concurrently, and so we do not care if card_ptr contains references | |
| 110 // that point into the collection set. | |
| 111 assert(!oops_into_cset, "should be"); | |
| 112 | |
| 20192 | 113 if (_concurrent && SuspendibleThreadSet::should_yield()) { |
| 342 | 114 // Caller will actually yield. |
| 115 return false; | |
| 116 } | |
| 117 // Otherwise, we finished successfully; return true. | |
| 118 return true; | |
| 119 } | |
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120 |
| 342 | 121 void set_concurrent(bool b) { _concurrent = b; } |
| 122 }; | |
| 123 | |
| 124 | |
| 125 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
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126 size_t _num_processed; |
| 342 | 127 CardTableModRefBS* _ctbs; |
| 128 int _histo[256]; | |
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129 |
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130 public: |
| 342 | 131 ClearLoggedCardTableEntryClosure() : |
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132 _num_processed(0), _ctbs(G1CollectedHeap::heap()->g1_barrier_set()) |
| 342 | 133 { |
| 134 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 135 } | |
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136 |
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137 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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138 unsigned char* ujb = (unsigned char*)card_ptr; |
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139 int ind = (int)(*ujb); |
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140 _histo[ind]++; |
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141 |
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142 *card_ptr = (jbyte)CardTableModRefBS::clean_card_val(); |
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143 _num_processed++; |
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144 |
| 342 | 145 return true; |
| 146 } | |
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147 |
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148 size_t num_processed() { return _num_processed; } |
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149 |
| 342 | 150 void print_histo() { |
| 151 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 152 for (int i = 0; i < 256; i++) { | |
| 153 if (_histo[i] != 0) { | |
| 154 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 155 } | |
| 156 } | |
| 157 } | |
| 158 }; | |
| 159 | |
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160 class RedirtyLoggedCardTableEntryClosure : public CardTableEntryClosure { |
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161 private: |
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162 size_t _num_processed; |
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163 |
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164 public: |
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165 RedirtyLoggedCardTableEntryClosure() : CardTableEntryClosure(), _num_processed(0) { } |
| 12343 | 166 |
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167 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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168 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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169 _num_processed++; |
| 342 | 170 return true; |
| 171 } | |
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172 |
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173 size_t num_processed() const { return _num_processed; } |
| 342 | 174 }; |
| 175 | |
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176 YoungList::YoungList(G1CollectedHeap* g1h) : |
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177 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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178 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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179 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 180 } |
| 181 | |
| 182 void YoungList::push_region(HeapRegion *hr) { | |
| 183 assert(!hr->is_young(), "should not already be young"); | |
| 184 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 185 | |
| 186 hr->set_next_young_region(_head); | |
| 187 _head = hr; | |
| 188 | |
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189 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 190 ++_length; |
| 191 } | |
| 192 | |
| 193 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 194 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 195 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 196 | |
| 197 hr->set_next_young_region(_survivor_head); | |
| 198 if (_survivor_head == NULL) { | |
| 545 | 199 _survivor_tail = hr; |
| 342 | 200 } |
| 201 _survivor_head = hr; | |
| 202 ++_survivor_length; | |
| 203 } | |
| 204 | |
| 205 void YoungList::empty_list(HeapRegion* list) { | |
| 206 while (list != NULL) { | |
| 207 HeapRegion* next = list->get_next_young_region(); | |
| 208 list->set_next_young_region(NULL); | |
| 209 list->uninstall_surv_rate_group(); | |
| 210 list->set_not_young(); | |
| 211 list = next; | |
| 212 } | |
| 213 } | |
| 214 | |
| 215 void YoungList::empty_list() { | |
| 216 assert(check_list_well_formed(), "young list should be well formed"); | |
| 217 | |
| 218 empty_list(_head); | |
| 219 _head = NULL; | |
| 220 _length = 0; | |
| 221 | |
| 222 empty_list(_survivor_head); | |
| 223 _survivor_head = NULL; | |
| 545 | 224 _survivor_tail = NULL; |
| 342 | 225 _survivor_length = 0; |
| 226 | |
| 227 _last_sampled_rs_lengths = 0; | |
| 228 | |
| 229 assert(check_list_empty(false), "just making sure..."); | |
| 230 } | |
| 231 | |
| 232 bool YoungList::check_list_well_formed() { | |
| 233 bool ret = true; | |
| 234 | |
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235 uint length = 0; |
| 342 | 236 HeapRegion* curr = _head; |
| 237 HeapRegion* last = NULL; | |
| 238 while (curr != NULL) { | |
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239 if (!curr->is_young()) { |
| 342 | 240 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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241 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 242 curr->bottom(), curr->end(), |
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243 curr->is_young(), curr->is_survivor()); |
| 342 | 244 ret = false; |
| 245 } | |
| 246 ++length; | |
| 247 last = curr; | |
| 248 curr = curr->get_next_young_region(); | |
| 249 } | |
| 250 ret = ret && (length == _length); | |
| 251 | |
| 252 if (!ret) { | |
| 253 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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254 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
| 342 | 255 length, _length); |
| 256 } | |
| 257 | |
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258 return ret; |
| 342 | 259 } |
| 260 | |
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261 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 262 bool ret = true; |
| 263 | |
| 264 if (_length != 0) { | |
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265 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
| 342 | 266 _length); |
| 267 ret = false; | |
| 268 } | |
| 269 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 270 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 271 ret = false; | |
| 272 } | |
| 273 if (_head != NULL) { | |
| 274 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 275 ret = false; | |
| 276 } | |
| 277 if (!ret) { | |
| 278 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 279 } | |
| 280 | |
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281 return ret; |
| 342 | 282 } |
| 283 | |
| 284 void | |
| 285 YoungList::rs_length_sampling_init() { | |
| 286 _sampled_rs_lengths = 0; | |
| 287 _curr = _head; | |
| 288 } | |
| 289 | |
| 290 bool | |
| 291 YoungList::rs_length_sampling_more() { | |
| 292 return _curr != NULL; | |
| 293 } | |
| 294 | |
| 295 void | |
| 296 YoungList::rs_length_sampling_next() { | |
| 297 assert( _curr != NULL, "invariant" ); | |
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298 size_t rs_length = _curr->rem_set()->occupied(); |
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299 |
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300 _sampled_rs_lengths += rs_length; |
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301 |
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302 // The current region may not yet have been added to the |
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303 // incremental collection set (it gets added when it is |
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304 // retired as the current allocation region). |
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305 if (_curr->in_collection_set()) { |
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306 // Update the collection set policy information for this region |
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307 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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308 } |
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309 |
| 342 | 310 _curr = _curr->get_next_young_region(); |
| 311 if (_curr == NULL) { | |
| 312 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 313 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 314 } | |
| 315 } | |
| 316 | |
| 317 void | |
| 318 YoungList::reset_auxilary_lists() { | |
| 319 guarantee( is_empty(), "young list should be empty" ); | |
| 320 assert(check_list_well_formed(), "young list should be well formed"); | |
| 321 | |
| 322 // Add survivor regions to SurvRateGroup. | |
| 323 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 324 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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325 |
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326 int young_index_in_cset = 0; |
| 342 | 327 for (HeapRegion* curr = _survivor_head; |
| 328 curr != NULL; | |
| 329 curr = curr->get_next_young_region()) { | |
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330 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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331 |
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332 // The region is a non-empty survivor so let's add it to |
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333 // the incremental collection set for the next evacuation |
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334 // pause. |
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335 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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336 young_index_in_cset += 1; |
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337 } |
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338 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
| 342 | 339 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 340 | |
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341 _head = _survivor_head; |
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342 _length = _survivor_length; |
| 342 | 343 if (_survivor_head != NULL) { |
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344 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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345 assert(_survivor_length > 0, "invariant"); |
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346 _survivor_tail->set_next_young_region(NULL); |
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347 } |
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348 |
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349 // Don't clear the survivor list handles until the start of |
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350 // the next evacuation pause - we need it in order to re-tag |
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351 // the survivor regions from this evacuation pause as 'young' |
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352 // at the start of the next. |
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353 |
| 545 | 354 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 355 |
| 356 assert(check_list_well_formed(), "young list should be well formed"); | |
| 357 } | |
| 358 | |
| 359 void YoungList::print() { | |
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360 HeapRegion* lists[] = {_head, _survivor_head}; |
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361 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 362 |
| 363 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 364 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 365 HeapRegion *curr = lists[list]; | |
| 366 if (curr == NULL) | |
| 367 gclog_or_tty->print_cr(" empty"); | |
| 368 while (curr != NULL) { | |
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369 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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370 HR_FORMAT_PARAMS(curr), |
| 342 | 371 curr->prev_top_at_mark_start(), |
| 372 curr->next_top_at_mark_start(), | |
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373 curr->age_in_surv_rate_group_cond()); |
| 342 | 374 curr = curr->get_next_young_region(); |
| 375 } | |
| 376 } | |
| 377 | |
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378 gclog_or_tty->cr(); |
| 342 | 379 } |
| 380 | |
| 20337 | 381 void G1RegionMappingChangedListener::reset_from_card_cache(uint start_idx, size_t num_regions) { |
| 382 OtherRegionsTable::invalidate(start_idx, num_regions); | |
| 383 } | |
| 384 | |
| 385 void G1RegionMappingChangedListener::on_commit(uint start_idx, size_t num_regions) { | |
| 386 reset_from_card_cache(start_idx, num_regions); | |
| 387 } | |
| 388 | |
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389 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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390 { |
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391 // Claim the right to put the region on the dirty cards region list |
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392 // by installing a self pointer. |
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393 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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394 if (next == NULL) { |
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395 HeapRegion* res = (HeapRegion*) |
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396 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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397 NULL); |
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398 if (res == NULL) { |
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399 HeapRegion* head; |
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400 do { |
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401 // Put the region to the dirty cards region list. |
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402 head = _dirty_cards_region_list; |
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403 next = (HeapRegion*) |
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404 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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405 if (next == head) { |
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406 assert(hr->get_next_dirty_cards_region() == hr, |
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407 "hr->get_next_dirty_cards_region() != hr"); |
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408 if (next == NULL) { |
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409 // The last region in the list points to itself. |
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410 hr->set_next_dirty_cards_region(hr); |
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411 } else { |
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412 hr->set_next_dirty_cards_region(next); |
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413 } |
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414 } |
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415 } while (next != head); |
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416 } |
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417 } |
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418 } |
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419 |
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420 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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421 { |
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422 HeapRegion* head; |
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423 HeapRegion* hr; |
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424 do { |
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425 head = _dirty_cards_region_list; |
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426 if (head == NULL) { |
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427 return NULL; |
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428 } |
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429 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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430 if (head == new_head) { |
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431 // The last region. |
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432 new_head = NULL; |
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433 } |
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434 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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435 head); |
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436 } while (hr != head); |
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437 assert(hr != NULL, "invariant"); |
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438 hr->set_next_dirty_cards_region(NULL); |
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439 return hr; |
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440 } |
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441 |
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442 #ifdef ASSERT |
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443 // A region is added to the collection set as it is retired |
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444 // so an address p can point to a region which will be in the |
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445 // collection set but has not yet been retired. This method |
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446 // therefore is only accurate during a GC pause after all |
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447 // regions have been retired. It is used for debugging |
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448 // to check if an nmethod has references to objects that can |
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449 // be move during a partial collection. Though it can be |
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450 // inaccurate, it is sufficient for G1 because the conservative |
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451 // implementation of is_scavengable() for G1 will indicate that |
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452 // all nmethods must be scanned during a partial collection. |
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453 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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454 if (p == NULL) { |
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455 return false; |
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456 } |
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457 return heap_region_containing(p)->in_collection_set(); |
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458 } |
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459 #endif |
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460 |
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461 // Returns true if the reference points to an object that |
| 10405 | 462 // can move in an incremental collection. |
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463 bool G1CollectedHeap::is_scavengable(const void* p) { |
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464 HeapRegion* hr = heap_region_containing(p); |
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465 return !hr->isHumongous(); |
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466 } |
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467 |
| 342 | 468 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 469 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 12343 | 470 CardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 471 |
| 472 // Count the dirty cards at the start. | |
| 473 CountNonCleanMemRegionClosure count1(this); | |
| 474 ct_bs->mod_card_iterate(&count1); | |
| 475 int orig_count = count1.n(); | |
| 476 | |
| 477 // First clear the logged cards. | |
| 478 ClearLoggedCardTableEntryClosure clear; | |
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479 dcqs.apply_closure_to_all_completed_buffers(&clear); |
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480 dcqs.iterate_closure_all_threads(&clear, false); |
| 342 | 481 clear.print_histo(); |
| 482 | |
| 483 // Now ensure that there's no dirty cards. | |
| 484 CountNonCleanMemRegionClosure count2(this); | |
| 485 ct_bs->mod_card_iterate(&count2); | |
| 486 if (count2.n() != 0) { | |
| 487 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 488 count2.n(), orig_count); | |
| 489 } | |
| 490 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 491 | |
| 492 RedirtyLoggedCardTableEntryClosure redirty; | |
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493 dcqs.apply_closure_to_all_completed_buffers(&redirty); |
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494 dcqs.iterate_closure_all_threads(&redirty, false); |
| 342 | 495 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", |
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496 clear.num_processed(), orig_count); |
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497 guarantee(redirty.num_processed() == clear.num_processed(), |
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498 err_msg("Redirtied "SIZE_FORMAT" cards, bug cleared "SIZE_FORMAT, |
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499 redirty.num_processed(), clear.num_processed())); |
| 342 | 500 |
| 501 CountNonCleanMemRegionClosure count3(this); | |
| 502 ct_bs->mod_card_iterate(&count3); | |
| 503 if (count3.n() != orig_count) { | |
| 504 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 505 orig_count, count3.n()); | |
| 506 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 507 } | |
| 508 } | |
| 509 | |
| 510 // Private class members. | |
| 511 | |
| 512 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 513 | |
| 514 // Private methods. | |
| 515 | |
| 2152 | 516 HeapRegion* |
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517 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
| 2152 | 518 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 519 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 520 if (!_secondary_free_list.is_empty()) { | |
| 521 if (G1ConcRegionFreeingVerbose) { | |
| 522 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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523 "secondary_free_list has %u entries", |
| 2152 | 524 _secondary_free_list.length()); |
| 525 } | |
| 526 // It looks as if there are free regions available on the | |
| 527 // secondary_free_list. Let's move them to the free_list and try | |
| 528 // again to allocate from it. | |
| 529 append_secondary_free_list(); | |
| 530 | |
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531 assert(_hrm.num_free_regions() > 0, "if the secondary_free_list was not " |
| 2152 | 532 "empty we should have moved at least one entry to the free_list"); |
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533 HeapRegion* res = _hrm.allocate_free_region(is_old); |
| 2152 | 534 if (G1ConcRegionFreeingVerbose) { |
| 535 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 536 "allocated "HR_FORMAT" from secondary_free_list", | |
| 537 HR_FORMAT_PARAMS(res)); | |
| 538 } | |
| 539 return res; | |
| 540 } | |
| 541 | |
| 10405 | 542 // Wait here until we get notified either when (a) there are no |
| 2152 | 543 // more free regions coming or (b) some regions have been moved on |
| 544 // the secondary_free_list. | |
| 545 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 546 } | |
| 547 | |
| 548 if (G1ConcRegionFreeingVerbose) { | |
| 549 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 550 "could not allocate from secondary_free_list"); | |
| 551 } | |
| 552 return NULL; | |
| 553 } | |
| 554 | |
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555 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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556 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 557 "the only time we use this to allocate a humongous region is " |
| 558 "when we are allocating a single humongous region"); | |
| 559 | |
| 560 HeapRegion* res; | |
| 561 if (G1StressConcRegionFreeing) { | |
| 562 if (!_secondary_free_list.is_empty()) { | |
| 563 if (G1ConcRegionFreeingVerbose) { | |
| 564 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 565 "forced to look at the secondary_free_list"); | |
| 566 } | |
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567 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 568 if (res != NULL) { |
| 569 return res; | |
| 570 } | |
| 571 } | |
| 572 } | |
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573 |
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574 res = _hrm.allocate_free_region(is_old); |
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575 |
| 2152 | 576 if (res == NULL) { |
| 577 if (G1ConcRegionFreeingVerbose) { | |
| 578 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 579 "res == NULL, trying the secondary_free_list"); | |
| 580 } | |
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581 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 582 } |
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583 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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584 // Currently, only attempts to allocate GC alloc regions set |
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585 // do_expand to true. So, we should only reach here during a |
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586 // safepoint. If this assumption changes we might have to |
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587 // reconsider the use of _expand_heap_after_alloc_failure. |
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588 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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589 |
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590 ergo_verbose1(ErgoHeapSizing, |
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591 "attempt heap expansion", |
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592 ergo_format_reason("region allocation request failed") |
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593 ergo_format_byte("allocation request"), |
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594 word_size * HeapWordSize); |
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595 if (expand(word_size * HeapWordSize)) { |
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596 // Given that expand() succeeded in expanding the heap, and we |
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597 // always expand the heap by an amount aligned to the heap |
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598 // region size, the free list should in theory not be empty. |
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599 // In either case allocate_free_region() will check for NULL. |
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600 res = _hrm.allocate_free_region(is_old); |
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601 } else { |
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602 _expand_heap_after_alloc_failure = false; |
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603 } |
| 342 | 604 } |
| 605 return res; | |
| 606 } | |
| 607 | |
| 2361 | 608 HeapWord* |
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609 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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610 uint num_regions, |
| 2361 | 611 size_t word_size) { |
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612 assert(first != G1_NO_HRM_INDEX, "pre-condition"); |
| 2361 | 613 assert(isHumongous(word_size), "word_size should be humongous"); |
| 614 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 615 | |
| 616 // Index of last region in the series + 1. | |
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617 uint last = first + num_regions; |
| 2361 | 618 |
| 619 // We need to initialize the region(s) we just discovered. This is | |
| 620 // a bit tricky given that it can happen concurrently with | |
| 621 // refinement threads refining cards on these regions and | |
| 622 // potentially wanting to refine the BOT as they are scanning | |
| 623 // those cards (this can happen shortly after a cleanup; see CR | |
| 624 // 6991377). So we have to set up the region(s) carefully and in | |
| 625 // a specific order. | |
| 626 | |
| 627 // The word size sum of all the regions we will allocate. | |
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628 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 629 assert(word_size <= word_size_sum, "sanity"); |
| 630 | |
| 631 // This will be the "starts humongous" region. | |
| 3766 | 632 HeapRegion* first_hr = region_at(first); |
| 2361 | 633 // The header of the new object will be placed at the bottom of |
| 634 // the first region. | |
| 635 HeapWord* new_obj = first_hr->bottom(); | |
| 636 // This will be the new end of the first region in the series that | |
| 10405 | 637 // should also match the end of the last region in the series. |
| 2361 | 638 HeapWord* new_end = new_obj + word_size_sum; |
| 639 // This will be the new top of the first region that will reflect | |
| 640 // this allocation. | |
| 641 HeapWord* new_top = new_obj + word_size; | |
| 642 | |
| 643 // First, we need to zero the header of the space that we will be | |
| 644 // allocating. When we update top further down, some refinement | |
| 645 // threads might try to scan the region. By zeroing the header we | |
| 646 // ensure that any thread that will try to scan the region will | |
| 647 // come across the zero klass word and bail out. | |
| 648 // | |
| 649 // NOTE: It would not have been correct to have used | |
| 650 // CollectedHeap::fill_with_object() and make the space look like | |
| 651 // an int array. The thread that is doing the allocation will | |
| 652 // later update the object header to a potentially different array | |
| 653 // type and, for a very short period of time, the klass and length | |
| 654 // fields will be inconsistent. This could cause a refinement | |
| 655 // thread to calculate the object size incorrectly. | |
| 656 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 657 | |
| 658 // We will set up the first region as "starts humongous". This | |
| 659 // will also update the BOT covering all the regions to reflect | |
| 660 // that there is a single object that starts at the bottom of the | |
| 661 // first region. | |
| 662 first_hr->set_startsHumongous(new_top, new_end); | |
| 663 | |
| 664 // Then, if there are any, we will set up the "continues | |
| 665 // humongous" regions. | |
| 666 HeapRegion* hr = NULL; | |
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667 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 668 hr = region_at(i); |
| 2361 | 669 hr->set_continuesHumongous(first_hr); |
| 670 } | |
| 671 // If we have "continues humongous" regions (hr != NULL), then the | |
| 672 // end of the last one should match new_end. | |
| 673 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 674 | |
| 675 // Up to this point no concurrent thread would have been able to | |
| 676 // do any scanning on any region in this series. All the top | |
| 677 // fields still point to bottom, so the intersection between | |
| 678 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 679 // update the top fields, we'll do a storestore to make sure that | |
| 680 // no thread sees the update to top before the zeroing of the | |
| 681 // object header and the BOT initialization. | |
| 682 OrderAccess::storestore(); | |
| 683 | |
| 684 // Now that the BOT and the object header have been initialized, | |
| 685 // we can update top of the "starts humongous" region. | |
| 686 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 687 "new_top should be in this region"); | |
| 688 first_hr->set_top(new_top); | |
|
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689 if (_hr_printer.is_active()) { |
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690 HeapWord* bottom = first_hr->bottom(); |
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691 HeapWord* end = first_hr->orig_end(); |
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692 if ((first + 1) == last) { |
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693 // the series has a single humongous region |
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694 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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695 } else { |
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696 // the series has more than one humongous regions |
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697 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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698 } |
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699 } |
| 2361 | 700 |
| 701 // Now, we will update the top fields of the "continues humongous" | |
| 702 // regions. The reason we need to do this is that, otherwise, | |
| 703 // these regions would look empty and this will confuse parts of | |
| 704 // G1. For example, the code that looks for a consecutive number | |
| 705 // of empty regions will consider them empty and try to | |
| 706 // re-allocate them. We can extend is_empty() to also include | |
| 707 // !continuesHumongous(), but it is easier to just update the top | |
| 708 // fields here. The way we set top for all regions (i.e., top == | |
| 709 // end for all regions but the last one, top == new_top for the | |
| 710 // last one) is actually used when we will free up the humongous | |
| 711 // region in free_humongous_region(). | |
| 712 hr = NULL; | |
|
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713 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 714 hr = region_at(i); |
| 2361 | 715 if ((i + 1) == last) { |
| 716 // last continues humongous region | |
| 717 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 718 "new_top should fall on this region"); | |
| 719 hr->set_top(new_top); | |
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720 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 721 } else { |
| 722 // not last one | |
| 723 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 724 hr->set_top(hr->end()); | |
|
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725 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 726 } |
| 727 } | |
| 728 // If we have continues humongous regions (hr != NULL), then the | |
| 729 // end of the last one should match new_end and its top should | |
| 730 // match new_top. | |
| 731 assert(hr == NULL || | |
| 732 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
|
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733 check_bitmaps("Humongous Region Allocation", first_hr); |
| 2361 | 734 |
| 735 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 736 _summary_bytes_used += first_hr->used(); | |
| 737 _humongous_set.add(first_hr); | |
| 738 | |
| 739 return new_obj; | |
| 740 } | |
| 741 | |
| 342 | 742 // If could fit into free regions w/o expansion, try. |
| 743 // Otherwise, if can expand, do so. | |
| 744 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 745 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 746 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 747 | |
| 748 verify_region_sets_optional(); | |
| 342 | 749 |
|
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750 uint first = G1_NO_HRM_INDEX; |
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751 uint obj_regions = (uint)(align_size_up_(word_size, HeapRegion::GrainWords) / HeapRegion::GrainWords); |
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752 |
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753 if (obj_regions == 1) { |
|
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754 // Only one region to allocate, try to use a fast path by directly allocating |
|
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755 // from the free lists. Do not try to expand here, we will potentially do that |
|
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756 // later. |
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757 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
|
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758 if (hr != NULL) { |
|
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759 first = hr->hrm_index(); |
|
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760 } |
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761 } else { |
|
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762 // We can't allocate humongous regions spanning more than one region while |
|
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763 // cleanupComplete() is running, since some of the regions we find to be |
|
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764 // empty might not yet be added to the free list. It is not straightforward |
|
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765 // to know in which list they are on so that we can remove them. We only |
|
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766 // need to do this if we need to allocate more than one region to satisfy the |
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767 // current humongous allocation request. If we are only allocating one region |
| 20337 | 768 // we use the one-region region allocation code (see above), that already |
| 769 // potentially waits for regions from the secondary free list. | |
|
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770 wait_while_free_regions_coming(); |
|
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771 append_secondary_free_list_if_not_empty_with_lock(); |
|
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772 |
|
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773 // Policy: Try only empty regions (i.e. already committed first). Maybe we |
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774 // are lucky enough to find some. |
|
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775 first = _hrm.find_contiguous_only_empty(obj_regions); |
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776 if (first != G1_NO_HRM_INDEX) { |
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777 _hrm.allocate_free_regions_starting_at(first, obj_regions); |
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778 } |
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779 } |
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780 |
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781 if (first == G1_NO_HRM_INDEX) { |
|
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782 // Policy: We could not find enough regions for the humongous object in the |
|
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783 // free list. Look through the heap to find a mix of free and uncommitted regions. |
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784 // If so, try expansion. |
|
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785 first = _hrm.find_contiguous_empty_or_unavailable(obj_regions); |
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786 if (first != G1_NO_HRM_INDEX) { |
|
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787 // We found something. Make sure these regions are committed, i.e. expand |
|
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788 // the heap. Alternatively we could do a defragmentation GC. |
|
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789 ergo_verbose1(ErgoHeapSizing, |
|
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790 "attempt heap expansion", |
|
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791 ergo_format_reason("humongous allocation request failed") |
|
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792 ergo_format_byte("allocation request"), |
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793 word_size * HeapWordSize); |
|
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794 |
|
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795 _hrm.expand_at(first, obj_regions); |
|
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796 g1_policy()->record_new_heap_size(num_regions()); |
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797 |
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798 #ifdef ASSERT |
|
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799 for (uint i = first; i < first + obj_regions; ++i) { |
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800 HeapRegion* hr = region_at(i); |
|
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801 assert(hr->is_empty(), "sanity"); |
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802 assert(is_on_master_free_list(hr), "sanity"); |
|
2188
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803 } |
|
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804 #endif |
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805 _hrm.allocate_free_regions_starting_at(first, obj_regions); |
|
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806 } else { |
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807 // Policy: Potentially trigger a defragmentation GC. |
| 2152 | 808 } |
| 809 } | |
| 810 | |
| 2361 | 811 HeapWord* result = NULL; |
|
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812 if (first != G1_NO_HRM_INDEX) { |
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813 result = humongous_obj_allocate_initialize_regions(first, obj_regions, word_size); |
| 2361 | 814 assert(result != NULL, "it should always return a valid result"); |
|
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815 |
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816 // A successful humongous object allocation changes the used space |
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817 // information of the old generation so we need to recalculate the |
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818 // sizes and update the jstat counters here. |
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819 g1mm()->update_sizes(); |
| 2152 | 820 } |
| 821 | |
| 822 verify_region_sets_optional(); | |
| 2361 | 823 |
| 824 return result; | |
| 342 | 825 } |
| 826 | |
| 1973 | 827 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 828 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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829 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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830 |
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831 unsigned int dummy_gc_count_before; |
|
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832 int dummy_gclocker_retry_count = 0; |
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833 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
| 342 | 834 } |
| 835 | |
| 836 HeapWord* | |
| 837 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 838 bool* gc_overhead_limit_was_exceeded) { |
| 839 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 840 |
| 10405 | 841 // Loop until the allocation is satisfied, or unsatisfied after GC. |
|
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842 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
| 1973 | 843 unsigned int gc_count_before; |
|
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844 |
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845 HeapWord* result = NULL; |
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846 if (!isHumongous(word_size)) { |
|
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847 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
|
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848 } else { |
|
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849 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
|
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850 } |
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851 if (result != NULL) { |
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852 return result; |
| 342 | 853 } |
| 854 | |
| 855 // Create the garbage collection operation... | |
| 1973 | 856 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 857 // ...and get the VM thread to execute it. |
| 858 VMThread::execute(&op); | |
| 1973 | 859 |
| 860 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 861 // If the operation was successful we'll return the result even | |
| 862 // if it is NULL. If the allocation attempt failed immediately | |
| 863 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 864 HeapWord* result = op.result(); | |
| 865 if (result != NULL && !isHumongous(word_size)) { | |
| 866 // Allocations that take place on VM operations do not do any | |
| 867 // card dirtying and we have to do it here. We only have to do | |
| 868 // this for non-humongous allocations, though. | |
| 869 dirty_young_block(result, word_size); | |
| 870 } | |
| 342 | 871 return result; |
| 1973 | 872 } else { |
|
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873 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
|
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|
874 return NULL; |
|
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|
875 } |
| 1973 | 876 assert(op.result() == NULL, |
| 877 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 878 } |
| 879 | |
| 880 // Give a warning if we seem to be looping forever. | |
| 881 if ((QueuedAllocationWarningCount > 0) && | |
| 882 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 883 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 884 } |
| 885 } | |
| 1973 | 886 |
| 887 ShouldNotReachHere(); | |
|
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|
888 return NULL; |
| 342 | 889 } |
| 890 | |
|
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|
891 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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892 unsigned int *gc_count_before_ret, |
|
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893 int* gclocker_retry_count_ret) { |
|
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|
894 // Make sure you read the note in attempt_allocation_humongous(). |
|
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|
895 |
|
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|
896 assert_heap_not_locked_and_not_at_safepoint(); |
|
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897 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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|
898 "be called for humongous allocation requests"); |
|
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|
899 |
|
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|
900 // We should only get here after the first-level allocation attempt |
|
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|
901 // (attempt_allocation()) failed to allocate. |
|
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|
902 |
|
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|
903 // We will loop until a) we manage to successfully perform the |
|
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|
904 // allocation or b) we successfully schedule a collection which |
|
abdfc822206f
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|
905 // fails to perform the allocation. b) is the only case when we'll |
|
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|
906 // return NULL. |
|
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|
907 HeapWord* result = NULL; |
|
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|
908 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
909 bool should_try_gc; |
|
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|
910 unsigned int gc_count_before; |
|
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|
911 |
|
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|
912 { |
|
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|
913 MutexLockerEx x(Heap_lock); |
|
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|
914 |
|
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|
915 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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|
916 false /* bot_updates */); |
|
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|
917 if (result != NULL) { |
|
abdfc822206f
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|
918 return result; |
|
abdfc822206f
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|
919 } |
|
abdfc822206f
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|
920 |
|
abdfc822206f
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changeset
|
921 // If we reach here, attempt_allocation_locked() above failed to |
|
abdfc822206f
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changeset
|
922 // allocate a new region. So the mutator alloc region should be NULL. |
|
abdfc822206f
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|
923 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
|
abdfc822206f
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|
924 |
|
abdfc822206f
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|
925 if (GC_locker::is_active_and_needs_gc()) { |
|
abdfc822206f
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tonyp
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2432
diff
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|
926 if (g1_policy()->can_expand_young_list()) { |
|
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
927 // No need for an ergo verbose message here, |
|
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
928 // can_expand_young_list() does this when it returns true. |
|
2433
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parents:
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|
929 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
|
abdfc822206f
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2432
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|
930 false /* bot_updates */); |
|
abdfc822206f
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diff
changeset
|
931 if (result != NULL) { |
|
abdfc822206f
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parents:
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diff
changeset
|
932 return result; |
|
abdfc822206f
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parents:
2432
diff
changeset
|
933 } |
|
abdfc822206f
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|
934 } |
|
abdfc822206f
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changeset
|
935 should_try_gc = false; |
|
abdfc822206f
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|
936 } else { |
|
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
937 // The GCLocker may not be active but the GCLocker initiated |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
938 // GC may not yet have been performed (GCLocker::needs_gc() |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
939 // returns true). In this case we do not try this GC and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
940 // wait until the GCLocker initiated GC is performed, and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
941 // then retry the allocation. |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
942 if (GC_locker::needs_gc()) { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
943 should_try_gc = false; |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
944 } else { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
945 // Read the GC count while still holding the Heap_lock. |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
946 gc_count_before = total_collections(); |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
947 should_try_gc = true; |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
948 } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
949 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
950 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
951 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
952 if (should_try_gc) { |
|
abdfc822206f
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tonyp
parents:
2432
diff
changeset
|
953 bool succeeded; |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
954 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
955 GCCause::_g1_inc_collection_pause); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
956 if (result != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
957 assert(succeeded, "only way to get back a non-NULL result"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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diff
changeset
|
958 return result; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
959 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
960 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
