Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20278:2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
Reviewed-by: tschatzl, ehelin, brutisso, coleenp, roland, iveresov
Contributed-by: stefan.karlsson@oracle.com, mikael.gerdin@oracle.com
| author | stefank |
|---|---|
| date | Mon, 07 Jul 2014 10:12:40 +0200 |
| parents | a8137787acfe |
| children | 870c03421152 |
| 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" |
| 1972 | 46 #include "gc_implementation/g1/g1RemSet.inline.hpp" |
| 17764 | 47 #include "gc_implementation/g1/g1StringDedup.hpp" |
| 10405 | 48 #include "gc_implementation/g1/g1YCTypes.hpp" |
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49 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 50 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
| 51 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 52 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
| 10405 | 53 #include "gc_implementation/shared/gcHeapSummary.hpp" |
| 54 #include "gc_implementation/shared/gcTimer.hpp" | |
| 55 #include "gc_implementation/shared/gcTrace.hpp" | |
| 56 #include "gc_implementation/shared/gcTraceTime.hpp" | |
| 1972 | 57 #include "gc_implementation/shared/isGCActiveMark.hpp" |
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58 #include "memory/allocation.hpp" |
| 1972 | 59 #include "memory/gcLocker.inline.hpp" |
| 60 #include "memory/generationSpec.hpp" | |
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61 #include "memory/iterator.hpp" |
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62 #include "memory/referenceProcessor.hpp" |
| 1972 | 63 #include "oops/oop.inline.hpp" |
| 64 #include "oops/oop.pcgc.inline.hpp" | |
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65 #include "runtime/orderAccess.inline.hpp" |
| 1972 | 66 #include "runtime/vmThread.hpp" |
| 342 | 67 |
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68 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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69 |
| 342 | 70 // turn it on so that the contents of the young list (scan-only / |
| 71 // to-be-collected) are printed at "strategic" points before / during | |
| 72 // / after the collection --- this is useful for debugging | |
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73 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 74 // CURRENT STATUS |
| 75 // This file is under construction. Search for "FIXME". | |
| 76 | |
| 77 // INVARIANTS/NOTES | |
| 78 // | |
| 79 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 80 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 81 // and allocate_new_tlab, which are the "entry" points to the | |
| 82 // allocation code from the rest of the JVM. (Note that this does not | |
| 83 // apply to TLAB allocation, which is not part of this interface: it | |
| 84 // is done by clients of this interface.) | |
| 342 | 85 |
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86 // Notes on implementation of parallelism in different tasks. |
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87 // |
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88 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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89 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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90 // It does use run_task() which sets _n_workers in the task. |
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91 // G1ParTask executes g1_process_roots() -> |
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92 // SharedHeap::process_roots() which calls eventually to |
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93 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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94 // SequentialSubTasksDone. SharedHeap::process_roots() also |
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95 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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96 // |
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97 |
| 342 | 98 // Local to this file. |
| 99 | |
| 100 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 101 bool _concurrent; | |
| 102 public: | |
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103 RefineCardTableEntryClosure() : _concurrent(true) { } |
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104 |
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105 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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106 bool oops_into_cset = G1CollectedHeap::heap()->g1_rem_set()->refine_card(card_ptr, worker_i, false); |
| 1705 | 107 // This path is executed by the concurrent refine or mutator threads, |
| 108 // concurrently, and so we do not care if card_ptr contains references | |
| 109 // that point into the collection set. | |
| 110 assert(!oops_into_cset, "should be"); | |
| 111 | |
| 20192 | 112 if (_concurrent && SuspendibleThreadSet::should_yield()) { |
| 342 | 113 // Caller will actually yield. |
| 114 return false; | |
| 115 } | |
| 116 // Otherwise, we finished successfully; return true. | |
| 117 return true; | |
| 118 } | |
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119 |
| 342 | 120 void set_concurrent(bool b) { _concurrent = b; } |
| 121 }; | |
| 122 | |
| 123 | |
| 124 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
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125 size_t _num_processed; |
| 342 | 126 CardTableModRefBS* _ctbs; |
| 127 int _histo[256]; | |
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128 |
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129 public: |
| 342 | 130 ClearLoggedCardTableEntryClosure() : |
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131 _num_processed(0), _ctbs(G1CollectedHeap::heap()->g1_barrier_set()) |
| 342 | 132 { |
| 133 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 134 } | |
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135 |
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136 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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137 unsigned char* ujb = (unsigned char*)card_ptr; |
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138 int ind = (int)(*ujb); |
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139 _histo[ind]++; |
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140 |
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141 *card_ptr = (jbyte)CardTableModRefBS::clean_card_val(); |
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142 _num_processed++; |
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143 |
| 342 | 144 return true; |
| 145 } | |
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146 |
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147 size_t num_processed() { return _num_processed; } |
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148 |
| 342 | 149 void print_histo() { |
| 150 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 151 for (int i = 0; i < 256; i++) { | |
| 152 if (_histo[i] != 0) { | |
| 153 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 154 } | |
| 155 } | |
| 156 } | |
| 157 }; | |
| 158 | |
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159 class RedirtyLoggedCardTableEntryClosure : public CardTableEntryClosure { |
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160 private: |
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161 size_t _num_processed; |
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162 |
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163 public: |
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164 RedirtyLoggedCardTableEntryClosure() : CardTableEntryClosure(), _num_processed(0) { } |
| 12343 | 165 |
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166 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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167 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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168 _num_processed++; |
| 342 | 169 return true; |
| 170 } | |
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171 |
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172 size_t num_processed() const { return _num_processed; } |
| 342 | 173 }; |
| 174 | |
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175 YoungList::YoungList(G1CollectedHeap* g1h) : |
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176 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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177 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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178 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 179 } |
| 180 | |
| 181 void YoungList::push_region(HeapRegion *hr) { | |
| 182 assert(!hr->is_young(), "should not already be young"); | |
| 183 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 184 | |
| 185 hr->set_next_young_region(_head); | |
| 186 _head = hr; | |
| 187 | |
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188 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 189 ++_length; |
| 190 } | |
| 191 | |
| 192 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 193 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 194 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 195 | |
| 196 hr->set_next_young_region(_survivor_head); | |
| 197 if (_survivor_head == NULL) { | |
| 545 | 198 _survivor_tail = hr; |
| 342 | 199 } |
| 200 _survivor_head = hr; | |
| 201 ++_survivor_length; | |
| 202 } | |
| 203 | |
| 204 void YoungList::empty_list(HeapRegion* list) { | |
| 205 while (list != NULL) { | |
| 206 HeapRegion* next = list->get_next_young_region(); | |
| 207 list->set_next_young_region(NULL); | |
| 208 list->uninstall_surv_rate_group(); | |
| 209 list->set_not_young(); | |
| 210 list = next; | |
| 211 } | |
| 212 } | |
| 213 | |
| 214 void YoungList::empty_list() { | |
| 215 assert(check_list_well_formed(), "young list should be well formed"); | |
| 216 | |
| 217 empty_list(_head); | |
| 218 _head = NULL; | |
| 219 _length = 0; | |
| 220 | |
| 221 empty_list(_survivor_head); | |
| 222 _survivor_head = NULL; | |
| 545 | 223 _survivor_tail = NULL; |
| 342 | 224 _survivor_length = 0; |
| 225 | |
| 226 _last_sampled_rs_lengths = 0; | |
| 227 | |
| 228 assert(check_list_empty(false), "just making sure..."); | |
| 229 } | |
| 230 | |
| 231 bool YoungList::check_list_well_formed() { | |
| 232 bool ret = true; | |
| 233 | |
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234 uint length = 0; |
| 342 | 235 HeapRegion* curr = _head; |
| 236 HeapRegion* last = NULL; | |
| 237 while (curr != NULL) { | |
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238 if (!curr->is_young()) { |
| 342 | 239 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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240 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 241 curr->bottom(), curr->end(), |
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242 curr->is_young(), curr->is_survivor()); |
| 342 | 243 ret = false; |
| 244 } | |
| 245 ++length; | |
| 246 last = curr; | |
| 247 curr = curr->get_next_young_region(); | |
| 248 } | |
| 249 ret = ret && (length == _length); | |
| 250 | |
| 251 if (!ret) { | |
| 252 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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253 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
| 342 | 254 length, _length); |
| 255 } | |
| 256 | |
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257 return ret; |
| 342 | 258 } |
| 259 | |
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260 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 261 bool ret = true; |
| 262 | |
| 263 if (_length != 0) { | |
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264 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
| 342 | 265 _length); |
| 266 ret = false; | |
| 267 } | |
| 268 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 269 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 270 ret = false; | |
| 271 } | |
| 272 if (_head != NULL) { | |
| 273 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 274 ret = false; | |
| 275 } | |
| 276 if (!ret) { | |
| 277 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 278 } | |
| 279 | |
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280 return ret; |
| 342 | 281 } |
| 282 | |
| 283 void | |
| 284 YoungList::rs_length_sampling_init() { | |
| 285 _sampled_rs_lengths = 0; | |
| 286 _curr = _head; | |
| 287 } | |
| 288 | |
| 289 bool | |
| 290 YoungList::rs_length_sampling_more() { | |
| 291 return _curr != NULL; | |
| 292 } | |
| 293 | |
| 294 void | |
| 295 YoungList::rs_length_sampling_next() { | |
| 296 assert( _curr != NULL, "invariant" ); | |
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297 size_t rs_length = _curr->rem_set()->occupied(); |
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298 |
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299 _sampled_rs_lengths += rs_length; |
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300 |
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301 // The current region may not yet have been added to the |
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302 // incremental collection set (it gets added when it is |
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303 // retired as the current allocation region). |
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304 if (_curr->in_collection_set()) { |
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305 // Update the collection set policy information for this region |
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306 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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307 } |
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308 |
| 342 | 309 _curr = _curr->get_next_young_region(); |
| 310 if (_curr == NULL) { | |
| 311 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 312 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 void | |
| 317 YoungList::reset_auxilary_lists() { | |
| 318 guarantee( is_empty(), "young list should be empty" ); | |
| 319 assert(check_list_well_formed(), "young list should be well formed"); | |
| 320 | |
| 321 // Add survivor regions to SurvRateGroup. | |
| 322 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 323 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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324 |
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325 int young_index_in_cset = 0; |
| 342 | 326 for (HeapRegion* curr = _survivor_head; |
| 327 curr != NULL; | |
| 328 curr = curr->get_next_young_region()) { | |
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329 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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330 |
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331 // The region is a non-empty survivor so let's add it to |
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332 // the incremental collection set for the next evacuation |
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333 // pause. |
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334 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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335 young_index_in_cset += 1; |
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336 } |
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337 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
| 342 | 338 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 339 | |
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340 _head = _survivor_head; |
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341 _length = _survivor_length; |
| 342 | 342 if (_survivor_head != NULL) { |
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343 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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344 assert(_survivor_length > 0, "invariant"); |
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345 _survivor_tail->set_next_young_region(NULL); |
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346 } |
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347 |
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348 // Don't clear the survivor list handles until the start of |
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349 // the next evacuation pause - we need it in order to re-tag |
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350 // the survivor regions from this evacuation pause as 'young' |
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351 // at the start of the next. |
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352 |
| 545 | 353 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 354 |
| 355 assert(check_list_well_formed(), "young list should be well formed"); | |
| 356 } | |
| 357 | |
| 358 void YoungList::print() { | |
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359 HeapRegion* lists[] = {_head, _survivor_head}; |
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360 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 361 |
| 362 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 363 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 364 HeapRegion *curr = lists[list]; | |
| 365 if (curr == NULL) | |
| 366 gclog_or_tty->print_cr(" empty"); | |
| 367 while (curr != NULL) { | |
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368 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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369 HR_FORMAT_PARAMS(curr), |
| 342 | 370 curr->prev_top_at_mark_start(), |
| 371 curr->next_top_at_mark_start(), | |
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372 curr->age_in_surv_rate_group_cond()); |
| 342 | 373 curr = curr->get_next_young_region(); |
| 374 } | |
| 375 } | |
| 376 | |
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377 gclog_or_tty->cr(); |
| 342 | 378 } |
| 379 | |
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380 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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381 { |
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382 // Claim the right to put the region on the dirty cards region list |
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383 // by installing a self pointer. |
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384 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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385 if (next == NULL) { |
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386 HeapRegion* res = (HeapRegion*) |
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387 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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388 NULL); |
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389 if (res == NULL) { |
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390 HeapRegion* head; |
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391 do { |
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392 // Put the region to the dirty cards region list. |
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393 head = _dirty_cards_region_list; |
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394 next = (HeapRegion*) |
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395 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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396 if (next == head) { |
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397 assert(hr->get_next_dirty_cards_region() == hr, |
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398 "hr->get_next_dirty_cards_region() != hr"); |
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399 if (next == NULL) { |
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400 // The last region in the list points to itself. |
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401 hr->set_next_dirty_cards_region(hr); |
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402 } else { |
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403 hr->set_next_dirty_cards_region(next); |
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404 } |
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405 } |
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406 } while (next != head); |
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407 } |
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408 } |
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409 } |
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410 |
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411 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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412 { |
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413 HeapRegion* head; |
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414 HeapRegion* hr; |
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415 do { |
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416 head = _dirty_cards_region_list; |
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417 if (head == NULL) { |
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418 return NULL; |
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419 } |
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420 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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421 if (head == new_head) { |
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422 // The last region. |
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423 new_head = NULL; |
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424 } |
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425 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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426 head); |
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427 } while (hr != head); |
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428 assert(hr != NULL, "invariant"); |
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429 hr->set_next_dirty_cards_region(NULL); |
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430 return hr; |
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431 } |
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432 |
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433 #ifdef ASSERT |
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434 // A region is added to the collection set as it is retired |
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435 // so an address p can point to a region which will be in the |
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436 // collection set but has not yet been retired. This method |
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437 // therefore is only accurate during a GC pause after all |
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438 // regions have been retired. It is used for debugging |
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439 // to check if an nmethod has references to objects that can |
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440 // be move during a partial collection. Though it can be |
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441 // inaccurate, it is sufficient for G1 because the conservative |
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442 // implementation of is_scavengable() for G1 will indicate that |
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443 // all nmethods must be scanned during a partial collection. |
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444 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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445 HeapRegion* hr = heap_region_containing(p); |
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446 return hr != NULL && hr->in_collection_set(); |
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447 } |
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448 #endif |
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449 |
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450 // Returns true if the reference points to an object that |
| 10405 | 451 // can move in an incremental collection. |
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452 bool G1CollectedHeap::is_scavengable(const void* p) { |
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453 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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454 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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455 HeapRegion* hr = heap_region_containing(p); |
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456 if (hr == NULL) { |
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457 // null |
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458 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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459 return false; |
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460 } else { |
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461 return !hr->isHumongous(); |
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462 } |
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463 } |
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464 |
| 342 | 465 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 466 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 12343 | 467 CardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 468 |
| 469 // Count the dirty cards at the start. | |
| 470 CountNonCleanMemRegionClosure count1(this); | |
| 471 ct_bs->mod_card_iterate(&count1); | |
| 472 int orig_count = count1.n(); | |
| 473 | |
| 474 // First clear the logged cards. | |
| 475 ClearLoggedCardTableEntryClosure clear; | |
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476 dcqs.apply_closure_to_all_completed_buffers(&clear); |
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477 dcqs.iterate_closure_all_threads(&clear, false); |
| 342 | 478 clear.print_histo(); |
| 479 | |
| 480 // Now ensure that there's no dirty cards. | |
| 481 CountNonCleanMemRegionClosure count2(this); | |
| 482 ct_bs->mod_card_iterate(&count2); | |
| 483 if (count2.n() != 0) { | |
| 484 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 485 count2.n(), orig_count); | |
| 486 } | |
| 487 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 488 | |
| 489 RedirtyLoggedCardTableEntryClosure redirty; | |
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490 dcqs.apply_closure_to_all_completed_buffers(&redirty); |
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491 dcqs.iterate_closure_all_threads(&redirty, false); |
| 342 | 492 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", |
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493 clear.num_processed(), orig_count); |
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494 guarantee(redirty.num_processed() == clear.num_processed(), |
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495 err_msg("Redirtied "SIZE_FORMAT" cards, bug cleared "SIZE_FORMAT, |
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496 redirty.num_processed(), clear.num_processed())); |
| 342 | 497 |
| 498 CountNonCleanMemRegionClosure count3(this); | |
| 499 ct_bs->mod_card_iterate(&count3); | |
| 500 if (count3.n() != orig_count) { | |
| 501 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 502 orig_count, count3.n()); | |
| 503 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 504 } | |
| 505 } | |
| 506 | |
| 507 // Private class members. | |
| 508 | |
| 509 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 510 | |
| 511 // Private methods. | |
| 512 | |
| 2152 | 513 HeapRegion* |
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514 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
| 2152 | 515 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 516 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 517 if (!_secondary_free_list.is_empty()) { | |
| 518 if (G1ConcRegionFreeingVerbose) { | |
| 519 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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520 "secondary_free_list has %u entries", |
| 2152 | 521 _secondary_free_list.length()); |
| 522 } | |
| 523 // It looks as if there are free regions available on the | |
| 524 // secondary_free_list. Let's move them to the free_list and try | |
| 525 // again to allocate from it. | |
| 526 append_secondary_free_list(); | |
| 527 | |
| 528 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
| 529 "empty we should have moved at least one entry to the free_list"); | |
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530 HeapRegion* res = _free_list.remove_region(is_old); |
| 2152 | 531 if (G1ConcRegionFreeingVerbose) { |
| 532 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 533 "allocated "HR_FORMAT" from secondary_free_list", | |
| 534 HR_FORMAT_PARAMS(res)); | |
| 535 } | |
| 536 return res; | |
| 537 } | |
| 538 | |
| 10405 | 539 // Wait here until we get notified either when (a) there are no |
| 2152 | 540 // more free regions coming or (b) some regions have been moved on |
| 541 // the secondary_free_list. | |
| 542 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 543 } | |
| 544 | |
| 545 if (G1ConcRegionFreeingVerbose) { | |
| 546 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 547 "could not allocate from secondary_free_list"); | |
| 548 } | |
| 549 return NULL; | |
| 550 } | |
| 551 | |
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552 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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553 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 554 "the only time we use this to allocate a humongous region is " |
| 555 "when we are allocating a single humongous region"); | |
| 556 | |
| 557 HeapRegion* res; | |
| 558 if (G1StressConcRegionFreeing) { | |
| 559 if (!_secondary_free_list.is_empty()) { | |
| 560 if (G1ConcRegionFreeingVerbose) { | |
| 561 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 562 "forced to look at the secondary_free_list"); | |
| 563 } | |
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564 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 565 if (res != NULL) { |
| 566 return res; | |
| 567 } | |
| 568 } | |
| 569 } | |
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570 |
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571 res = _free_list.remove_region(is_old); |
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572 |
| 2152 | 573 if (res == NULL) { |
| 574 if (G1ConcRegionFreeingVerbose) { | |
| 575 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 576 "res == NULL, trying the secondary_free_list"); | |
| 577 } | |
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578 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 579 } |
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580 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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581 // Currently, only attempts to allocate GC alloc regions set |
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582 // do_expand to true. So, we should only reach here during a |
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583 // safepoint. If this assumption changes we might have to |
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584 // reconsider the use of _expand_heap_after_alloc_failure. |
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585 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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586 |
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587 ergo_verbose1(ErgoHeapSizing, |
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588 "attempt heap expansion", |
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589 ergo_format_reason("region allocation request failed") |
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590 ergo_format_byte("allocation request"), |
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591 word_size * HeapWordSize); |
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592 if (expand(word_size * HeapWordSize)) { |
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593 // Given that expand() succeeded in expanding the heap, and we |
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594 // always expand the heap by an amount aligned to the heap |
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595 // region size, the free list should in theory not be empty. |
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596 // In either case remove_region() will check for NULL. |
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597 res = _free_list.remove_region(is_old); |
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598 } else { |
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599 _expand_heap_after_alloc_failure = false; |
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600 } |
| 342 | 601 } |
| 602 return res; | |
| 603 } | |
| 604 | |
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605 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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606 size_t word_size) { |
| 2361 | 607 assert(isHumongous(word_size), "word_size should be humongous"); |
| 608 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 609 | |
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610 uint first = G1_NULL_HRS_INDEX; |
| 2152 | 611 if (num_regions == 1) { |
| 612 // Only one region to allocate, no need to go through the slower | |
| 10405 | 613 // path. The caller will attempt the expansion if this fails, so |
| 2152 | 614 // let's not try to expand here too. |
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615 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
| 2152 | 616 if (hr != NULL) { |
| 617 first = hr->hrs_index(); | |
| 618 } else { | |
| 3766 | 619 first = G1_NULL_HRS_INDEX; |
| 2152 | 620 } |
| 621 } else { | |
| 622 // We can't allocate humongous regions while cleanupComplete() is | |
| 623 // running, since some of the regions we find to be empty might not | |
| 624 // yet be added to the free list and it is not straightforward to | |
| 625 // know which list they are on so that we can remove them. Note | |
| 626 // that we only need to do this if we need to allocate more than | |
| 627 // one region to satisfy the current humongous allocation | |
| 628 // request. If we are only allocating one region we use the common | |
| 629 // region allocation code (see above). | |
| 630 wait_while_free_regions_coming(); | |
| 2361 | 631 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 632 |
| 633 if (free_regions() >= num_regions) { | |
| 3766 | 634 first = _hrs.find_contiguous(num_regions); |
| 635 if (first != G1_NULL_HRS_INDEX) { | |
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636 for (uint i = first; i < first + num_regions; ++i) { |
| 3766 | 637 HeapRegion* hr = region_at(i); |