961 if (succeeded) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
962 // If we get here we successfully scheduled a collection which |
|
abdfc822206f
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diff
changeset
|
963 // failed to allocate. No point in trying to allocate |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
964 // further. We'll just return NULL. |
|
abdfc822206f
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tonyp
parents:
2432
diff
changeset
|
965 MutexLockerEx x(Heap_lock); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
966 *gc_count_before_ret = total_collections(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
967 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
968 } |
|
abdfc822206f
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diff
changeset
|
969 } else { |
|
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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8038
diff
changeset
|
970 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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8038
diff
changeset
|
971 MutexLockerEx x(Heap_lock); |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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8038
diff
changeset
|
972 *gc_count_before_ret = total_collections(); |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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changeset
|
973 return NULL; |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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diff
changeset
|
974 } |
|
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
975 // The GCLocker is either active or the GCLocker initiated |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
976 // GC has not yet been performed. Stall until it is and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
977 // then retry the allocation. |
|
2433
abdfc822206f
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tonyp
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diff
changeset
|
978 GC_locker::stall_until_clear(); |
|
8853
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7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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8038
diff
changeset
|
979 (*gclocker_retry_count_ret) += 1; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
980 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
981 |
| 10405 | 982 // We can reach here if we were unsuccessful in scheduling a |
|
2433
abdfc822206f
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tonyp
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diff
changeset
|
983 // collection (because another thread beat us to it) or if we were |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
984 // stalled due to the GC locker. In either can we should retry the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
985 // allocation attempt in case another thread successfully |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
986 // performed a collection and reclaimed enough space. We do the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
987 // first attempt (without holding the Heap_lock) here and the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
988 // follow-on attempt will be at the start of the next loop |
|
abdfc822206f
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tonyp
parents:
2432
diff
changeset
|
989 // iteration (after taking the Heap_lock). |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
990 result = _mutator_alloc_region.attempt_allocation(word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
991 false /* bot_updates */); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
992 if (result != NULL) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
993 return result; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
994 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
995 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
996 // Give a warning if we seem to be looping forever. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
997 if ((QueuedAllocationWarningCount > 0) && |
|
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998 (try_count % QueuedAllocationWarningCount == 0)) { |
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999 warning("G1CollectedHeap::attempt_allocation_slow() " |
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1000 "retries %d times", try_count); |
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1001 } |
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1002 } |
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1003 |
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1004 ShouldNotReachHere(); |
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1005 return NULL; |
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1006 } |
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1007 |
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1008 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
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1009 unsigned int * gc_count_before_ret, |
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1010 int* gclocker_retry_count_ret) { |
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1011 // The structure of this method has a lot of similarities to |
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1012 // attempt_allocation_slow(). The reason these two were not merged |
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1013 // into a single one is that such a method would require several "if |
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1014 // allocation is not humongous do this, otherwise do that" |
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1015 // conditional paths which would obscure its flow. In fact, an early |
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1016 // version of this code did use a unified method which was harder to |
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1017 // follow and, as a result, it had subtle bugs that were hard to |
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1018 // track down. So keeping these two methods separate allows each to |
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1019 // be more readable. It will be good to keep these two in sync as |
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1020 // much as possible. |
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1021 |
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1022 assert_heap_not_locked_and_not_at_safepoint(); |
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1023 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
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1024 "should only be called for humongous allocations"); |
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1025 |
|
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1026 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
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1027 // need to start a marking cycle at each humongous object allocation. We do |
|
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1028 // the check before we do the actual allocation. The reason for doing it |
|
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1029 // before the allocation is that we avoid having to keep track of the newly |
|
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1030 // allocated memory while we do a GC. |
|
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1031 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
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1032 word_size)) { |
|
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1033 collect(GCCause::_g1_humongous_allocation); |
|
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1034 } |
|
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1035 |
|
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1036 // We will loop until a) we manage to successfully perform the |
|
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1037 // allocation or b) we successfully schedule a collection which |
|
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1038 // fails to perform the allocation. b) is the only case when we'll |
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1039 // return NULL. |
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1040 HeapWord* result = NULL; |
|
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1041 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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1042 bool should_try_gc; |
|
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1043 unsigned int gc_count_before; |
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1044 |
|
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1045 { |
|
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1046 MutexLockerEx x(Heap_lock); |
|
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1047 |
|
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1048 // Given that humongous objects are not allocated in young |
|
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1049 // regions, we'll first try to do the allocation without doing a |
|
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1050 // collection hoping that there's enough space in the heap. |
|
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1051 result = humongous_obj_allocate(word_size); |
|
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1052 if (result != NULL) { |
|
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1053 return result; |
|
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1054 } |
|
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1055 |
|
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1056 if (GC_locker::is_active_and_needs_gc()) { |
|
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1057 should_try_gc = false; |
|
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1058 } else { |
|
6106
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1059 // The GCLocker may not be active but the GCLocker initiated |
|
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1060 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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1061 // returns true). In this case we do not try this GC and |
|
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1062 // wait until the GCLocker initiated GC is performed, and |
|
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1063 // then retry the allocation. |
|
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1064 if (GC_locker::needs_gc()) { |
|
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1065 should_try_gc = false; |
|
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1066 } else { |
|
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1067 // Read the GC count while still holding the Heap_lock. |
|
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1068 gc_count_before = total_collections(); |
|
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1069 should_try_gc = true; |
|
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|
1070 } |
|
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1071 } |
|
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|
1072 } |
|
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|
1073 |
|
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|
1074 if (should_try_gc) { |
|
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1075 // If we failed to allocate the humongous object, we should try to |
|
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1076 // do a collection pause (if we're allowed) in case it reclaims |
|
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1077 // enough space for the allocation to succeed after the pause. |
|
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|
1078 |
|
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|
1079 bool succeeded; |
|
12113
f7d3b4387a16
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|
1080 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
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|
1081 GCCause::_g1_humongous_allocation); |
|
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1082 if (result != NULL) { |
|
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|
1083 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
1084 return result; |
|
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|
1085 } |
|
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|
1086 |
|
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|
1087 if (succeeded) { |
|
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|
1088 // If we get here we successfully scheduled a collection which |
|
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1089 // failed to allocate. No point in trying to allocate |
|
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1090 // further. We'll just return NULL. |
|
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1091 MutexLockerEx x(Heap_lock); |
|
4910
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1092 *gc_count_before_ret = total_collections(); |
|
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|
1093 return NULL; |
|
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|
1094 } |
|
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1095 } else { |
|
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1096 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
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1097 MutexLockerEx x(Heap_lock); |
|
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1098 *gc_count_before_ret = total_collections(); |
|
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1099 return NULL; |
|
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1100 } |
|
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1101 // The GCLocker is either active or the GCLocker initiated |
|
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1102 // GC has not yet been performed. Stall until it is and |
|
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1103 // then retry the allocation. |
|
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1104 GC_locker::stall_until_clear(); |
|
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1105 (*gclocker_retry_count_ret) += 1; |
|
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1106 } |
|
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|
1107 |
| 10405 | 1108 // We can reach here if we were unsuccessful in scheduling a |
|
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1109 // collection (because another thread beat us to it) or if we were |
|
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1110 // stalled due to the GC locker. In either can we should retry the |
|
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|
1111 // allocation attempt in case another thread successfully |
|
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|
1112 // performed a collection and reclaimed enough space. Give a |
|
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|
1113 // warning if we seem to be looping forever. |
|
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1114 |
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1115 if ((QueuedAllocationWarningCount > 0) && |
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1116 (try_count % QueuedAllocationWarningCount == 0)) { |
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1117 warning("G1CollectedHeap::attempt_allocation_humongous() " |
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1118 "retries %d times", try_count); |
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1119 } |
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1120 } |
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1121 |
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1122 ShouldNotReachHere(); |
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1123 return NULL; |
|
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1124 } |
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1125 |
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1126 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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1127 bool expect_null_mutator_alloc_region) { |
| 2152 | 1128 assert_at_safepoint(true /* should_be_vm_thread */); |
|
2433
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1129 assert(_mutator_alloc_region.get() == NULL || |
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1130 !expect_null_mutator_alloc_region, |
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1131 "the current alloc region was unexpectedly found to be non-NULL"); |
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1132 |
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1133 if (!isHumongous(word_size)) { |
|
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1134 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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1135 false /* bot_updates */); |
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1136 } else { |
|
4829
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1137 HeapWord* result = humongous_obj_allocate(word_size); |
|
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1138 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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1139 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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1140 } |
|
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|
1141 return result; |
|
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1142 } |
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1143 |
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1144 ShouldNotReachHere(); |
| 342 | 1145 } |
| 1146 | |
| 1147 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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1148 G1CollectedHeap* _g1h; |
| 342 | 1149 ModRefBarrierSet* _mr_bs; |
| 1150 public: | |
|
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1151 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
| 12080 | 1152 _g1h(g1h), _mr_bs(mr_bs) {} |
| 1153 | |
| 342 | 1154 bool doHeapRegion(HeapRegion* r) { |
| 12080 | 1155 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1156 | |
|
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1157 if (r->continuesHumongous()) { |
| 12080 | 1158 // We'll assert that the strong code root list and RSet is empty |
| 1159 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
| 1160 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
| 342 | 1161 return false; |
|
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1162 } |
| 12080 | 1163 |
|
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1164 _g1h->reset_gc_time_stamps(r); |
| 12080 | 1165 hrrs->clear(); |
| 342 | 1166 // You might think here that we could clear just the cards |
| 1167 // corresponding to the used region. But no: if we leave a dirty card | |
| 1168 // in a region we might allocate into, then it would prevent that card | |
| 1169 // from being enqueued, and cause it to be missed. | |
| 1170 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1171 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 12080 | 1172 |
| 342 | 1173 return false; |
| 1174 } | |
| 1175 }; | |
| 1176 | |
|
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1177 void G1CollectedHeap::clear_rsets_post_compaction() { |
| 12343 | 1178 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
|
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1179 heap_region_iterate(&rs_clear); |
|
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1180 } |
| 342 | 1181 |
|
626
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1182 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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1183 G1CollectedHeap* _g1h; |
|
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1184 UpdateRSOopClosure _cl; |
|
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1185 int _worker_i; |
|
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1186 public: |
|
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1187 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1188 _cl(g1->g1_rem_set(), worker_i), |
|
626
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1189 _worker_i(worker_i), |
|
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1190 _g1h(g1) |
|
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1191 { } |
|
1960
878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
johnc
parents:
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|
1192 |
|
626
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1193 bool doHeapRegion(HeapRegion* r) { |
|
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1194 if (!r->continuesHumongous()) { |
|
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1195 _cl.set_from(r); |
|
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1196 r->oop_iterate(&_cl); |
|
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1197 } |
|
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|
1198 return false; |
|
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|
1199 } |
|
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1200 }; |
|
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|
1201 |
|
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|
1202 class ParRebuildRSTask: public AbstractGangTask { |
|
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1203 G1CollectedHeap* _g1; |
|
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1204 public: |
|
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|
1205 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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1206 : AbstractGangTask("ParRebuildRSTask"), |
|
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1207 _g1(g1) |
|
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1208 { } |
|
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|
1209 |
|
4728
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|
1210 void work(uint worker_id) { |
|
441e946dc1af
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|
1211 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
441e946dc1af
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|
1212 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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|
1213 _g1->workers()->active_workers(), |
|
626
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1214 HeapRegion::RebuildRSClaimValue); |
|
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|
1215 } |
|
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|
1216 }; |
|
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|
1217 |
|
3778
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|
1218 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
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|
1219 private: |
|
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|
1220 G1HRPrinter* _hr_printer; |
|
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1221 public: |
|
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|
1222 bool doHeapRegion(HeapRegion* hr) { |
|
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|
1223 assert(!hr->is_young(), "not expecting to find young regions"); |
|
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|
1224 // We only generate output for non-empty regions. |
|
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|
1225 if (!hr->is_empty()) { |
|
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|
1226 if (!hr->isHumongous()) { |
|
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|
1227 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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|
1228 } else if (hr->startsHumongous()) { |
|
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1229 if (hr->region_num() == 1) { |
|
3778
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1230 // single humongous region |
|
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|
1231 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
5f6f2615433a
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|
1232 } else { |
|
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|
1233 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
5f6f2615433a
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|
1234 } |
|
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|
1235 } else { |
|
5f6f2615433a
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|
1236 assert(hr->continuesHumongous(), "only way to get here"); |
|
5f6f2615433a
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|
1237 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
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|
1238 } |
|
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|
1239 } |
|
5f6f2615433a
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|
1240 return false; |
|
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|
1241 } |
|
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|
1242 |
|
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|
1243 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
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|
1244 : _hr_printer(hr_printer) { } |
|
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|
1245 }; |
|
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|
1246 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
1247 void G1CollectedHeap::print_hrm_post_compaction() { |
|
6254
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|
1248 PostCompactionPrinterClosure cl(hr_printer()); |
|
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|
1249 heap_region_iterate(&cl); |
|
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|
1250 } |
|
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|
1251 |
| 1973 | 1252 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
4e5661ba9d98
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1611
diff
changeset
|
1253 bool clear_all_soft_refs, |
| 342 | 1254 size_t word_size) { |
| 2152 | 1255 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1256 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1257 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1258 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1259 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
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diff
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|
1260 |
| 10405 | 1261 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
|
13400
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8028128: Add a type safe alternative for working with counter based data
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|
1262 gc_timer->register_gc_start(); |
| 10405 | 1263 |
| 1264 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
| 1265 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
| 1266 | |
|
2125
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|
1267 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1268 ResourceMark rm; |
| 1269 | |
|
4872
aa3d708d67c4
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|
1270 print_heap_before_gc(); |
| 10405 | 1271 trace_heap_before_gc(gc_tracer); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
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|
1272 |
|
17866
270d7cb38f40
8038934: Remove prefix allocated_ from methods and variables in Metaspace
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|
1273 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
|
6725
da91efe96a93
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1274 |
| 2152 | 1275 verify_region_sets_optional(); |
| 342 | 1276 |
|
1387
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|
1277 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
|
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|
1278 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
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|
1279 |
|
0bfd3fb24150
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|
1280 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
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|
1281 |
| 342 | 1282 { |
| 1283 IsGCActiveMark x; | |
| 1284 | |
| 1285 // Timing | |
| 6030 | 1286 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
|
6007
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|
1287 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
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|
1288 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1289 |
| 342 | 1290 { |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
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|
1291 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL, gc_tracer->gc_id()); |
|
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1292 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
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|
1293 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
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|
1294 |
|
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|
1295 double start = os::elapsedTime(); |
|
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|
1296 g1_policy()->record_full_collection_start(); |
|
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|
1297 |
|
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|
1298 // Note: When we have a more flexible GC logging framework that |
|
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|
1299 // allows us to add optional attributes to a GC log record we |
|
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|
1300 // could consider timing and reporting how long we wait in the |
|
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|
1301 // following two methods. |
|
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|
1302 wait_while_free_regions_coming(); |
|
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|
1303 // If we start the compaction before the CM threads finish |
|
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|
1304 // scanning the root regions we might trip them over as we'll |
|
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|
1305 // be moving objects / updating references. So let's wait until |
|
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|
1306 // they are done. By telling them to abort, they should complete |
|
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|
1307 // early. |
|
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|
1308 _cm->root_regions()->abort(); |
|
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|
1309 _cm->root_regions()->wait_until_scan_finished(); |
|
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|
1310 append_secondary_free_list_if_not_empty_with_lock(); |
|
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|
1311 |
|
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|
1312 gc_prologue(true); |
|
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|
1313 increment_total_collections(true /* full gc */); |
|
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|
1314 increment_old_marking_cycles_started(); |
|
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|
1315 |
|
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|
1316 assert(used() == recalculate_used(), "Should be equal"); |
|
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|
1317 |
|
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|
1318 verify_before_gc(); |
|
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|
1319 |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
1320 check_bitmaps("Full GC Start"); |
| 10405 | 1321 pre_full_gc_dump(gc_timer); |
|
10098
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|
1322 |
|
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|
1323 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
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|
1324 |
|
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|
1325 // Disable discovery and empty the discovered lists |
|
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|
1326 // for the CM ref processor. |
|
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|
1327 ref_processor_cm()->disable_discovery(); |
|
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|
1328 ref_processor_cm()->abandon_partial_discovery(); |
|
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|
1329 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1330 |
|
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|
1331 // Abandon current iterations of concurrent marking and concurrent |
|
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|
1332 // refinement, if any are in progress. We have to do this before |
|
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|
1333 // wait_until_scan_finished() below. |
|
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|
1334 concurrent_mark()->abort(); |
|
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|
1335 |
|
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|
1336 // Make sure we'll choose a new allocation region afterwards. |
|
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|
1337 release_mutator_alloc_region(); |
|
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|
1338 abandon_gc_alloc_regions(); |
|
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|
1339 g1_rem_set()->cleanupHRRS(); |
|
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|
1340 |
|
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|
1341 // We should call this after we retire any currently active alloc |
|
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|
1342 // regions so that all the ALLOC / RETIRE events are generated |
|
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|
1343 // before the start GC event. |
|
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|
1344 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
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|
1345 |
|
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|
1346 // We may have added regions to the current incremental collection |
|
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|
1347 // set between the last GC or pause and now. We need to clear the |
|
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|
1348 // incremental collection set and then start rebuilding it afresh |
|
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|
1349 // after this full GC. |
|
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|
1350 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
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|
1351 g1_policy()->clear_incremental_cset(); |
|
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|
1352 g1_policy()->stop_incremental_cset_building(); |
|
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|
1353 |
|
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|
1354 tear_down_region_sets(false /* free_list_only */); |
|
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|
1355 g1_policy()->set_gcs_are_young(true); |
|
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|
1356 |
|
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|
1357 // See the comments in g1CollectedHeap.hpp and |
|
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|
1358 // G1CollectedHeap::ref_processing_init() about |
|
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|
1359 // how reference processing currently works in G1. |
|
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|
1360 |
|
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|
1361 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
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|
1362 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
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|
1363 |
|
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|
1364 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
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|
1365 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
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|
1366 |
|
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|
1367 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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|
1368 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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|
1369 |
|
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|
1370 // Do collection work |
|
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|
1371 { |
|
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|
1372 HandleMark hm; // Discard invalid handles created during gc |
|
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|
1373 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
|
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|
1374 } |
|
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|
1375 |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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|
1376 assert(num_free_regions() == 0, "we should not have added any free regions"); |
|
10098
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|
1377 rebuild_region_sets(false /* free_list_only */); |
|
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|
1378 |
|
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|
1379 // Enqueue any discovered reference objects that have |
|
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|
1380 // not been removed from the discovered lists. |
|
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|
1381 ref_processor_stw()->enqueue_discovered_references(); |
|
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|
1382 |
|
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|
1383 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
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|
1384 |
|
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|
1385 MemoryService::track_memory_usage(); |
|
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|
1386 |
|
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|
1387 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
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|
1388 ref_processor_stw()->verify_no_references_recorded(); |
|
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|
1389 |
|
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1390 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
|
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1391 ClassLoaderDataGraph::purge(); |
| 12080 | 1392 MetaspaceAux::verify_metrics(); |
|
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1393 |
|
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1394 // Note: since we've just done a full GC, concurrent |
|
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1395 // marking is no longer active. Therefore we need not |
|
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1396 // re-enable reference discovery for the CM ref processor. |
|
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1397 // That will be done at the start of the next marking cycle. |
|
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1398 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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1399 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1400 |
|
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1401 reset_gc_time_stamp(); |
|
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1402 // Since everything potentially moved, we will clear all remembered |
| 10405 | 1403 // sets, and clear all cards. Later we will rebuild remembered |
|
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1404 // sets. We will also reset the GC time stamps of the regions. |
|
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1405 clear_rsets_post_compaction(); |
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1406 check_gc_time_stamps(); |
|
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|
1407 |
|
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1408 // Resize the heap if necessary. |
|
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|
1409 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
|
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1410 |
|
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1411 if (_hr_printer.is_active()) { |
|
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1412 // We should do this after we potentially resize the heap so |
|
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1413 // that all the COMMIT / UNCOMMIT events are generated before |
|
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1414 // the end GC event. |
|
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1415 |
|
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1416 print_hrm_post_compaction(); |
|
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1417 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
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1418 } |
|
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1419 |
|
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1420 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
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|
1421 if (hot_card_cache->use_cache()) { |
|
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|
1422 hot_card_cache->reset_card_counts(); |
|
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|
1423 hot_card_cache->reset_hot_cache(); |
|
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1424 } |
|
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|
1425 |
|
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|
1426 // Rebuild remembered sets of all regions. |
|
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1427 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
1428 uint n_workers = |
|
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|
1429 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1430 workers()->active_workers(), |
|
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|
1431 Threads::number_of_non_daemon_threads()); |
|
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|
1432 assert(UseDynamicNumberOfGCThreads || |
|
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|
1433 n_workers == workers()->total_workers(), |
|
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1434 "If not dynamic should be using all the workers"); |
|
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|
1435 workers()->set_active_workers(n_workers); |
|
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|
1436 // Set parallel threads in the heap (_n_par_threads) only |
|
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1437 // before a parallel phase and always reset it to 0 after |
|
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1438 // the phase so that the number of parallel threads does |
|
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1439 // no get carried forward to a serial phase where there |
|
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1440 // may be code that is "possibly_parallel". |
|
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|
1441 set_par_threads(n_workers); |
|
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|
1442 |
|
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|
1443 ParRebuildRSTask rebuild_rs_task(this); |
|
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|
1444 assert(check_heap_region_claim_values( |
|
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|
1445 HeapRegion::InitialClaimValue), "sanity check"); |
|
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|
1446 assert(UseDynamicNumberOfGCThreads || |
|
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|
1447 workers()->active_workers() == workers()->total_workers(), |
|
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|
1448 "Unless dynamic should use total workers"); |
|
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|
1449 // Use the most recent number of active workers |
|
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|
1450 assert(workers()->active_workers() > 0, |
|
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|
1451 "Active workers not properly set"); |
|
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|
1452 set_par_threads(workers()->active_workers()); |
|
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|
1453 workers()->run_task(&rebuild_rs_task); |
|
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|
1454 set_par_threads(0); |
|
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|
1455 assert(check_heap_region_claim_values( |
|
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|
1456 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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|
1457 reset_heap_region_claim_values(); |
|
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|
1458 } else { |
|
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|
1459 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1460 heap_region_iterate(&rebuild_rs); |
|
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|
1461 } |
|
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|
1462 |
| 12080 | 1463 // Rebuild the strong code root lists for each region |
| 1464 rebuild_strong_code_roots(); | |
| 1465 | |
|
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|
1466 if (true) { // FIXME |
|
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|
1467 MetaspaceGC::compute_new_size(); |
|
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|
1468 } |
| 342 | 1469 |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
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545
diff
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|
1470 #ifdef TRACESPINNING |
|
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|
1471 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
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545
diff
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|
1472 #endif |
|
05c6d52fa7a9
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545
diff
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|
1473 |
|
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|
1474 // Discard all rset updates |
|
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|
1475 JavaThread::dirty_card_queue_set().abandon_logs(); |
|
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|
1476 assert(!G1DeferredRSUpdate |
|
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|
1477 || (G1DeferredRSUpdate && |
|
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|
1478 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
|
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|
1479 |
|
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|
1480 _young_list->reset_sampled_info(); |
|
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|
1481 // At this point there should be no regions in the |
|
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|
1482 // entire heap tagged as young. |
|
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|
1483 assert(check_young_list_empty(true /* check_heap */), |
|
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|
1484 "young list should be empty at this point"); |
|
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|
1485 |
|
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|
1486 // Update the number of full collections that have been completed. |
|
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|
1487 increment_old_marking_cycles_completed(false /* concurrent */); |
|
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1488 |
|
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|
1489 _hrm.verify_optional(); |
|
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|
1490 verify_region_sets_optional(); |
|
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|
1491 |
|
10373
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|
1492 verify_after_gc(); |
|
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|
1493 |
|
20291
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|
1494 // Clear the previous marking bitmap, if needed for bitmap verification. |
|
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|
1495 // Note we cannot do this when we clear the next marking bitmap in |
|
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|
1496 // ConcurrentMark::abort() above since VerifyDuringGC verifies the |
|
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|
1497 // objects marked during a full GC against the previous bitmap. |
|
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|
1498 // But we need to clear it before calling check_bitmaps below since |
|
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|
1499 // the full GC has compacted objects and updated TAMS but not updated |
|
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|
1500 // the prev bitmap. |
|
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|
1501 if (G1VerifyBitmaps) { |
|
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|
1502 ((CMBitMap*) concurrent_mark()->prevMarkBitMap())->clearAll(); |
|
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|
1503 } |
|
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|
1504 check_bitmaps("Full GC End"); |
|
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|
1505 |
|
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|
1506 // Start a new incremental collection set for the next pause |
|
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|
1507 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
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|
1508 g1_policy()->start_incremental_cset_building(); |
|
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|
1509 |
|
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|
1510 clear_cset_fast_test(); |
|
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|
1511 |
|
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|
1512 init_mutator_alloc_region(); |
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1513 |
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1514 double end = os::elapsedTime(); |
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1515 g1_policy()->record_full_collection_end(); |
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1516 |
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1517 if (G1Log::fine()) { |
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1518 g1_policy()->print_heap_transition(); |
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1519 } |
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1520 |
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1521 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1522 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1523 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1524 // before any GC notifications are raised. |
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1525 g1mm()->update_sizes(); |
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1526 |
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1527 gc_epilogue(true); |
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1528 } |
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1529 |
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1530 if (G1Log::finer()) { |
|
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1531 g1_policy()->print_detailed_heap_transition(true /* full */); |
|
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1532 } |
|
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1533 |
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1534 print_heap_after_gc(); |
| 10405 | 1535 trace_heap_after_gc(gc_tracer); |
| 1536 | |
| 1537 post_full_gc_dump(gc_timer); | |
| 1538 | |
|
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1539 gc_timer->register_gc_end(); |
| 10405 | 1540 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
|
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1541 } |
| 1973 | 1542 |
| 1543 return true; | |
| 342 | 1544 } |
| 1545 | |
| 1546 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1547 // do_collection() will return whether it succeeded in performing |
| 1548 // the GC. Currently, there is no facility on the | |
| 1549 // do_full_collection() API to notify the caller than the collection | |
| 1550 // did not succeed (e.g., because it was locked out by the GC | |
| 1551 // locker). So, right now, we'll ignore the return value. | |
| 1552 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1553 clear_all_soft_refs, | |
| 1554 0 /* word_size */); | |
| 342 | 1555 } |
| 1556 | |
| 1557 // This code is mostly copied from TenuredGeneration. | |
| 1558 void | |
| 1559 G1CollectedHeap:: | |
| 1560 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1561 // Include the current allocation, if any, and bytes that will be | |
| 1562 // pre-allocated to support collections, as "used". | |
| 1563 const size_t used_after_gc = used(); | |
| 1564 const size_t capacity_after_gc = capacity(); | |
| 1565 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1566 | |
|
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1567 // This is enforced in arguments.cpp. |
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1568 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1569 "otherwise the code below doesn't make sense"); |
|
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1570 |
| 342 | 1571 // We don't have floating point command-line arguments |
|
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1572 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1573 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