| 2152 | 638 assert(hr->is_empty(), "sanity"); |
| 2361 | 639 assert(is_on_master_free_list(hr), "sanity"); |
| 2152 | 640 hr->set_pending_removal(true); |
| 641 } | |
| 642 _free_list.remove_all_pending(num_regions); | |
| 643 } | |
| 644 } | |
| 645 } | |
| 646 return first; | |
| 647 } | |
| 648 | |
| 2361 | 649 HeapWord* |
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650 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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651 uint num_regions, |
| 2361 | 652 size_t word_size) { |
| 3766 | 653 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
| 2361 | 654 assert(isHumongous(word_size), "word_size should be humongous"); |
| 655 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 656 | |
| 657 // Index of last region in the series + 1. | |
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658 uint last = first + num_regions; |
| 2361 | 659 |
| 660 // We need to initialize the region(s) we just discovered. This is | |
| 661 // a bit tricky given that it can happen concurrently with | |
| 662 // refinement threads refining cards on these regions and | |
| 663 // potentially wanting to refine the BOT as they are scanning | |
| 664 // those cards (this can happen shortly after a cleanup; see CR | |
| 665 // 6991377). So we have to set up the region(s) carefully and in | |
| 666 // a specific order. | |
| 667 | |
| 668 // The word size sum of all the regions we will allocate. | |
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669 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 670 assert(word_size <= word_size_sum, "sanity"); |
| 671 | |
| 672 // This will be the "starts humongous" region. | |
| 3766 | 673 HeapRegion* first_hr = region_at(first); |
| 2361 | 674 // The header of the new object will be placed at the bottom of |
| 675 // the first region. | |
| 676 HeapWord* new_obj = first_hr->bottom(); | |
| 677 // This will be the new end of the first region in the series that | |
| 10405 | 678 // should also match the end of the last region in the series. |
| 2361 | 679 HeapWord* new_end = new_obj + word_size_sum; |
| 680 // This will be the new top of the first region that will reflect | |
| 681 // this allocation. | |
| 682 HeapWord* new_top = new_obj + word_size; | |
| 683 | |
| 684 // First, we need to zero the header of the space that we will be | |
| 685 // allocating. When we update top further down, some refinement | |
| 686 // threads might try to scan the region. By zeroing the header we | |
| 687 // ensure that any thread that will try to scan the region will | |
| 688 // come across the zero klass word and bail out. | |
| 689 // | |
| 690 // NOTE: It would not have been correct to have used | |
| 691 // CollectedHeap::fill_with_object() and make the space look like | |
| 692 // an int array. The thread that is doing the allocation will | |
| 693 // later update the object header to a potentially different array | |
| 694 // type and, for a very short period of time, the klass and length | |
| 695 // fields will be inconsistent. This could cause a refinement | |
| 696 // thread to calculate the object size incorrectly. | |
| 697 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 698 | |
| 699 // We will set up the first region as "starts humongous". This | |
| 700 // will also update the BOT covering all the regions to reflect | |
| 701 // that there is a single object that starts at the bottom of the | |
| 702 // first region. | |
| 703 first_hr->set_startsHumongous(new_top, new_end); | |
| 704 | |
| 705 // Then, if there are any, we will set up the "continues | |
| 706 // humongous" regions. | |
| 707 HeapRegion* hr = NULL; | |
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708 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 709 hr = region_at(i); |
| 2361 | 710 hr->set_continuesHumongous(first_hr); |
| 711 } | |
| 712 // If we have "continues humongous" regions (hr != NULL), then the | |
| 713 // end of the last one should match new_end. | |
| 714 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 715 | |
| 716 // Up to this point no concurrent thread would have been able to | |
| 717 // do any scanning on any region in this series. All the top | |
| 718 // fields still point to bottom, so the intersection between | |
| 719 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 720 // update the top fields, we'll do a storestore to make sure that | |
| 721 // no thread sees the update to top before the zeroing of the | |
| 722 // object header and the BOT initialization. | |
| 723 OrderAccess::storestore(); | |
| 724 | |
| 725 // Now that the BOT and the object header have been initialized, | |
| 726 // we can update top of the "starts humongous" region. | |
| 727 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 728 "new_top should be in this region"); | |
| 729 first_hr->set_top(new_top); | |
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730 if (_hr_printer.is_active()) { |
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731 HeapWord* bottom = first_hr->bottom(); |
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732 HeapWord* end = first_hr->orig_end(); |
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733 if ((first + 1) == last) { |
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734 // the series has a single humongous region |
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735 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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736 } else { |
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737 // the series has more than one humongous regions |
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738 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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739 } |
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740 } |
| 2361 | 741 |
| 742 // Now, we will update the top fields of the "continues humongous" | |
| 743 // regions. The reason we need to do this is that, otherwise, | |
| 744 // these regions would look empty and this will confuse parts of | |
| 745 // G1. For example, the code that looks for a consecutive number | |
| 746 // of empty regions will consider them empty and try to | |
| 747 // re-allocate them. We can extend is_empty() to also include | |
| 748 // !continuesHumongous(), but it is easier to just update the top | |
| 749 // fields here. The way we set top for all regions (i.e., top == | |
| 750 // end for all regions but the last one, top == new_top for the | |
| 751 // last one) is actually used when we will free up the humongous | |
| 752 // region in free_humongous_region(). | |
| 753 hr = NULL; | |
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754 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 755 hr = region_at(i); |
| 2361 | 756 if ((i + 1) == last) { |
| 757 // last continues humongous region | |
| 758 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 759 "new_top should fall on this region"); | |
| 760 hr->set_top(new_top); | |
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761 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 762 } else { |
| 763 // not last one | |
| 764 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 765 hr->set_top(hr->end()); | |
|
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766 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 767 } |
| 768 } | |
| 769 // If we have continues humongous regions (hr != NULL), then the | |
| 770 // end of the last one should match new_end and its top should | |
| 771 // match new_top. | |
| 772 assert(hr == NULL || | |
| 773 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
| 774 | |
| 775 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 776 _summary_bytes_used += first_hr->used(); | |
| 777 _humongous_set.add(first_hr); | |
| 778 | |
| 779 return new_obj; | |
| 780 } | |
| 781 | |
| 342 | 782 // If could fit into free regions w/o expansion, try. |
| 783 // Otherwise, if can expand, do so. | |
| 784 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 785 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 786 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 787 | |
| 788 verify_region_sets_optional(); | |
| 342 | 789 |
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790 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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791 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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792 uint x_num = expansion_regions(); |
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793 uint fs = _hrs.free_suffix(); |
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794 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
| 3766 | 795 if (first == G1_NULL_HRS_INDEX) { |
| 2152 | 796 // The only thing we can do now is attempt expansion. |
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797 if (fs + x_num >= num_regions) { |
|
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798 // If the number of regions we're trying to allocate for this |
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799 // object is at most the number of regions in the free suffix, |
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800 // then the call to humongous_obj_allocate_find_first() above |
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801 // should have succeeded and we wouldn't be here. |
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802 // |
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803 // We should only be trying to expand when the free suffix is |
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804 // not sufficient for the object _and_ we have some expansion |
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805 // room available. |
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806 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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807 |
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808 ergo_verbose1(ErgoHeapSizing, |
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809 "attempt heap expansion", |
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810 ergo_format_reason("humongous allocation request failed") |
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811 ergo_format_byte("allocation request"), |
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812 word_size * HeapWordSize); |
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813 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
| 3766 | 814 // Even though the heap was expanded, it might not have |
| 815 // reached the desired size. So, we cannot assume that the | |
| 816 // allocation will succeed. | |
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817 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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818 } |
| 2152 | 819 } |
| 820 } | |
| 821 | |
| 2361 | 822 HeapWord* result = NULL; |
| 3766 | 823 if (first != G1_NULL_HRS_INDEX) { |
| 2361 | 824 result = |
| 825 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
| 826 assert(result != NULL, "it should always return a valid result"); | |
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827 |
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828 // A successful humongous object allocation changes the used space |
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829 // information of the old generation so we need to recalculate the |
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830 // sizes and update the jstat counters here. |
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831 g1mm()->update_sizes(); |
| 2152 | 832 } |
| 833 | |
| 834 verify_region_sets_optional(); | |
| 2361 | 835 |
| 836 return result; | |
| 342 | 837 } |
| 838 | |
| 1973 | 839 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 840 assert_heap_not_locked_and_not_at_safepoint(); | |
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841 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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842 |
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843 unsigned int dummy_gc_count_before; |
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844 int dummy_gclocker_retry_count = 0; |
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845 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
| 342 | 846 } |
| 847 | |
| 848 HeapWord* | |
| 849 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 850 bool* gc_overhead_limit_was_exceeded) { |
| 851 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 852 |
| 10405 | 853 // Loop until the allocation is satisfied, or unsatisfied after GC. |
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854 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
| 1973 | 855 unsigned int gc_count_before; |
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856 |
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857 HeapWord* result = NULL; |
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858 if (!isHumongous(word_size)) { |
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859 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
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860 } else { |
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861 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
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862 } |
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863 if (result != NULL) { |
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864 return result; |
| 342 | 865 } |
| 866 | |
| 867 // Create the garbage collection operation... | |
| 1973 | 868 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 869 // ...and get the VM thread to execute it. |
| 870 VMThread::execute(&op); | |
| 1973 | 871 |
| 872 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 873 // If the operation was successful we'll return the result even | |
| 874 // if it is NULL. If the allocation attempt failed immediately | |
| 875 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 876 HeapWord* result = op.result(); | |
| 877 if (result != NULL && !isHumongous(word_size)) { | |
| 878 // Allocations that take place on VM operations do not do any | |
| 879 // card dirtying and we have to do it here. We only have to do | |
| 880 // this for non-humongous allocations, though. | |
| 881 dirty_young_block(result, word_size); | |
| 882 } | |
| 342 | 883 return result; |
| 1973 | 884 } else { |
|
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885 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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886 return NULL; |
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887 } |
| 1973 | 888 assert(op.result() == NULL, |
| 889 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 890 } |
| 891 | |
| 892 // Give a warning if we seem to be looping forever. | |
| 893 if ((QueuedAllocationWarningCount > 0) && | |
| 894 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 895 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 896 } |
| 897 } | |
| 1973 | 898 |
| 899 ShouldNotReachHere(); | |
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900 return NULL; |
| 342 | 901 } |
| 902 | |
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903 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
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904 unsigned int *gc_count_before_ret, |
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905 int* gclocker_retry_count_ret) { |
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906 // Make sure you read the note in attempt_allocation_humongous(). |
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|
907 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
908 assert_heap_not_locked_and_not_at_safepoint(); |
|
abdfc822206f
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|
909 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
abdfc822206f
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tonyp
parents:
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diff
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|
910 "be called for humongous allocation requests"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
911 |
|
abdfc822206f
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changeset
|
912 // We should only get here after the first-level allocation attempt |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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|
913 // (attempt_allocation()) failed to allocate. |
|
abdfc822206f
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|
914 |
|
abdfc822206f
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parents:
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diff
changeset
|
915 // We will loop until a) we manage to successfully perform the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
916 // allocation or b) we successfully schedule a collection which |
|
abdfc822206f
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|
917 // fails to perform the allocation. b) is the only case when we'll |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
918 // return NULL. |
|
abdfc822206f
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|
919 HeapWord* result = NULL; |
|
abdfc822206f
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|
920 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
abdfc822206f
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|
921 bool should_try_gc; |
|
abdfc822206f
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parents:
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|
922 unsigned int gc_count_before; |
|
abdfc822206f
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|
923 |
|
abdfc822206f
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|
924 { |
|
abdfc822206f
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|
925 MutexLockerEx x(Heap_lock); |
|
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|
926 |
|
abdfc822206f
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|
927 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
abdfc822206f
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|
928 false /* bot_updates */); |
|
abdfc822206f
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|
929 if (result != NULL) { |
|
abdfc822206f
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|
930 return result; |
|
abdfc822206f
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diff
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|
931 } |
|
abdfc822206f
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parents:
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|
932 |
|
abdfc822206f
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parents:
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|
933 // If we reach here, attempt_allocation_locked() above failed to |
|
abdfc822206f
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|
934 // allocate a new region. So the mutator alloc region should be NULL. |
|
abdfc822206f
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|
935 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
|
abdfc822206f
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|
936 |
|
abdfc822206f
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|
937 if (GC_locker::is_active_and_needs_gc()) { |
|
abdfc822206f
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parents:
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|
938 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
|
939 // No need for an ergo verbose message here, |
|
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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parents:
3886
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|
940 // can_expand_young_list() does this when it returns true. |
|
2433
abdfc822206f
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|
941 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
|
abdfc822206f
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|
942 false /* bot_updates */); |
|
abdfc822206f
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parents:
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changeset
|
943 if (result != NULL) { |
|
abdfc822206f
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parents:
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diff
changeset
|
944 return result; |
|
abdfc822206f
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parents:
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diff
changeset
|
945 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
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|
946 } |
|
abdfc822206f
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parents:
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|
947 should_try_gc = false; |
|
abdfc822206f
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|
948 } else { |
|
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
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diff
changeset
|
949 // 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:
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changeset
|
950 // 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:
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diff
changeset
|
951 // 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
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parents:
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diff
changeset
|
952 // 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
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parents:
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changeset
|
953 // then retry the allocation. |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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changeset
|
954 if (GC_locker::needs_gc()) { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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parents:
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diff
changeset
|
955 should_try_gc = false; |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
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diff
changeset
|
956 } else { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
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diff
changeset
|
957 // 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
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changeset
|
958 gc_count_before = total_collections(); |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
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changeset
|
959 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
|
960 } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
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changeset
|
961 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
962 } |
|
abdfc822206f
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parents:
2432
diff
changeset
|
963 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
964 if (should_try_gc) { |
|
abdfc822206f
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tonyp
parents:
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diff
changeset
|
965 bool succeeded; |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
966 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
|
967 GCCause::_g1_inc_collection_pause); |
|
2433
abdfc822206f
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parents:
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diff
changeset
|
968 if (result != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
969 assert(succeeded, "only way to get back a non-NULL result"); |
|
abdfc822206f
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tonyp
parents:
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diff
changeset
|
970 return result; |
|
abdfc822206f
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tonyp
parents:
2432
diff
changeset
|
971 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
972 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
973 if (succeeded) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
974 // If we get here we successfully scheduled a collection which |
|
abdfc822206f
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parents:
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diff
changeset
|
975 // 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
|
976 // further. We'll just return NULL. |
|
abdfc822206f
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tonyp
parents:
2432
diff
changeset
|
977 MutexLockerEx x(Heap_lock); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
978 *gc_count_before_ret = total_collections(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
979 return NULL; |
|
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 } else { |
|
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
982 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
983 MutexLockerEx x(Heap_lock); |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
984 *gc_count_before_ret = total_collections(); |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
985 return NULL; |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
986 } |
|
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
987 // 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
|
988 // 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
|
989 // then retry the allocation. |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
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|
990 GC_locker::stall_until_clear(); |
|
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
991 (*gclocker_retry_count_ret) += 1; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
992 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
993 |
| 10405 | 994 // We can reach here if we were unsuccessful in scheduling a |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
995 // 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
|
996 // 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
|
997 // allocation attempt in case another thread successfully |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
998 // 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
|
999 // 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
|
1000 // follow-on attempt will be at the start of the next loop |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1001 // iteration (after taking the Heap_lock). |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1002 result = _mutator_alloc_region.attempt_allocation(word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1003 false /* bot_updates */); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
1004 if (result != NULL) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1005 return result; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1006 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1007 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1008 // 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
|
1009 if ((QueuedAllocationWarningCount > 0) && |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
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|
1010 (try_count % QueuedAllocationWarningCount == 0)) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
1011 warning("G1CollectedHeap::attempt_allocation_slow() " |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
1012 "retries %d times", try_count); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1013 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1014 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1015 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1016 ShouldNotReachHere(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1017 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
1018 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1019 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
1020 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
8853
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7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1021 unsigned int * gc_count_before_ret, |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1022 int* gclocker_retry_count_ret) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1023 // The structure of this method has a lot of similarities to |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1024 // attempt_allocation_slow(). The reason these two were not merged |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1025 // into a single one is that such a method would require several "if |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
1026 // allocation is not humongous do this, otherwise do that" |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1027 // conditional paths which would obscure its flow. In fact, an early |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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1028 // version of this code did use a unified method which was harder to |
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1029 // follow and, as a result, it had subtle bugs that were hard to |
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1030 // track down. So keeping these two methods separate allows each to |
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1031 // be more readable. It will be good to keep these two in sync as |
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1032 // much as possible. |
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1033 |
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1034 assert_heap_not_locked_and_not_at_safepoint(); |
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1035 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
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1036 "should only be called for humongous allocations"); |
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1037 |
|
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1038 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
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1039 // need to start a marking cycle at each humongous object allocation. We do |
|
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1040 // the check before we do the actual allocation. The reason for doing it |
|
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1041 // before the allocation is that we avoid having to keep track of the newly |
|
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1042 // allocated memory while we do a GC. |
|
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1043 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
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1044 word_size)) { |
|
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1045 collect(GCCause::_g1_humongous_allocation); |
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1046 } |
|
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1047 |
|
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1048 // We will loop until a) we manage to successfully perform the |
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1049 // allocation or b) we successfully schedule a collection which |
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1050 // fails to perform the allocation. b) is the only case when we'll |
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1051 // return NULL. |
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1052 HeapWord* result = NULL; |
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1053 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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1054 bool should_try_gc; |
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1055 unsigned int gc_count_before; |
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1056 |
|
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1057 { |
|
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1058 MutexLockerEx x(Heap_lock); |
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1059 |
|
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1060 // Given that humongous objects are not allocated in young |
|
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1061 // regions, we'll first try to do the allocation without doing a |
|
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1062 // collection hoping that there's enough space in the heap. |
|
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1063 result = humongous_obj_allocate(word_size); |
|
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1064 if (result != NULL) { |
|
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1065 return result; |
|
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1066 } |
|
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1067 |
|
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1068 if (GC_locker::is_active_and_needs_gc()) { |
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1069 should_try_gc = false; |
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1070 } else { |
|
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1071 // The GCLocker may not be active but the GCLocker initiated |
|
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1072 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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1073 // returns true). In this case we do not try this GC and |
|
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1074 // wait until the GCLocker initiated GC is performed, and |
|
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1075 // then retry the allocation. |
|
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1076 if (GC_locker::needs_gc()) { |
|
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1077 should_try_gc = false; |
|
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1078 } else { |
|
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1079 // Read the GC count while still holding the Heap_lock. |
|
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1080 gc_count_before = total_collections(); |
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1081 should_try_gc = true; |
|
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1082 } |
|
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1083 } |
|
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1084 } |
|
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1085 |
|
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1086 if (should_try_gc) { |
|
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1087 // If we failed to allocate the humongous object, we should try to |
|
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1088 // do a collection pause (if we're allowed) in case it reclaims |
|
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1089 // enough space for the allocation to succeed after the pause. |
|
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1090 |
|
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|
1091 bool succeeded; |
|
12113
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|