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1574 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1575 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1576 | |
|
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1577 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1578 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1579 |
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1580 // We have to be careful here as these two calculations can overflow |
|
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1581 // 32-bit size_t's. |
|
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1582 double used_after_gc_d = (double) used_after_gc; |
|
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1583 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1584 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
|
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1585 |
|
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1586 // Let's make sure that they are both under the max heap size, which |
|
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1587 // by default will make them fit into a size_t. |
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1588 double desired_capacity_upper_bound = (double) max_heap_size; |
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1589 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1590 desired_capacity_upper_bound); |
|
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1591 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1592 desired_capacity_upper_bound); |
|
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1593 |
|
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1594 // We can now safely turn them into size_t's. |
|
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1595 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1596 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
|
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|
1597 |
|
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1598 // This assert only makes sense here, before we adjust them |
|
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1599 // with respect to the min and max heap size. |
|
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1600 assert(minimum_desired_capacity <= maximum_desired_capacity, |
|
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1601 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
|
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1602 "maximum_desired_capacity = "SIZE_FORMAT, |
|
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1603 minimum_desired_capacity, maximum_desired_capacity)); |
|
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1604 |
|
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1605 // Should not be greater than the heap max size. No need to adjust |
|
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1606 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1607 // we'll try to make the capacity larger than it, not smaller). |
|
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1608 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
|
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1609 // Should not be less than the heap min size. No need to adjust it |
|
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1610 // with respect to the heap max size as it's an upper bound (i.e., |
|
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1611 // we'll try to make the capacity smaller than it, not greater). |
|
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1612 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1613 |
|
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1614 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1615 // Don't expand unless it's significant |
| 1616 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1617 ergo_verbose4(ErgoHeapSizing, |
|
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1618 "attempt heap expansion", |
|
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1619 ergo_format_reason("capacity lower than " |
|
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1620 "min desired capacity after Full GC") |
|
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1621 ergo_format_byte("capacity") |
|
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1622 ergo_format_byte("occupancy") |
|
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1623 ergo_format_byte_perc("min desired capacity"), |
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1624 capacity_after_gc, used_after_gc, |
|
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1625 minimum_desired_capacity, (double) MinHeapFreeRatio); |
|
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1626 expand(expand_bytes); |
| 342 | 1627 |
| 1628 // No expansion, now see if we want to shrink | |
|
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1629 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1630 // Capacity too large, compute shrinking size |
| 1631 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1632 ergo_verbose4(ErgoHeapSizing, |
|
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1633 "attempt heap shrinking", |
|
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1634 ergo_format_reason("capacity higher than " |
|
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1635 "max desired capacity after Full GC") |
|
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1636 ergo_format_byte("capacity") |
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1637 ergo_format_byte("occupancy") |
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1638 ergo_format_byte_perc("max desired capacity"), |
|
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1639 capacity_after_gc, used_after_gc, |
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1640 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1641 shrink(shrink_bytes); |
| 1642 } | |
| 1643 } | |
| 1644 | |
| 1645 | |
| 1646 HeapWord* | |
| 1973 | 1647 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1648 bool* succeeded) { | |
| 2152 | 1649 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1650 |
| 1651 *succeeded = true; | |
| 1652 // Let's attempt the allocation first. | |
|
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1653 HeapWord* result = |
|
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1654 attempt_allocation_at_safepoint(word_size, |
|
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1655 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1656 if (result != NULL) { |
| 1657 assert(*succeeded, "sanity"); | |
| 1658 return result; | |
| 1659 } | |
| 342 | 1660 |
| 1661 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1662 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1663 // expansion over collection. (This might change in the future if we can | |
| 1664 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1665 result = expand_and_allocate(word_size); | |
| 1666 if (result != NULL) { | |
| 1973 | 1667 assert(*succeeded, "sanity"); |
| 342 | 1668 return result; |
| 1669 } | |
| 1670 | |
| 1973 | 1671 // Expansion didn't work, we'll try to do a Full GC. |
| 1672 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1673 false, /* clear_all_soft_refs */ | |
| 1674 word_size); | |
| 1675 if (!gc_succeeded) { | |
| 1676 *succeeded = false; | |
| 1677 return NULL; | |
| 1678 } | |
| 1679 | |
| 1680 // Retry the allocation | |
| 1681 result = attempt_allocation_at_safepoint(word_size, | |
|
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|
1682 true /* expect_null_mutator_alloc_region */); |
| 342 | 1683 if (result != NULL) { |
| 1973 | 1684 assert(*succeeded, "sanity"); |
| 342 | 1685 return result; |
| 1686 } | |
| 1687 | |
| 1973 | 1688 // Then, try a Full GC that will collect all soft references. |
| 1689 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1690 true, /* clear_all_soft_refs */ | |
| 1691 word_size); | |
| 1692 if (!gc_succeeded) { | |
| 1693 *succeeded = false; | |
| 1694 return NULL; | |
| 1695 } | |
| 1696 | |
| 1697 // Retry the allocation once more | |
| 1698 result = attempt_allocation_at_safepoint(word_size, | |
|
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|
1699 true /* expect_null_mutator_alloc_region */); |
| 342 | 1700 if (result != NULL) { |
| 1973 | 1701 assert(*succeeded, "sanity"); |
| 342 | 1702 return result; |
| 1703 } | |
| 1704 | |
|
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|
1705 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1706 "Flag should have been handled and cleared prior to this point"); |
|
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1707 |
| 342 | 1708 // What else? We might try synchronous finalization later. If the total |
| 1709 // space available is large enough for the allocation, then a more | |
| 1710 // complete compaction phase than we've tried so far might be | |
| 1711 // appropriate. | |
| 1973 | 1712 assert(*succeeded, "sanity"); |
| 342 | 1713 return NULL; |
| 1714 } | |
| 1715 | |
| 1716 // Attempting to expand the heap sufficiently | |
| 1717 // to support an allocation of the given "word_size". If | |
| 1718 // successful, perform the allocation and return the address of the | |
| 1719 // allocated block, or else "NULL". | |
| 1720 | |
| 1721 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1722 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1723 | |
| 1724 verify_region_sets_optional(); | |
| 1973 | 1725 |
|
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|
1726 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1727 ergo_verbose1(ErgoHeapSizing, |
|
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1728 "attempt heap expansion", |
|
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1729 ergo_format_reason("allocation request failed") |
|
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1730 ergo_format_byte("allocation request"), |
|
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1731 word_size * HeapWordSize); |
|
2188
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1732 if (expand(expand_bytes)) { |
|
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1733 _hrm.verify_optional(); |
|
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1734 verify_region_sets_optional(); |
|
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1735 return attempt_allocation_at_safepoint(word_size, |
|
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1736 false /* expect_null_mutator_alloc_region */); |
|
2188
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1737 } |
|
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1738 return NULL; |
| 342 | 1739 } |
| 1740 | |
|
2188
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1741 bool G1CollectedHeap::expand(size_t expand_bytes) { |
|
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1742 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1743 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1744 HeapRegion::GrainBytes); | |
|
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1745 ergo_verbose2(ErgoHeapSizing, |
|
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1746 "expand the heap", |
|
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|
1747 ergo_format_byte("requested expansion amount") |
|
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|
1748 ergo_format_byte("attempted expansion amount"), |
|
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|
1749 expand_bytes, aligned_expand_bytes); |
|
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1750 |
|
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1751 if (is_maximal_no_gc()) { |
|
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1752 ergo_verbose0(ErgoHeapSizing, |
|
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1753 "did not expand the heap", |
|
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1754 ergo_format_reason("heap already fully expanded")); |
|
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1755 return false; |
|
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|
1756 } |
|
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1757 |
|
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|
1758 uint regions_to_expand = (uint)(aligned_expand_bytes / HeapRegion::GrainBytes); |
|
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1759 assert(regions_to_expand > 0, "Must expand by at least one region"); |
|
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1760 |
|
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1761 uint expanded_by = _hrm.expand_by(regions_to_expand); |
|
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1762 |
|
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1763 if (expanded_by > 0) { |
|
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|
1764 size_t actual_expand_bytes = expanded_by * HeapRegion::GrainBytes; |
| 3766 | 1765 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); |
|
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1766 g1_policy()->record_new_heap_size(num_regions()); |
|
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1767 } else { |
|
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1768 ergo_verbose0(ErgoHeapSizing, |
|
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1769 "did not expand the heap", |
|
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|
1770 ergo_format_reason("heap expansion operation failed")); |
|
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1771 // The expansion of the virtual storage space was unsuccessful. |
|
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|
1772 // Let's see if it was because we ran out of swap. |
|
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|
1773 if (G1ExitOnExpansionFailure && |
|
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|
1774 _hrm.available() >= regions_to_expand) { |
|
2188
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|
1775 // We had head room... |
|
10161
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|
1776 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
| 342 | 1777 } |
| 1778 } | |
|
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|
1779 return regions_to_expand > 0; |
| 342 | 1780 } |
| 1781 | |
| 3766 | 1782 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1783 size_t aligned_shrink_bytes = |
| 1784 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1785 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1786 HeapRegion::GrainBytes); | |
|
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|
1787 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
|
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1788 |
|
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|
1789 uint num_regions_removed = _hrm.shrink_by(num_regions_to_remove); |
|
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|
1790 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
|
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1791 |
|
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|
1792 ergo_verbose3(ErgoHeapSizing, |
|
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1793 "shrink the heap", |
|
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|
1794 ergo_format_byte("requested shrinking amount") |
|
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|
1795 ergo_format_byte("aligned shrinking amount") |
|
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|
1796 ergo_format_byte("attempted shrinking amount"), |
|
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|
1797 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
|
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|
1798 if (num_regions_removed > 0) { |
|
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|
1799 g1_policy()->record_new_heap_size(num_regions()); |
|
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1800 } else { |
|
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|
1801 ergo_verbose0(ErgoHeapSizing, |
|
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1802 "did not shrink the heap", |
|
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|
1803 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1804 } |
| 1805 } | |
| 1806 | |
| 1807 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1808 verify_region_sets_optional(); |
| 1809 | |
|
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1810 // We should only reach here at the end of a Full GC which means we |
|
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1811 // should not not be holding to any GC alloc regions. The method |
|
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|
1812 // below will make sure of that and do any remaining clean up. |
|
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|
1813 abandon_gc_alloc_regions(); |
|
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1814 |
| 2152 | 1815 // Instead of tearing down / rebuilding the free lists here, we |
| 1816 // could instead use the remove_all_pending() method on free_list to | |
| 1817 // remove only the ones that we need to remove. | |
| 4072 | 1818 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1819 shrink_helper(shrink_bytes); |
| 4072 | 1820 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1821 |
|
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1822 _hrm.verify_optional(); |
| 2152 | 1823 verify_region_sets_optional(); |
| 342 | 1824 } |
| 1825 | |
| 1826 // Public methods. | |
| 1827 | |
| 1828 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1829 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1830 #endif // _MSC_VER | |
| 1831 | |
| 1832 | |
| 1833 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1834 SharedHeap(policy_), | |
| 1835 _g1_policy(policy_), | |
| 1111 | 1836 _dirty_card_queue_set(false), |
| 1705 | 1837 _into_cset_dirty_card_queue_set(false), |
|
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|
1838 _is_alive_closure_cm(this), |
|
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|
1839 _is_alive_closure_stw(this), |
|
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|
1840 _ref_processor_cm(NULL), |
|
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|
1841 _ref_processor_stw(NULL), |
| 342 | 1842 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1843 _bot_shared(NULL), | |
| 10405 | 1844 _evac_failure_scan_stack(NULL), |
| 342 | 1845 _mark_in_progress(false), |
| 2152 | 1846 _cg1r(NULL), _summary_bytes_used(0), |
|
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|
1847 _g1mm(NULL), |
| 342 | 1848 _refine_cte_cl(NULL), |
| 1849 _full_collection(false), | |
|
17736
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|
1850 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
|
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|
1851 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
|
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1852 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
|
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|
1853 _humongous_is_live(), |
|
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|
1854 _has_humongous_reclaim_candidates(false), |
| 2152 | 1855 _free_regions_coming(false), |
| 342 | 1856 _young_list(new YoungList(this)), |
| 1857 _gc_time_stamp(0), | |
|
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|
1858 _retained_old_gc_alloc_region(NULL), |
| 6595 | 1859 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1860 _old_plab_stats(OldPLABSize, PLABWeight), | |
|
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|
1861 _expand_heap_after_alloc_failure(true), |
| 526 | 1862 _surviving_young_words(NULL), |
|
6120
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|
1863 _old_marking_cycles_started(0), |
|
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|
1864 _old_marking_cycles_completed(0), |
| 10405 | 1865 _concurrent_cycle_started(false), |
|
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|
1866 _in_cset_fast_test(), |
|
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1867 _dirty_cards_region_list(NULL), |
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1868 _worker_cset_start_region(NULL), |
| 10405 | 1869 _worker_cset_start_region_time_stamp(NULL), |
| 1870 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
| 1871 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
| 1872 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
| 1873 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
| 1874 | |
| 1875 _g1h = this; | |
| 342 | 1876 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
| 1877 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1878 } | |
|
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1879 |
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1880 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1881 |
| 342 | 1882 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1883 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1884 | |
|
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1885 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
| 342 | 1886 assert(n_rem_sets > 0, "Invariant."); |
| 1887 | |
| 6197 | 1888 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1889 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
| 10405 | 1890 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
|
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1891 |
| 342 | 1892 for (int i = 0; i < n_queues; i++) { |
| 1893 RefToScanQueue* q = new RefToScanQueue(); | |
| 1894 q->initialize(); | |
| 1895 _task_queues->register_queue(i, q); | |
| 10405 | 1896 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
| 1897 } | |
|
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1898 clear_cset_start_regions(); |
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1899 |
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1900 // Initialize the G1EvacuationFailureALot counters and flags. |
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1901 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1902 |
| 342 | 1903 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1904 } | |
| 1905 | |
| 1906 jint G1CollectedHeap::initialize() { | |
| 1166 | 1907 CollectedHeap::pre_initialize(); |
| 342 | 1908 os::enable_vtime(); |
| 1909 | |
|
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1910 G1Log::init(); |
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1911 |
| 342 | 1912 // Necessary to satisfy locking discipline assertions. |
| 1913 | |
| 1914 MutexLocker x(Heap_lock); | |
| 1915 | |
|
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1916 // We have to initialize the printer before committing the heap, as |
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1917 // it will be used then. |
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1918 _hr_printer.set_active(G1PrintHeapRegions); |
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1919 |
| 342 | 1920 // While there are no constraints in the GC code that HeapWordSize |
| 1921 // be any particular value, there are multiple other areas in the | |
| 1922 // system which believe this to be true (e.g. oop->object_size in some | |
| 1923 // cases incorrectly returns the size in wordSize units rather than | |
| 1924 // HeapWordSize). | |
| 1925 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 1926 | |
| 1927 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 1928 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
|
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1929 size_t heap_alignment = collector_policy()->heap_alignment(); |
| 342 | 1930 |
| 1931 // Ensure that the sizes are properly aligned. | |
| 1932 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1933 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
|
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1934 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
| 342 | 1935 |
|
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1936 _refine_cte_cl = new RefineCardTableEntryClosure(); |
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1937 |
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1938 _cg1r = new ConcurrentG1Refine(this, _refine_cte_cl); |
| 342 | 1939 |
| 1940 // Reserve the maximum. | |
|
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1941 |
|
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1942 // When compressed oops are enabled, the preferred heap base |
|
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1943 // is calculated by subtracting the requested size from the |
|
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1944 // 32Gb boundary and using the result as the base address for |
|
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1945 // heap reservation. If the requested size is not aligned to |
|
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1946 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
|
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1947 // into the ReservedHeapSpace constructor) then the actual |
|
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1948 // base of the reserved heap may end up differing from the |
|
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1949 // address that was requested (i.e. the preferred heap base). |
|
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1950 // If this happens then we could end up using a non-optimal |
|
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|
1951 // compressed oops mode. |
|
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1952 |
|
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|
1953 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
|
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|
1954 heap_alignment); |
| 342 | 1955 |
| 1956 // It is important to do this in a way such that concurrent readers can't | |
| 10405 | 1957 // temporarily think something is in the heap. (I've actually seen this |
| 342 | 1958 // happen in asserts: DLD.) |
| 1959 _reserved.set_word_size(0); | |
| 1960 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 1961 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 1962 | |
| 1963 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 1964 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 1965 set_barrier_set(rem_set()->bs()); | |
| 12343 | 1966 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
| 1967 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
| 342 | 1968 return JNI_ENOMEM; |
| 1969 } | |
| 1970 | |
| 1971 // Also create a G1 rem set. | |
| 12343 | 1972 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
| 342 | 1973 |
| 1974 // Carve out the G1 part of the heap. | |
| 1975 | |
|
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|
1976 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); |
| 20337 | 1977 G1RegionToSpaceMapper* heap_storage = |
| 1978 G1RegionToSpaceMapper::create_mapper(g1_rs, | |
| 1979 UseLargePages ? os::large_page_size() : os::vm_page_size(), | |
| 1980 HeapRegion::GrainBytes, | |
| 1981 1, | |
| 1982 mtJavaHeap); | |
| 1983 heap_storage->set_mapping_changed_listener(&_listener); | |
| 1984 | |
| 1985 // Reserve space for the block offset table. We do not support automatic uncommit | |
| 1986 // for the card table at this time. BOT only. | |
| 1987 ReservedSpace bot_rs(G1BlockOffsetSharedArray::compute_size(g1_rs.size() / HeapWordSize)); | |
| 1988 G1RegionToSpaceMapper* bot_storage = | |
| 1989 G1RegionToSpaceMapper::create_mapper(bot_rs, | |
| 1990 os::vm_page_size(), | |
| 1991 HeapRegion::GrainBytes, | |
| 1992 G1BlockOffsetSharedArray::N_bytes, | |
| 1993 mtGC); | |
| 1994 | |
| 1995 ReservedSpace cardtable_rs(G1SATBCardTableLoggingModRefBS::compute_size(g1_rs.size() / HeapWordSize)); | |
| 1996 G1RegionToSpaceMapper* cardtable_storage = | |
| 1997 G1RegionToSpaceMapper::create_mapper(cardtable_rs, | |
| 1998 os::vm_page_size(), | |
| 1999 HeapRegion::GrainBytes, | |
| 2000 G1BlockOffsetSharedArray::N_bytes, | |
| 2001 mtGC); | |
| 2002 | |
| 2003 // Reserve space for the card counts table. | |
| 2004 ReservedSpace card_counts_rs(G1BlockOffsetSharedArray::compute_size(g1_rs.size() / HeapWordSize)); | |
| 2005 G1RegionToSpaceMapper* card_counts_storage = | |
| 2006 G1RegionToSpaceMapper::create_mapper(card_counts_rs, | |
| 2007 os::vm_page_size(), | |
| 2008 HeapRegion::GrainBytes, | |
| 2009 G1BlockOffsetSharedArray::N_bytes, | |
| 2010 mtGC); | |
| 2011 | |
| 2012 // Reserve space for prev and next bitmap. | |
| 2013 size_t bitmap_size = CMBitMap::compute_size(g1_rs.size()); | |
| 2014 | |
| 2015 ReservedSpace prev_bitmap_rs(ReservedSpace::allocation_align_size_up(bitmap_size)); | |
| 2016 G1RegionToSpaceMapper* prev_bitmap_storage = | |
| 2017 G1RegionToSpaceMapper::create_mapper(prev_bitmap_rs, | |
| 2018 os::vm_page_size(), | |
| 2019 HeapRegion::GrainBytes, | |
| 2020 CMBitMap::mark_distance(), | |
| 2021 mtGC); | |
| 2022 | |
| 2023 ReservedSpace next_bitmap_rs(ReservedSpace::allocation_align_size_up(bitmap_size)); | |
| 2024 G1RegionToSpaceMapper* next_bitmap_storage = | |
| 2025 G1RegionToSpaceMapper::create_mapper(next_bitmap_rs, | |
| 2026 os::vm_page_size(), | |
| 2027 HeapRegion::GrainBytes, | |
| 2028 CMBitMap::mark_distance(), | |
| 2029 mtGC); | |
| 2030 | |
|
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|
2031 _hrm.initialize(heap_storage, prev_bitmap_storage, next_bitmap_storage, bot_storage, cardtable_storage, card_counts_storage); |
| 20337 | 2032 g1_barrier_set()->initialize(cardtable_storage); |
| 2033 // Do later initialization work for concurrent refinement. | |
| 2034 _cg1r->init(card_counts_storage); | |
|
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|
2035 |
|
807
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6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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|
2036 // 6843694 - ensure that the maximum region index can fit |
|
d44bdab1c03d
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|
2037 // in the remembered set structures. |
|
6010
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7157073: G1: type change size_t -> uint for region counts / indexes
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|
2038 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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|
2039 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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|
2040 |
|
d44bdab1c03d
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|
2041 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
|
942
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6819085: G1: use larger and/or user settable region size
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|
2042 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
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|
2043 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
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|
2044 "too many cards per region"); |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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|
2045 |
|
17736
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8034079: G1: Refactor the HeapRegionSet hierarchy
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|
2046 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
| 2152 | 2047 |
| 20337 | 2048 _bot_shared = new G1BlockOffsetSharedArray(_reserved, bot_storage); |
| 342 | 2049 |
| 2050 _g1h = this; | |
| 2051 | |
|
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|
2052 _in_cset_fast_test.initialize(_hrm.reserved().start(), _hrm.reserved().end(), HeapRegion::GrainBytes); |
|
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|
2053 _humongous_is_live.initialize(_hrm.reserved().start(), _hrm.reserved().end(), HeapRegion::GrainBytes); |
|
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|
2054 |
| 342 | 2055 // Create the ConcurrentMark data structure and thread. |
| 2056 // (Must do this late, so that "max_regions" is defined.) | |
| 20337 | 2057 _cm = new ConcurrentMark(this, prev_bitmap_storage, next_bitmap_storage); |
|
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|
2058 if (_cm == NULL || !_cm->completed_initialization()) { |
|
442f942757c0
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|
2059 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
|
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|
2060 return JNI_ENOMEM; |
|
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|
2061 } |
| 342 | 2062 _cmThread = _cm->cmThread(); |
| 2063 | |
| 2064 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2065 HeapRegionRemSet::init_heap(max_regions()); | |
| 2066 | |
| 677 | 2067 // Now expand into the initial heap size. |
|
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6923430: G1: assert(res != 0,"This should have worked.")
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|
2068 if (!expand(init_byte_size)) { |
|
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|
2069 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
|
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|
2070 return JNI_ENOMEM; |
|
c33825b68624
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|
2071 } |
| 342 | 2072 |
| 2073 // Perform any initialization actions delegated to the policy. | |
| 2074 g1_policy()->init(); | |
| 2075 | |
| 2076 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2077 SATB_Q_FL_lock, | |
| 1111 | 2078 G1SATBProcessCompletedThreshold, |
| 342 | 2079 Shared_SATB_Q_lock); |
| 794 | 2080 |
|
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|
2081 JavaThread::dirty_card_queue_set().initialize(_refine_cte_cl, |
|
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|
2082 DirtyCardQ_CBL_mon, |
| 794 | 2083 DirtyCardQ_FL_lock, |
| 1111 | 2084 concurrent_g1_refine()->yellow_zone(), |
| 2085 concurrent_g1_refine()->red_zone(), | |
| 794 | 2086 Shared_DirtyCardQ_lock); |
| 2087 | |
|
616
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|
2088 if (G1DeferredRSUpdate) { |
|
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|
2089 dirty_card_queue_set().initialize(NULL, // Should never be called by the Java code |
|
570cb6369f17
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|
2090 DirtyCardQ_CBL_mon, |
|
616
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|
2091 DirtyCardQ_FL_lock, |
| 1111 | 2092 -1, // never trigger processing |
| 2093 -1, // no limit on length | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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|
2094 Shared_DirtyCardQ_lock, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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diff
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|
2095 &JavaThread::dirty_card_queue_set()); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2096 } |
| 1705 | 2097 |
| 2098 // Initialize the card queue set used to hold cards containing | |
| 2099 // references into the collection set. | |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2100 _into_cset_dirty_card_queue_set.initialize(NULL, // Should never be called by the Java code |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2101 DirtyCardQ_CBL_mon, |
| 1705 | 2102 DirtyCardQ_FL_lock, |
| 2103 -1, // never trigger processing | |
| 2104 -1, // no limit on length | |
| 2105 Shared_DirtyCardQ_lock, | |
| 2106 &JavaThread::dirty_card_queue_set()); | |
| 2107 | |
| 342 | 2108 // In case we're keeping closure specialization stats, initialize those |
| 2109 // counts and that mechanism. | |
| 2110 SpecializationStats::clear(); | |
| 2111 | |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2112 // Here we allocate the dummy HeapRegion that is required by the |
|
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2113 // G1AllocRegion class. |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2114 HeapRegion* dummy_region = _hrm.get_dummy_region(); |
| 20337 | 2115 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2116 // We'll re-use the same region whether the alloc region will |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2117 // require BOT updates or not and, if it doesn't, then a non-young |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2118 // region will complain that it cannot support allocations without |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2119 // BOT updates. So we'll tag the dummy region as young to avoid that. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
2120 dummy_region->set_young(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
2121 // Make sure it's full. |
|
abdfc822206f
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tonyp
parents:
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diff
changeset
|
2122 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
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parents:
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diff
changeset
|
2123 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
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parents:
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diff
changeset
|
2124 |
|
abdfc822206f
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tonyp
parents:
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diff
changeset
|
2125 init_mutator_alloc_region(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2126 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2127 // Do create of the monitoring and management support so that |
|
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2128 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2129 _g1mm = new G1MonitoringSupport(this); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2130 |
| 17764 | 2131 G1StringDedup::initialize(); |
| 2132 | |
| 342 | 2133 return JNI_OK; |
| 2134 } | |
| 2135 | |
|
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2136 void G1CollectedHeap::stop() { |
| 17992 | 2137 // Stop all concurrent threads. We do this to make sure these threads |
| 2138 // do not continue to execute and access resources (e.g. gclog_or_tty) | |
|
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2139 // that are destroyed during shutdown. |
| 17992 | 2140 _cg1r->stop(); |
| 2141 _cmThread->stop(); | |
| 2142 if (G1StringDedup::is_enabled()) { | |
| 2143 G1StringDedup::stop(); | |
| 2144 } | |
|
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2145 } |
|
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2146 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2147 void G1CollectedHeap::clear_humongous_is_live_table() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
2148 guarantee(G1ReclaimDeadHumongousObjectsAtYoungGC, "Should only be called if true"); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2149 _humongous_is_live.clear(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2150 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2151 |
|
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2152 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2153 return HeapRegion::max_region_size(); |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2154 } |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2155 |
| 342 | 2156 void G1CollectedHeap::ref_processing_init() { |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2157 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2158 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2159 // * There are two reference processor instances. One is |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2160 // used to record and process discovered references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2161 // during concurrent marking; the other is used to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2162 // record and process references during STW pauses |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2163 // (both full and incremental). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
2164 // * Both ref processors need to 'span' the entire heap as |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2165 // the regions in the collection set may be dotted around. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2166 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2167 // * For the concurrent marking ref processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2168 // * Reference discovery is enabled at initial marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2169 // * Reference discovery is disabled and the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2170 // references processed etc during remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2171 // * Reference discovery is MT (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2172 // * Reference discovery requires a barrier (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2173 // * Reference processing may or may not be MT |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2174 // (depending on the value of ParallelRefProcEnabled |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2175 // and ParallelGCThreads). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2176 // * A full GC disables reference discovery by the CM |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2177 // ref processor and abandons any entries on it's |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2178 // discovered lists. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2179 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2180 // * For the STW processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2181 // * Non MT discovery is enabled at the start of a full GC. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2182 // * Processing and enqueueing during a full GC is non-MT. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2183 // * During a full GC, references are processed after marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2184 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2185 // * Discovery (may or may not be MT) is enabled at the start |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2186 // of an incremental evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2187 // * References are processed near the end of a STW evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2188 // * For both types of GC: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2189 // * Discovery is atomic - i.e. not concurrent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2190 // * Reference discovery will not need a barrier. |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2191 |
| 342 | 2192 SharedHeap::ref_processing_init(); |
| 2193 MemRegion mr = reserved_region(); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2194 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2195 // Concurrent Mark ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2196 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2197 new ReferenceProcessor(mr, // span |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2199 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 (int) ParallelGCThreads, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2202 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2203 // mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2204 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2206 false, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2207 // Reference discovery is not atomic |
|
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
parents:
17948
diff
changeset
|
2208 &_is_alive_closure_cm); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 // is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2210 // (for efficiency/performance) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // STW ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 _ref_processor_stw = |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 new ReferenceProcessor(mr, // span |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2217 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2218 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2219 (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2220 // mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2221 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2223 true, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2224 // Reference discovery is atomic |
|
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
parents:
17948
diff
changeset
|
2225 &_is_alive_closure_stw); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2226 // is alive closure |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2227 // (for efficiency/performance) |
| 342 | 2228 } |
| 2229 | |
| 2230 size_t G1CollectedHeap::capacity() const { | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2231 return _hrm.length() * HeapRegion::GrainBytes; |
| 342 | 2232 } |
| 2233 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2234 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2235 assert(!hr->continuesHumongous(), "pre-condition"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2236 hr->reset_gc_time_stamp(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2237 if (hr->startsHumongous()) { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2238 uint first_index = hr->hrm_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2239 uint last_index = hr->last_hc_index(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2240 for (uint i = first_index; i < last_index; i += 1) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2241 HeapRegion* chr = region_at(i); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2242 assert(chr->continuesHumongous(), "sanity"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2243 chr->reset_gc_time_stamp(); |
|
a2f7274eb6ef
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|
2244 } |
|
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|
2245 } |
|
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|
2246 } |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2247 |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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diff
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|
2248 #ifndef PRODUCT |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2249 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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6220
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|
2250 private: |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2251 unsigned _gc_time_stamp; |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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diff
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|
2252 bool _failures; |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2253 |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2254 public: |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2255 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2256 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2257 |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2258 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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|
2259 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2260 if (_gc_time_stamp != region_gc_time_stamp) { |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2261 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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6220
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|
2262 "expected %d", HR_FORMAT_PARAMS(hr), |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2263 region_gc_time_stamp, _gc_time_stamp); |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2264 _failures = true; |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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6220
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|
2265 } |
|
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6220
diff
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|
2266 return false; |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
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|
2267 } |
|
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|
2268 |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2269 bool failures() { return _failures; } |
|
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|
2270 }; |
|
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|
2271 |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2272 void G1CollectedHeap::check_gc_time_stamps() { |
|
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|
2273 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
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|
2274 heap_region_iterate(&cl); |
|
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diff
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|
2275 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
|
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|
2276 } |
|
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|
2277 #endif // PRODUCT |
|
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|
2278 |
| 1705 | 2279 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2280 DirtyCardQueue* into_cset_dcq, | |
| 2281 bool concurrent, | |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2282 uint worker_i) { |
| 889 | 2283 // Clean cards in the hot card cache |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2284 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
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10242
diff
changeset
|
2285 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2286 |
| 342 | 2287 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2288 int n_completed_buffers = 0; | |
| 1705 | 2289 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2290 n_completed_buffers++; |
| 2291 } | |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
2292 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
| 342 | 2293 dcqs.clear_n_completed_buffers(); |
| 2294 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2295 } | |
| 2296 | |
| 2297 | |
| 2298 // Computes the sum of the storage used by the various regions. | |
| 2299 | |
| 2300 size_t G1CollectedHeap::used() const { | |
|
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2301 assert(Heap_lock->owner() != NULL, |
|
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2302 "Should be owned on this thread's behalf."); |
| 342 | 2303 size_t result = _summary_bytes_used; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2304 // Read only once in case it is set to NULL concurrently |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2305 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
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|
2306 if (hr != NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2307 result += hr->used(); |
| 342 | 2308 return result; |
| 2309 } | |
| 2310 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2311 size_t G1CollectedHeap::used_unlocked() const { |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2312 size_t result = _summary_bytes_used; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2313 return result; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2314 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2315 |
| 342 | 2316 class SumUsedClosure: public HeapRegionClosure { |
| 2317 size_t _used; | |
| 2318 public: | |
| 2319 SumUsedClosure() : _used(0) {} | |
| 2320 bool doHeapRegion(HeapRegion* r) { | |
| 2321 if (!r->continuesHumongous()) { | |
| 2322 _used += r->used(); | |
| 2323 } | |
| 2324 return false; | |
| 2325 } | |
| 2326 size_t result() { return _used; } | |
| 2327 }; | |
| 2328 | |
| 2329 size_t G1CollectedHeap::recalculate_used() const { | |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2330 double recalculate_used_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2331 |
| 342 | 2332 SumUsedClosure blk; |
| 3766 | 2333 heap_region_iterate(&blk); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2334 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2335 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
| 342 | 2336 return blk.result(); |
| 2337 } | |