1092 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
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|
1093 GCCause::_g1_humongous_allocation); |
|
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1094 if (result != NULL) { |
|
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|
1095 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
1096 return result; |
|
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|
1097 } |
|
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|
1098 |
|
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1099 if (succeeded) { |
|
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1100 // If we get here we successfully scheduled a collection which |
|
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1101 // failed to allocate. No point in trying to allocate |
|
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1102 // further. We'll just return NULL. |
|
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1103 MutexLockerEx x(Heap_lock); |
|
4910
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1104 *gc_count_before_ret = total_collections(); |
|
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1105 return NULL; |
|
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1106 } |
|
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1107 } else { |
|
8853
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1108 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
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1109 MutexLockerEx x(Heap_lock); |
|
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1110 *gc_count_before_ret = total_collections(); |
|
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1111 return NULL; |
|
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1112 } |
|
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1113 // The GCLocker is either active or the GCLocker initiated |
|
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1114 // GC has not yet been performed. Stall until it is and |
|
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1115 // then retry the allocation. |
|
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1116 GC_locker::stall_until_clear(); |
|
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1117 (*gclocker_retry_count_ret) += 1; |
|
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1118 } |
|
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1119 |
| 10405 | 1120 // We can reach here if we were unsuccessful in scheduling a |
|
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1121 // collection (because another thread beat us to it) or if we were |
|
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1122 // stalled due to the GC locker. In either can we should retry the |
|
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1123 // allocation attempt in case another thread successfully |
|
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1124 // performed a collection and reclaimed enough space. Give a |
|
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1125 // warning if we seem to be looping forever. |
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1126 |
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1127 if ((QueuedAllocationWarningCount > 0) && |
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1128 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1129 warning("G1CollectedHeap::attempt_allocation_humongous() " |
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1130 "retries %d times", try_count); |
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1131 } |
|
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1132 } |
|
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1133 |
|
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1134 ShouldNotReachHere(); |
|
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1135 return NULL; |
|
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1136 } |
|
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1137 |
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1138 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
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1139 bool expect_null_mutator_alloc_region) { |
| 2152 | 1140 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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1141 assert(_mutator_alloc_region.get() == NULL || |
|
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1142 !expect_null_mutator_alloc_region, |
|
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1143 "the current alloc region was unexpectedly found to be non-NULL"); |
|
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1144 |
|
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1145 if (!isHumongous(word_size)) { |
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1146 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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1147 false /* bot_updates */); |
|
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1148 } else { |
|
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1149 HeapWord* result = humongous_obj_allocate(word_size); |
|
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1150 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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1151 g1_policy()->set_initiate_conc_mark_if_possible(); |
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1152 } |
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1153 return result; |
|
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1154 } |
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1155 |
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1156 ShouldNotReachHere(); |
| 342 | 1157 } |
| 1158 | |
| 1159 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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1160 G1CollectedHeap* _g1h; |
| 342 | 1161 ModRefBarrierSet* _mr_bs; |
| 1162 public: | |
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1163 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
| 12080 | 1164 _g1h(g1h), _mr_bs(mr_bs) {} |
| 1165 | |
| 342 | 1166 bool doHeapRegion(HeapRegion* r) { |
| 12080 | 1167 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1168 | |
|
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1169 if (r->continuesHumongous()) { |
| 12080 | 1170 // We'll assert that the strong code root list and RSet is empty |
| 1171 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
| 1172 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
| 342 | 1173 return false; |
|
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1174 } |
| 12080 | 1175 |
|
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1176 _g1h->reset_gc_time_stamps(r); |
| 12080 | 1177 hrrs->clear(); |
| 342 | 1178 // You might think here that we could clear just the cards |
| 1179 // corresponding to the used region. But no: if we leave a dirty card | |
| 1180 // in a region we might allocate into, then it would prevent that card | |
| 1181 // from being enqueued, and cause it to be missed. | |
| 1182 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1183 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 12080 | 1184 |
| 342 | 1185 return false; |
| 1186 } | |
| 1187 }; | |
| 1188 | |
|
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1189 void G1CollectedHeap::clear_rsets_post_compaction() { |
| 12343 | 1190 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
|
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1191 heap_region_iterate(&rs_clear); |
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1192 } |
| 342 | 1193 |
|
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1194 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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1195 G1CollectedHeap* _g1h; |
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1196 UpdateRSOopClosure _cl; |
|
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1197 int _worker_i; |
|
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1198 public: |
|
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1199 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1200 _cl(g1->g1_rem_set(), worker_i), |
|
626
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1201 _worker_i(worker_i), |
|
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1202 _g1h(g1) |
|
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|
1203 { } |
|
1960
878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
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|
1204 |
|
626
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1205 bool doHeapRegion(HeapRegion* r) { |
|
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1206 if (!r->continuesHumongous()) { |
|
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1207 _cl.set_from(r); |
|
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1208 r->oop_iterate(&_cl); |
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1209 } |
|
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1210 return false; |
|
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1211 } |
|
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1212 }; |
|
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1213 |
|
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1214 class ParRebuildRSTask: public AbstractGangTask { |
|
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1215 G1CollectedHeap* _g1; |
|
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1216 public: |
|
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1217 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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1218 : AbstractGangTask("ParRebuildRSTask"), |
|
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1219 _g1(g1) |
|
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1220 { } |
|
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1221 |
|
4728
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1222 void work(uint worker_id) { |
|
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1223 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
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1224 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
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|
1225 _g1->workers()->active_workers(), |
|
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1226 HeapRegion::RebuildRSClaimValue); |
|
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|
1227 } |
|
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|
1228 }; |
|
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|
1229 |
|
3778
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1230 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
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1231 private: |
|
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1232 G1HRPrinter* _hr_printer; |
|
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1233 public: |
|
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|
1234 bool doHeapRegion(HeapRegion* hr) { |
|
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|
1235 assert(!hr->is_young(), "not expecting to find young regions"); |
|
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|
1236 // We only generate output for non-empty regions. |
|
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1237 if (!hr->is_empty()) { |
|
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1238 if (!hr->isHumongous()) { |
|
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|
1239 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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|
1240 } else if (hr->startsHumongous()) { |
|
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1241 if (hr->region_num() == 1) { |
|
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1242 // single humongous region |
|
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|
1243 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
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1244 } else { |
|
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|
1245 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
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|
1246 } |
|
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|
1247 } else { |
|
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|
1248 assert(hr->continuesHumongous(), "only way to get here"); |
|
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|
1249 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
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|
1250 } |
|
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|
1251 } |
|
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|
1252 return false; |
|
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|
1253 } |
|
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|
1254 |
|
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|
1255 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
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|
1256 : _hr_printer(hr_printer) { } |
|
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|
1257 }; |
|
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|
1258 |
|
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1259 void G1CollectedHeap::print_hrs_post_compaction() { |
|
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|
1260 PostCompactionPrinterClosure cl(hr_printer()); |
|
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|
1261 heap_region_iterate(&cl); |
|
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|
1262 } |
|
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|
1263 |
| 1973 | 1264 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
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|
1265 bool clear_all_soft_refs, |
| 342 | 1266 size_t word_size) { |
| 2152 | 1267 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1268 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
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|
1269 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1270 return false; |
|
1359
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|
1271 } |
|
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|
1272 |
| 10405 | 1273 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
|
13400
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|
1274 gc_timer->register_gc_start(); |
| 10405 | 1275 |
| 1276 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
| 1277 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
| 1278 | |
|
2125
7246a374a9f2
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|
1279 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1280 ResourceMark rm; |
| 1281 | |
|
4872
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|
1282 print_heap_before_gc(); |
| 10405 | 1283 trace_heap_before_gc(gc_tracer); |
|
838
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|
1284 |
|
17866
270d7cb38f40
8038934: Remove prefix allocated_ from methods and variables in Metaspace
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|
1285 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
|
6725
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|
1286 |
| 2152 | 1287 verify_region_sets_optional(); |
| 342 | 1288 |
|
1387
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|
1289 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
|
0bfd3fb24150
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|
1290 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
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|
1291 |
|
0bfd3fb24150
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|
1292 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
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|
1293 |
| 342 | 1294 { |
| 1295 IsGCActiveMark x; | |
| 1296 | |
| 1297 // Timing | |
| 6030 | 1298 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
|
6007
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|
1299 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
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|
1300 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1301 |
| 342 | 1302 { |
|
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1303 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL, gc_tracer->gc_id()); |
|
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1304 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
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1305 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
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|
1306 |
|
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|
1307 double start = os::elapsedTime(); |
|
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1308 g1_policy()->record_full_collection_start(); |
|
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|
1309 |
|
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|
1310 // Note: When we have a more flexible GC logging framework that |
|
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1311 // allows us to add optional attributes to a GC log record we |
|
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1312 // could consider timing and reporting how long we wait in the |
|
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|
1313 // following two methods. |
|
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|
1314 wait_while_free_regions_coming(); |
|
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1315 // If we start the compaction before the CM threads finish |
|
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1316 // scanning the root regions we might trip them over as we'll |
|
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1317 // be moving objects / updating references. So let's wait until |
|
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1318 // they are done. By telling them to abort, they should complete |
|
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1319 // early. |
|
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|
1320 _cm->root_regions()->abort(); |
|
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|
1321 _cm->root_regions()->wait_until_scan_finished(); |
|
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1322 append_secondary_free_list_if_not_empty_with_lock(); |
|
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|
1323 |
|
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|
1324 gc_prologue(true); |
|
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|
1325 increment_total_collections(true /* full gc */); |
|
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|
1326 increment_old_marking_cycles_started(); |
|
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|
1327 |
|
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|
1328 assert(used() == recalculate_used(), "Should be equal"); |
|
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|
1329 |
|
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|
1330 verify_before_gc(); |
|
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|
1331 |
| 10405 | 1332 pre_full_gc_dump(gc_timer); |
|
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1333 |
|
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|
1334 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
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|
1335 |
|
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|
1336 // Disable discovery and empty the discovered lists |
|
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|
1337 // for the CM ref processor. |
|
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|
1338 ref_processor_cm()->disable_discovery(); |
|
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|
1339 ref_processor_cm()->abandon_partial_discovery(); |
|
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|
1340 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1341 |
|
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|
1342 // Abandon current iterations of concurrent marking and concurrent |
|
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1343 // refinement, if any are in progress. We have to do this before |
|
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|
1344 // wait_until_scan_finished() below. |
|
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|
1345 concurrent_mark()->abort(); |
|
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|
1346 |
|
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|
1347 // Make sure we'll choose a new allocation region afterwards. |
|
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|
1348 release_mutator_alloc_region(); |
|
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|
1349 abandon_gc_alloc_regions(); |
|
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|
1350 g1_rem_set()->cleanupHRRS(); |
|
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|
1351 |
|
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|
1352 // We should call this after we retire any currently active alloc |
|
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|
1353 // regions so that all the ALLOC / RETIRE events are generated |
|
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1354 // before the start GC event. |
|
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|
1355 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
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|
1356 |
|
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|
1357 // We may have added regions to the current incremental collection |
|
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|
1358 // set between the last GC or pause and now. We need to clear the |
|
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|
1359 // incremental collection set and then start rebuilding it afresh |
|
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|
1360 // after this full GC. |
|
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|
1361 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
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|
1362 g1_policy()->clear_incremental_cset(); |
|
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|
1363 g1_policy()->stop_incremental_cset_building(); |
|
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|
1364 |
|
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|
1365 tear_down_region_sets(false /* free_list_only */); |
|
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|
1366 g1_policy()->set_gcs_are_young(true); |
|
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|
1367 |
|
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|
1368 // See the comments in g1CollectedHeap.hpp and |
|
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|
1369 // G1CollectedHeap::ref_processing_init() about |
|
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|
1370 // how reference processing currently works in G1. |
|
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|
1371 |
|
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|
1372 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
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|
1373 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
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|
1374 |
|
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|
1375 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
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|
1376 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
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|
1377 |
|
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|
1378 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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|
1379 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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|
1380 |
|
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|
1381 // Do collection work |
|
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|
1382 { |
|
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|
1383 HandleMark hm; // Discard invalid handles created during gc |
|
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|
1384 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
|
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|
1385 } |
|
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|
1386 |
|
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|
1387 assert(free_regions() == 0, "we should not have added any free regions"); |
|
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|
1388 rebuild_region_sets(false /* free_list_only */); |
|
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|
1389 |
|
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|
1390 // Enqueue any discovered reference objects that have |
|
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|
1391 // not been removed from the discovered lists. |
|
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|
1392 ref_processor_stw()->enqueue_discovered_references(); |
|
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|
1393 |
|
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|
1394 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
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|
1395 |
|
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|
1396 MemoryService::track_memory_usage(); |
|
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|
1397 |
|
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|
1398 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
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|
1399 ref_processor_stw()->verify_no_references_recorded(); |
|
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|
1400 |
|
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|
1401 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
|
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|
1402 ClassLoaderDataGraph::purge(); |
| 12080 | 1403 MetaspaceAux::verify_metrics(); |
|
10098
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|
1404 |
|
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|
1405 // Note: since we've just done a full GC, concurrent |
|
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1406 // marking is no longer active. Therefore we need not |
|
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|
1407 // re-enable reference discovery for the CM ref processor. |
|
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1408 // That will be done at the start of the next marking cycle. |
|
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|
1409 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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|
1410 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1411 |
|
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|
1412 reset_gc_time_stamp(); |
|
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|
1413 // Since everything potentially moved, we will clear all remembered |
| 10405 | 1414 // sets, and clear all cards. Later we will rebuild remembered |
|
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1415 // sets. We will also reset the GC time stamps of the regions. |
|
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|
1416 clear_rsets_post_compaction(); |
|
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|
1417 check_gc_time_stamps(); |
|
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|
1418 |
|
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|
1419 // Resize the heap if necessary. |
|
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|
1420 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
|
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|
1421 |
|
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1422 if (_hr_printer.is_active()) { |
|
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1423 // We should do this after we potentially resize the heap so |
|
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1424 // that all the COMMIT / UNCOMMIT events are generated before |
|
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|
1425 // the end GC event. |
|
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|
1426 |
|
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|
1427 print_hrs_post_compaction(); |
|
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|
1428 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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|
1429 } |
|
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|
1430 |
|
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|
1431 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
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|
1432 if (hot_card_cache->use_cache()) { |
|
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|
1433 hot_card_cache->reset_card_counts(); |
|
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|
1434 hot_card_cache->reset_hot_cache(); |
|
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|
1435 } |
|
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|
1436 |
|
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|
1437 // Rebuild remembered sets of all regions. |
|
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|
1438 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
1439 uint n_workers = |
|
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|
1440 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1441 workers()->active_workers(), |
|
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|
1442 Threads::number_of_non_daemon_threads()); |
|
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|
1443 assert(UseDynamicNumberOfGCThreads || |
|
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|
1444 n_workers == workers()->total_workers(), |
|
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|
1445 "If not dynamic should be using all the workers"); |
|
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|
1446 workers()->set_active_workers(n_workers); |
|
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|
1447 // Set parallel threads in the heap (_n_par_threads) only |
|
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1448 // before a parallel phase and always reset it to 0 after |
|
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1449 // the phase so that the number of parallel threads does |
|
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1450 // no get carried forward to a serial phase where there |
|
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|
1451 // may be code that is "possibly_parallel". |
|
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|
1452 set_par_threads(n_workers); |
|
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|
1453 |
|
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|
1454 ParRebuildRSTask rebuild_rs_task(this); |
|
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|
1455 assert(check_heap_region_claim_values( |
|
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|
1456 HeapRegion::InitialClaimValue), "sanity check"); |
|
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|
1457 assert(UseDynamicNumberOfGCThreads || |
|
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|
1458 workers()->active_workers() == workers()->total_workers(), |
|
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|
1459 "Unless dynamic should use total workers"); |
|
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|
1460 // Use the most recent number of active workers |
|
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|
1461 assert(workers()->active_workers() > 0, |
|
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|
1462 "Active workers not properly set"); |
|
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|
1463 set_par_threads(workers()->active_workers()); |
|
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|
1464 workers()->run_task(&rebuild_rs_task); |
|
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|
1465 set_par_threads(0); |
|
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|
1466 assert(check_heap_region_claim_values( |
|
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|
1467 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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|
1468 reset_heap_region_claim_values(); |
|
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|
1469 } else { |
|
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|
1470 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1471 heap_region_iterate(&rebuild_rs); |
|
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1472 } |
|
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|
1473 |
| 12080 | 1474 // Rebuild the strong code root lists for each region |
| 1475 rebuild_strong_code_roots(); | |
| 1476 | |
|
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|
1477 if (true) { // FIXME |
|
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|
1478 MetaspaceGC::compute_new_size(); |
|
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1479 } |
| 342 | 1480 |
|
546
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|
1481 #ifdef TRACESPINNING |
|
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|
1482 ParallelTaskTerminator::print_termination_counts(); |
|
546
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|
1483 #endif |
|
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|
1484 |
|
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|
1485 // Discard all rset updates |
|
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|
1486 JavaThread::dirty_card_queue_set().abandon_logs(); |
|
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|
1487 assert(!G1DeferredRSUpdate |
|
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1488 || (G1DeferredRSUpdate && |
|
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|
1489 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
|
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|
1490 |
|
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|
1491 _young_list->reset_sampled_info(); |
|
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|
1492 // At this point there should be no regions in the |
|
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|
1493 // entire heap tagged as young. |
|
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|
1494 assert(check_young_list_empty(true /* check_heap */), |
|
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|
1495 "young list should be empty at this point"); |
|
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|
1496 |
|
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|
1497 // Update the number of full collections that have been completed. |
|
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|
1498 increment_old_marking_cycles_completed(false /* concurrent */); |
|
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|
1499 |
|
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|
1500 _hrs.verify_optional(); |
|
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|
1501 verify_region_sets_optional(); |
|
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|
1502 |
|
10373
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|
1503 verify_after_gc(); |