| 2338 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2339 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2340 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2341 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2342 case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2343 case GCCause::_g1_humongous_allocation: return true; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2344 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2345 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2346 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2347 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2348 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2349 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2350 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2351 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2352 // And as a result the region we'll allocate will be humongous. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2353 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2354 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2355 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2356 // Let's use the existing mechanism for the allocation |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2357 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2358 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2359 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2360 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2361 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2362 // If we can't allocate once, we probably cannot allocate |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2363 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2364 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2365 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2366 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2367 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2368 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2369 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2370 void G1CollectedHeap::increment_old_marking_cycles_started() { |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2371 assert(_old_marking_cycles_started == _old_marking_cycles_completed || |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2372 _old_marking_cycles_started == _old_marking_cycles_completed + 1, |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2373 err_msg("Wrong marking cycle count (started: %d, completed: %d)", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2374 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2375 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2376 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2377 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2378 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2379 void G1CollectedHeap::increment_old_marking_cycles_completed(bool concurrent) { |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2380 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2381 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2382 // We assume that if concurrent == true, then the caller is a |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2383 // concurrent thread that was joined the Suspendible Thread |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2384 // Set. If there's ever a cheap way to check this, we should add an |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2385 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2386 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2387 // Given that this method is called at the end of a Full GC or of a |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2388 // concurrent cycle, and those can be nested (i.e., a Full GC can |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2389 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2390 // completed should be either one (in the case where there was no |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2391 // nesting) or two (when a Full GC interrupted a concurrent cycle) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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|
2392 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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|
2393 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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|
2394 // This is the case for the inner caller, i.e. a Full GC. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
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1995
diff
changeset
|
2395 assert(concurrent || |
|
6120
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7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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|
2396 (_old_marking_cycles_started == _old_marking_cycles_completed + 1) || |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
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changeset
|
2397 (_old_marking_cycles_started == _old_marking_cycles_completed + 2), |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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changeset
|
2398 err_msg("for inner caller (Full GC): _old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
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diff
changeset
|
2399 "is inconsistent with _old_marking_cycles_completed = %u", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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changeset
|
2400 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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|
2401 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
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diff
changeset
|
2402 // This is the case for the outer caller, i.e. the concurrent cycle. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2403 assert(!concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
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changeset
|
2404 (_old_marking_cycles_started == _old_marking_cycles_completed + 1), |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2405 err_msg("for outer caller (concurrent cycle): " |
|
6120
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7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
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changeset
|
2406 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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changeset
|
2407 "is inconsistent with _old_marking_cycles_completed = %u", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
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changeset
|
2408 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
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changeset
|
2409 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
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changeset
|
2410 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2411 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2412 // We need to clear the "in_progress" flag in the CM thread before |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2413 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2414 // is set) so that if a waiter requests another System.gc() it doesn't |
| 10405 | 2415 // incorrectly see that a marking cycle is still in progress. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2416 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2417 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2418 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2419 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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1611
diff
changeset
|
2420 // This notify_all() will ensure that a thread that called |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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parents:
1611
diff
changeset
|
2421 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2422 // and it's waiting for a full GC to finish will be woken up. It is |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2423 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2424 FullGCCount_lock->notify_all(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2425 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2426 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2427 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
| 10405 | 2428 _concurrent_cycle_started = true; |
| 2429 _gc_timer_cm->register_gc_start(start_time); | |
| 2430 | |
| 2431 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
| 2432 trace_heap_before_gc(_gc_tracer_cm); | |
| 2433 } | |
| 2434 | |
| 2435 void G1CollectedHeap::register_concurrent_cycle_end() { | |
| 2436 if (_concurrent_cycle_started) { | |
| 2437 if (_cm->has_aborted()) { | |
| 2438 _gc_tracer_cm->report_concurrent_mode_failure(); | |
| 2439 } | |
|
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2440 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2441 _gc_timer_cm->register_gc_end(); |
| 10405 | 2442 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
| 2443 | |
| 2444 _concurrent_cycle_started = false; | |
| 2445 } | |
| 2446 } | |
| 2447 | |
| 2448 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
| 2449 if (_concurrent_cycle_started) { | |
| 2450 trace_heap_after_gc(_gc_tracer_cm); | |
| 2451 } | |
| 2452 } | |
| 2453 | |
| 2454 G1YCType G1CollectedHeap::yc_type() { | |
| 2455 bool is_young = g1_policy()->gcs_are_young(); | |
| 2456 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
| 2457 bool is_during_mark = mark_in_progress(); | |
| 2458 | |
| 2459 if (is_initial_mark) { | |
| 2460 return InitialMark; | |
| 2461 } else if (is_during_mark) { | |
| 2462 return DuringMark; | |
| 2463 } else if (is_young) { | |
| 2464 return Normal; | |
| 2465 } else { | |
| 2466 return Mixed; | |
| 2467 } | |
| 2468 } | |
| 2469 | |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2470 void G1CollectedHeap::collect(GCCause::Cause cause) { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2471 assert_heap_not_locked(); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2472 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2473 unsigned int gc_count_before; |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2474 unsigned int old_marking_count_before; |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2475 bool retry_gc; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2476 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2477 do { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2478 retry_gc = false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2479 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2480 { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2481 MutexLocker ml(Heap_lock); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2482 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2483 // Read the GC count while holding the Heap_lock |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2484 gc_count_before = total_collections(); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2485 old_marking_count_before = _old_marking_cycles_started; |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2486 } |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2487 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2488 if (should_do_concurrent_full_gc(cause)) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2489 // Schedule an initial-mark evacuation pause that will start a |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2490 // concurrent cycle. We're setting word_size to 0 which means that |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2491 // we are not requesting a post-GC allocation. |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2492 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2493 0, /* word_size */ |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2494 true, /* should_initiate_conc_mark */ |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2495 g1_policy()->max_pause_time_ms(), |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2496 cause); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2497 |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2498 VMThread::execute(&op); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2499 if (!op.pause_succeeded()) { |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2500 if (old_marking_count_before == _old_marking_cycles_started) { |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2501 retry_gc = op.should_retry_gc(); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2502 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2503 // A Full GC happened while we were trying to schedule the |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2504 // initial-mark GC. No point in starting a new cycle given |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2505 // that the whole heap was collected anyway. |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2506 } |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2507 |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2508 if (retry_gc) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2509 if (GC_locker::is_active_and_needs_gc()) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2510 GC_locker::stall_until_clear(); |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2511 } |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2512 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2513 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2514 } else { |
|
20357
4bfc44ba0d19
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
20337
diff
changeset
|
2515 if (cause == GCCause::_gc_locker || cause == GCCause::_wb_young_gc |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2516 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2517 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2518 // Schedule a standard evacuation pause. We're setting word_size |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2519 // to 0 which means that we are not requesting a post-GC allocation. |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2520 VM_G1IncCollectionPause op(gc_count_before, |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2521 0, /* word_size */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2522 false, /* should_initiate_conc_mark */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2523 g1_policy()->max_pause_time_ms(), |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2524 cause); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2525 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2526 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2527 // Schedule a Full GC. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2528 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2529 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2530 } |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2531 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2532 } while (retry_gc); |
| 342 | 2533 } |
| 2534 | |
| 2535 bool G1CollectedHeap::is_in(const void* p) const { | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2536 if (_hrm.reserved().contains(p)) { |
| 20337 | 2537 // Given that we know that p is in the reserved space, |
| 4708 | 2538 // heap_region_containing_raw() should successfully |
| 2539 // return the containing region. | |
| 2540 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2541 return hr->is_in(p); |
| 2542 } else { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2543 return false; |
| 342 | 2544 } |
| 2545 } | |
| 2546 | |
| 20337 | 2547 #ifdef ASSERT |
| 2548 bool G1CollectedHeap::is_in_exact(const void* p) const { | |
| 2549 bool contains = reserved_region().contains(p); | |
|
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|
2550 bool available = _hrm.is_available(addr_to_region((HeapWord*)p)); |
| 20337 | 2551 if (contains && available) { |
| 2552 return true; | |
| 2553 } else { | |
| 2554 return false; | |
| 2555 } | |
| 2556 } | |
| 2557 #endif | |
| 2558 | |
| 342 | 2559 // Iteration functions. |
| 2560 | |
|
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|
2561 // Applies an ExtendedOopClosure onto all references of objects within a HeapRegion. |
| 342 | 2562 |
| 2563 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
|
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2564 ExtendedOopClosure* _cl; |
| 342 | 2565 public: |
|
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|
2566 IterateOopClosureRegionClosure(ExtendedOopClosure* cl) : _cl(cl) {} |
| 342 | 2567 bool doHeapRegion(HeapRegion* r) { |
|
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2568 if (!r->continuesHumongous()) { |
| 342 | 2569 r->oop_iterate(_cl); |
| 2570 } | |
| 2571 return false; | |
| 2572 } | |
| 2573 }; | |
| 2574 | |
|
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|
2575 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
|
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|
2576 IterateOopClosureRegionClosure blk(cl); |
| 3766 | 2577 heap_region_iterate(&blk); |
| 342 | 2578 } |
| 2579 | |
| 2580 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2581 | |
| 2582 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2583 ObjectClosure* _cl; | |
| 2584 public: | |
| 2585 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2586 bool doHeapRegion(HeapRegion* r) { | |
| 2587 if (! r->continuesHumongous()) { | |
| 2588 r->object_iterate(_cl); | |
| 2589 } | |
| 2590 return false; | |
| 2591 } | |
| 2592 }; | |
| 2593 | |
|
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2594 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
| 342 | 2595 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2596 heap_region_iterate(&blk); |
| 342 | 2597 } |
| 2598 | |
| 2599 // Calls a SpaceClosure on a HeapRegion. | |
| 2600 | |
| 2601 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2602 SpaceClosure* _cl; | |
| 2603 public: | |
| 2604 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2605 bool doHeapRegion(HeapRegion* r) { | |
| 2606 _cl->do_space(r); | |
| 2607 return false; | |
| 2608 } | |
| 2609 }; | |
| 2610 | |
| 2611 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2612 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2613 heap_region_iterate(&blk); |
| 342 | 2614 } |
| 2615 | |
| 3766 | 2616 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
|
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|
2617 _hrm.iterate(cl); |
| 342 | 2618 } |
| 2619 | |
| 2620 void | |
| 2621 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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2622 uint worker_id, |
|
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|
2623 uint num_workers, |
|
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|
2624 jint claim_value) const { |
|
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|
2625 _hrm.par_iterate(cl, worker_id, num_workers, claim_value); |
| 355 | 2626 } |
| 2627 | |
| 390 | 2628 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2629 public: | |
| 2630 bool doHeapRegion(HeapRegion* r) { | |
| 2631 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2632 return false; | |
| 2633 } | |
| 2634 }; | |
| 2635 | |
|
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|
2636 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2637 ResetClaimValuesClosure blk; |
| 2638 heap_region_iterate(&blk); | |
| 2639 } | |
| 2640 | |
|
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|
2641 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
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|
2642 ResetClaimValuesClosure blk; |
|
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|
2643 collection_set_iterate(&blk); |
|
023652e49ac0
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|
2644 } |
|
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|
2645 |
| 355 | 2646 #ifdef ASSERT |
| 2647 // This checks whether all regions in the heap have the correct claim | |
| 2648 // value. I also piggy-backed on this a check to ensure that the | |
| 2649 // humongous_start_region() information on "continues humongous" | |
| 2650 // regions is correct. | |
| 2651 | |
| 2652 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2653 private: | |
| 2654 jint _claim_value; | |
|
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|
2655 uint _failures; |
| 355 | 2656 HeapRegion* _sh_region; |
|
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2657 |
| 355 | 2658 public: |
| 2659 CheckClaimValuesClosure(jint claim_value) : | |
| 2660 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2661 bool doHeapRegion(HeapRegion* r) { | |
| 2662 if (r->claim_value() != _claim_value) { | |
|
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|
2663 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2664 "claim value = %d, should be %d", |
|
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|
2665 HR_FORMAT_PARAMS(r), |
|
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|
2666 r->claim_value(), _claim_value); |
| 355 | 2667 ++_failures; |
| 2668 } | |
| 2669 if (!r->isHumongous()) { | |
| 2670 _sh_region = NULL; | |
| 2671 } else if (r->startsHumongous()) { | |
| 2672 _sh_region = r; | |
| 2673 } else if (r->continuesHumongous()) { | |
| 2674 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2675 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2676 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2677 HR_FORMAT_PARAMS(r), |
| 355 | 2678 r->humongous_start_region(), |
| 2679 _sh_region); | |
| 2680 ++_failures; | |
| 342 | 2681 } |
| 2682 } | |
| 355 | 2683 return false; |
| 2684 } | |
|
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|
2685 uint failures() { return _failures; } |
| 355 | 2686 }; |
| 2687 | |
| 2688 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2689 CheckClaimValuesClosure cl(claim_value); | |
| 2690 heap_region_iterate(&cl); | |
| 2691 return cl.failures() == 0; | |
| 2692 } | |
|
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|
2693 |
|
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|
2694 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
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|
2695 private: |
|
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|
2696 jint _claim_value; |
|
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|
2697 uint _failures; |
|
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|
2698 |
|
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|
2699 public: |
|
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|
2700 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
6010
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|
2701 _claim_value(claim_value), _failures(0) { } |
|
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|
2702 |
|
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|
2703 uint failures() { return _failures; } |
|
4097
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|
2704 |
|
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|
2705 bool doHeapRegion(HeapRegion* hr) { |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2706 assert(hr->in_collection_set(), "how?"); |
|
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|
2707 assert(!hr->isHumongous(), "H-region in CSet"); |
|
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|
2708 if (hr->claim_value() != _claim_value) { |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2709 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
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|
2710 "claim value = %d, should be %d", |
|
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|
2711 HR_FORMAT_PARAMS(hr), |
|
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|
2712 hr->claim_value(), _claim_value); |
|
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|
2713 _failures += 1; |
|
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|
2714 } |
|
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|
2715 return false; |
|
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changeset
|
2716 } |
|
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|
2717 }; |
|
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|
2718 |
|
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|
2719 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
dc467e8b2c5e
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|
2720 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2721 collection_set_iterate(&cl); |
|
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|
2722 return cl.failures() == 0; |
|
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|
2723 } |
| 355 | 2724 #endif // ASSERT |
| 342 | 2725 |
|
4709
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2726 // Clear the cached CSet starting regions and (more importantly) |
|
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2727 // the time stamps. Called when we reset the GC time stamp. |
|
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|
2728 void G1CollectedHeap::clear_cset_start_regions() { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2729 assert(_worker_cset_start_region != NULL, "sanity"); |
|
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|
2730 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
fd2b426c30db
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|
2731 |
|
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|
2732 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
fd2b426c30db
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changeset
|
2733 for (int i = 0; i < n_queues; i++) { |
|
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|
2734 _worker_cset_start_region[i] = NULL; |
|
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|
2735 _worker_cset_start_region_time_stamp[i] = 0; |
|
fd2b426c30db
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|
2736 } |
|
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|
2737 } |
|
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|
2738 |
|
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|
2739 // Given the id of a worker, obtain or calculate a suitable |
|
fd2b426c30db
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changeset
|
2740 // starting region for iterating over the current collection set. |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2741 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(uint worker_i) { |
|
4709
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|
2742 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
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|
2743 |
|
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|
2744 HeapRegion* result = NULL; |
|
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changeset
|
2745 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
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|
2746 |
|
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|
2747 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
|
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|
2748 // Cached starting region for current worker was set |
|
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changeset
|
2749 // during the current pause - so it's valid. |
|
fd2b426c30db
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|
2750 // Note: the cached starting heap region may be NULL |
|
fd2b426c30db
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|
2751 // (when the collection set is empty). |
|
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changeset
|
2752 result = _worker_cset_start_region[worker_i]; |
|
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changeset
|
2753 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2754 return result; |
|
fd2b426c30db
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diff
changeset
|
2755 } |
|
fd2b426c30db
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|
2756 |
|
fd2b426c30db
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changeset
|
2757 // The cached entry was not valid so let's calculate |
|
fd2b426c30db
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changeset
|
2758 // a suitable starting heap region for this worker. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2759 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2760 // We want the parallel threads to start their collection |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2761 // set iteration at different collection set regions to |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2762 // avoid contention. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2763 // If we have: |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2764 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2765 // p threads |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2766 // Then thread t will start at region floor ((t * n) / p) |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2767 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2768 result = g1_policy()->collection_set(); |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2769 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2770 uint cs_size = g1_policy()->cset_region_length(); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2771 uint active_workers = workers()->active_workers(); |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2772 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2773 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2774 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2775 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2776 uint end_ind = (cs_size * worker_i) / active_workers; |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2777 uint start_ind = 0; |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2778 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2779 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2780 _worker_cset_start_region_time_stamp[worker_i - 1] == gc_time_stamp) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2781 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2782 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2783 start_ind = (cs_size * (worker_i - 1)) / active_workers; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2784 result = _worker_cset_start_region[worker_i - 1]; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2785 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2786 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2787 for (uint i = start_ind; i < end_ind; i++) { |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2788 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2789 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2790 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2791 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2792 // Note: the calculated starting heap region may be NULL |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2793 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2794 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2795 assert(_worker_cset_start_region_time_stamp[worker_i] != gc_time_stamp, |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2796 "should be updated only once per pause"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2797 _worker_cset_start_region[worker_i] = result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2798 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2799 _worker_cset_start_region_time_stamp[worker_i] = gc_time_stamp; |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2800 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2801 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2802 |
| 342 | 2803 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2804 HeapRegion* r = g1_policy()->collection_set(); | |
| 2805 while (r != NULL) { | |
| 2806 HeapRegion* next = r->next_in_collection_set(); | |
| 2807 if (cl->doHeapRegion(r)) { | |
| 2808 cl->incomplete(); | |
| 2809 return; | |
| 2810 } | |
| 2811 r = next; | |
| 2812 } | |
| 2813 } | |
| 2814 | |
| 2815 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2816 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2817 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2818 // The CSet is empty so there's nothing to do. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2819 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2820 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2821 |
| 342 | 2822 assert(r->in_collection_set(), |
| 2823 "Start region must be a member of the collection set."); | |
| 2824 HeapRegion* cur = r; | |
| 2825 while (cur != NULL) { | |
| 2826 HeapRegion* next = cur->next_in_collection_set(); | |
| 2827 if (cl->doHeapRegion(cur) && false) { | |
| 2828 cl->incomplete(); | |
| 2829 return; | |
| 2830 } | |
| 2831 cur = next; | |
| 2832 } | |
| 2833 cur = g1_policy()->collection_set(); | |
| 2834 while (cur != r) { | |
| 2835 HeapRegion* next = cur->next_in_collection_set(); | |
| 2836 if (cl->doHeapRegion(cur) && false) { | |
| 2837 cl->incomplete(); | |
| 2838 return; | |
| 2839 } | |
| 2840 cur = next; | |
| 2841 } | |
| 2842 } | |
| 2843 | |
|
20304
a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
tschatzl
parents:
20282
diff
changeset
|
2844 HeapRegion* G1CollectedHeap::next_compaction_region(const HeapRegion* from) const { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2845 HeapRegion* result = _hrm.next_region_in_heap(from); |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2846 while (result != NULL && result->isHumongous()) { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2847 result = _hrm.next_region_in_heap(result); |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2848 } |
|
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2849 return result; |
|
20304
a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
tschatzl
parents:
20282
diff
changeset
|
2850 } |
| 342 | 2851 |
| 2852 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
2853 return heap_region_containing(addr); |
| 342 | 2854 } |
| 2855 | |
| 2856 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2857 Space* sp = space_containing(addr); | |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
2858 return sp->block_start(addr); |
| 342 | 2859 } |
| 2860 | |
| 2861 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 2862 Space* sp = space_containing(addr); | |
| 2863 return sp->block_size(addr); | |
| 2864 } | |
| 2865 | |
| 2866 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 2867 Space* sp = space_containing(addr); | |
| 2868 return sp->block_is_obj(addr); | |
| 2869 } | |
| 2870 | |
| 2871 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 2872 return true; | |
| 2873 } | |
| 2874 | |
| 2875 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 17727 | 2876 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
| 2877 } | |
| 2878 | |
| 2879 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
| 2880 return young_list()->eden_used_bytes(); | |
| 2881 } | |
| 2882 | |
| 2883 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
| 2884 // must be smaller than the humongous object limit. | |
| 2885 size_t G1CollectedHeap::max_tlab_size() const { | |
| 2886 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
| 342 | 2887 } |
| 2888 | |
| 2889 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 2890 // Return the remaining space in the cur alloc region, but not less than | |
| 2891 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2892 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2893 // Also, this value can be at most the humongous object threshold, |
| 10405 | 2894 // since we can't allow tlabs to grow big enough to accommodate |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2895 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2896 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2897 HeapRegion* hr = _mutator_alloc_region.get(); |
| 17727 | 2898 size_t max_tlab = max_tlab_size() * wordSize; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2899 if (hr == NULL) { |
| 17727 | 2900 return max_tlab; |
| 342 | 2901 } else { |
| 17727 | 2902 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
| 342 | 2903 } |
| 2904 } | |
| 2905 | |
| 2906 size_t G1CollectedHeap::max_capacity() const { | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2907 return _hrm.reserved().byte_size(); |
| 342 | 2908 } |
| 2909 | |
| 2910 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 2911 // assert(false, "NYI"); | |
| 2912 return 0; | |
| 2913 } | |
| 2914 | |
| 2915 void G1CollectedHeap::prepare_for_verify() { | |
| 2916 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 2917 ensure_parsability(false); | |
| 2918 } | |
| 2919 g1_rem_set()->prepare_for_verify(); | |
| 2920 } | |
| 2921 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2922 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2923 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2924 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2925 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2926 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2927 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2928 return hr->obj_allocated_since_next_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2929 case VerifyOption_G1UseMarkWord: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2930 return false; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2931 default: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2932 ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2933 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2934 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2935 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2936 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2937 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2938 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2939 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2940 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2941 case VerifyOption_G1UseMarkWord: return NULL; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2942 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2943 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2944 return NULL; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2945 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2946 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2947 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2948 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2949 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2950 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
|
a2f7274eb6ef
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2951 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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2952 default: ShouldNotReachHere(); |
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2953 } |
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2954 return false; // keep some compilers happy |
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2955 } |
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2956 |
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2957 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
|
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2958 switch (vo) { |
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2959 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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2960 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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2961 case VerifyOption_G1UseMarkWord: return "NONE"; |
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2962 default: ShouldNotReachHere(); |
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2963 } |
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2964 return NULL; // keep some compilers happy |
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2965 } |
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2966 |
|
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2967 class VerifyRootsClosure: public OopClosure { |
| 12080 | 2968 private: |
| 2969 G1CollectedHeap* _g1h; | |
| 2970 VerifyOption _vo; | |
| 2971 bool _failures; | |
| 2972 public: | |
| 2973 // _vo == UsePrevMarking -> use "prev" marking information, | |
| 2974 // _vo == UseNextMarking -> use "next" marking information, | |
| 2975 // _vo == UseMarkWord -> use mark word from object header. | |
| 2976 VerifyRootsClosure(VerifyOption vo) : | |
| 2977 _g1h(G1CollectedHeap::heap()), | |
| 2978 _vo(vo), | |
| 2979 _failures(false) { } | |
| 2980 | |
| 2981 bool failures() { return _failures; } | |
| 2982 | |
| 2983 template <class T> void do_oop_nv(T* p) { | |
| 2984 T heap_oop = oopDesc::load_heap_oop(p); | |
| 2985 if (!oopDesc::is_null(heap_oop)) { | |
| 2986 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 2987 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
| 2988 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
| 2989 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
| 2990 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 2991 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
| 2992 } | |
| 2993 obj->print_on(gclog_or_tty); | |
| 2994 _failures = true; | |
| 2995 } | |
| 2996 } | |
| 2997 } | |
| 2998 | |
| 2999 void do_oop(oop* p) { do_oop_nv(p); } | |
| 3000 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 3001 }; | |
| 3002 | |
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3003 class G1VerifyCodeRootOopClosure: public OopClosure { |
| 12080 | 3004 G1CollectedHeap* _g1h; |
| 3005 OopClosure* _root_cl; | |
| 3006 nmethod* _nm; | |
| 3007 VerifyOption _vo; | |
| 3008 bool _failures; | |
| 3009 | |
| 3010 template <class T> void do_oop_work(T* p) { | |
| 3011 // First verify that this root is live | |
| 3012 _root_cl->do_oop(p); | |
| 3013 | |
| 3014 if (!G1VerifyHeapRegionCodeRoots) { | |
| 3015 // We're not verifying the code roots attached to heap region. | |
| 3016 return; | |
| 3017 } | |
| 3018 | |
| 3019 // Don't check the code roots during marking verification in a full GC | |
| 3020 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3021 return; | |
| 3022 } | |
| 3023 | |
| 3024 // Now verify that the current nmethod (which contains p) is | |
| 3025 // in the code root list of the heap region containing the | |
| 3026 // object referenced by p. | |
| 3027 | |
| 3028 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3029 if (!oopDesc::is_null(heap_oop)) { | |
| 3030 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3031 | |
| 3032 // Now fetch the region containing the object | |
| 3033 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
| 3034 HeapRegionRemSet* hrrs = hr->rem_set(); | |
| 3035 // Verify that the strong code root list for this region | |
| 3036 // contains the nmethod | |
| 3037 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
| 3038 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
| 3039 "from nmethod "PTR_FORMAT" not in strong " | |
| 3040 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
| 3041 p, _nm, hr->bottom(), hr->end()); | |
| 3042 _failures = true; | |
| 3043 } | |
| 3044 } | |
| 3045 } | |
| 3046 | |
| 3047 public: | |
| 3048 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
| 3049 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
| 3050 | |
| 3051 void do_oop(oop* p) { do_oop_work(p); } | |
| 3052 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 3053 | |
| 3054 void set_nmethod(nmethod* nm) { _nm = nm; } | |
| 3055 bool failures() { return _failures; } | |
| 3056 }; | |
| 3057 | |
| 3058 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
| 3059 G1VerifyCodeRootOopClosure* _oop_cl; | |
| 3060 | |
| 3061 public: | |
| 3062 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
| 3063 _oop_cl(oop_cl) {} | |
| 3064 | |
| 3065 void do_code_blob(CodeBlob* cb) { | |
| 3066 nmethod* nm = cb->as_nmethod_or_null(); | |
| 3067 if (nm != NULL) { | |
| 3068 _oop_cl->set_nmethod(nm); | |
| 3069 nm->oops_do(_oop_cl); | |
| 3070 } | |
| 3071 } | |
| 3072 }; | |
| 3073 | |
| 3074 class YoungRefCounterClosure : public OopClosure { | |
| 3075 G1CollectedHeap* _g1h; | |
| 3076 int _count; | |
| 3077 public: | |
| 3078 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
| 3079 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
| 3080 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 3081 | |
| 3082 int count() { return _count; } | |
| 3083 void reset_count() { _count = 0; }; | |
| 3084 }; | |
| 3085 | |
| 3086 class VerifyKlassClosure: public KlassClosure { | |
| 3087 YoungRefCounterClosure _young_ref_counter_closure; | |
| 3088 OopClosure *_oop_closure; | |
| 3089 public: | |
| 3090 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
| 3091 void do_klass(Klass* k) { | |
| 3092 k->oops_do(_oop_closure); | |
| 3093 | |
| 3094 _young_ref_counter_closure.reset_count(); | |
| 3095 k->oops_do(&_young_ref_counter_closure); | |
| 3096 if (_young_ref_counter_closure.count() > 0) { | |
| 3097 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
| 3098 } | |
| 3099 } | |
| 3100 }; | |
| 3101 | |
| 342 | 3102 class VerifyLivenessOopClosure: public OopClosure { |
|
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3103 G1CollectedHeap* _g1h; |
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3104 VerifyOption _vo; |
| 342 | 3105 public: |
|
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3106 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
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3107 _g1h(g1h), _vo(vo) |
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3108 { } |
|
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3109 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3110 void do_oop( oop *p) { do_oop_work(p); } |
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3111 |
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|
3112 template <class T> void do_oop_work(T *p) { |
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3113 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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3114 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
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|
3115 "Dead object referenced by a not dead object"); |
| 342 | 3116 } |
| 3117 }; | |
| 3118 | |
| 3119 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3120 private: |
| 342 | 3121 G1CollectedHeap* _g1h; |
| 3122 size_t _live_bytes; | |
| 3123 HeapRegion *_hr; | |
|
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|
3124 VerifyOption _vo; |
| 342 | 3125 public: |
|
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|
3126 // _vo == UsePrevMarking -> use "prev" marking information, |
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3127 // _vo == UseNextMarking -> use "next" marking information, |
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3128 // _vo == UseMarkWord -> use mark word from object header. |
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|
3129 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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|
3130 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3131 _g1h = G1CollectedHeap::heap(); |
| 3132 } | |
| 3133 void do_object(oop o) { | |
|
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|
3134 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3135 assert(o != NULL, "Huh?"); |
|
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|
3136 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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|
3137 // If the object is alive according to the mark word, |
|
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|
3138 // then verify that the marking information agrees. |
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|
3139 // Note we can't verify the contra-positive of the |
|
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|
3140 // above: if the object is dead (according to the mark |
|
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|
3141 // word), it may not be marked, or may have been marked |
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|
3142 // but has since became dead, or may have been allocated |
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|
3143 // since the last marking. |
|
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|
3144 if (_vo == VerifyOption_G1UseMarkWord) { |
|
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|
3145 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
|
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|
3146 } |
|
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|
3147 |
|
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|
3148 o->oop_iterate_no_header(&isLive); |
|
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|
3149 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
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|
3150 size_t obj_size = o->size(); // Make sure we don't overflow |
|
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|
3151 _live_bytes += (obj_size * HeapWordSize); |
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|
3152 } |
| 342 | 3153 } |
| 3154 } | |
| 3155 size_t live_bytes() { return _live_bytes; } | |
| 3156 }; | |
| 3157 | |
| 3158 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3159 HeapRegion *_hr; | |
| 3160 G1CollectedHeap *_g1; | |
| 3161 public: | |
| 3162 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3163 _g1 = G1CollectedHeap::heap(); | |
| 3164 }; | |
| 3165 | |
| 3166 void do_object(oop o) { | |
| 3167 if (o != NULL) { | |
| 3168 HeapWord *start = (HeapWord *) o; | |
| 3169 size_t word_sz = o->size(); | |
| 3170 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3171 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3172 (void*) o, word_sz, | |
| 3173 _g1->isMarkedPrev(o), | |
| 3174 _g1->isMarkedNext(o), | |
| 3175 _hr->obj_allocated_since_prev_marking(o)); | |
| 3176 HeapWord *end = start + word_sz; | |
| 3177 HeapWord *cur; | |
| 3178 int *val; | |
| 3179 for (cur = start; cur < end; cur++) { | |
| 3180 val = (int *) cur; | |
| 3181 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3182 } | |
| 3183 } | |
| 3184 } | |
| 3185 }; | |
| 3186 | |
| 3187 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3188 private: |
|
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3189 bool _par; |
|
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3190 VerifyOption _vo; |
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3191 bool _failures; |
| 811 | 3192 public: |
|
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|
3193 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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3194 // _vo == UseNextMarking -> use "next" marking information, |
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|
3195 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3196 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3197 : _par(par), | |
|
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|
3198 _vo(vo), |
|
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|
3199 _failures(false) {} |
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3200 |
|
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|
3201 bool failures() { |
|
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|
3202 return _failures; |
|
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|
3203 } |
|
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|
3204 |
| 342 | 3205 bool doHeapRegion(HeapRegion* r) { |
|
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|
3206 if (!r->continuesHumongous()) { |
|
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|
3207 bool failures = false; |
| 6008 | 3208 r->verify(_vo, &failures); |
|
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|
3209 if (failures) { |
|
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|
3210 _failures = true; |
|
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|
3211 } else { |
|
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|
3212 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
1020
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3213 r->object_iterate(¬_dead_yet_cl); |
|
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|
3214 if (_vo != VerifyOption_G1UseNextMarking) { |
|
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|
3215 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
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|
3216 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
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|
3217 "max_live_bytes "SIZE_FORMAT" " |
|
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|
3218 "< calculated "SIZE_FORMAT, |
|
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|
3219 r->bottom(), r->end(), |
|
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|
3220 r->max_live_bytes(), |
|
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|
3221 not_dead_yet_cl.live_bytes()); |
|
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|
3222 _failures = true; |
|
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|
3223 } |
|
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diff
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|
3224 } else { |
|
2ace1c4ee8da
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|
3225 // When vo == UseNextMarking we cannot currently do a sanity |
|
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|
3226 // check on the live bytes as the calculation has not been |
|
2ace1c4ee8da
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|
3227 // finalized yet. |
|
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|
3228 } |
|
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|
3229 } |
| 342 | 3230 } |
|
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|
3231 return false; // stop the region iteration if we hit a failure |
| 342 | 3232 } |
| 3233 }; | |
| 3234 | |
| 12080 | 3235 // This is the task used for parallel verification of the heap regions |
| 390 | 3236 |
| 3237 class G1ParVerifyTask: public AbstractGangTask { | |
| 3238 private: | |
| 3239 G1CollectedHeap* _g1h; | |
|
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|
3240 VerifyOption _vo; |
|
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|
3241 bool _failures; |
| 390 | 3242 |
| 3243 public: | |
|
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|
3244 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3245 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3246 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3247 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3248 AbstractGangTask("Parallel verify task"), |
|
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
3249 _g1h(g1h), |
|
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|
3250 _vo(vo), |
|
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|
3251 _failures(false) { } |
|
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|
3252 |
|
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|
3253 bool failures() { |
|
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|
3254 return _failures; |
|
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|
3255 } |
| 390 | 3256 |
|
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7121618: Change type of number of GC workers to unsigned int.
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|
3257 void work(uint worker_id) { |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
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diff
changeset
|
3258 HandleMark hm; |
| 6008 | 3259 VerifyRegionClosure blk(true, _vo); |
|
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|
3260 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
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|
3261 _g1h->workers()->active_workers(), |
| 390 | 3262 HeapRegion::ParVerifyClaimValue); |
|
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|
3263 if (blk.failures()) { |
|
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|
3264 _failures = true; |
|
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|
3265 } |
| 390 | 3266 } |
| 3267 }; | |
| 3268 | |
| 12080 | 3269 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
|
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8010463: G1: Crashes with -UseTLAB and heap verification
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diff
changeset
|
3270 if (SafepointSynchronize::is_at_safepoint()) { |
| 12080 | 3271 assert(Thread::current()->is_VM_thread(), |
| 3272 "Expected to be executed serially by the VM thread at this point"); | |
| 3273 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
3274 if (!silent) { gclog_or_tty->print("Roots "); } |
|
3772
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|
3275 VerifyRootsClosure rootsCl(vo); |
|
6725
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|
3276 VerifyKlassClosure klassCl(this, &rootsCl); |
|
20278
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|
3277 CLDToKlassAndOopClosure cldCl(&klassCl, &rootsCl, false); |
|
3772
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|
3278 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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3289
diff
changeset
|
3279 // We apply the relevant closures to all the oops in the |
|
20278
2c6ef90f030a
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changeset
|
3280 // system dictionary, class loader data graph, the string table |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
3281 // and the nmethods in the code cache. |
|
20257
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
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20256
diff
changeset
|
3282 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
|
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
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diff
changeset
|
3283 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); |
|
20278
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8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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|
3284 |
|
2c6ef90f030a
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changeset
|
3285 process_all_roots(true, // activate StrongRootsScope |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
3286 SO_AllCodeCache, // roots scanning options |
|
2c6ef90f030a
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stefank
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diff
changeset
|
3287 &rootsCl, |
|
2c6ef90f030a
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diff
changeset
|
3288 &cldCl, |
|
2c6ef90f030a
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changeset
|
3289 &blobsCl); |
|
20257
7426d8d76305
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diff
changeset
|
3290 |
| 12080 | 3291 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
|
3772
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|
3292 |
|
6747fd0512e0
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changeset
|
3293 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
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diff
changeset
|
3294 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
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diff
changeset
|
3295 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
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diff
changeset
|
3296 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
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diff
changeset
|
3297 // the region sets when not in a full GC. |
|
6747fd0512e0
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diff
changeset
|
3298 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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3766
diff
changeset
|
3299 verify_region_sets(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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3766
diff
changeset
|
3300 } |
|
6747fd0512e0
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diff
changeset
|
3301 |
| 2152 | 3302 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3303 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3304 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3305 "sanity check"); | |
| 3306 | |
| 6008 | 3307 G1ParVerifyTask task(this, vo); |
|
4095
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diff
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|
3308 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
3309 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
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|
3310 "If not dynamic should be using all the workers"); |
|
bca17e38de00
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diff
changeset
|
3311 int n_workers = workers()->active_workers(); |
| 390 | 3312 set_par_threads(n_workers); |
| 3313 workers()->run_task(&task); | |
| 3314 set_par_threads(0); | |
|
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changeset
|
3315 if (task.failures()) { |
|
ff2402f6a50b
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diff
changeset
|
3316 failures = true; |
|
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changeset
|
3317 } |
| 390 | 3318 |
|
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4090
diff
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|
3319 // Checks that the expected amount of parallel work was done. |
|
bca17e38de00
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diff
changeset
|
3320 // The implication is that n_workers is > 0. |
| 390 | 3321 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3322 "sanity check"); | |
| 3323 | |
| 3324 reset_heap_region_claim_values(); | |
| 3325 | |
| 3326 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3327 "sanity check"); | |
| 3328 } else { | |
| 6008 | 3329 VerifyRegionClosure blk(false, vo); |
| 3766 | 3330 heap_region_iterate(&blk); |
|
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|
3331 if (blk.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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diff
changeset
|
3332 failures = true; |
|
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diff
changeset
|
3333 } |
| 390 | 3334 } |
| 2152 | 3335 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3336 rem_set()->verify(); |
|
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diff
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|
3337 |
| 17764 | 3338 if (G1StringDedup::is_enabled()) { |
| 3339 if (!silent) gclog_or_tty->print("StrDedup "); | |
| 3340 G1StringDedup::verify(); | |
| 3341 } | |
| 3342 | |
|
1020
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|
3343 if (failures) { |
|
ff2402f6a50b
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diff
changeset
|
3344 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3345 // It helps to have the per-region information in the output to |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
changeset
|
3346 // help us track down what went wrong. This is why we call |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
changeset
|
3347 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3348 print_extended_on(gclog_or_tty); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3349 gclog_or_tty->cr(); |
|
1547
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6951319: enable solaris builds using Sun Studio 12 update 1
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1545
diff
changeset
|
3350 #ifndef PRODUCT |
| 1044 | 3351 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3352 concurrent_mark()->print_reachable("at-verification-failure", |
|
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|
3353 vo, false /* all */); |
|
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|
3354 } |
|
1547
fb1a39993f69
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1545
diff
changeset
|
3355 #endif |
|
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diff
changeset
|
3356 gclog_or_tty->flush(); |
|
ff2402f6a50b
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diff
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|
3357 } |
|
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changeset
|
3358 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3359 } else { |
| 17764 | 3360 if (!silent) { |
| 3361 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
| 3362 if (G1StringDedup::is_enabled()) { | |
| 3363 gclog_or_tty->print(", StrDedup"); | |
| 3364 } | |
| 3365 gclog_or_tty->print(") "); | |
| 3366 } | |
| 342 | 3367 } |
| 3368 } | |
| 3369 | |
| 12080 | 3370 void G1CollectedHeap::verify(bool silent) { |
| 3371 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3372 } | |
| 3373 | |
| 3374 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
| 3375 double verify_time_ms = 0.0; | |
| 3376 | |
| 3377 if (guard && total_collections() >= VerifyGCStartAt) { | |
| 3378 double verify_start = os::elapsedTime(); | |
| 3379 HandleMark hm; // Discard invalid handles created during verification | |
| 3380 prepare_for_verify(); | |
| 3381 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
| 3382 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
| 3383 } | |
| 3384 | |
| 3385 return verify_time_ms; | |
| 3386 } | |
| 3387 | |
| 3388 void G1CollectedHeap::verify_before_gc() { | |
| 3389 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
| 3390 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
| 3391 } | |
| 3392 | |
| 3393 void G1CollectedHeap::verify_after_gc() { | |
| 3394 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
| 3395 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
| 3396 } | |
| 3397 | |
| 342 | 3398 class PrintRegionClosure: public HeapRegionClosure { |
| 3399 outputStream* _st; | |
| 3400 public: | |
| 3401 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3402 bool doHeapRegion(HeapRegion* r) { | |
| 3403 r->print_on(_st); | |
| 3404 return false; | |
| 3405 } | |
| 3406 }; | |
| 3407 | |
|
17833
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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17774
diff
changeset
|
3408 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
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17774
diff
changeset
|
3409 const HeapRegion* hr, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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17774
diff
changeset
|
3410 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3411 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3412 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3413 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3414 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3415 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3416 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3417 return false; // keep some compilers happy |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3418 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3419 |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3420 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3421 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3422 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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parents:
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diff
changeset
|
3423 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3424 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3425 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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parents:
17774
diff
changeset
|
3426 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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parents:
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diff
changeset
|
3427 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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parents:
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diff
changeset
|
3428 return false; // keep some compilers happy |
|
bfdf528be8e8
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tschatzl
parents:
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diff
changeset
|
3429 } |
|
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changeset
|
3430 |
| 342 | 3431 void G1CollectedHeap::print_on(outputStream* st) const { |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
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|
3432 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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811
diff
changeset
|
3433 st->print(" total " SIZE_FORMAT "K, used " SIZE_FORMAT "K", |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
3434 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
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diff
changeset
|
3435 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3436 _hrm.reserved().start(), |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3437 _hrm.reserved().start() + _hrm.length() + HeapRegion::GrainWords, |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3438 _hrm.reserved().end()); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3439 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3440 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3441 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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parents:
6008
diff
changeset
|
3442 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
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diff
changeset
|
3443 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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parents:
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diff
changeset
|
3444 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
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diff
changeset
|
3445 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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parents:
6008
diff
changeset
|
3446 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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parents:
811
diff
changeset
|
3447 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3448 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3449 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3450 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
4072
diff
changeset
|
3451 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3452 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3453 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3454 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
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diff
changeset
|
3455 st->cr(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
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diff
changeset
|
3456 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
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diff
changeset
|
3457 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
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diff
changeset
|
3458 "CS=collection set, F=free, TS=gc time stamp, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3459 "PTAMS=previous top-at-mark-start, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
3460 "NTAMS=next top-at-mark-start)"); |
| 342 | 3461 PrintRegionClosure blk(st); |
| 3766 | 3462 heap_region_iterate(&blk); |
| 342 | 3463 } |
| 3464 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3465 void G1CollectedHeap::print_on_error(outputStream* st) const { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3466 this->CollectedHeap::print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3467 |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3468 if (_cm != NULL) { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3469 st->cr(); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3470 _cm->print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3471 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3472 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3473 |
| 342 | 3474 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3475 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3476 workers()->print_worker_threads_on(st); |
| 3477 } | |
| 3478 _cmThread->print_on(st); | |
| 342 | 3479 st->cr(); |
| 1019 | 3480 _cm->print_worker_threads_on(st); |
| 3481 _cg1r->print_worker_threads_on(st); | |
| 17764 | 3482 if (G1StringDedup::is_enabled()) { |
| 3483 G1StringDedup::print_worker_threads_on(st); | |
| 3484 } | |
| 342 | 3485 } |
| 3486 | |
| 3487 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3488 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3489 workers()->threads_do(tc); |
| 3490 } | |
| 3491 tc->do_thread(_cmThread); | |
| 794 | 3492 _cg1r->threads_do(tc); |
| 17764 | 3493 if (G1StringDedup::is_enabled()) { |
| 3494 G1StringDedup::threads_do(tc); | |
| 3495 } | |
| 342 | 3496 } |
| 3497 | |
| 3498 void G1CollectedHeap::print_tracing_info() const { | |
| 3499 // We'll overload this to mean "trace GC pause statistics." | |
| 3500 if (TraceGen0Time || TraceGen1Time) { | |
| 3501 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3502 // to that. | |
| 3503 g1_policy()->print_tracing_info(); | |
| 3504 } | |
| 751 | 3505 if (G1SummarizeRSetStats) { |
| 342 | 3506 g1_rem_set()->print_summary_info(); |
| 3507 } | |
| 1282 | 3508 if (G1SummarizeConcMark) { |
| 342 | 3509 concurrent_mark()->print_summary_info(); |
| 3510 } | |
| 3511 g1_policy()->print_yg_surv_rate_info(); | |
| 3512 SpecializationStats::print(); | |
| 3513 } | |
| 3514 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3515 #ifndef PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3516 // Helpful for debugging RSet issues. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3517 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3518 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3519 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3520 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3521 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3522 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3523 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3524 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3525 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3526 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3527 _occupied_sum += occupied; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3528 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3529 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3530 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3531 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3532 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3533 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3534 hrrs->print(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3535 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3536 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3537 return false; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3538 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3539 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3540 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3541 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3542 gclog_or_tty->print_cr("========================================"); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3543 gclog_or_tty->print_cr("%s", msg); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3544 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3545 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3546 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3547 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3548 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3549 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3550 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3551 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3552 }; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3553 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3554 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3555 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3556 collection_set_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3557 } |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3558 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3559 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3560 PrintRSetsClosure cl("Printing All RSets");; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3561 heap_region_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3562 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3563 #endif // PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3564 |
| 342 | 3565 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3566 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3567 "not a garbage-first heap"); | |
| 3568 return _g1h; | |
| 3569 } | |
| 3570 | |
| 3571 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
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parents:
1166
diff
changeset
|
3572 // always_do_update_barrier = false; |
| 342 | 3573 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3574 // Fill TLAB's and such | |
| 17727 | 3575 accumulate_statistics_all_tlabs(); |
| 342 | 3576 ensure_parsability(true); |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3577 |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3578 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3579 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3580 g1_rem_set()->print_periodic_summary_info("Before GC RS summary"); |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3581 } |
| 342 | 3582 } |
| 3583 | |
| 3584 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3585 |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3586 if (G1SummarizeRSetStats && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3587 (G1SummarizeRSetStatsPeriod > 0) && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3588 // we are at the end of the GC. Total collections has already been increased. |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3589 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3590 g1_rem_set()->print_periodic_summary_info("After GC RS summary"); |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3591 } |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3592 |
| 342 | 3593 // FIXME: what is this about? |
| 3594 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3595 // is set. | |
| 3596 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3597 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3598 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3599 |
| 17727 | 3600 resize_all_tlabs(); |
| 3601 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3602 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3603 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3604 Universe::update_heap_info_at_gc(); |
| 342 | 3605 } |
| 3606 | |
| 1973 | 3607 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3608 unsigned int gc_count_before, | |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3609 bool* succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3610 GCCause::Cause gc_cause) { |
| 1973 | 3611 assert_heap_not_locked_and_not_at_safepoint(); |
| 342 | 3612 g1_policy()->record_stop_world_start(); |
| 1973 | 3613 VM_G1IncCollectionPause op(gc_count_before, |
| 3614 word_size, | |
| 3615 false, /* should_initiate_conc_mark */ | |
| 3616 g1_policy()->max_pause_time_ms(), | |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3617 gc_cause); |
| 1973 | 3618 VMThread::execute(&op); |
| 3619 | |
| 3620 HeapWord* result = op.result(); | |
| 3621 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3622 assert(result == NULL || ret_succeeded, | |
| 3623 "the result should be NULL if the VM did not succeed"); | |
| 3624 *succeeded = ret_succeeded; | |
| 3625 | |
| 3626 assert_heap_not_locked(); | |
| 3627 return result; | |
| 342 | 3628 } |
| 3629 | |
| 3630 void | |
| 3631 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3632 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3633 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3634 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3635 CGC_lock->notify(); |
| 342 | 3636 } |
| 3637 } | |
| 3638 | |
| 3639 size_t G1CollectedHeap::pending_card_num() { | |
| 3640 size_t extra_cards = 0; | |
| 3641 JavaThread *curr = Threads::first(); | |
| 3642 while (curr != NULL) { | |
| 3643 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3644 extra_cards += dcq.size(); | |
| 3645 curr = curr->next(); | |
| 3646 } | |
| 3647 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3648 size_t buffer_size = dcqs.buffer_size(); | |
| 3649 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3650 |
| 3651 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3652 // in bytes - not the number of 'entries'. We need to convert | |
| 3653 // into a number of cards. | |
| 3654 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3655 } |
| 3656 | |
| 3657 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3658 return g1_rem_set()->cardsScanned(); |
| 342 | 3659 } |
| 3660 | |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3661 bool G1CollectedHeap::humongous_region_is_always_live(uint index) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3662 HeapRegion* region = region_at(index); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3663 assert(region->startsHumongous(), "Must start a humongous object"); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3664 return oop(region->bottom())->is_objArray() || !region->rem_set()->is_empty(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3665 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3666 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3667 class RegisterHumongousWithInCSetFastTestClosure : public HeapRegionClosure { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3668 private: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3669 size_t _total_humongous; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3670 size_t _candidate_humongous; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3671 public: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3672 RegisterHumongousWithInCSetFastTestClosure() : _total_humongous(0), _candidate_humongous(0) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3673 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3674 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3675 virtual bool doHeapRegion(HeapRegion* r) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3676 if (!r->startsHumongous()) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3677 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3678 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3679 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3680 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3681 uint region_idx = r->hrm_index(); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3682 bool is_candidate = !g1h->humongous_region_is_always_live(region_idx); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3683 // Is_candidate already filters out humongous regions with some remembered set. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3684 // This will not lead to humongous object that we mistakenly keep alive because |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3685 // during young collection the remembered sets will only be added to. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3686 if (is_candidate) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3687 g1h->register_humongous_region_with_in_cset_fast_test(region_idx); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3688 _candidate_humongous++; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3689 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3690 _total_humongous++; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3691 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3692 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3693 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3694 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3695 size_t total_humongous() const { return _total_humongous; } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3696 size_t candidate_humongous() const { return _candidate_humongous; } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3697 }; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3698 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3699 void G1CollectedHeap::register_humongous_regions_with_in_cset_fast_test() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3700 if (!G1ReclaimDeadHumongousObjectsAtYoungGC) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3701 g1_policy()->phase_times()->record_fast_reclaim_humongous_stats(0, 0); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3702 return; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3703 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3704 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3705 RegisterHumongousWithInCSetFastTestClosure cl; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3706 heap_region_iterate(&cl); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3707 g1_policy()->phase_times()->record_fast_reclaim_humongous_stats(cl.total_humongous(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3708 cl.candidate_humongous()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3709 _has_humongous_reclaim_candidates = cl.candidate_humongous() > 0; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3710 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3711 if (_has_humongous_reclaim_candidates) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3712 clear_humongous_is_live_table(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3713 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3714 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3715 |
| 342 | 3716 void |
| 3717 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3718 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3719 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3720 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3721 if (_surviving_young_words == NULL) { |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3722 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
| 342 | 3723 "Not enough space for young surv words summary."); |
| 3724 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3725 memset(_surviving_young_words, 0, (size_t) array_length * sizeof(size_t)); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3726 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3727 for (uint i = 0; i < array_length; ++i) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3728 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3729 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3730 #endif // !ASSERT |
| 342 | 3731 } |
| 3732 | |
| 3733 void | |
| 3734 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3735 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3736 uint array_length = g1_policy()->young_cset_region_length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3737 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3738 _surviving_young_words[i] += surv_young_words[i]; |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3739 } |
| 342 | 3740 } |
| 3741 | |
| 3742 void | |
| 3743 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3744 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3745 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3746 _surviving_young_words = NULL; |
| 3747 } | |
| 3748 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3749 #ifdef ASSERT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3750 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3751 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3752 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3753 // Here we check that the CSet region's RSet is ready for parallel |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3754 // iteration. The fields that we'll verify are only manipulated |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3755 // when the region is part of a CSet and is collected. Afterwards, |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3756 // we reset these fields when we clear the region's RSet (when the |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3757 // region is freed) so they are ready when the region is |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3758 // re-allocated. The only exception to this is if there's an |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3759 // evacuation failure and instead of freeing the region we leave |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3760 // it in the heap. In that case, we reset these fields during |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3761 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3762 guarantee(hr->rem_set()->verify_ready_for_par_iteration(), "verification"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3763 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3764 // Here's a good place to add any other checks we'd like to |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3765 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3766 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3767 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3768 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3769 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3770 |
| 1709 | 3771 #if TASKQUEUE_STATS |
| 3772 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3773 st->print_raw_cr("GC Task Stats"); | |
| 3774 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3775 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3776 } | |
| 3777 | |
| 3778 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3779 print_taskqueue_stats_hdr(st); | |
| 3780 | |
| 3781 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3782 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3783 for (int i = 0; i < n; ++i) { |
| 3784 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3785 totals += task_queue(i)->stats; | |
| 3786 } | |
| 3787 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3788 | |
| 3789 DEBUG_ONLY(totals.verify()); | |
| 3790 } | |
| 3791 | |
| 3792 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3793 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3794 for (int i = 0; i < n; ++i) { |
| 3795 task_queue(i)->stats.reset(); | |
| 3796 } | |
| 3797 } | |
| 3798 #endif // TASKQUEUE_STATS | |
| 3799 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3800 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3801 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3802 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3803 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3804 |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3805 gclog_or_tty->gclog_stamp(_gc_tracer_stw->gc_id()); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3806 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3807 GCCauseString gc_cause_str = GCCauseString("GC pause", gc_cause()) |
|
7455
0b54ffe4c2d3
8005672: Clean up some changes to GC logging with GCCause's
jmasa
parents:
7397
diff
changeset
|
3808 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3809 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3810 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3811 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3812 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3813 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3814 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3815 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3816 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3817 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3818 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3819 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3820 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3821 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3822 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3823 gclog_or_tty->print_cr(", %3.7f secs]", pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3824 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3825 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3826 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3827 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3828 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3829 gclog_or_tty->print("--"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3830 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3831 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3832 gclog_or_tty->print_cr(", %3.7f secs]", pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3833 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3834 gclog_or_tty->flush(); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3835 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3836 |
| 1973 | 3837 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3838 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3839 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3840 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3841 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3842 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3843 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3844 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3845 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3846 _gc_timer_stw->register_gc_start(); |
| 10405 | 3847 |
| 3848 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
| 3849 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3850 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3851 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3852 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3853 print_heap_before_gc(); |
| 10405 | 3854 trace_heap_before_gc(_gc_tracer_stw); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3855 |
| 2152 | 3856 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3857 verify_dirty_young_regions(); |
| 2152 | 3858 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3859 // This call will decide whether this pause is an initial-mark |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3860 // pause. If it is, during_initial_mark_pause() will return true |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3861 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3862 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3863 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3864 // We do not allow initial-mark to be piggy-backed on a mixed GC. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3865 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3866 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3867 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3868 // We also do not allow mixed GCs during marking. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3869 assert(!mark_in_progress() || g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3870 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3871 // Record whether this pause is an initial mark. When the current |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3872 // thread has completed its logging output and it's safe to signal |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3873 // the CM thread, the flag's value in the policy has been reset. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3874 bool should_start_conc_mark = g1_policy()->during_initial_mark_pause(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3875 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3876 // Inner scope for scope based logging, timers, and stats collection |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3877 { |
| 10405 | 3878 EvacuationInfo evacuation_info; |
| 3879 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3880 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3881 // We are about to start a marking cycle, so we increment the |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3882 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3883 increment_old_marking_cycles_started(); |
| 10405 | 3884 register_concurrent_cycle_start(_gc_timer_stw->gc_start()); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3885 } |
| 10405 | 3886 |
| 3887 _gc_tracer_stw->report_yc_type(yc_type()); | |
| 3888 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3889 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3890 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3891 int active_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3892 workers()->active_workers() : 1); |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3893 double pause_start_sec = os::elapsedTime(); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3894 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3895 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3896 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3897 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3898 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3899 |
| 2361 | 3900 // If the secondary_free_list is not empty, append it to the |
| 3901 // free_list. No need to wait for the cleanup operation to finish; | |
| 3902 // the region allocation code will check the secondary_free_list | |
| 3903 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3904 // set, skip this step so that the region allocation code has to | |
| 3905 // get entries from the secondary_free_list. | |
| 2152 | 3906 if (!G1StressConcRegionFreeing) { |
| 2361 | 3907 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3908 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3909 |
| 12080 | 3910 assert(check_young_list_well_formed(), "young list should be well formed"); |
| 3911 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3912 "sanity check"); | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3913 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3914 // Don't dynamically change the number of GC threads this early. A value of |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3915 // 0 is used to indicate serial work. When parallel work is done, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3916 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3917 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3918 { // Call to jvmpi::post_class_unload_events must occur outside of active GC |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3919 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3920 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3921 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3922 increment_total_collections(false /* full gc */); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
3923 increment_gc_time_stamp(); |
| 342 | 3924 |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3925 verify_before_gc(); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
3926 check_bitmaps("GC Start"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3927 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3928 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3929 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3930 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3931 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3932 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3933 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3934 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3935 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3936 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3937 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3938 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3939 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3940 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3941 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3942 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3943 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3944 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3945 // Forget the current alloc region (we might even choose it to be part |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3946 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3947 release_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3948 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3949 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3950 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3951 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3952 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3953 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3954 // This timing is only used by the ergonomics to handle our pause target. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3955 // It is unclear why this should not include the full pause. We will |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3956 // investigate this in CR 7178365. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3957 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3958 // Preserving the old comment here if that helps the investigation: |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3959 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3960 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3961 // the possible verification above. |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3962 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3963 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3964 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3965 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3966 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3967 g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3968 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3969 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
3970 g1_policy()->record_collection_pause_start(sample_start_time_sec); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3971 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3972 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3973 // We have to wait until the CM threads finish scanning the |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3974 // root regions as it's the only way to ensure that all the |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3975 // objects on them have been correctly scanned before we start |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3976 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3977 bool waited = _cm->root_regions()->wait_until_scan_finished(); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3978 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3979 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3980 double scan_wait_end = os::elapsedTime(); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3981 wait_time_ms = (scan_wait_end - scan_wait_start) * 1000.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3982 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3983 g1_policy()->phase_times()->record_root_region_scan_wait_time(wait_time_ms); |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3984 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3985 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3986 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3987 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3988 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3989 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3990 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3991 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3992 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3993 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3994 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3995 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3996 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3998 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3999 |
| 10405 | 4000 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4001 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4002 register_humongous_regions_with_in_cset_fast_test(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4003 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4004 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4005 // We should not verify the per-thread SATB buffers given that |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4006 // we have not filtered them yet (we'll do so during the |
|
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
4007 // GC). We also call this after finalize_cset() to |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4008 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4009 _cm->verify_no_cset_oops(true /* verify_stacks */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4010 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4011 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4012 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4013 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4014 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4015 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4016 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4017 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4018 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4019 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4020 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4021 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4027 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4028 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4029 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4030 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4033 #endif // ASSERT |
| 1707 | 4034 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4035 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4036 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 // Initialize the GC alloc regions. |
| 10405 | 4038 init_gc_alloc_regions(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4039 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4040 // Actually do the work... |
| 10405 | 4041 evacuate_collection_set(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4043 // We do this to mainly verify the per-thread SATB buffers |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4044 // (which have been filtered by now) since we didn't verify |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4045 // them earlier. No point in re-checking the stacks / enqueued |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4046 // buffers given that the CSet has not changed since last time |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4047 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4048 _cm->verify_no_cset_oops(false /* verify_stacks */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4049 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4050 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4051 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4052 |
| 10405 | 4053 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4054 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4055 eagerly_reclaim_humongous_regions(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4056 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4057 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4058 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4059 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4060 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4061 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4062 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4063 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4065 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4066 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4067 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4068 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4069 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4070 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4071 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4072 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4073 "young list should be empty"); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4074 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4075 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4076 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4077 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4078 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4079 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4080 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
| 10405 | 4081 _young_list->first_survivor_region(), |
| 4082 _young_list->last_survivor_region()); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4087 _summary_bytes_used = recalculate_used(); |
| 10405 | 4088 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
| 4089 for (uint i = 0; i < n_queues; i++) { | |
| 4090 if (_evacuation_failed_info_array[i].has_failed()) { | |
| 4091 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
| 4092 } | |
| 4093 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4094 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4095 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4096 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4097 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4098 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4099 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4100 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4101 // We have to do this before we notify the CM threads that |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4102 // they can start working to make sure that all the |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4103 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4104 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4105 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4106 // Note that we don't actually trigger the CM thread at |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4107 // this point. We do that later when we're sure that |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4108 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4109 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4110 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4111 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4112 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4113 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4114 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4115 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4117 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4118 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4119 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4120 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4121 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 size_t bytes_before = capacity(); |
| 4785 | 4125 // No need for an ergo verbose message here, |
| 4126 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 if (!expand(expand_bytes)) { |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
4128 // We failed to expand the heap. Cannot do anything about it. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4130 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4131 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4132 |
| 10405 | 4133 // We redo the verification but now wrt to the new CSet which |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4134 // has just got initialized after the previous CSet was freed. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4135 _cm->verify_no_cset_oops(true /* verify_stacks */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4136 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4137 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4138 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4139 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4140 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4141 // This timing is only used by the ergonomics to handle our pause target. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4142 // It is unclear why this should not include the full pause. We will |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4143 // investigate this in CR 7178365. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4144 double sample_end_time_sec = os::elapsedTime(); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4145 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
| 10405 | 4146 g1_policy()->record_collection_pause_end(pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4147 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4148 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4149 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4150 // In prepare_for_verify() below we'll need to scan the deferred |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4151 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4152 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 // the update buffers we'll probably need to scan cards on the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4155 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4160 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 // on the region is current or not, by incrementing the GC time |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 // stamp here we invalidate all the GC time stamps on all the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4164 // all the regions. This is a nicer way of ensuring this rather |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4165 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4173 verify_after_gc(); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
4174 check_bitmaps("GC End"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4177 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4178 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4179 // CM reference discovery will be re-enabled if necessary. |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4180 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4181 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4182 // We should do this after we potentially expand the heap so |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4183 // that all the COMMIT events are generated before the end GC |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4184 // event, and after we retire the GC alloc regions so that all |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4185 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4186 _hr_printer.end_gc(false /* full */, (size_t) total_collections()); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4187 |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4188 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4189 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4190 #endif |
| 342 | 4191 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4192 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4193 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4194 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4195 // Print the remainder of the GC log output. |
|
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4196 log_gc_footer(os::elapsedTime() - pause_start_sec); |
|
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4197 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4198 // It is not yet to safe to tell the concurrent mark to |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4199 // start as we have some optional output below. We don't want the |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4200 // output from the concurrent mark thread interfering with this |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4201 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4202 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
4203 _hrm.verify_optional(); |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4204 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4205 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4206 TASKQUEUE_STATS_ONLY(if (ParallelGCVerbose) print_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4207 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4208 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4209 print_heap_after_gc(); |
| 10405 | 4210 trace_heap_after_gc(_gc_tracer_stw); |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4211 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4212 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4213 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4214 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4215 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4216 g1mm()->update_sizes(); |
| 10405 | 4217 |
| 4218 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
| 4219 _gc_tracer_stw->report_tenuring_threshold(_g1_policy->tenuring_threshold()); | |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
4220 _gc_timer_stw->register_gc_end(); |
| 10405 | 4221 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
| 4222 } | |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4223 // It should now be safe to tell the concurrent mark thread to start |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4224 // without its logging output interfering with the logging output |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4225 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4226 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4227 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4228 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4229 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4230 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4231 // this point does not assume that we are the only GC thread |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4232 // running. Note: of course, the actual marking work will |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4233 // not start until the safepoint itself is released in |
| 20192 | 4234 // SuspendibleThreadSet::desynchronize(). |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4235 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4236 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4237 |
| 1973 | 4238 return true; |
| 342 | 4239 } |
| 4240 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4241 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4242 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4243 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4244 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4245 case GCAllocForSurvived: |
| 6595 | 4246 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4247 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4248 case GCAllocForTenured: |
| 6595 | 4249 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4250 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4251 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4252 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4253 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4254 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4255 } |
| 6595 | 4256 |
| 4257 // Prevent humongous PLAB sizes for two reasons: | |
| 4258 // * PLABs are allocated using a similar paths as oops, but should | |
| 4259 // never be in a humongous region | |
| 4260 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4261 return MIN2(_humongous_object_threshold_in_words, gclab_word_size); | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4262 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4263 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4264 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4265 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4266 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4267 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4268 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4269 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4270 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4271 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4272 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4273 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4274 void G1CollectedHeap::use_retained_old_gc_alloc_region(EvacuationInfo& evacuation_info) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4275 HeapRegion* retained_region = _retained_old_gc_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4276 _retained_old_gc_alloc_region = NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4277 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4278 // We will discard the current GC alloc region if: |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4279 // a) it's in the collection set (it can happen!), |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4280 // b) it's already full (no point in using it), |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
4281 // c) it's empty (this means that it was emptied during |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
4282 // a cleanup and it should be on the free list now), or |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4283 // d) it's humongous (this means that it was emptied |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4284 // during a cleanup and was added to the free list, but |
| 10405 | 4285 // has been subsequently used to allocate a humongous |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
4286 // object that may be less than the region size). |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4287 if (retained_region != NULL && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4288 !retained_region->in_collection_set() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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diff
changeset
|
4289 !(retained_region->top() == retained_region->end()) && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4290 !retained_region->is_empty() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4291 !retained_region->isHumongous()) { |
|
20274
a8137787acfe
8047821: G1 Does not use the save_marks functionality as intended
mgerdin
parents:
20270
diff
changeset
|
4292 retained_region->record_top_and_timestamp(); |
| 4072 | 4293 // The retained region was added to the old region set when it was |
| 4294 // retired. We have to remove it now, since we don't allow regions | |
| 4295 // we allocate to in the region sets. We'll re-add it later, when | |
| 4296 // it's retired again. | |