|
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|
1504 |
|
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|
1505 // Start a new incremental collection set for the next pause |
|
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|
1506 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
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|
1507 g1_policy()->start_incremental_cset_building(); |
|
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|
1508 |
|
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|
1509 clear_cset_fast_test(); |
|
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|
1510 |
|
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|
1511 init_mutator_alloc_region(); |
|
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|
1512 |
|
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|
1513 double end = os::elapsedTime(); |
|
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|
1514 g1_policy()->record_full_collection_end(); |
|
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|
1515 |
|
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|
1516 if (G1Log::fine()) { |
|
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|
1517 g1_policy()->print_heap_transition(); |
|
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|
1518 } |
|
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|
1519 |
|
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|
1520 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
|
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|
1521 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
|
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|
1522 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
|
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|
1523 // before any GC notifications are raised. |
|
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|
1524 g1mm()->update_sizes(); |
|
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|
1525 |
|
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|
1526 gc_epilogue(true); |
|
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|
1527 } |
|
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|
1528 |
|
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|
1529 if (G1Log::finer()) { |
|
10291
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|
1530 g1_policy()->print_detailed_heap_transition(true /* full */); |
|
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|
1531 } |
|
6121
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1532 |
|
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|
1533 print_heap_after_gc(); |
| 10405 | 1534 trace_heap_after_gc(gc_tracer); |
| 1535 | |
| 1536 post_full_gc_dump(gc_timer); | |
| 1537 | |
|
13400
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|
1538 gc_timer->register_gc_end(); |
| 10405 | 1539 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
|
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1540 } |
| 1973 | 1541 |
| 1542 return true; | |
| 342 | 1543 } |
| 1544 | |
| 1545 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1546 // do_collection() will return whether it succeeded in performing |
| 1547 // the GC. Currently, there is no facility on the | |
| 1548 // do_full_collection() API to notify the caller than the collection | |
| 1549 // did not succeed (e.g., because it was locked out by the GC | |
| 1550 // locker). So, right now, we'll ignore the return value. | |
| 1551 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1552 clear_all_soft_refs, | |
| 1553 0 /* word_size */); | |
| 342 | 1554 } |
| 1555 | |
| 1556 // This code is mostly copied from TenuredGeneration. | |
| 1557 void | |
| 1558 G1CollectedHeap:: | |
| 1559 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1560 // Include the current allocation, if any, and bytes that will be | |
| 1561 // pre-allocated to support collections, as "used". | |
| 1562 const size_t used_after_gc = used(); | |
| 1563 const size_t capacity_after_gc = capacity(); | |
| 1564 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1565 | |
|
1717
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1566 // This is enforced in arguments.cpp. |
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1567 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1568 "otherwise the code below doesn't make sense"); |
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1569 |
| 342 | 1570 // We don't have floating point command-line arguments |
|
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1571 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1572 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
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1573 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1574 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1575 | |
|
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1576 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1577 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1578 |
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1579 // We have to be careful here as these two calculations can overflow |
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1580 // 32-bit size_t's. |
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1581 double used_after_gc_d = (double) used_after_gc; |
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1582 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1583 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1584 |
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1585 // Let's make sure that they are both under the max heap size, which |
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1586 // by default will make them fit into a size_t. |
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1587 double desired_capacity_upper_bound = (double) max_heap_size; |
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1588 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1589 desired_capacity_upper_bound); |
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1590 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1591 desired_capacity_upper_bound); |
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1592 |
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1593 // We can now safely turn them into size_t's. |
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1594 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1595 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1596 |
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1597 // This assert only makes sense here, before we adjust them |
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1598 // with respect to the min and max heap size. |
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1599 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1600 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1601 "maximum_desired_capacity = "SIZE_FORMAT, |
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1602 minimum_desired_capacity, maximum_desired_capacity)); |
|
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1603 |
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1604 // Should not be greater than the heap max size. No need to adjust |
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1605 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1606 // we'll try to make the capacity larger than it, not smaller). |
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1607 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1608 // Should not be less than the heap min size. No need to adjust it |
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1609 // with respect to the heap max size as it's an upper bound (i.e., |
|
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1610 // we'll try to make the capacity smaller than it, not greater). |
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1611 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1612 |
|
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1613 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1614 // Don't expand unless it's significant |
| 1615 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1616 ergo_verbose4(ErgoHeapSizing, |
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1617 "attempt heap expansion", |
|
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1618 ergo_format_reason("capacity lower than " |
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1619 "min desired capacity after Full GC") |
|
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1620 ergo_format_byte("capacity") |
|
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1621 ergo_format_byte("occupancy") |
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1622 ergo_format_byte_perc("min desired capacity"), |
|
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1623 capacity_after_gc, used_after_gc, |
|
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1624 minimum_desired_capacity, (double) MinHeapFreeRatio); |
|
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1625 expand(expand_bytes); |
| 342 | 1626 |
| 1627 // No expansion, now see if we want to shrink | |
|
1717
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|
1628 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1629 // Capacity too large, compute shrinking size |
| 1630 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1631 ergo_verbose4(ErgoHeapSizing, |
|
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1632 "attempt heap shrinking", |
|
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|
1633 ergo_format_reason("capacity higher than " |
|
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|
1634 "max desired capacity after Full GC") |
|
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|
1635 ergo_format_byte("capacity") |
|
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|
1636 ergo_format_byte("occupancy") |
|
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|
1637 ergo_format_byte_perc("max desired capacity"), |
|
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|
1638 capacity_after_gc, used_after_gc, |
|
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|
1639 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1640 shrink(shrink_bytes); |
| 1641 } | |
| 1642 } | |
| 1643 | |
| 1644 | |
| 1645 HeapWord* | |
| 1973 | 1646 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1647 bool* succeeded) { | |
| 2152 | 1648 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1649 |
| 1650 *succeeded = true; | |
| 1651 // Let's attempt the allocation first. | |
|
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|
1652 HeapWord* result = |
|
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|
1653 attempt_allocation_at_safepoint(word_size, |
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|
1654 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1655 if (result != NULL) { |
| 1656 assert(*succeeded, "sanity"); | |
| 1657 return result; | |
| 1658 } | |
| 342 | 1659 |
| 1660 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1661 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1662 // expansion over collection. (This might change in the future if we can | |
| 1663 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1664 result = expand_and_allocate(word_size); | |
| 1665 if (result != NULL) { | |
| 1973 | 1666 assert(*succeeded, "sanity"); |
| 342 | 1667 return result; |
| 1668 } | |
| 1669 | |
| 1973 | 1670 // Expansion didn't work, we'll try to do a Full GC. |
| 1671 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1672 false, /* clear_all_soft_refs */ | |
| 1673 word_size); | |
| 1674 if (!gc_succeeded) { | |
| 1675 *succeeded = false; | |
| 1676 return NULL; | |
| 1677 } | |
| 1678 | |
| 1679 // Retry the allocation | |
| 1680 result = attempt_allocation_at_safepoint(word_size, | |
|
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|
1681 true /* expect_null_mutator_alloc_region */); |
| 342 | 1682 if (result != NULL) { |
| 1973 | 1683 assert(*succeeded, "sanity"); |
| 342 | 1684 return result; |
| 1685 } | |
| 1686 | |
| 1973 | 1687 // Then, try a Full GC that will collect all soft references. |
| 1688 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1689 true, /* clear_all_soft_refs */ | |
| 1690 word_size); | |
| 1691 if (!gc_succeeded) { | |
| 1692 *succeeded = false; | |
| 1693 return NULL; | |
| 1694 } | |
| 1695 | |
| 1696 // Retry the allocation once more | |
| 1697 result = attempt_allocation_at_safepoint(word_size, | |
|
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|
1698 true /* expect_null_mutator_alloc_region */); |
| 342 | 1699 if (result != NULL) { |
| 1973 | 1700 assert(*succeeded, "sanity"); |
| 342 | 1701 return result; |
| 1702 } | |
| 1703 | |
|
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|
1704 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1705 "Flag should have been handled and cleared prior to this point"); |
|
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|
1706 |
| 342 | 1707 // What else? We might try synchronous finalization later. If the total |
| 1708 // space available is large enough for the allocation, then a more | |
| 1709 // complete compaction phase than we've tried so far might be | |
| 1710 // appropriate. | |
| 1973 | 1711 assert(*succeeded, "sanity"); |
| 342 | 1712 return NULL; |
| 1713 } | |
| 1714 | |
| 1715 // Attempting to expand the heap sufficiently | |
| 1716 // to support an allocation of the given "word_size". If | |
| 1717 // successful, perform the allocation and return the address of the | |
| 1718 // allocated block, or else "NULL". | |
| 1719 | |
| 1720 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1721 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1722 | |
| 1723 verify_region_sets_optional(); | |
| 1973 | 1724 |
|
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|
1725 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1726 ergo_verbose1(ErgoHeapSizing, |
|
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1727 "attempt heap expansion", |
|
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|
1728 ergo_format_reason("allocation request failed") |
|
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|
1729 ergo_format_byte("allocation request"), |
|
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1730 word_size * HeapWordSize); |
|
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1731 if (expand(expand_bytes)) { |
| 3766 | 1732 _hrs.verify_optional(); |
|
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1733 verify_region_sets_optional(); |
|
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1734 return attempt_allocation_at_safepoint(word_size, |
|
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1735 false /* expect_null_mutator_alloc_region */); |
|
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1736 } |
|
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|
1737 return NULL; |
| 342 | 1738 } |
| 1739 | |
| 3766 | 1740 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
| 1741 HeapWord* new_end) { | |
| 1742 assert(old_end != new_end, "don't call this otherwise"); | |
| 1743 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
| 1744 | |
| 1745 // Update the committed mem region. | |
| 1746 _g1_committed.set_end(new_end); | |
| 1747 // Tell the card table about the update. | |
| 1748 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
| 1749 // Tell the BOT about the update. | |
| 1750 _bot_shared->resize(_g1_committed.word_size()); | |
|
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|
1751 // Tell the hot card cache about the update |
|
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|
1752 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
| 3766 | 1753 } |
| 1754 | |
|
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1755 bool G1CollectedHeap::expand(size_t expand_bytes) { |
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1756 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1757 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1758 HeapRegion::GrainBytes); | |
|
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1759 ergo_verbose2(ErgoHeapSizing, |
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1760 "expand the heap", |
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1761 ergo_format_byte("requested expansion amount") |
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1762 ergo_format_byte("attempted expansion amount"), |
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1763 expand_bytes, aligned_expand_bytes); |
|
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1764 |
|
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1765 if (_g1_storage.uncommitted_size() == 0) { |
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1766 ergo_verbose0(ErgoHeapSizing, |
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1767 "did not expand the heap", |
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1768 ergo_format_reason("heap already fully expanded")); |
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1769 return false; |
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1770 } |
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1771 |
| 3766 | 1772 // First commit the memory. |
| 1773 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
|
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1774 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1775 if (successful) { |
| 3766 | 1776 // Then propagate this update to the necessary data structures. |
| 1777 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