| 4297 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4298 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4299 retained_region->note_start_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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diff
changeset
|
4300 _old_gc_alloc_region.set(retained_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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diff
changeset
|
4301 _hr_printer.reuse(retained_region); |
| 10405 | 4302 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
| 4303 } | |
| 4304 } | |
| 4305 | |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4306 void G1CollectedHeap::init_gc_alloc_regions(EvacuationInfo& evacuation_info) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4307 assert_at_safepoint(true /* should_be_vm_thread */); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4308 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4309 _survivor_gc_alloc_region.init(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4310 _old_gc_alloc_region.init(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4311 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4312 use_retained_old_gc_alloc_region(evacuation_info); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4313 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4314 |
| 10405 | 4315 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { |
| 4316 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
| 4317 _old_gc_alloc_region.count()); | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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changeset
|
4318 _survivor_gc_alloc_region.release(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4319 // If we have an old GC alloc region to release, we'll save it in |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4320 // _retained_old_gc_alloc_region. If we don't |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4321 // _retained_old_gc_alloc_region will become NULL. This is what we |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4322 // want either way so no reason to check explicitly for either |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4323 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4324 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 6595 | 4325 |
| 4326 if (ResizePLAB) { | |
| 6819 | 4327 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
| 4328 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
| 6595 | 4329 } |
| 342 | 4330 } |
| 4331 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4332 void G1CollectedHeap::abandon_gc_alloc_regions() { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4333 assert(_survivor_gc_alloc_region.get() == NULL, "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4334 assert(_old_gc_alloc_region.get() == NULL, "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4335 _retained_old_gc_alloc_region = NULL; |
| 342 | 4336 } |
| 4337 | |
| 4338 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4339 _drain_in_progress = false; | |
| 4340 set_evac_failure_closure(cl); | |
| 6197 | 4341 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4342 } |
| 4343 | |
| 4344 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4345 assert(_evac_failure_scan_stack != NULL && | |
| 4346 _evac_failure_scan_stack->length() == 0, | |
| 4347 "Postcondition"); | |
| 4348 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4349 delete _evac_failure_scan_stack; |
| 342 | 4350 _evac_failure_scan_stack = NULL; |
| 4351 } | |
| 4352 | |
| 4353 void G1CollectedHeap::remove_self_forwarding_pointers() { | |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4354 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4355 |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4356 double remove_self_forwards_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4357 |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4358 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4359 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4360 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4361 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4362 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4363 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4364 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4365 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4366 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4367 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4368 assert(check_cset_heap_region_claim_values(HeapRegion::ParEvacFailureClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4369 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4370 // Reset the claim values in the regions in the collection set. |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4371 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4372 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4373 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4374 |
| 4375 // Now restore saved marks, if any. | |
|
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4376 assert(_objs_with_preserved_marks.size() == |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4377 _preserved_marks_of_objs.size(), "Both or none."); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4378 while (!_objs_with_preserved_marks.is_empty()) { |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4379 oop obj = _objs_with_preserved_marks.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4380 markOop m = _preserved_marks_of_objs.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4381 obj->set_mark(m); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4382 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4383 _objs_with_preserved_marks.clear(true); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4384 _preserved_marks_of_objs.clear(true); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4385 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4386 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
| 342 | 4387 } |
| 4388 | |
| 4389 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4390 _evac_failure_scan_stack->push(obj); | |
| 4391 } | |
| 4392 | |
| 4393 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4394 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4395 | |
| 4396 while (_evac_failure_scan_stack->length() > 0) { | |
| 4397 oop obj = _evac_failure_scan_stack->pop(); | |
| 4398 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4399 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4400 } | |
| 4401 } | |
| 4402 | |
| 4403 oop | |
| 10405 | 4404 G1CollectedHeap::handle_evacuation_failure_par(G1ParScanThreadState* _par_scan_state, |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4405 oop old) { |
|
3323
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4406 assert(obj_in_cs(old), |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4407 err_msg("obj: "PTR_FORMAT" should still be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4408 (HeapWord*) old)); |
| 342 | 4409 markOop m = old->mark(); |
| 4410 oop forward_ptr = old->forward_to_atomic(old); | |
| 4411 if (forward_ptr == NULL) { | |
| 4412 // Forward-to-self succeeded. | |
| 10405 | 4413 assert(_par_scan_state != NULL, "par scan state"); |
| 4414 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
| 4415 uint queue_num = _par_scan_state->queue_num(); | |
| 4416 | |
| 4417 _evacuation_failed = true; | |
| 4418 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
| 342 | 4419 if (_evac_failure_closure != cl) { |
| 4420 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4421 assert(!_drain_in_progress, | |
| 4422 "Should only be true while someone holds the lock."); | |
| 4423 // Set the global evac-failure closure to the current thread's. | |
| 4424 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4425 set_evac_failure_closure(cl); | |
| 4426 // Now do the common part. | |
| 4427 handle_evacuation_failure_common(old, m); | |
| 4428 // Reset to NULL. | |
| 4429 set_evac_failure_closure(NULL); | |
| 4430 } else { | |
| 4431 // The lock is already held, and this is recursive. | |
| 4432 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4433 handle_evacuation_failure_common(old, m); | |
| 4434 } | |
| 4435 return old; | |
| 4436 } else { | |
|
3323
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4437 // Forward-to-self failed. Either someone else managed to allocate |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4438 // space for this object (old != forward_ptr) or they beat us in |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4439 // self-forwarding it (old == forward_ptr). |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4440 assert(old == forward_ptr || !obj_in_cs(forward_ptr), |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4441 err_msg("obj: "PTR_FORMAT" forwarded to: "PTR_FORMAT" " |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4442 "should not be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4443 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4444 return forward_ptr; |
| 4445 } | |
| 4446 } | |
| 4447 | |
| 4448 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4449 preserve_mark_if_necessary(old, m); | |
| 4450 | |
| 4451 HeapRegion* r = heap_region_containing(old); | |
| 4452 if (!r->evacuation_failed()) { | |
| 4453 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4454 _hr_printer.evac_failure(r); |
| 342 | 4455 } |
| 4456 | |
| 4457 push_on_evac_failure_scan_stack(old); | |
| 4458 | |
| 4459 if (!_drain_in_progress) { | |
| 4460 // prevent recursion in copy_to_survivor_space() | |
| 4461 _drain_in_progress = true; | |
| 4462 drain_evac_failure_scan_stack(); | |
| 4463 _drain_in_progress = false; | |
| 4464 } | |
| 4465 } | |
| 4466 | |
| 4467 void G1CollectedHeap::preserve_mark_if_necessary(oop obj, markOop m) { | |
|
2038
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4468 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4469 // We want to call the "for_promotion_failure" version only in the |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4470 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4471 if (m->must_be_preserved_for_promotion_failure(obj)) { |
|
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4472 _objs_with_preserved_marks.push(obj); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4473 _preserved_marks_of_objs.push(m); |
| 342 | 4474 } |
| 4475 } | |
| 4476 | |
| 4477 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4478 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4479 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4480 HeapWord* result = survivor_attempt_allocation(word_size); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4481 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4482 return result; |
| 342 | 4483 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4484 // Let's try to allocate in the old gen in case we can fit the |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4485 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4486 return old_attempt_allocation(word_size); |
| 342 | 4487 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4488 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4489 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4490 HeapWord* result = old_attempt_allocation(word_size); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4491 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4492 return result; |
| 342 | 4493 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4494 // Let's try to allocate in the survivors in case we can fit the |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4495 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4496 return survivor_attempt_allocation(word_size); |
| 342 | 4497 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4498 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4499 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4500 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4501 // Trying to keep some compilers happy. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4502 return NULL; |
| 342 | 4503 } |
| 4504 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4505 G1ParGCAllocBuffer::G1ParGCAllocBuffer(size_t gclab_word_size) : |
|
20215
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
4506 ParGCAllocBuffer(gclab_word_size), _retired(true) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4507 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4508 void G1ParCopyHelper::mark_object(oop obj) { |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4509 assert(!_g1->heap_region_containing(obj)->in_collection_set(), "should not mark objects in the CSet"); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4510 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4511 // We know that the object is not moving so it's safe to read its size. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4512 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4513 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4514 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4515 void G1ParCopyHelper::mark_forwarded_object(oop from_obj, oop to_obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4516 assert(from_obj->is_forwarded(), "from obj should be forwarded"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4517 assert(from_obj->forwardee() == to_obj, "to obj should be the forwardee"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4518 assert(from_obj != to_obj, "should not be self-forwarded"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4519 |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4520 assert(_g1->heap_region_containing(from_obj)->in_collection_set(), "from obj should be in the CSet"); |
|
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4521 assert(!_g1->heap_region_containing(to_obj)->in_collection_set(), "should not mark objects in the CSet"); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4522 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4523 // The object might be in the process of being copied by another |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4524 // worker so we cannot trust that its to-space image is |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4525 // well-formed. So we have to read its size from its from-space |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4526 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4527 _cm->grayRoot(to_obj, (size_t) from_obj->size(), _worker_id); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4528 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4529 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4530 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4531 void G1ParCopyHelper::do_klass_barrier(T* p, oop new_obj) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4532 if (_g1->heap_region_containing_raw(new_obj)->is_young()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4533 _scanned_klass->record_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4534 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4535 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4536 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4537 template <G1Barrier barrier, G1Mark do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4538 template <class T> |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4539 void G1ParCopyClosure<barrier, do_mark_object>::do_oop_work(T* p) { |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4540 T heap_oop = oopDesc::load_heap_oop(p); |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4541 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4542 if (oopDesc::is_null(heap_oop)) { |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4543 return; |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4544 } |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4545 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4546 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4547 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4548 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4549 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4550 G1CollectedHeap::in_cset_state_t state = _g1->in_cset_state(obj); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4551 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4552 if (state == G1CollectedHeap::InCSet) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4553 oop forwardee; |
| 526 | 4554 if (obj->is_forwarded()) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4555 forwardee = obj->forwardee(); |
| 526 | 4556 } else { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4557 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
| 342 | 4558 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4559 assert(forwardee != NULL, "forwardee should not be NULL"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4560 oopDesc::encode_store_heap_oop(p, forwardee); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4561 if (do_mark_object != G1MarkNone && forwardee != obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4562 // If the object is self-forwarded we don't need to explicitly |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4563 // mark it, the evacuation failure protocol will do so. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4564 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4565 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4566 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4567 if (barrier == G1BarrierKlass) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4568 do_klass_barrier(p, forwardee); |
| 342 | 4569 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4570 } else { |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4571 if (state == G1CollectedHeap::IsHumongous) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4572 _g1->set_humongous_is_live(obj); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4573 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4574 // The object is not in collection set. If we're a root scanning |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4575 // closure during an initial mark pause then attempt to mark the object. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4576 if (do_mark_object == G1MarkFromRoot) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4577 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4578 } |
| 526 | 4579 } |
| 4580 | |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4581 if (barrier == G1BarrierEvac) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4582 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4583 } |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4584 } |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4585 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4586 template void G1ParCopyClosure<G1BarrierEvac, G1MarkNone>::do_oop_work(oop* p); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4587 template void G1ParCopyClosure<G1BarrierEvac, G1MarkNone>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4588 |
| 342 | 4589 class G1ParEvacuateFollowersClosure : public VoidClosure { |
| 4590 protected: | |
| 4591 G1CollectedHeap* _g1h; | |
| 4592 G1ParScanThreadState* _par_scan_state; | |
| 4593 RefToScanQueueSet* _queues; | |
| 4594 ParallelTaskTerminator* _terminator; | |
| 4595 | |
| 4596 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4597 RefToScanQueueSet* queues() { return _queues; } | |
| 4598 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4599 | |
| 4600 public: | |
| 4601 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4602 G1ParScanThreadState* par_scan_state, | |
| 4603 RefToScanQueueSet* queues, | |
| 4604 ParallelTaskTerminator* terminator) | |
| 4605 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4606 _queues(queues), _terminator(terminator) {} | |
| 4607 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4608 void do_void(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4609 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4610 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4611 inline bool offer_termination(); |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
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|
4612 }; |
|
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|
4613 |
|
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diff
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|
4614 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
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diff
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|
4615 G1ParScanThreadState* const pss = par_scan_state(); |
|
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|
4616 pss->start_term_time(); |
|
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diff
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|
4617 const bool res = terminator()->offer_termination(); |
|
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|
4618 pss->end_term_time(); |
|
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diff
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|
4619 return res; |
|
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|
4620 } |
|
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|
4621 |
|
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|
4622 void G1ParEvacuateFollowersClosure::do_void() { |
|
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diff
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|
4623 G1ParScanThreadState* const pss = par_scan_state(); |
|
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|
4624 pss->trim_queue(); |
|
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diff
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|
4625 do { |
|
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|
4626 pss->steal_and_trim_queue(queues()); |
|
1862
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|
4627 } while (!offer_termination()); |
|
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|
4628 } |
| 342 | 4629 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4630 class G1KlassScanClosure : public KlassClosure { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4631 G1ParCopyHelper* _closure; |
|
da91efe96a93
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|
4632 bool _process_only_dirty; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4633 int _count; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4634 public: |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4635 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
|
da91efe96a93
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|
4636 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
|
da91efe96a93
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|
4637 void do_klass(Klass* klass) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4638 // If the klass has not been dirtied we know that there's |
|
da91efe96a93
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changeset
|
4639 // no references into the young gen and we can skip it. |
|
da91efe96a93
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diff
changeset
|
4640 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
da91efe96a93
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changeset
|
4641 // Clean the klass since we're going to scavenge all the metadata. |
|
da91efe96a93
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|
4642 klass->clear_modified_oops(); |
|
da91efe96a93
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|
4643 |
|
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changeset
|
4644 // Tell the closure that this klass is the Klass to scavenge |
|
da91efe96a93
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|
4645 // and is the one to dirty if oops are left pointing into the young gen. |
|
da91efe96a93
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changeset
|
4646 _closure->set_scanned_klass(klass); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4647 |
|
da91efe96a93
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changeset
|
4648 klass->oops_do(_closure); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4649 |
|
da91efe96a93
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changeset
|
4650 _closure->set_scanned_klass(NULL); |
|
da91efe96a93
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|
4651 } |
|
da91efe96a93
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changeset
|
4652 _count++; |
|
da91efe96a93
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changeset
|
4653 } |
|
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|
4654 }; |
|
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changeset
|
4655 |
| 342 | 4656 class G1ParTask : public AbstractGangTask { |
| 4657 protected: | |
| 4658 G1CollectedHeap* _g1h; | |
| 4659 RefToScanQueueSet *_queues; | |
| 4660 ParallelTaskTerminator _terminator; | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4661 uint _n_workers; |
| 342 | 4662 |
| 4663 Mutex _stats_lock; | |
| 4664 Mutex* stats_lock() { return &_stats_lock; } | |
| 4665 | |
| 4666 public: | |
|
20224
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8035401: Fix visibility of G1ParScanThreadState members
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changeset
|
4667 G1ParTask(G1CollectedHeap* g1h, RefToScanQueueSet *task_queues) |
| 342 | 4668 : AbstractGangTask("G1 collection"), |
| 4669 _g1h(g1h), | |
| 4670 _queues(task_queues), | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4671 _terminator(0, _queues), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4672 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4673 {} |
| 4674 | |
| 4675 RefToScanQueueSet* queues() { return _queues; } | |
| 4676 | |
| 4677 RefToScanQueue *work_queue(int i) { | |
| 4678 return queues()->queue(i); | |
| 4679 } | |
| 4680 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4681 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4682 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4683 virtual void set_for_termination(int active_workers) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4684 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4685 // in the young space (_par_seq_tasks) in the G1 heap |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4686 // for SequentialSubTasksDone. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4687 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4688 // both of which need setting by set_n_termination(). |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4689 _g1h->SharedHeap::set_n_termination(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4690 _g1h->set_n_termination(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4691 terminator()->reset_for_reuse(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4692 _n_workers = active_workers; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4693 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4694 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4695 // Helps out with CLD processing. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4696 // |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4697 // During InitialMark we need to: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4698 // 1) Scavenge all CLDs for the young GC. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4699 // 2) Mark all objects directly reachable from strong CLDs. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4700 template <G1Mark do_mark_object> |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4701 class G1CLDClosure : public CLDClosure { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4702 G1ParCopyClosure<G1BarrierNone, do_mark_object>* _oop_closure; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4703 G1ParCopyClosure<G1BarrierKlass, do_mark_object> _oop_in_klass_closure; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4704 G1KlassScanClosure _klass_in_cld_closure; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4705 bool _claim; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4706 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4707 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4708 G1CLDClosure(G1ParCopyClosure<G1BarrierNone, do_mark_object>* oop_closure, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4709 bool only_young, bool claim) |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4710 : _oop_closure(oop_closure), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4711 _oop_in_klass_closure(oop_closure->g1(), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4712 oop_closure->pss(), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4713 oop_closure->rp()), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4714 _klass_in_cld_closure(&_oop_in_klass_closure, only_young), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4715 _claim(claim) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4716 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4717 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4718 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4719 void do_cld(ClassLoaderData* cld) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4720 cld->oops_do(_oop_closure, &_klass_in_cld_closure, _claim); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4721 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4722 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4723 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4724 class G1CodeBlobClosure: public CodeBlobClosure { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4725 OopClosure* _f; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4726 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4727 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4728 G1CodeBlobClosure(OopClosure* f) : _f(f) {} |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4729 void do_code_blob(CodeBlob* blob) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4730 nmethod* that = blob->as_nmethod_or_null(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4731 if (that != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4732 if (!that->test_set_oops_do_mark()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4733 that->oops_do(_f); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4734 that->fix_oop_relocations(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4735 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4736 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4737 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4738 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4739 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4740 void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4741 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 4742 |
| 4743 double start_time_ms = os::elapsedTime() * 1000.0; | |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4744 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 4745 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4746 { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4747 ResourceMark rm; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4748 HandleMark hm; |
|
500023bd0818
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|
4749 |
|
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diff
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|
4750 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
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5963
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changeset
|
4751 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4752 G1ParScanThreadState pss(_g1h, worker_id, rp); |
|
5986
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parents:
5963
diff
changeset
|
4753 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
4754 |
|
5986
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7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4755 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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diff
changeset
|
4756 |
|
20278
2c6ef90f030a
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|
4757 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4758 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
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|
4759 // Non-IM young GC. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4760 G1ParCopyClosure<G1BarrierNone, G1MarkNone> scan_only_root_cl(_g1h, &pss, rp); |
|
2c6ef90f030a
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|
4761 G1CLDClosure<G1MarkNone> scan_only_cld_cl(&scan_only_root_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4762 only_young, // Only process dirty klasses. |
|
2c6ef90f030a
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|
4763 false); // No need to claim CLDs. |
|
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diff
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|
4764 // IM young GC. |
|
2c6ef90f030a
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diff
changeset
|
4765 // Strong roots closures. |
|
2c6ef90f030a
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changeset
|
4766 G1ParCopyClosure<G1BarrierNone, G1MarkFromRoot> scan_mark_root_cl(_g1h, &pss, rp); |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4767 G1CLDClosure<G1MarkFromRoot> scan_mark_cld_cl(&scan_mark_root_cl, |
|
2c6ef90f030a
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changeset
|
4768 false, // Process all klasses. |
|
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|
4769 true); // Need to claim CLDs. |
|
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|
4770 // Weak roots closures. |
|
2c6ef90f030a
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changeset
|
4771 G1ParCopyClosure<G1BarrierNone, G1MarkPromotedFromRoot> scan_mark_weak_root_cl(_g1h, &pss, rp); |
|
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|
4772 G1CLDClosure<G1MarkPromotedFromRoot> scan_mark_weak_cld_cl(&scan_mark_weak_root_cl, |
|
2c6ef90f030a
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|
4773 false, // Process all klasses. |
|
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|
4774 true); // Need to claim CLDs. |
|
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|
4775 |
|
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|
4776 G1CodeBlobClosure scan_only_code_cl(&scan_only_root_cl); |
|
2c6ef90f030a
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changeset
|
4777 G1CodeBlobClosure scan_mark_code_cl(&scan_mark_root_cl); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4778 // IM Weak code roots are handled later. |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
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|
4779 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4780 OopClosure* strong_root_cl; |
|
2c6ef90f030a
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changeset
|
4781 OopClosure* weak_root_cl; |
|
2c6ef90f030a
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changeset
|
4782 CLDClosure* strong_cld_cl; |
|
2c6ef90f030a
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changeset
|
4783 CLDClosure* weak_cld_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4784 CodeBlobClosure* strong_code_cl; |
|
5986
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5963
diff
changeset
|
4785 |
|
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diff
changeset
|
4786 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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5963
diff
changeset
|
4787 // We also need to mark copied objects. |
|
20278
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changeset
|
4788 strong_root_cl = &scan_mark_root_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4789 strong_cld_cl = &scan_mark_cld_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4790 strong_code_cl = &scan_mark_code_cl; |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
changeset
|
4791 if (ClassUnloadingWithConcurrentMark) { |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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20279
diff
changeset
|
4792 weak_root_cl = &scan_mark_weak_root_cl; |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
changeset
|
4793 weak_cld_cl = &scan_mark_weak_cld_cl; |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
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diff
changeset
|
4794 } else { |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
changeset
|
4795 weak_root_cl = &scan_mark_root_cl; |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
changeset
|
4796 weak_cld_cl = &scan_mark_cld_cl; |
|
f3aeae1f9fc5
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diff
changeset
|
4797 } |
|
20278
2c6ef90f030a
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diff
changeset
|
4798 } else { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4799 strong_root_cl = &scan_only_root_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4800 weak_root_cl = &scan_only_root_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4801 strong_cld_cl = &scan_only_cld_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4802 weak_cld_cl = &scan_only_cld_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4803 strong_code_cl = &scan_only_code_cl; |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4804 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4805 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4806 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4807 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4808 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4809 pss.start_strong_roots(); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4810 _g1h->g1_process_roots(strong_root_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4811 weak_root_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4812 &push_heap_rs_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4813 strong_cld_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4814 weak_cld_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4815 strong_code_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4816 worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4817 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4818 pss.end_strong_roots(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4819 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4820 { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4821 double start = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4822 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4823 evac.do_void(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4824 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4825 double term_ms = pss.term_time()*1000.0; |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4826 _g1h->g1_policy()->phase_times()->add_obj_copy_time(worker_id, elapsed_ms-term_ms); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4827 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4828 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4829 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4830 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4831 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4832 if (ParallelGCVerbose) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4833 MutexLocker x(stats_lock()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4834 pss.print_termination_stats(worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4835 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4836 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4837 assert(pss.queue_is_empty(), "should be empty"); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4838 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4839 // Close the inner scope so that the ResourceMark and HandleMark |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4840 // destructors are executed here and are included as part of the |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4841 // "GC Worker Time". |
| 342 | 4842 } |
| 4843 | |
| 1611 | 4844 double end_time_ms = os::elapsedTime() * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4845 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 4846 } |
| 4847 }; | |
| 4848 | |
| 4849 // *** Common G1 Evacuation Stuff | |
| 4850 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4851 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4852 |
| 342 | 4853 void |
| 4854 G1CollectedHeap:: | |
|
20278
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diff
changeset
|
4855 g1_process_roots(OopClosure* scan_non_heap_roots, |
|
2c6ef90f030a
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changeset
|
4856 OopClosure* scan_non_heap_weak_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4857 OopsInHeapRegionClosure* scan_rs, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4858 CLDClosure* scan_strong_clds, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4859 CLDClosure* scan_weak_clds, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4860 CodeBlobClosure* scan_strong_code, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4861 uint worker_i) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4862 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4863 // First scan the shared roots. |
| 342 | 4864 double ext_roots_start = os::elapsedTime(); |
| 4865 double closure_app_time_sec = 0.0; | |
| 4866 | |
|
20278
2c6ef90f030a
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diff
changeset
|
4867 bool during_im = _g1h->g1_policy()->during_initial_mark_pause(); |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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20279
diff
changeset
|
4868 bool trace_metadata = during_im && ClassUnloadingWithConcurrentMark; |
|
20278
2c6ef90f030a
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diff
changeset
|
4869 |
| 342 | 4870 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); |
|
20278
2c6ef90f030a
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20274
diff
changeset
|
4871 BufferingOopClosure buf_scan_non_heap_weak_roots(scan_non_heap_weak_roots); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4872 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4873 process_roots(false, // no scoping; this is parallel code |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4874 SharedHeap::SO_None, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4875 &buf_scan_non_heap_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4876 &buf_scan_non_heap_weak_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4877 scan_strong_clds, |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4878 // Unloading Initial Marks handle the weak CLDs separately. |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4879 (trace_metadata ? NULL : scan_weak_clds), |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4880 scan_strong_code); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4881 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4882 // Now the CM ref_processor roots. |
|
3823
14a2fd14c0db
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johnc
parents:
3778
diff
changeset
|
4883 if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4884 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4885 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4886 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4887 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4888 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
|
3823
14a2fd14c0db
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johnc
parents:
3778
diff
changeset
|
4889 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4890 |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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20279
diff
changeset
|
4891 if (trace_metadata) { |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4892 // Barrier to make sure all workers passed |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4893 // the strong CLD and strong nmethods phases. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4894 active_strong_roots_scope()->wait_until_all_workers_done_with_threads(n_par_threads()); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4895 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4896 // Now take the complement of the strong CLDs. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4897 ClassLoaderDataGraph::roots_cld_do(NULL, scan_weak_clds); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4898 } |
|
2c6ef90f030a
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parents:
20274
diff
changeset
|
4899 |
|
3823
14a2fd14c0db
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johnc
parents:
3778
diff
changeset
|
4900 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 4901 buf_scan_non_heap_roots.done(); |
|
20278
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diff
changeset
|
4902 buf_scan_non_heap_weak_roots.done(); |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4903 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4904 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds() |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4905 + buf_scan_non_heap_weak_roots.closure_app_seconds(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4906 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
4907 g1_policy()->phase_times()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
|
3823
14a2fd14c0db
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parents:
3778
diff
changeset
|
4908 |
| 342 | 4909 double ext_root_time_ms = |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4910 ((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
|
3823
14a2fd14c0db
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johnc
parents:
3778
diff
changeset
|
4911 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
4912 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 4913 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4914 // During conc marking we have to filter the per-thread SATB buffers |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4915 // to make sure we remove any oops into the CSet (which will show up |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4916 // as implicitly live). |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4917 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4918 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4919 if (mark_in_progress()) { |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4920 double satb_filter_start = os::elapsedTime(); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4921 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4922 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4923 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4924 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4925 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4926 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4927 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 4928 |
| 4929 // Now scan the complement of the collection set. | |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4930 MarkingCodeBlobClosure scavenge_cs_nmethods(scan_non_heap_weak_roots, CodeBlobToOopClosure::FixRelocations); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4931 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4932 g1_rem_set()->oops_into_collection_set_do(scan_rs, &scavenge_cs_nmethods, worker_i); |
|
20256
b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
stefank
parents:
20254
diff
changeset
|
4933 |
| 342 | 4934 _process_strong_tasks->all_tasks_completed(); |
| 4935 } | |
| 4936 | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4937 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4938 private: |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4939 BoolObjectClosure* _is_alive; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4940 int _initial_string_table_size; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4941 int _initial_symbol_table_size; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4942 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4943 bool _process_strings; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4944 int _strings_processed; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4945 int _strings_removed; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4946 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4947 bool _process_symbols; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4948 int _symbols_processed; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4949 int _symbols_removed; |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4950 |
|
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4951 bool _do_in_parallel; |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4952 public: |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4953 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4954 AbstractGangTask("String/Symbol Unlinking"), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4955 _is_alive(is_alive), |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4956 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4957 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4958 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4959 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4960 _initial_string_table_size = StringTable::the_table()->table_size(); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4961 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4962 if (process_strings) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4963 StringTable::clear_parallel_claimed_index(); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4964 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4965 if (process_symbols) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4966 SymbolTable::clear_parallel_claimed_index(); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4967 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4968 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4969 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4970 ~G1StringSymbolTableUnlinkTask() { |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4971 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4972 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4973 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4974 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4975 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4976 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4977 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4978 if (G1TraceStringSymbolTableScrubbing) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4979 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4980 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4981 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4982 strings_processed(), strings_removed(), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4983 symbols_processed(), symbols_removed()); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4984 } |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4985 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4986 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4987 void work(uint worker_id) { |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4988 if (_do_in_parallel) { |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4989 int strings_processed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4990 int strings_removed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4991 int symbols_processed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4992 int symbols_removed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
4993 if (_process_strings) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
4994 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
4995 Atomic::add(strings_processed, &_strings_processed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
4996 Atomic::add(strings_removed, &_strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4997 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4998 if (_process_symbols) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4999 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5000 Atomic::add(symbols_processed, &_symbols_processed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
5001 Atomic::add(symbols_removed, &_symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5002 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5003 } else { |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
5004 if (_process_strings) { |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
5005 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
5006 } |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
5007 if (_process_symbols) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5008 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5009 } |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
5010 } |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
5011 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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parents:
13400
diff
changeset
|
5012 |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
5013 size_t strings_processed() const { return (size_t)_strings_processed; } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5014 size_t strings_removed() const { return (size_t)_strings_removed; } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5015 |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
5016 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
|
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8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5017 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
5018 }; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5019 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5020 class G1CodeCacheUnloadingTask VALUE_OBJ_CLASS_SPEC { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5021 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5022 static Monitor* _lock; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5023 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5024 BoolObjectClosure* const _is_alive; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5025 const bool _unloading_occurred; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5026 const uint _num_workers; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5027 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5028 // Variables used to claim nmethods. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5029 nmethod* _first_nmethod; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5030 volatile nmethod* _claimed_nmethod; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5031 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5032 // The list of nmethods that need to be processed by the second pass. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5033 volatile nmethod* _postponed_list; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5034 volatile uint _num_entered_barrier; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5035 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5036 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5037 G1CodeCacheUnloadingTask(uint num_workers, BoolObjectClosure* is_alive, bool unloading_occurred) : |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5038 _is_alive(is_alive), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5039 _unloading_occurred(unloading_occurred), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5040 _num_workers(num_workers), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5041 _first_nmethod(NULL), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5042 _claimed_nmethod(NULL), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5043 _postponed_list(NULL), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5044 _num_entered_barrier(0) |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5045 { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5046 nmethod::increase_unloading_clock(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5047 _first_nmethod = CodeCache::alive_nmethod(CodeCache::first()); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5048 _claimed_nmethod = (volatile nmethod*)_first_nmethod; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5049 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5050 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5051 ~G1CodeCacheUnloadingTask() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5052 CodeCache::verify_clean_inline_caches(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5053 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5054 CodeCache::set_needs_cache_clean(false); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5055 guarantee(CodeCache::scavenge_root_nmethods() == NULL, "Must be"); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5056 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5057 CodeCache::verify_icholder_relocations(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5058 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5059 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5060 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5061 void add_to_postponed_list(nmethod* nm) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5062 nmethod* old; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5063 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5064 old = (nmethod*)_postponed_list; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5065 nm->set_unloading_next(old); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5066 } while ((nmethod*)Atomic::cmpxchg_ptr(nm, &_postponed_list, old) != old); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5067 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5068 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5069 void clean_nmethod(nmethod* nm) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5070 bool postponed = nm->do_unloading_parallel(_is_alive, _unloading_occurred); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5071 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5072 if (postponed) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5073 // This nmethod referred to an nmethod that has not been cleaned/unloaded yet. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5074 add_to_postponed_list(nm); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5075 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5076 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5077 // Mark that this thread has been cleaned/unloaded. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5078 // After this call, it will be safe to ask if this nmethod was unloaded or not. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5079 nm->set_unloading_clock(nmethod::global_unloading_clock()); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5080 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5081 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5082 void clean_nmethod_postponed(nmethod* nm) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5083 nm->do_unloading_parallel_postponed(_is_alive, _unloading_occurred); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5084 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5085 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5086 static const int MaxClaimNmethods = 16; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5087 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5088 void claim_nmethods(nmethod** claimed_nmethods, int *num_claimed_nmethods) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5089 nmethod* first; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5090 nmethod* last; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5091 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5092 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5093 *num_claimed_nmethods = 0; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5094 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5095 first = last = (nmethod*)_claimed_nmethod; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5096 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5097 if (first != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5098 for (int i = 0; i < MaxClaimNmethods; i++) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5099 last = CodeCache::alive_nmethod(CodeCache::next(last)); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5100 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5101 if (last == NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5102 break; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5103 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5104 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5105 claimed_nmethods[i] = last; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5106 (*num_claimed_nmethods)++; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5107 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5108 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5109 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5110 } while ((nmethod*)Atomic::cmpxchg_ptr(last, &_claimed_nmethod, first) != first); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5111 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5112 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5113 nmethod* claim_postponed_nmethod() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5114 nmethod* claim; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5115 nmethod* next; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5116 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5117 do { |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5118 claim = (nmethod*)_postponed_list; |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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changeset
|
5119 if (claim == NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5120 return NULL; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5121 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5122 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5123 next = claim->unloading_next(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5124 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5125 } while ((nmethod*)Atomic::cmpxchg_ptr(next, &_postponed_list, claim) != claim); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5126 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5127 return claim; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5128 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5129 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5130 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5131 // Mark that we're done with the first pass of nmethod cleaning. |
|
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changeset
|
5132 void barrier_mark(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5133 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5134 _num_entered_barrier++; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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changeset
|
5135 if (_num_entered_barrier == _num_workers) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5136 ml.notify_all(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5137 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5138 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5139 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5140 // See if we have to wait for the other workers to |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5141 // finish their first-pass nmethod cleaning work. |
|
2c6ef90f030a
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changeset
|
5142 void barrier_wait(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5143 if (_num_entered_barrier < _num_workers) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5144 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
5145 while (_num_entered_barrier < _num_workers) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5146 ml.wait(Mutex::_no_safepoint_check_flag, 0, false); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
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|
5147 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5148 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5149 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5150 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5151 // Cleaning and unloading of nmethods. Some work has to be postponed |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5152 // to the second pass, when we know which nmethods survive. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5153 void work_first_pass(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5154 // The first nmethods is claimed by the first worker. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5155 if (worker_id == 0 && _first_nmethod != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5156 clean_nmethod(_first_nmethod); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5157 _first_nmethod = NULL; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5158 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5159 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5160 int num_claimed_nmethods; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5161 nmethod* claimed_nmethods[MaxClaimNmethods]; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5162 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5163 while (true) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5164 claim_nmethods(claimed_nmethods, &num_claimed_nmethods); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5165 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5166 if (num_claimed_nmethods == 0) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5167 break; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5168 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5169 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5170 for (int i = 0; i < num_claimed_nmethods; i++) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5171 clean_nmethod(claimed_nmethods[i]); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5172 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5173 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5174 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5175 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5176 void work_second_pass(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5177 nmethod* nm; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5178 // Take care of postponed nmethods. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5179 while ((nm = claim_postponed_nmethod()) != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5180 clean_nmethod_postponed(nm); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5181 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5182 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5183 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5184 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5185 Monitor* G1CodeCacheUnloadingTask::_lock = new Monitor(Mutex::leaf, "Code Cache Unload lock"); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5186 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5187 class G1KlassCleaningTask : public StackObj { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5188 BoolObjectClosure* _is_alive; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5189 volatile jint _clean_klass_tree_claimed; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5190 ClassLoaderDataGraphKlassIteratorAtomic _klass_iterator; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5191 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5192 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5193 G1KlassCleaningTask(BoolObjectClosure* is_alive) : |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5194 _is_alive(is_alive), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5195 _clean_klass_tree_claimed(0), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5196 _klass_iterator() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5197 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5198 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5199 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5200 bool claim_clean_klass_tree_task() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5201 if (_clean_klass_tree_claimed) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5202 return false; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5203 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5204 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5205 return Atomic::cmpxchg(1, (jint*)&_clean_klass_tree_claimed, 0) == 0; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5206 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5207 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5208 InstanceKlass* claim_next_klass() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5209 Klass* klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5210 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5211 klass =_klass_iterator.next_klass(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5212 } while (klass != NULL && !klass->oop_is_instance()); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5213 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5214 return (InstanceKlass*)klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5215 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5216 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5217 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5218 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5219 void clean_klass(InstanceKlass* ik) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5220 ik->clean_implementors_list(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5221 ik->clean_method_data(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5222 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5223 // G1 specific cleanup work that has |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5224 // been moved here to be done in parallel. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5225 ik->clean_dependent_nmethods(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5226 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5227 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5228 void work() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5229 ResourceMark rm; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5230 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5231 // One worker will clean the subklass/sibling klass tree. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5232 if (claim_clean_klass_tree_task()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5233 Klass::clean_subklass_tree(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5234 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5235 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5236 // All workers will help cleaning the classes, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5237 InstanceKlass* klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5238 while ((klass = claim_next_klass()) != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5239 clean_klass(klass); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5240 } |
|
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|
5241 } |
|
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|
5242 }; |
|
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|
5243 |
|
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|
5244 // To minimize the remark pause times, the tasks below are done in parallel. |
|
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|
5245 class G1ParallelCleaningTask : public AbstractGangTask { |
|
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|
5246 private: |
|
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diff
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|
5247 G1StringSymbolTableUnlinkTask _string_symbol_task; |
|
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|
5248 G1CodeCacheUnloadingTask _code_cache_task; |
|
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|
5249 G1KlassCleaningTask _klass_cleaning_task; |
|
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|
5250 |
|
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|
5251 public: |
|
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|
5252 // The constructor is run in the VMThread. |
|
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|
5253 G1ParallelCleaningTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols, uint num_workers, bool unloading_occurred) : |
|
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|
5254 AbstractGangTask("Parallel Cleaning"), |
|
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|
5255 _string_symbol_task(is_alive, process_strings, process_symbols), |
|
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|
5256 _code_cache_task(num_workers, is_alive, unloading_occurred), |
|
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|
5257 _klass_cleaning_task(is_alive) { |
|
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|
5258 } |
|
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changeset
|
5259 |
|
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|
5260 // The parallel work done by all worker threads. |
|
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|
5261 void work(uint worker_id) { |
|
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|
5262 // Do first pass of code cache cleaning. |
|
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|
5263 _code_cache_task.work_first_pass(worker_id); |
|
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|
5264 |
| 20279 | 5265 // Let the threads mark that the first pass is done. |
|
20278
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|
5266 _code_cache_task.barrier_mark(worker_id); |
|
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|
5267 |
|
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|
5268 // Clean the Strings and Symbols. |
|
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|
5269 _string_symbol_task.work(worker_id); |
|
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|
5270 |
|
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|
5271 // Wait for all workers to finish the first code cache cleaning pass. |
|
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|
5272 _code_cache_task.barrier_wait(worker_id); |
|
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|
5273 |
|
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|
5274 // Do the second code cache cleaning work, which realize on |
|
2c6ef90f030a
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|
5275 // the liveness information gathered during the first pass. |
|
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|
5276 _code_cache_task.work_second_pass(worker_id); |
|
2c6ef90f030a
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changeset
|
5277 |
|
2c6ef90f030a
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diff
changeset
|
5278 // Clean all klasses that were not unloaded. |
|
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changeset
|
5279 _klass_cleaning_task.work(); |
|
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|
5280 } |
|
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|
5281 }; |
|
2c6ef90f030a
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diff
changeset
|
5282 |
|
2c6ef90f030a
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changeset
|
5283 |
|
2c6ef90f030a
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|
5284 void G1CollectedHeap::parallel_cleaning(BoolObjectClosure* is_alive, |
|
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|
5285 bool process_strings, |
|
2c6ef90f030a
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diff
changeset
|
5286 bool process_symbols, |
|
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changeset
|
5287 bool class_unloading_occurred) { |
|
17634
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changeset
|
5288 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
20278
2c6ef90f030a
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|
5289 workers()->active_workers() : 1); |
|
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diff
changeset
|
5290 |
|
2c6ef90f030a
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diff
changeset
|
5291 G1ParallelCleaningTask g1_unlink_task(is_alive, process_strings, process_symbols, |
|
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changeset
|
5292 n_workers, class_unloading_occurred); |
|
17634
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|
5293 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
5294 set_par_threads(n_workers); |
|
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diff
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|
5295 workers()->run_task(&g1_unlink_task); |
|
5a32d2a3cc1e
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changeset
|
5296 set_par_threads(0); |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5297 } else { |
|
5a32d2a3cc1e
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diff
changeset
|
5298 g1_unlink_task.work(0); |
|
5a32d2a3cc1e
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tschatzl
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changeset
|
5299 } |
|
20278
2c6ef90f030a
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diff
changeset
|
5300 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5301 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5302 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
|
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changeset
|
5303 bool process_strings, bool process_symbols) { |
|
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stefank
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diff
changeset
|
5304 { |
|
2c6ef90f030a
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diff
changeset
|
5305 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
2c6ef90f030a
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stefank
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changeset
|
5306 _g1h->workers()->active_workers() : 1); |
|
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stefank
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changeset
|
5307 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
|
2c6ef90f030a
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changeset
|
5308 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
2c6ef90f030a
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changeset
|
5309 set_par_threads(n_workers); |
|
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diff
changeset
|
5310 workers()->run_task(&g1_unlink_task); |
|
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diff
changeset
|
5311 set_par_threads(0); |
|
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stefank
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diff
changeset
|
5312 } else { |
|
2c6ef90f030a
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diff
changeset
|
5313 g1_unlink_task.work(0); |
|
2c6ef90f030a
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diff
changeset
|
5314 } |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5315 } |
| 17764 | 5316 |
| 5317 if (G1StringDedup::is_enabled()) { | |
| 5318 G1StringDedup::unlink(is_alive); | |
| 5319 } | |
|
17634
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5320 } |
|
5a32d2a3cc1e
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13400
diff
changeset
|
5321 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5322 class G1RedirtyLoggedCardsTask : public AbstractGangTask { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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diff
changeset
|
5323 private: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5324 DirtyCardQueueSet* _queue; |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5325 public: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5326 G1RedirtyLoggedCardsTask(DirtyCardQueueSet* queue) : AbstractGangTask("Redirty Cards"), _queue(queue) { } |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5327 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5328 virtual void work(uint worker_id) { |
|
570cb6369f17
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tschatzl
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20215
diff
changeset
|
5329 double start_time = os::elapsedTime(); |
|
570cb6369f17
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tschatzl
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20215
diff
changeset
|
5330 |
|
20217
6b52700a896b
8040002: Clean up code and code duplication in re-diryting cards for verification
tschatzl
parents:
20216
diff
changeset
|
5331 RedirtyLoggedCardTableEntryClosure cl; |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5332 if (G1CollectedHeap::heap()->use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5333 _queue->par_apply_closure_to_all_completed_buffers(&cl); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5334 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5335 _queue->apply_closure_to_all_completed_buffers(&cl); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5336 } |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5337 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5338 G1GCPhaseTimes* timer = G1CollectedHeap::heap()->g1_policy()->phase_times(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5339 timer->record_redirty_logged_cards_time_ms(worker_id, (os::elapsedTime() - start_time) * 1000.0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5340 timer->record_redirty_logged_cards_processed_cards(worker_id, cl.num_processed()); |
|
570cb6369f17
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tschatzl
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20215
diff
changeset
|
5341 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
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17755
diff
changeset
|
5342 }; |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5343 |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5344 void G1CollectedHeap::redirty_logged_cards() { |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5345 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5346 double redirty_logged_cards_start = os::elapsedTime(); |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5347 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5348 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5349 _g1h->workers()->active_workers() : 1); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5350 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5351 G1RedirtyLoggedCardsTask redirty_task(&dirty_card_queue_set()); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5352 dirty_card_queue_set().reset_for_par_iteration(); |
|
570cb6369f17
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tschatzl
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20215
diff
changeset
|
5353 if (use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5354 set_par_threads(n_workers); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5355 workers()->run_task(&redirty_task); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5356 set_par_threads(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5357 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5358 redirty_task.work(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5359 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5360 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5361 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5362 dcq.merge_bufferlists(&dirty_card_queue_set()); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5363 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5364 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5365 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5366 } |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5367 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5368 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5369 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5372 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5373 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5374 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5375 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5377 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5378 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5379 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5380 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5381 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5382 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5383 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5385 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5386 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5387 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5388 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5391 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5394 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5396 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5398 void do_oop(oop* p) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5399 oop obj = *p; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5400 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5401 G1CollectedHeap::in_cset_state_t cset_state = _g1->in_cset_state(obj); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5402 if (obj == NULL || cset_state == G1CollectedHeap::InNeither) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5403 return; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5404 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5405 if (cset_state == G1CollectedHeap::InCSet) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5406 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5407 *p = obj->forwardee(); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5408 } else { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5409 assert(!obj->is_forwarded(), "invariant" ); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5410 assert(cset_state == G1CollectedHeap::IsHumongous, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5411 err_msg("Only allowed InCSet state is IsHumongous, but is %d", cset_state)); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5412 _g1->set_humongous_is_live(obj); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5413 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5414 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5415 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5416 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5417 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5418 // serial and parallel code as long as different worker |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5419 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5420 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5421 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5422 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5424 OopClosure* _copy_non_heap_obj_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5425 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5426 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5427 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5428 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5429 OopClosure* non_heap_obj_cl, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5430 G1ParScanThreadState* pss): |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5431 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5432 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5433 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5434 {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5435 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5436 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5437 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5438 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5439 template <class T> void do_oop_work(T* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5440 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5442 if (_g1h->is_in_cset_or_humongous(obj)) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5443 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5444 // to a new location or to itself in the event of an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 // heap, update the RSet for the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5448 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 // If the referent has not been forwarded then we have to keep |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5450 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5451 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5452 // If the reference field is in the G1 heap then we can push |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5453 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5455 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5456 // new location, and the RSet updated. Otherwise we need to |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5457 // use the the non-heap or metadata closures directly to copy |
| 10405 | 5458 // the referent object and update the pointer, while avoiding |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5459 // updating the RSet. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5460 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5461 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5462 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5463 } else { |
|
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17866
diff
changeset
|
5464 assert(!Metaspace::contains((const void*)p), |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5465 err_msg("Unexpectedly found a pointer from metadata: " |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5466 PTR_FORMAT, p)); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5467 _copy_non_heap_obj_cl->do_oop(p); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5468 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5469 } |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5470 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5471 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5472 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5473 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5474 // closure for each discovered list in some of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5475 // reference processing phases. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5476 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5477 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5478 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5479 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5480 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5481 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5482 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5483 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5484 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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|
5485 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
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|
5486 _g1h(g1h), |
|
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|
5487 _par_scan_state(pss) |
|
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|
5488 { } |
|
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diff
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|
5489 |
|
4dfb2df418f2
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changeset
|
5490 void do_void() { |
|
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|
5491 G1ParScanThreadState* const pss = par_scan_state(); |
|
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|
5492 pss->trim_queue(); |
|
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|
5493 } |
|
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|
5494 }; |
|
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changeset
|
5495 |
|
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|
5496 // Parallel Reference Processing closures |
|
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|
5497 |
|
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|
5498 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
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|
5499 // processing during G1 evacuation pauses. |
|
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changeset
|
5500 |
|
4dfb2df418f2
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|
5501 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
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|
5502 private: |
|
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|
5503 G1CollectedHeap* _g1h; |
|
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|
5504 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
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|
5505 FlexibleWorkGang* _workers; |
|
3979
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|
5506 int _active_workers; |
|
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|
5507 |
|
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|
5508 public: |
|
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|
5509 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
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|
5510 FlexibleWorkGang* workers, |
|
3979
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|
5511 RefToScanQueueSet *task_queues, |
|
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|
5512 int n_workers) : |
|
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|
5513 _g1h(g1h), |
|
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|
5514 _queues(task_queues), |
|
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|
5515 _workers(workers), |
|
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|
5516 _active_workers(n_workers) |
|
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|
5517 { |
|
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|
5518 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
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|
5519 } |
|
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changeset
|
5520 |
|
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|
5521 // Executes the given task using concurrent marking worker threads. |
|
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|
5522 virtual void execute(ProcessTask& task); |
|
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|
5523 virtual void execute(EnqueueTask& task); |
|
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|
5524 }; |
|
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changeset
|
5525 |
|
4dfb2df418f2
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changeset
|
5526 // Gang task for possibly parallel reference processing |
|
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changeset
|
5527 |
|
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|
5528 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
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|
5529 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
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|
5530 ProcessTask& _proc_task; |
|
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|
5531 G1CollectedHeap* _g1h; |
|
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|
5532 RefToScanQueueSet *_task_queues; |
|
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|
5533 ParallelTaskTerminator* _terminator; |
|
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|
5534 |
|
4dfb2df418f2
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|
5535 public: |
|
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diff
changeset
|
5536 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
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|
5537 G1CollectedHeap* g1h, |
|
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|
5538 RefToScanQueueSet *task_queues, |
|
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|
5539 ParallelTaskTerminator* terminator) : |
|
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|
5540 AbstractGangTask("Process reference objects in parallel"), |
|
4dfb2df418f2
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diff
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|
5541 _proc_task(proc_task), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5542 _g1h(g1h), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5543 _task_queues(task_queues), |
|
4dfb2df418f2
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diff
changeset
|
5544 _terminator(terminator) |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5545 {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5546 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5547 virtual void work(uint worker_id) { |
|
3979
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parents:
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diff
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|
5548 // The reference processing task executed by a single worker. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5549 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5550 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5551 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5552 G1STWIsAliveClosure is_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5553 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5554 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5555 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5556 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5557 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5558 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5559 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5560 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5561 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5562 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5563 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5564 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5565 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5566 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5567 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5568 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5569 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5570 // Keep alive closure. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5571 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5572 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5573 // Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5574 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
4dfb2df418f2
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diff
changeset
|
5575 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5576 // Call the reference processing task's work routine. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5577 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5578 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5579 // Note we cannot assert that the refs array is empty here as not all |
|
4dfb2df418f2
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diff
changeset
|
5580 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
4dfb2df418f2
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diff
changeset
|
5581 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5582 // the queue may not be empty. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5583 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5584 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5585 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5586 // Driver routine for parallel reference processing. |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5587 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5588 // task and has the worker threads execute it. |
|
4dfb2df418f2
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diff
changeset
|
5589 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5590 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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diff
changeset
|
5591 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5592 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
4dfb2df418f2
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diff
changeset
|
5593 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
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diff
changeset
|
5594 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5595 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5596 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5597 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5598 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5599 |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5600 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5601 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5602 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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diff
changeset
|
5603 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
4dfb2df418f2
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diff
changeset
|
5604 EnqueueTask& _enq_task; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5605 |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5606 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5607 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5608 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5609 _enq_task(enq_task) |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5610 { } |
|
4dfb2df418f2
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diff
changeset
|
5611 |
|
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|
5612 virtual void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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|
5613 _enq_task.work(worker_id); |
|
3979
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parents:
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|
5614 } |
|
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|
5615 }; |
|
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diff
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|
5616 |
| 10405 | 5617 // Driver routine for parallel reference enqueueing. |
|
3979
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|
5618 // Creates an instance of the ref enqueueing gang |
|
4dfb2df418f2
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|
5619 // task and has the worker threads execute it. |
|
4dfb2df418f2
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changeset
|
5620 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5621 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
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|
5622 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
5623 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5624 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5625 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5626 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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|
5627 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5628 _g1h->set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5629 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5630 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5631 // End of weak reference support closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5632 |
|
4dfb2df418f2
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diff
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|
5633 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
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|
5634 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5635 // objects discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5636 |
|
4dfb2df418f2
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parents:
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|
5637 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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|
5638 protected: |
|
4dfb2df418f2
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|
5639 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5640 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
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|
5641 ParallelTaskTerminator _terminator; |
|
4728
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|
5642 uint _n_workers; |
|
3979
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|
5643 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
5644 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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|
5645 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
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parents:
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changeset
|
5646 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5647 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5648 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5649 _terminator(workers, _queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5650 _n_workers(workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5651 { } |
|
4dfb2df418f2
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diff
changeset
|
5652 |
|
4728
441e946dc1af
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jmasa
parents:
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diff
changeset
|
5653 void work(uint worker_id) { |
|
3979
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5654 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5655 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5656 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5657 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5658 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5659 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5660 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5661 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5662 assert(pss.queue_is_empty(), "both queue and overflow should be empty"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5663 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5664 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5665 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5666 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5667 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5668 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5669 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5671 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5672 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5673 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5674 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5675 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5676 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5677 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5678 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5679 // to be copied. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5680 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5681 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5682 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5683 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5684 uint limit = ReferenceProcessor::number_of_subclasses_of_ref() * rp->max_num_q(); |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5685 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5686 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5687 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5688 // So this must be true - but assert just in case someone decides to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5689 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5690 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5691 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5693 // Select discovered lists [i, i+stride, i+2*stride,...,limit) |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5694 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5695 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5696 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5697 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5698 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5699 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5700 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5701 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5710 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5711 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5712 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5713 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5714 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5715 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5716 assert(pss.queue_is_empty(), "should be"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5717 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5718 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5719 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5721 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 double ref_proc_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5727 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5728 // by the CM ref processor should have already been copied (either by |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5729 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5730 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5731 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5732 // But some of the referents, that are in the collection set, that these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 // reference objects point to may not have been copied: the STW ref |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5735 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5736 // but would not have treated the reference object as a regular oop. |
| 10405 | 5737 // As a result the copy closure would not have been applied to the |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5738 // referent object. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5739 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5740 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5741 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5742 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5743 // We also need to do this copying before we process the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5744 // objects discovered by the STW ref processor in case one of these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5745 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5746 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5747 |
| 4711 | 5748 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5749 no_of_gc_workers == workers()->active_workers(), |
| 5750 "Need to reset active GC workers"); | |
| 5751 | |
| 5752 set_par_threads(no_of_gc_workers); | |
| 5753 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5754 no_of_gc_workers, | |
| 5755 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5756 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5757 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5758 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5759 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5760 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5761 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5762 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5763 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5764 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5765 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5766 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5767 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5768 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5769 // of JNI refs is serial and performed serially by the current thread |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5770 // rather than by a worker. The following PSS will be used for processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5771 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5772 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5773 // Use only a single queue for this PSS. |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5774 G1ParScanThreadState pss(this, 0, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5775 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5776 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5777 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5778 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5779 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5780 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5781 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5782 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5783 assert(pss.queue_is_empty(), "pre-condition"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5784 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5785 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5786 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5787 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5788 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5789 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5790 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5791 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5792 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5793 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5794 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5795 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5796 // Keep alive closure. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5797 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5798 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5799 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5800 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5801 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5802 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5803 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5804 |
| 10405 | 5805 ReferenceProcessorStats stats; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5806 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5807 // Serial reference processing... |
| 10405 | 5808 stats = rp->process_discovered_references(&is_alive, |
| 5809 &keep_alive, | |
| 5810 &drain_queue, | |
| 5811 NULL, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5812 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5813 _gc_tracer_stw->gc_id()); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5814 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5815 // Parallel reference processing |
| 6819 | 5816 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5817 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5818 | |
| 5819 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
| 10405 | 5820 stats = rp->process_discovered_references(&is_alive, |
| 5821 &keep_alive, | |
| 5822 &drain_queue, | |
| 5823 &par_task_executor, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5824 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5825 _gc_tracer_stw->gc_id()); |
| 10405 | 5826 } |
| 5827 | |
| 5828 _gc_tracer_stw->report_gc_reference_stats(stats); | |
|
20215
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5829 |
|
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5830 // We have completed copying any necessary live referent objects. |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5831 assert(pss.queue_is_empty(), "both queue and overflow should be empty"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5832 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5833 double ref_proc_time = os::elapsedTime() - ref_proc_start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5834 g1_policy()->phase_times()->record_ref_proc_time(ref_proc_time * 1000.0); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5835 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5836 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5837 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5838 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5839 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5840 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5841 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5842 assert(!rp->discovery_enabled(), "should have been disabled as part of processing"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5843 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5844 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5845 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5846 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5847 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5848 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5849 } else { |
| 10405 | 5850 // Parallel reference enqueueing |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5851 |
| 6819 | 5852 assert(no_of_gc_workers == workers()->active_workers(), |
| 5853 "Need to reset active workers"); | |
| 5854 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5855 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5856 | |
| 5857 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5858 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5859 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5860 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5861 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5862 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5863 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5864 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5865 // CM's reference processing also cleans up the string and symbol tables. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5866 // Should we do that here also? We could, but it is a serial operation |
| 10405 | 5867 // and could significantly increase the pause time. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5868 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5869 double ref_enq_time = os::elapsedTime() - ref_enq_start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5870 g1_policy()->phase_times()->record_ref_enq_time(ref_enq_time * 1000.0); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5871 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5872 |
| 10405 | 5873 void G1CollectedHeap::evacuate_collection_set(EvacuationInfo& evacuation_info) { |
|
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
5874 _expand_heap_after_alloc_failure = true; |
| 10405 | 5875 _evacuation_failed = false; |
| 342 | 5876 |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5877 // Should G1EvacuationFailureALot be in effect for this GC? |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5878 NOT_PRODUCT(set_evacuation_failure_alot_for_current_gc();) |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5879 |
| 342 | 5880 g1_rem_set()->prepare_for_oops_into_collection_set_do(); |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5881 |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5882 // Disable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5883 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5884 hot_card_cache->reset_hot_cache_claimed_index(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5885 hot_card_cache->set_use_cache(false); |
| 889 | 5886 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5887 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5888 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5889 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5890 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5891 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5892 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5893 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5894 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5895 "If not dynamic should be using all the workers"); |
| 4711 | 5896 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5897 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5898 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5899 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5900 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5901 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5902 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5903 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5904 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5905 |
| 5906 init_for_evac_failure(NULL); | |
| 5907 | |
| 5908 rem_set()->prepare_for_younger_refs_iterate(true); | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5909 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5910 assert(dirty_card_queue_set().completed_buffers_num() == 0, "Should be empty"); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5911 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5912 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5913 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5914 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5915 StrongRootsScope srs(this); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5916 // InitialMark needs claim bits to keep track of the marked-through CLDs. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5917 if (g1_policy()->during_initial_mark_pause()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5918 ClassLoaderDataGraph::clear_claimed_marks(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5919 } |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5920 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5921 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5922 // The individual threads will set their evac-failure closures. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5923 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5924 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5925 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5926 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5927 "If not dynamic should be using all the workers"); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5928 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5929 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5930 g1_par_task.set_for_termination(n_workers); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5931 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5932 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5933 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5934 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5935 // Closing the inner scope will execute the destructor |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5936 // for the StrongRootsScope object. We record the current |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5937 // elapsed time before closing the scope so that time |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5938 // taken for the SRS destructor is NOT included in the |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5939 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5940 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5941 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5942 double par_time_ms = (end_par_time_sec - start_par_time_sec) * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5943 g1_policy()->phase_times()->record_par_time(par_time_ms); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5944 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5945 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5946 (os::elapsedTime() - end_par_time_sec) * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5947 g1_policy()->phase_times()->record_code_root_fixup_time(code_root_fixup_time_ms); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5948 |
| 342 | 5949 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5950 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5951 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5952 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5953 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5954 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5955 // not copied during the pause. |
| 6819 | 5956 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5957 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5958 // Weak root processing. |
| 342 | 5959 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5960 G1STWIsAliveClosure is_alive(this); |
| 342 | 5961 G1KeepAliveClosure keep_alive(this); |
| 5962 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 17764 | 5963 if (G1StringDedup::is_enabled()) { |
| 5964 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
| 5965 } | |
| 342 | 5966 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5967 |
| 10405 | 5968 release_gc_alloc_regions(n_workers, evacuation_info); |
| 342 | 5969 g1_rem_set()->cleanup_after_oops_into_collection_set_do(); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5970 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5971 // Reset and re-enable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5972 // Note the counts for the cards in the regions in the |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5973 // collection set are reset when the collection set is freed. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5974 hot_card_cache->reset_hot_cache(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5975 hot_card_cache->set_use_cache(true); |
| 342 | 5976 |
| 12080 | 5977 // Migrate the strong code roots attached to each region in |
| 5978 // the collection set. Ideally we would like to do this | |
| 5979 // after we have finished the scanning/evacuation of the | |
| 5980 // strong code roots for a particular heap region. | |
| 5981 migrate_strong_code_roots(); | |
| 5982 | |
|
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5983 purge_code_root_memory(); |
|
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5984 |
| 12080 | 5985 if (g1_policy()->during_initial_mark_pause()) { |
| 5986 // Reset the claim values set during marking the strong code roots | |
| 5987 reset_heap_region_claim_values(); | |
| 5988 } | |
| 5989 | |
| 342 | 5990 finalize_for_evac_failure(); |
| 5991 | |
| 5992 if (evacuation_failed()) { | |
| 5993 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5994 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5995 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5996 // Note: the values are reset only when an actual |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5997 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5998 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 5999 } |
| 6000 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6001 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6002 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6003 // this after the card table is cleaned (and verified) as |
| 10405 | 6004 // the act of enqueueing entries on to the pending list |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6005 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6006 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6007 // RSets. |
| 6819 | 6008 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6009 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
6010 if (G1DeferredRSUpdate) { |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
6011 redirty_logged_cards(); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
6012 } |
| 342 | 6013 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 6014 } | |
| 6015 | |
| 2152 | 6016 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 6017 FreeRegionList* free_list, | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6018 bool par, |
|
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6019 bool locked) { |
| 2152 | 6020 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
| 6021 assert(!hr->is_empty(), "the region should not be empty"); | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6022 assert(_hrm.is_available(hr->hrm_index()), "region should be committed"); |
| 2152 | 6023 assert(free_list != NULL, "pre-condition"); |
| 6024 | |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6025 if (G1VerifyBitmaps) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6026 MemRegion mr(hr->bottom(), hr->end()); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6027 concurrent_mark()->clearRangePrevBitmap(mr); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6028 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6029 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6030 // Clear the card counts for this region. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6031 // Note: we only need to do this if the region is not young |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6032 // (since we don't refine cards in young regions). |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6033 if (!hr->is_young()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6034 _cg1r->hot_card_cache()->reset_card_counts(hr); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6035 } |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6036 hr->hr_clear(par, true /* clear_space */, locked /* locked */); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6037 free_list->add_ordered(hr); |
| 2152 | 6038 } |
| 6039 | |
| 6040 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 6041 FreeRegionList* free_list, | |
| 6042 bool par) { | |
| 6043 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 6044 assert(free_list != NULL, "pre-condition"); | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6045 |
| 2152 | 6046 size_t hr_capacity = hr->capacity(); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6047 // We need to read this before we make the region non-humongous, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6048 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6049 uint last_index = hr->last_hc_index(); |
| 2152 | 6050 hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6051 free_region(hr, free_list, par); |
| 2152 | 6052 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6053 uint i = hr->hrm_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6054 while (i < last_index) { |
| 3766 | 6055 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6056 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 6057 curr_hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6058 free_region(curr_hr, free_list, par); |
| 2152 | 6059 i += 1; |
| 6060 } | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6061 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6062 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6063 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6064 const HeapRegionSetCount& humongous_regions_removed) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6065 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6066 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6067 _old_set.bulk_remove(old_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6068 _humongous_set.bulk_remove(humongous_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6069 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6070 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6071 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6072 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6073 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6074 assert(list != NULL, "list can't be null"); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6075 if (!list->is_empty()) { |
| 2152 | 6076 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6077 _hrm.insert_list_into_free_list(list); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6078 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6079 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6080 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6081 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6082 assert(_summary_bytes_used >= bytes, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6083 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" should be >= bytes: "SIZE_FORMAT, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6084 _summary_bytes_used, bytes)); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6085 _summary_bytes_used -= bytes; |
| 342 | 6086 } |
| 6087 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6088 class G1ParCleanupCTTask : public AbstractGangTask { |
| 12343 | 6089 G1SATBCardTableModRefBS* _ct_bs; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6090 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6091 HeapRegion* volatile _su_head; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6092 public: |
| 12343 | 6093 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6094 G1CollectedHeap* g1h) : |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6095 AbstractGangTask("G1 Par Cleanup CT Task"), |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6096 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6097 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6098 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6099 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6100 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6101 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6102 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6103 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6104 |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6105 void clear_cards(HeapRegion* r) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6106 // Cards of the survivors should have already been dirtied. |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6107 if (!r->is_survivor()) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6108 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6109 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6110 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6111 }; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6112 |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6113 #ifndef PRODUCT |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6114 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6115 G1CollectedHeap* _g1h; |
| 12343 | 6116 G1SATBCardTableModRefBS* _ct_bs; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6117 public: |
| 12343 | 6118 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, G1SATBCardTableModRefBS* ct_bs) |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6119 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6120 virtual bool doHeapRegion(HeapRegion* r) { |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6121 if (r->is_survivor()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6122 _g1h->verify_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6123 } else { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6124 _g1h->verify_not_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6125 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6126 return false; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6127 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6128 }; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6129 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6130 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6131 // All of the region should be clean. |
| 12343 | 6132 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6133 MemRegion mr(hr->bottom(), hr->end()); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6134 ct_bs->verify_not_dirty_region(mr); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6135 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6136 |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6137 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6138 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6139 // dirty allocated blocks as they allocate them. The thread that |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6140 // retires each region and replaces it with a new one will do a |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6141 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6142 // not dirty that area (one less thing to have to do while holding |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6143 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6144 // is dirty. |
| 12343 | 6145 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6146 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
|
12835
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6147 if (hr->is_young()) { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6148 ct_bs->verify_g1_young_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6149 } else { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6150 ct_bs->verify_dirty_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6151 } |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6152 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6153 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6154 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
| 12343 | 6155 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6156 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6157 verify_dirty_region(hr); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6158 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6159 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6160 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6161 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6162 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6163 } |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6164 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6165 bool G1CollectedHeap::verify_no_bits_over_tams(const char* bitmap_name, CMBitMapRO* bitmap, |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6166 HeapWord* tams, HeapWord* end) { |
|
e0954897238a
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|
6167 guarantee(tams <= end, |
|
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|
6168 err_msg("tams: "PTR_FORMAT" end: "PTR_FORMAT, tams, end)); |
|
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|
6169 HeapWord* result = bitmap->getNextMarkedWordAddress(tams, end); |
|
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|
6170 if (result < end) { |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6171 gclog_or_tty->cr(); |
|
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|
6172 gclog_or_tty->print_cr("## wrong marked address on %s bitmap: "PTR_FORMAT, |
|
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|
6173 bitmap_name, result); |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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|
6174 gclog_or_tty->print_cr("## %s tams: "PTR_FORMAT" end: "PTR_FORMAT, |
|
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|
6175 bitmap_name, tams, end); |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6176 return false; |
|
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|
6177 } |
|
e0954897238a
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|
6178 return true; |
|
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diff
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|
6179 } |
|
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|
6180 |
|
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|
6181 bool G1CollectedHeap::verify_bitmaps(const char* caller, HeapRegion* hr) { |
|
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|
6182 CMBitMapRO* prev_bitmap = concurrent_mark()->prevMarkBitMap(); |
|
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|
6183 CMBitMapRO* next_bitmap = (CMBitMapRO*) concurrent_mark()->nextMarkBitMap(); |
|
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|
6184 |
|
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|
6185 HeapWord* bottom = hr->bottom(); |
|
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|
6186 HeapWord* ptams = hr->prev_top_at_mark_start(); |
|
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|
6187 HeapWord* ntams = hr->next_top_at_mark_start(); |
|
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|
6188 HeapWord* end = hr->end(); |
|
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|
6189 |
|
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|
6190 bool res_p = verify_no_bits_over_tams("prev", prev_bitmap, ptams, end); |
|
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|
6191 |
|
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|
6192 bool res_n = true; |
|
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|
6193 // We reset mark_in_progress() before we reset _cmThread->in_progress() and in this window |
|
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|
6194 // we do the clearing of the next bitmap concurrently. Thus, we can not verify the bitmap |
|
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|
6195 // if we happen to be in that state. |
|
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|
6196 if (mark_in_progress() || !_cmThread->in_progress()) { |
|
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brutisso
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|
6197 res_n = verify_no_bits_over_tams("next", next_bitmap, ntams, end); |
|
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|
6198 } |
|
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|
6199 if (!res_p || !res_n) { |
|
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|
6200 gclog_or_tty->print_cr("#### Bitmap verification failed for "HR_FORMAT, |
|
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|
6201 HR_FORMAT_PARAMS(hr)); |
|
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|
6202 gclog_or_tty->print_cr("#### Caller: %s", caller); |
|
e0954897238a
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|
6203 return false; |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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diff
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|
6204 } |
|
e0954897238a
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|
6205 return true; |
|
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20282
diff
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|
6206 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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20282
diff
changeset
|
6207 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6208 void G1CollectedHeap::check_bitmaps(const char* caller, HeapRegion* hr) { |
|
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brutisso
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|
6209 if (!G1VerifyBitmaps) return; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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|
6210 |
|
e0954897238a
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brutisso
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|
6211 guarantee(verify_bitmaps(caller, hr), "bitmap verification"); |
|
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brutisso
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diff
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|
6212 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6213 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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parents:
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changeset
|
6214 class G1VerifyBitmapClosure : public HeapRegionClosure { |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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parents:
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|
6215 private: |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6216 const char* _caller; |
|
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brutisso
parents:
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|
6217 G1CollectedHeap* _g1h; |
|
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|
6218 bool _failures; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6219 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6220 public: |
|
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brutisso
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|
6221 G1VerifyBitmapClosure(const char* caller, G1CollectedHeap* g1h) : |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6222 _caller(caller), _g1h(g1h), _failures(false) { } |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6223 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6224 bool failures() { return _failures; } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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20282
diff
changeset
|
6225 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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20282
diff
changeset
|
6226 virtual bool doHeapRegion(HeapRegion* hr) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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diff
changeset
|
6227 if (hr->continuesHumongous()) return false; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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diff
changeset
|
6228 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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diff
changeset
|
6229 bool result = _g1h->verify_bitmaps(_caller, hr); |
|
e0954897238a
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brutisso
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diff
changeset
|
6230 if (!result) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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diff
changeset
|
6231 _failures = true; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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parents:
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diff
changeset
|
6232 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6233 return false; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6234 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6235 }; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6236 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6237 void G1CollectedHeap::check_bitmaps(const char* caller) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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20282
diff
changeset
|
6238 if (!G1VerifyBitmaps) return; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6239 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6240 G1VerifyBitmapClosure cl(caller, this); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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20282
diff
changeset
|
6241 heap_region_iterate(&cl); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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20282
diff
changeset
|
6242 guarantee(!cl.failures(), "bitmap verification"); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6243 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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20282
diff
changeset
|
6244 #endif // PRODUCT |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6245 |
| 342 | 6246 void G1CollectedHeap::cleanUpCardTable() { |
| 12343 | 6247 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 6248 double start = os::elapsedTime(); |
| 6249 | |
| 4023 | 6250 { |
| 6251 // Iterate over the dirty cards region list. | |
| 6252 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 6253 | |
| 4711 | 6254 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 6255 set_par_threads(); | |
| 4023 | 6256 workers()->run_task(&cleanup_task); |
| 6257 set_par_threads(0); | |
| 6258 } else { | |
| 6259 while (_dirty_cards_region_list) { | |
| 6260 HeapRegion* r = _dirty_cards_region_list; | |
| 6261 cleanup_task.clear_cards(r); | |
| 6262 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 6263 if (_dirty_cards_region_list == r) { | |
| 6264 // The last region. | |
| 6265 _dirty_cards_region_list = NULL; | |
| 6266 } | |
| 6267 r->set_next_dirty_cards_region(NULL); | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6268 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6269 } |
| 4023 | 6270 #ifndef PRODUCT |
| 6271 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 6272 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 6273 heap_region_iterate(&cleanup_verifier); | |
| 6274 } | |
| 6275 #endif | |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6276 } |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6277 |
| 342 | 6278 double elapsed = os::elapsedTime() - start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6279 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 6280 } |
| 6281 | |
| 10405 | 6282 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
| 2152 | 6283 size_t pre_used = 0; |
| 6284 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 6285 | |
| 342 | 6286 double young_time_ms = 0.0; |
| 6287 double non_young_time_ms = 0.0; | |
| 6288 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6289 // Since the collection set is a superset of the the young list, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6290 // all we need to do to clear the young list is clear its |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6291 // head and length, and unlink any young regions in the code below |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6292 _young_list->clear(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6293 |
| 342 | 6294 G1CollectorPolicy* policy = g1_policy(); |
| 6295 | |
| 6296 double start_sec = os::elapsedTime(); | |
| 6297 bool non_young = true; | |
| 6298 | |
| 6299 HeapRegion* cur = cs_head; | |
| 6300 int age_bound = -1; | |
| 6301 size_t rs_lengths = 0; | |
| 6302 | |
| 6303 while (cur != NULL) { | |
| 2361 | 6304 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 6305 if (non_young) { |
| 6306 if (cur->is_young()) { | |
| 6307 double end_sec = os::elapsedTime(); | |
| 6308 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 6309 non_young_time_ms += elapsed_ms; | |
| 6310 | |
| 6311 start_sec = os::elapsedTime(); | |
| 6312 non_young = false; | |
| 6313 } | |
| 6314 } else { | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6315 if (!cur->is_young()) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6316 double end_sec = os::elapsedTime(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6317 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6318 young_time_ms += elapsed_ms; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6319 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6320 start_sec = os::elapsedTime(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6321 non_young = true; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6322 } |
| 342 | 6323 } |
| 6324 | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6325 rs_lengths += cur->rem_set()->occupied_locked(); |
| 342 | 6326 |
| 6327 HeapRegion* next = cur->next_in_collection_set(); | |
| 6328 assert(cur->in_collection_set(), "bad CS"); | |
| 6329 cur->set_next_in_collection_set(NULL); | |
| 6330 cur->set_in_collection_set(false); | |
| 6331 | |
| 6332 if (cur->is_young()) { | |
| 6333 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6334 assert(index != -1, "invariant"); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6335 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 6336 size_t words_survived = _surviving_young_words[index]; |
| 6337 cur->record_surv_words_in_group(words_survived); | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6338 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6339 // At this point the we have 'popped' cur from the collection set |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6340 // (linked via next_in_collection_set()) but it is still in the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6341 // young list (linked via next_young_region()). Clear the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6342 // _next_young_region field. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6343 cur->set_next_young_region(NULL); |
| 342 | 6344 } else { |
| 6345 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6346 assert(index == -1, "invariant"); |
| 342 | 6347 } |
| 6348 | |
| 6349 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 6350 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 6351 "invariant" ); | |
| 6352 | |
| 6353 if (!cur->evacuation_failed()) { | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6354 MemRegion used_mr = cur->used_region(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6355 |
| 342 | 6356 // And the region is empty. |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6357 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6358 pre_used += cur->used(); |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6359 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
| 342 | 6360 } else { |
| 6361 cur->uninstall_surv_rate_group(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6362 if (cur->is_young()) { |
| 342 | 6363 cur->set_young_index_in_cset(-1); |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6364 } |
| 342 | 6365 cur->set_not_young(); |
| 6366 cur->set_evacuation_failed(false); | |
| 4072 | 6367 // The region is now considered to be old. |
| 6368 _old_set.add(cur); | |
| 10405 | 6369 evacuation_info.increment_collectionset_used_after(cur->used()); |
| 342 | 6370 } |
| 6371 cur = next; | |
| 6372 } | |
| 6373 | |
| 10405 | 6374 evacuation_info.set_regions_freed(local_free_list.length()); |
| 342 | 6375 policy->record_max_rs_lengths(rs_lengths); |
| 6376 policy->cset_regions_freed(); | |
| 6377 | |
| 6378 double end_sec = os::elapsedTime(); | |
| 6379 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6380 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6381 if (non_young) { |
| 342 | 6382 non_young_time_ms += elapsed_ms; |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6383 } else { |
| 342 | 6384 young_time_ms += elapsed_ms; |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6385 } |
| 342 | 6386 |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6387 prepend_to_freelist(&local_free_list); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6388 decrement_summary_bytes(pre_used); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6389 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6390 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6391 } |
| 6392 | |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6393 class G1FreeHumongousRegionClosure : public HeapRegionClosure { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6394 private: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6395 FreeRegionList* _free_region_list; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6396 HeapRegionSet* _proxy_set; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6397 HeapRegionSetCount _humongous_regions_removed; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6398 size_t _freed_bytes; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6399 public: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6400 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6401 G1FreeHumongousRegionClosure(FreeRegionList* free_region_list) : |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6402 _free_region_list(free_region_list), _humongous_regions_removed(), _freed_bytes(0) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6403 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6404 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6405 virtual bool doHeapRegion(HeapRegion* r) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6406 if (!r->startsHumongous()) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6407 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6408 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6409 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6410 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6411 |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6412 oop obj = (oop)r->bottom(); |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6413 CMBitMap* next_bitmap = g1h->concurrent_mark()->nextMarkBitMap(); |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6414 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6415 // The following checks whether the humongous object is live are sufficient. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6416 // The main additional check (in addition to having a reference from the roots |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6417 // or the young gen) is whether the humongous object has a remembered set entry. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6418 // |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6419 // A humongous object cannot be live if there is no remembered set for it |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6420 // because: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6421 // - there can be no references from within humongous starts regions referencing |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6422 // the object because we never allocate other objects into them. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6423 // (I.e. there are no intra-region references that may be missed by the |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6424 // remembered set) |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6425 // - as soon there is a remembered set entry to the humongous starts region |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6426 // (i.e. it has "escaped" to an old object) this remembered set entry will stay |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6427 // until the end of a concurrent mark. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6428 // |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6429 // It is not required to check whether the object has been found dead by marking |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6430 // or not, in fact it would prevent reclamation within a concurrent cycle, as |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6431 // all objects allocated during that time are considered live. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6432 // SATB marking is even more conservative than the remembered set. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6433 // So if at this point in the collection there is no remembered set entry, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6434 // nobody has a reference to it. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6435 // At the start of collection we flush all refinement logs, and remembered sets |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6436 // are completely up-to-date wrt to references to the humongous object. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6437 // |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6438 // Other implementation considerations: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6439 // - never consider object arrays: while they are a valid target, they have not |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6440 // been observed to be used as temporary objects. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6441 // - they would also pose considerable effort for cleaning up the the remembered |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6442 // sets. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6443 // While this cleanup is not strictly necessary to be done (or done instantly), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6444 // given that their occurrence is very low, this saves us this additional |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6445 // complexity. |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6446 uint region_idx = r->hrm_index(); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6447 if (g1h->humongous_is_live(region_idx) || |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6448 g1h->humongous_region_is_always_live(region_idx)) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6449 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6450 if (G1TraceReclaimDeadHumongousObjectsAtYoungGC) { |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6451 gclog_or_tty->print_cr("Live humongous %d region %d with remset "SIZE_FORMAT" code roots "SIZE_FORMAT" is marked %d live-other %d obj array %d", |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6452 r->isHumongous(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6453 region_idx, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6454 r->rem_set()->occupied(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6455 r->rem_set()->strong_code_roots_list_length(), |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6456 next_bitmap->isMarked(r->bottom()), |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6457 g1h->humongous_is_live(region_idx), |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6458 obj->is_objArray() |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6459 ); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6460 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6461 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6462 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6463 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6464 |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6465 guarantee(!obj->is_objArray(), |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6466 err_msg("Eagerly reclaiming object arrays is not supported, but the object "PTR_FORMAT" is.", |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6467 r->bottom())); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6468 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6469 if (G1TraceReclaimDeadHumongousObjectsAtYoungGC) { |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6470 gclog_or_tty->print_cr("Reclaim humongous region %d start "PTR_FORMAT" region %d length "UINT32_FORMAT" with remset "SIZE_FORMAT" code roots "SIZE_FORMAT" is marked %d live-other %d obj array %d", |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6471 r->isHumongous(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6472 r->bottom(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6473 region_idx, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6474 r->region_num(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6475 r->rem_set()->occupied(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
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diff
changeset
|
6476 r->rem_set()->strong_code_roots_list_length(), |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6477 next_bitmap->isMarked(r->bottom()), |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6478 g1h->humongous_is_live(region_idx), |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6479 obj->is_objArray() |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6480 ); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6481 } |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6482 // Need to clear mark bit of the humongous object if already set. |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6483 if (next_bitmap->isMarked(r->bottom())) { |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6484 next_bitmap->clear(r->bottom()); |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6485 } |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
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diff
changeset
|
6486 _freed_bytes += r->used(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
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diff
changeset
|
6487 r->set_containing_set(NULL); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6488 _humongous_regions_removed.increment(1u, r->capacity()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6489 g1h->free_humongous_region(r, _free_region_list, false); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6490 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6491 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6492 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6493 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6494 HeapRegionSetCount& humongous_free_count() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6495 return _humongous_regions_removed; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6496 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6497 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6498 size_t bytes_freed() const { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6499 return _freed_bytes; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6500 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6501 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6502 size_t humongous_reclaimed() const { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
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diff
changeset
|
6503 return _humongous_regions_removed.length(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6504 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6505 }; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6506 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6507 void G1CollectedHeap::eagerly_reclaim_humongous_regions() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6508 assert_at_safepoint(true); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6509 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6510 if (!G1ReclaimDeadHumongousObjectsAtYoungGC || !_has_humongous_reclaim_candidates) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6511 g1_policy()->phase_times()->record_fast_reclaim_humongous_time_ms(0.0, 0); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6512 return; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6513 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6514 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6515 double start_time = os::elapsedTime(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6516 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6517 FreeRegionList local_cleanup_list("Local Humongous Cleanup List"); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6518 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6519 G1FreeHumongousRegionClosure cl(&local_cleanup_list); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6520 heap_region_iterate(&cl); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6521 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6522 HeapRegionSetCount empty_set; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6523 remove_from_old_sets(empty_set, cl.humongous_free_count()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6524 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6525 G1HRPrinter* hr_printer = _g1h->hr_printer(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6526 if (hr_printer->is_active()) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6527 FreeRegionListIterator iter(&local_cleanup_list); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6528 while (iter.more_available()) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6529 HeapRegion* hr = iter.get_next(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6530 hr_printer->cleanup(hr); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6531 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6532 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6533 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6534 prepend_to_freelist(&local_cleanup_list); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6535 decrement_summary_bytes(cl.bytes_freed()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6536 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6537 g1_policy()->phase_times()->record_fast_reclaim_humongous_time_ms((os::elapsedTime() - start_time) * 1000.0, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6538 cl.humongous_reclaimed()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6539 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6540 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6541 // This routine is similar to the above but does not record |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6542 // any policy statistics or update free lists; we are abandoning |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6543 // the current incremental collection set in preparation of a |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6544 // full collection. After the full GC we will start to build up |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6545 // the incremental collection set again. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6546 // This is only called when we're doing a full collection |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6547 // and is immediately followed by the tearing down of the young list. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6548 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6549 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6550 HeapRegion* cur = cs_head; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6551 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6552 while (cur != NULL) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6553 HeapRegion* next = cur->next_in_collection_set(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6554 assert(cur->in_collection_set(), "bad CS"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6555 cur->set_next_in_collection_set(NULL); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6556 cur->set_in_collection_set(false); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6557 cur->set_young_index_in_cset(-1); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6558 cur = next; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6559 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6560 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6561 |
| 2152 | 6562 void G1CollectedHeap::set_free_regions_coming() { |
| 6563 if (G1ConcRegionFreeingVerbose) { | |
| 6564 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6565 "setting free regions coming"); | |
| 6566 } | |
| 6567 | |
| 6568 assert(!free_regions_coming(), "pre-condition"); | |
| 6569 _free_regions_coming = true; | |
| 342 | 6570 } |
| 6571 | |
| 2152 | 6572 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6573 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6574 |
| 2152 | 6575 { |
| 6576 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6577 _free_regions_coming = false; | |
| 6578 SecondaryFreeList_lock->notify_all(); | |
| 6579 } | |
| 6580 | |
| 6581 if (G1ConcRegionFreeingVerbose) { | |
| 6582 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6583 "reset free regions coming"); | |
| 342 | 6584 } |
| 6585 } | |
| 6586 | |
| 2152 | 6587 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6588 // Most of the time we won't have to wait, so let's do a quick test | |
| 6589 // first before we take the lock. | |
| 6590 if (!free_regions_coming()) { | |
| 6591 return; | |
| 6592 } | |
| 6593 | |
| 6594 if (G1ConcRegionFreeingVerbose) { | |
| 6595 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6596 "waiting for free regions"); | |
| 342 | 6597 } |
| 6598 | |
| 6599 { | |
| 2152 | 6600 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6601 while (free_regions_coming()) { | |
| 6602 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6603 } |
| 2152 | 6604 } |
| 6605 | |
| 6606 if (G1ConcRegionFreeingVerbose) { | |
| 6607 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6608 "done waiting for free regions"); | |
| 6609 } | |
| 342 | 6610 } |
| 6611 | |
| 6612 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6613 assert(heap_lock_held_for_gc(), | |
| 6614 "the heap lock should already be held by or for this thread"); | |
| 6615 _young_list->push_region(hr); | |
| 6616 } | |
| 6617 | |
| 6618 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6619 private: | |
| 6620 bool _success; | |
| 6621 public: | |
| 6622 NoYoungRegionsClosure() : _success(true) { } | |
| 6623 bool doHeapRegion(HeapRegion* r) { | |
| 6624 if (r->is_young()) { | |
| 6625 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6626 r->bottom(), r->end()); | |
| 6627 _success = false; | |
| 6628 } | |
| 6629 return false; | |
| 6630 } | |
| 6631 bool success() { return _success; } | |
| 6632 }; | |
| 6633 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6634 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6635 bool ret = _young_list->check_list_empty(check_sample); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6636 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6637 if (check_heap) { |
| 342 | 6638 NoYoungRegionsClosure closure; |
| 6639 heap_region_iterate(&closure); | |
| 6640 ret = ret && closure.success(); | |
| 6641 } | |
| 6642 | |
| 6643 return ret; | |
| 6644 } | |
| 6645 | |
| 4072 | 6646 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6647 private: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6648 HeapRegionSet *_old_set; |
| 2152 | 6649 |
| 342 | 6650 public: |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6651 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6652 |
| 342 | 6653 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6654 if (r->is_empty()) { |
| 6655 // We ignore empty regions, we'll empty the free list afterwards | |
| 6656 } else if (r->is_young()) { | |
| 6657 // We ignore young regions, we'll empty the young list afterwards | |
| 6658 } else if (r->isHumongous()) { | |
| 6659 // We ignore humongous regions, we're not tearing down the | |
| 6660 // humongous region set | |
| 342 | 6661 } else { |
| 4072 | 6662 // The rest should be old |
| 6663 _old_set->remove(r); | |
| 342 | 6664 } |
| 6665 return false; | |
| 6666 } | |
| 6667 | |
| 4072 | 6668 ~TearDownRegionSetsClosure() { |
| 6669 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6670 } |
| 342 | 6671 }; |
| 6672 | |
| 4072 | 6673 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6674 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6675 | |
| 6676 if (!free_list_only) { | |
| 6677 TearDownRegionSetsClosure cl(&_old_set); | |
| 6678 heap_region_iterate(&cl); | |
| 6679 | |
| 17764 | 6680 // Note that emptying the _young_list is postponed and instead done as |
| 6681 // the first step when rebuilding the regions sets again. The reason for | |
| 6682 // this is that during a full GC string deduplication needs to know if | |
| 6683 // a collected region was young or old when the full GC was initiated. | |
| 4072 | 6684 } |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6685 _hrm.remove_all_free_regions(); |
| 4072 | 6686 } |
| 6687 | |
| 6688 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6689 private: | |
| 6690 bool _free_list_only; | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6691 HeapRegionSet* _old_set; |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6692 HeapRegionManager* _hrm; |
| 4072 | 6693 size_t _total_used; |
| 6694 | |
| 6695 public: | |
| 6696 RebuildRegionSetsClosure(bool free_list_only, | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6697 HeapRegionSet* old_set, HeapRegionManager* hrm) : |
| 4072 | 6698 _free_list_only(free_list_only), |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6699 _old_set(old_set), _hrm(hrm), _total_used(0) { |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6700 assert(_hrm->num_free_regions() == 0, "pre-condition"); |
| 4072 | 6701 if (!free_list_only) { |
| 6702 assert(_old_set->is_empty(), "pre-condition"); | |
| 6703 } | |
| 6704 } | |
| 6705 | |
| 6706 bool doHeapRegion(HeapRegion* r) { | |
| 6707 if (r->continuesHumongous()) { | |
| 6708 return false; | |
| 6709 } | |
| 6710 | |
| 6711 if (r->is_empty()) { | |
| 6712 // Add free regions to the free list | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6713 _hrm->insert_into_free_list(r); |
| 4072 | 6714 } else if (!_free_list_only) { |
| 6715 assert(!r->is_young(), "we should not come across young regions"); | |
| 6716 | |
| 6717 if (r->isHumongous()) { | |
| 6718 // We ignore humongous regions, we left the humongous set unchanged | |
| 6719 } else { | |
| 6720 // The rest should be old, add them to the old set | |
| 6721 _old_set->add(r); | |
| 6722 } | |
| 6723 _total_used += r->used(); | |
| 6724 } | |
| 6725 | |
| 6726 return false; | |
| 6727 } | |
| 6728 | |
| 6729 size_t total_used() { | |
| 6730 return _total_used; | |
| 6731 } | |
| 6732 }; | |
| 6733 | |
| 6734 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6735 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6736 | |
| 17764 | 6737 if (!free_list_only) { |
| 6738 _young_list->empty_list(); | |
| 6739 } | |
| 6740 | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6741 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_hrm); |
| 4072 | 6742 heap_region_iterate(&cl); |
| 6743 | |
| 6744 if (!free_list_only) { | |
| 6745 _summary_bytes_used = cl.total_used(); | |
| 6746 } | |
| 6747 assert(_summary_bytes_used == recalculate_used(), | |
| 6748 err_msg("inconsistent _summary_bytes_used, " | |
| 6749 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 6750 _summary_bytes_used, recalculate_used())); | |
| 342 | 6751 } |
| 6752 | |
| 6753 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6754 _refine_cte_cl->set_concurrent(concurrent); | |
| 6755 } | |
| 6756 | |
| 6757 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6758 HeapRegion* hr = heap_region_containing(p); | |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
6759 return hr->is_in(p); |
| 342 | 6760 } |
| 2152 | 6761 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6762 // Methods for the mutator alloc region |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6763 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6764 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6765 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6766 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6767 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6768 "if force is true we should be able to expand the young list"); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6769 bool young_list_full = g1_policy()->is_young_list_full(); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6770 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6771 HeapRegion* new_alloc_region = new_region(word_size, |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6772 false /* is_old */, |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6773 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6774 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6775 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6776 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6777 check_bitmaps("Mutator Region Allocation", new_alloc_region); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6778 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6779 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6780 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6781 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6782 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6783 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6784 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6785 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6786 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6787 assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6788 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6789 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6790 _summary_bytes_used += allocated_bytes; |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6791 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6792 // We update the eden sizes here, when the region is retired, |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6793 // instead of when it's allocated, since this is the point that its |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6794 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6795 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6796 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6797 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6798 HeapRegion* MutatorAllocRegion::allocate_new_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6799 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6800 return _g1h->new_mutator_alloc_region(word_size, force); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6801 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6802 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6803 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6804 // Don't change the number of workers. Use the value previously set |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6805 // in the workgroup. |
| 4711 | 6806 assert(G1CollectedHeap::use_parallel_gc_threads(), "shouldn't be here otherwise"); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6807 uint n_workers = workers()->active_workers(); |
| 4711 | 6808 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6809 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6810 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6811 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6812 assert(false, "Should have been set in prior evacuation pause."); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6813 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6814 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6815 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6816 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6817 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6818 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6819 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6820 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6821 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6822 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6823 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6824 // Methods for the GC alloc regions |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6825 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6826 HeapRegion* G1CollectedHeap::new_gc_alloc_region(size_t word_size, |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6827 uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6828 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6829 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6830 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6831 if (count < g1_policy()->max_regions(ap)) { |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6832 bool survivor = (ap == GCAllocForSurvived); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6833 HeapRegion* new_alloc_region = new_region(word_size, |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6834 !survivor, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6835 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6836 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6837 // We really only need to do this for old regions given that we |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6838 // should never scan survivors. But it doesn't hurt to do it |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6839 // for survivors too. |
|
20274
a8137787acfe
8047821: G1 Does not use the save_marks functionality as intended
mgerdin
parents:
20270
diff
changeset
|
6840 new_alloc_region->record_top_and_timestamp(); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6841 if (survivor) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6842 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6843 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6844 check_bitmaps("Survivor Region Allocation", new_alloc_region); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6845 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6846 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6847 check_bitmaps("Old Region Allocation", new_alloc_region); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6848 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6849 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6850 new_alloc_region->note_start_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6851 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6852 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6853 g1_policy()->note_alloc_region_limit_reached(ap); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6854 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6855 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6856 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6857 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6858 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6859 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6860 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6861 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6862 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6863 alloc_region->note_end_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6864 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6865 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6866 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6867 } else { |
| 6868 _old_set.add(alloc_region); | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6869 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6870 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6871 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6872 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6873 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6874 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6875 assert(!force, "not supported for GC alloc regions"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6876 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6877 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6878 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6879 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6880 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6881 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6882 GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6883 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6884 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6885 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6886 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6887 assert(!force, "not supported for GC alloc regions"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6888 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6889 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6890 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6891 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6892 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6893 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6894 GCAllocForTenured); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6895 } |
|
20331
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6896 |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6897 HeapRegion* OldGCAllocRegion::release() { |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6898 HeapRegion* cur = get(); |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6899 if (cur != NULL) { |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6900 // Determine how far we are from the next card boundary. If it is smaller than |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6901 // the minimum object size we can allocate into, expand into the next card. |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6902 HeapWord* top = cur->top(); |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6903 HeapWord* aligned_top = (HeapWord*)align_ptr_up(top, G1BlockOffsetSharedArray::N_bytes); |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6904 |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6905 size_t to_allocate_words = pointer_delta(aligned_top, top, HeapWordSize); |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6906 |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6907 if (to_allocate_words != 0) { |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6908 // We are not at a card boundary. Fill up, possibly into the next, taking the |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6909 // end of the region and the minimum object size into account. |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6910 to_allocate_words = MIN2(pointer_delta(cur->end(), cur->top(), HeapWordSize), |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6911 MAX2(to_allocate_words, G1CollectedHeap::min_fill_size())); |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6912 |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6913 // Skip allocation if there is not enough space to allocate even the smallest |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6914 // possible object. In this case this region will not be retained, so the |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6915 // original problem cannot occur. |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6916 if (to_allocate_words >= G1CollectedHeap::min_fill_size()) { |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6917 HeapWord* dummy = attempt_allocation(to_allocate_words, true /* bot_updates */); |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6918 CollectedHeap::fill_with_object(dummy, to_allocate_words); |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6919 } |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6920 } |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6921 } |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6922 return G1AllocRegion::release(); |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6923 } |
|
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
6924 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6925 // Heap region set verification |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6926 |
| 2152 | 6927 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6928 private: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6929 HeapRegionSet* _old_set; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6930 HeapRegionSet* _humongous_set; |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6931 HeapRegionManager* _hrm; |
| 2152 | 6932 |
| 6933 public: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6934 HeapRegionSetCount _old_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6935 HeapRegionSetCount _humongous_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6936 HeapRegionSetCount _free_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6937 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6938 VerifyRegionListsClosure(HeapRegionSet* old_set, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6939 HeapRegionSet* humongous_set, |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6940 HeapRegionManager* hrm) : |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6941 _old_set(old_set), _humongous_set(humongous_set), _hrm(hrm), |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6942 _old_count(), _humongous_count(), _free_count(){ } |
| 2152 | 6943 |
| 6944 bool doHeapRegion(HeapRegion* hr) { | |
| 6945 if (hr->continuesHumongous()) { | |
| 6946 return false; | |
| 6947 } | |
| 6948 | |
| 6949 if (hr->is_young()) { | |
| 6950 // TODO | |
| 6951 } else if (hr->startsHumongous()) { | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6952 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->hrm_index())); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6953 _humongous_count.increment(1u, hr->capacity()); |
| 2152 | 6954 } else if (hr->is_empty()) { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6955 assert(_hrm->is_free(hr), err_msg("Heap region %u is empty but not on the free list.", hr->hrm_index())); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6956 _free_count.increment(1u, hr->capacity()); |
| 4072 | 6957 } else { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6958 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->hrm_index())); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6959 _old_count.increment(1u, hr->capacity()); |
| 2152 | 6960 } |
| 6961 return false; | |
| 6962 } | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6963 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6964 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, HeapRegionManager* free_list) { |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6965 guarantee(old_set->length() == _old_count.length(), err_msg("Old set count mismatch. Expected %u, actual %u.", old_set->length(), _old_count.length())); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6966 guarantee(old_set->total_capacity_bytes() == _old_count.capacity(), err_msg("Old set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6967 old_set->total_capacity_bytes(), _old_count.capacity())); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6968 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6969 guarantee(humongous_set->length() == _humongous_count.length(), err_msg("Hum set count mismatch. Expected %u, actual %u.", humongous_set->length(), _humongous_count.length())); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6970 guarantee(humongous_set->total_capacity_bytes() == _humongous_count.capacity(), err_msg("Hum set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6971 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6972 |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
6973 guarantee(free_list->num_free_regions() == _free_count.length(), err_msg("Free list count mismatch. Expected %u, actual %u.", free_list->num_free_regions(), _free_count.length())); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6974 guarantee(free_list->total_capacity_bytes() == _free_count.capacity(), err_msg("Free list capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6975 free_list->total_capacity_bytes(), _free_count.capacity())); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6976 } |
| 2152 | 6977 }; |
| 6978 | |
| 6979 void G1CollectedHeap::verify_region_sets() { | |
| 6980 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6981 | |
| 6982 // First, check the explicit lists. | |
|
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6983 _hrm.verify(); |
| 2152 | 6984 { |
| 6985 // Given that a concurrent operation might be adding regions to | |
| 6986 // the secondary free list we have to take the lock before | |
| 6987 // verifying it. | |
| 6988 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
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6989 _secondary_free_list.verify_list(); |
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6990 } |
| 2152 | 6991 |
| 6992 // If a concurrent region freeing operation is in progress it will | |
| 6993 // be difficult to correctly attributed any free regions we come | |
| 6994 // across to the correct free list given that they might belong to | |
| 6995 // one of several (free_list, secondary_free_list, any local lists, | |
| 6996 // etc.). So, if that's the case we will skip the rest of the | |
| 6997 // verification operation. Alternatively, waiting for the concurrent | |
| 6998 // operation to complete will have a non-trivial effect on the GC's | |
| 6999 // operation (no concurrent operation will last longer than the | |
| 7000 // interval between two calls to verification) and it might hide | |
| 7001 // any issues that we would like to catch during testing. | |
| 7002 if (free_regions_coming()) { | |
| 7003 return; | |
| 7004 } | |
| 7005 | |
| 2361 | 7006 // Make sure we append the secondary_free_list on the free_list so |
| 7007 // that all free regions we will come across can be safely | |
| 7008 // attributed to the free_list. | |
| 7009 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 7010 |
| 7011 // Finally, make sure that the region accounting in the lists is | |
| 7012 // consistent with what we see in the heap. | |
| 7013 | |
|
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7014 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_hrm); |
| 2152 | 7015 heap_region_iterate(&cl); |
|
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7016 cl.verify_counts(&_old_set, &_humongous_set, &_hrm); |
| 342 | 7017 } |
| 12080 | 7018 |
| 7019 // Optimized nmethod scanning | |
| 7020 | |
| 7021 class RegisterNMethodOopClosure: public OopClosure { | |
| 7022 G1CollectedHeap* _g1h; | |
| 7023 nmethod* _nm; | |
| 7024 | |
| 7025 template <class T> void do_oop_work(T* p) { | |
| 7026 T heap_oop = oopDesc::load_heap_oop(p); | |
| 7027 if (!oopDesc::is_null(heap_oop)) { | |
| 7028 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 7029 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
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7030 assert(!hr->continuesHumongous(), |
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7031 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
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7032 " starting at "HR_FORMAT, |
|
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7033 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
| 12080 | 7034 |
| 7035 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
| 7036 // entries but having duplicates is OK since we "mark" nmethods | |
| 7037 // as visited when we scan the strong code root lists during the GC. | |
| 7038 hr->add_strong_code_root(_nm); | |
|
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7039 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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7040 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
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7041 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 7042 } |
| 7043 } | |
| 7044 | |
| 7045 public: | |
| 7046 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 7047 _g1h(g1h), _nm(nm) {} | |
| 7048 | |
| 7049 void do_oop(oop* p) { do_oop_work(p); } | |
| 7050 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 7051 }; | |
| 7052 | |
| 7053 class UnregisterNMethodOopClosure: public OopClosure { | |
| 7054 G1CollectedHeap* _g1h; | |
| 7055 nmethod* _nm; | |
| 7056 | |
| 7057 template <class T> void do_oop_work(T* p) { | |
| 7058 T heap_oop = oopDesc::load_heap_oop(p); | |
| 7059 if (!oopDesc::is_null(heap_oop)) { | |
| 7060 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 7061 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
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7062 assert(!hr->continuesHumongous(), |
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7063 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
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7064 " starting at "HR_FORMAT, |
|
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7065 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
|
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7066 |
| 12080 | 7067 hr->remove_strong_code_root(_nm); |
|
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7068 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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7069 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
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7070 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 7071 } |
| 7072 } | |
| 7073 | |
| 7074 public: | |
| 7075 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 7076 _g1h(g1h), _nm(nm) {} | |
| 7077 | |
| 7078 void do_oop(oop* p) { do_oop_work(p); } | |
| 7079 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 7080 }; | |
| 7081 | |
| 7082 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
| 7083 CollectedHeap::register_nmethod(nm); | |
| 7084 | |
| 7085 guarantee(nm != NULL, "sanity"); | |
| 7086 RegisterNMethodOopClosure reg_cl(this, nm); | |
| 7087 nm->oops_do(®_cl); | |
| 7088 } | |
| 7089 | |
| 7090 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
| 7091 CollectedHeap::unregister_nmethod(nm); | |
| 7092 | |
| 7093 guarantee(nm != NULL, "sanity"); | |
| 7094 UnregisterNMethodOopClosure reg_cl(this, nm); | |
| 7095 nm->oops_do(®_cl, true); | |
| 7096 } | |
| 7097 | |
| 7098 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
| 7099 public: | |
| 7100 bool doHeapRegion(HeapRegion *hr) { | |
|
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7101 assert(!hr->isHumongous(), |
|
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7102 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
|
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7103 HR_FORMAT_PARAMS(hr))); |
| 12080 | 7104 hr->migrate_strong_code_roots(); |
| 7105 return false; | |
| 7106 } | |
| 7107 }; | |
| 7108 | |
| 7109 void G1CollectedHeap::migrate_strong_code_roots() { | |
| 7110 MigrateCodeRootsHeapRegionClosure cl; | |
| 7111 double migrate_start = os::elapsedTime(); | |
| 7112 collection_set_iterate(&cl); | |
| 7113 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
| 7114 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
| 7115 } | |
| 7116 | |
|
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7117 void G1CollectedHeap::purge_code_root_memory() { |
|
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7118 double purge_start = os::elapsedTime(); |
|
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7119 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
|
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7120 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
|
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7121 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
|
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|
7122 } |
|
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|
7123 |
| 12080 | 7124 class RebuildStrongCodeRootClosure: public CodeBlobClosure { |
| 7125 G1CollectedHeap* _g1h; | |
| 7126 | |
| 7127 public: | |
| 7128 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
| 7129 _g1h(g1h) {} | |
| 7130 | |
| 7131 void do_code_blob(CodeBlob* cb) { | |
| 7132 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
| 7133 if (nm == NULL) { | |
| 7134 return; | |
| 7135 } | |
| 7136 | |
|
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changeset
|
7137 if (ScavengeRootsInCode) { |
| 12080 | 7138 _g1h->register_nmethod(nm); |
| 7139 } | |
| 7140 } | |
| 7141 }; | |
| 7142 | |
| 7143 void G1CollectedHeap::rebuild_strong_code_roots() { | |
| 7144 RebuildStrongCodeRootClosure blob_cl(this); | |
| 7145 CodeCache::blobs_do(&blob_cl); | |
| 7146 } |