| 1778 update_committed_space(old_end, new_end); | |
| 1779 | |
| 1780 FreeRegionList expansion_list("Local Expansion List"); | |
| 1781 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
| 1782 assert(mr.start() == old_end, "post-condition"); | |
| 1783 // mr might be a smaller region than what was requested if | |
| 1784 // expand_by() was unable to allocate the HeapRegion instances | |
| 1785 assert(mr.end() <= new_end, "post-condition"); | |
| 1786 | |
| 1787 size_t actual_expand_bytes = mr.byte_size(); | |
| 1788 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
| 1789 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
| 1790 "post-condition"); | |
| 1791 if (actual_expand_bytes < aligned_expand_bytes) { | |
| 1792 // We could not expand _hrs to the desired size. In this case we | |
| 1793 // need to shrink the committed space accordingly. | |
| 1794 assert(mr.end() < new_end, "invariant"); | |
| 1795 | |
| 1796 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
| 1797 // First uncommit the memory. | |
| 1798 _g1_storage.shrink_by(diff_bytes); | |
| 1799 // Then propagate this update to the necessary data structures. | |
| 1800 update_committed_space(new_end, mr.end()); | |
|
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1801 } |
| 3766 | 1802 _free_list.add_as_tail(&expansion_list); |
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1803 |
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1804 if (_hr_printer.is_active()) { |
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1805 HeapWord* curr = mr.start(); |
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1806 while (curr < mr.end()) { |
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1807 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1808 _hr_printer.commit(curr, curr_end); |
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1809 curr = curr_end; |
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1810 } |
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1811 assert(curr == mr.end(), "post-condition"); |
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1812 } |
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1813 g1_policy()->record_new_heap_size(n_regions()); |
|
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1814 } else { |
|
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1815 ergo_verbose0(ErgoHeapSizing, |
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1816 "did not expand the heap", |
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1817 ergo_format_reason("heap expansion operation failed")); |
|
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1818 // The expansion of the virtual storage space was unsuccessful. |
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1819 // Let's see if it was because we ran out of swap. |
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1820 if (G1ExitOnExpansionFailure && |
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1821 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1822 // We had head room... |
|
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1823 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
| 342 | 1824 } |
| 1825 } | |
|
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1826 return successful; |
| 342 | 1827 } |
| 1828 | |
| 3766 | 1829 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1830 size_t aligned_shrink_bytes = |
| 1831 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1832 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1833 HeapRegion::GrainBytes); | |
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1834 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1835 |
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1836 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
| 3766 | 1837 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
|
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1838 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1839 |
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1840 ergo_verbose3(ErgoHeapSizing, |
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1841 "shrink the heap", |
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1842 ergo_format_byte("requested shrinking amount") |
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1843 ergo_format_byte("aligned shrinking amount") |
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1844 ergo_format_byte("attempted shrinking amount"), |
|
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1845 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1846 if (num_regions_removed > 0) { |
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1847 _g1_storage.shrink_by(shrunk_bytes); |
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1848 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1849 |
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1850 if (_hr_printer.is_active()) { |
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1851 HeapWord* curr = old_end; |
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1852 while (curr > new_end) { |
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1853 HeapWord* curr_end = curr; |
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1854 curr -= HeapRegion::GrainWords; |
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1855 _hr_printer.uncommit(curr, curr_end); |
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1856 } |
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1857 } |
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1858 |
|
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1859 _expansion_regions += num_regions_removed; |
| 3766 | 1860 update_committed_space(old_end, new_end); |
| 1861 HeapRegionRemSet::shrink_heap(n_regions()); | |
|
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1862 g1_policy()->record_new_heap_size(n_regions()); |
|
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1863 } else { |
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1864 ergo_verbose0(ErgoHeapSizing, |
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1865 "did not shrink the heap", |
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1866 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1867 } |
| 1868 } | |
| 1869 | |
| 1870 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1871 verify_region_sets_optional(); |
| 1872 | |
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1873 // We should only reach here at the end of a Full GC which means we |
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1874 // should not not be holding to any GC alloc regions. The method |
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1875 // below will make sure of that and do any remaining clean up. |
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1876 abandon_gc_alloc_regions(); |
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1877 |
| 2152 | 1878 // Instead of tearing down / rebuilding the free lists here, we |
| 1879 // could instead use the remove_all_pending() method on free_list to | |
| 1880 // remove only the ones that we need to remove. | |
| 4072 | 1881 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1882 shrink_helper(shrink_bytes); |
| 4072 | 1883 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1884 |
| 3766 | 1885 _hrs.verify_optional(); |
| 2152 | 1886 verify_region_sets_optional(); |
| 342 | 1887 } |
| 1888 | |
| 1889 // Public methods. | |
| 1890 | |
| 1891 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1892 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1893 #endif // _MSC_VER | |
| 1894 | |
| 1895 | |
| 1896 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1897 SharedHeap(policy_), | |
| 1898 _g1_policy(policy_), | |
| 1111 | 1899 _dirty_card_queue_set(false), |
| 1705 | 1900 _into_cset_dirty_card_queue_set(false), |
|
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1901 _is_alive_closure_cm(this), |
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1902 _is_alive_closure_stw(this), |
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1903 _ref_processor_cm(NULL), |
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1904 _ref_processor_stw(NULL), |
| 342 | 1905 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1906 _bot_shared(NULL), | |
| 10405 | 1907 _evac_failure_scan_stack(NULL), |
| 342 | 1908 _mark_in_progress(false), |
| 2152 | 1909 _cg1r(NULL), _summary_bytes_used(0), |
|
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1910 _g1mm(NULL), |
| 342 | 1911 _refine_cte_cl(NULL), |
| 1912 _full_collection(false), | |
|
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1913 _free_list("Master Free List", new MasterFreeRegionListMtSafeChecker()), |
|
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1914 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1915 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1916 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
| 2152 | 1917 _free_regions_coming(false), |
| 342 | 1918 _young_list(new YoungList(this)), |
| 1919 _gc_time_stamp(0), | |
|
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1920 _retained_old_gc_alloc_region(NULL), |
| 6595 | 1921 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1922 _old_plab_stats(OldPLABSize, PLABWeight), | |
|
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1923 _expand_heap_after_alloc_failure(true), |
| 526 | 1924 _surviving_young_words(NULL), |
|
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1925 _old_marking_cycles_started(0), |
|
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1926 _old_marking_cycles_completed(0), |
| 10405 | 1927 _concurrent_cycle_started(false), |
|
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1928 _in_cset_fast_test(), |
|
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1929 _dirty_cards_region_list(NULL), |
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1930 _worker_cset_start_region(NULL), |
| 10405 | 1931 _worker_cset_start_region_time_stamp(NULL), |
| 1932 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
| 1933 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
| 1934 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
| 1935 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
| 1936 | |
| 1937 _g1h = this; | |
| 342 | 1938 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
| 1939 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1940 } | |
|
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1941 |
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1942 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1943 |
| 342 | 1944 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1945 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1946 | |
|
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1947 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
| 342 | 1948 assert(n_rem_sets > 0, "Invariant."); |
| 1949 | |
| 6197 | 1950 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1951 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
| 10405 | 1952 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
|
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1953 |
| 342 | 1954 for (int i = 0; i < n_queues; i++) { |
| 1955 RefToScanQueue* q = new RefToScanQueue(); | |
| 1956 q->initialize(); | |
| 1957 _task_queues->register_queue(i, q); | |
| 10405 | 1958 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
| 1959 } | |
|
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1960 clear_cset_start_regions(); |
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1961 |
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1962 // Initialize the G1EvacuationFailureALot counters and flags. |
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1963 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1964 |
| 342 | 1965 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1966 } | |
| 1967 | |
| 1968 jint G1CollectedHeap::initialize() { | |
| 1166 | 1969 CollectedHeap::pre_initialize(); |
| 342 | 1970 os::enable_vtime(); |
| 1971 | |
|
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1972 G1Log::init(); |
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1973 |
| 342 | 1974 // Necessary to satisfy locking discipline assertions. |
| 1975 | |
| 1976 MutexLocker x(Heap_lock); | |
| 1977 | |
|
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1978 // We have to initialize the printer before committing the heap, as |
|
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1979 // it will be used then. |
|
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1980 _hr_printer.set_active(G1PrintHeapRegions); |
|
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1981 |
| 342 | 1982 // While there are no constraints in the GC code that HeapWordSize |
| 1983 // be any particular value, there are multiple other areas in the | |
| 1984 // system which believe this to be true (e.g. oop->object_size in some | |
| 1985 // cases incorrectly returns the size in wordSize units rather than | |
| 1986 // HeapWordSize). | |
| 1987 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 1988 | |
| 1989 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 1990 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
|
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1991 size_t heap_alignment = collector_policy()->heap_alignment(); |
| 342 | 1992 |
| 1993 // Ensure that the sizes are properly aligned. | |
| 1994 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1995 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
|
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1996 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
| 342 | 1997 |
|
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1998 _refine_cte_cl = new RefineCardTableEntryClosure(); |
|
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1999 |
|
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2000 _cg1r = new ConcurrentG1Refine(this, _refine_cte_cl); |
| 342 | 2001 |
| 2002 // Reserve the maximum. | |
|
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2003 |
|
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2004 // When compressed oops are enabled, the preferred heap base |
|
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2005 // is calculated by subtracting the requested size from the |
|
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2006 // 32Gb boundary and using the result as the base address for |
|
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2007 // heap reservation. If the requested size is not aligned to |
|
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2008 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
|
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2009 // into the ReservedHeapSpace constructor) then the actual |
|
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2010 // base of the reserved heap may end up differing from the |
|
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2011 // address that was requested (i.e. the preferred heap base). |
|
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2012 // If this happens then we could end up using a non-optimal |
|
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2013 // compressed oops mode. |
|
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2014 |
|
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2015 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
|
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|
2016 heap_alignment); |
| 342 | 2017 |
| 2018 // It is important to do this in a way such that concurrent readers can't | |
| 10405 | 2019 // temporarily think something is in the heap. (I've actually seen this |
| 342 | 2020 // happen in asserts: DLD.) |
| 2021 _reserved.set_word_size(0); | |
| 2022 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 2023 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 2024 | |
|
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|
2025 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
| 342 | 2026 |
| 2027 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 2028 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 2029 set_barrier_set(rem_set()->bs()); | |
| 12343 | 2030 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
| 2031 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
| 342 | 2032 return JNI_ENOMEM; |
| 2033 } | |
| 2034 | |
| 2035 // Also create a G1 rem set. | |
| 12343 | 2036 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
| 342 | 2037 |
| 2038 // Carve out the G1 part of the heap. | |
| 2039 | |
| 2040 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
| 2041 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
| 2042 g1_rs.size()/HeapWordSize); | |
| 2043 | |
| 2044 _g1_storage.initialize(g1_rs, 0); | |
| 2045 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
| 3766 | 2046 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
|
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2047 (HeapWord*) _g1_reserved.end()); |
|
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2048 assert(_hrs.max_length() == _expansion_regions, |
|
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2049 err_msg("max length: %u expansion regions: %u", |
|
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2050 _hrs.max_length(), _expansion_regions)); |
| 342 | 2051 |
|
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|
2052 // Do later initialization work for concurrent refinement. |
|
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|
2053 _cg1r->init(); |
|
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2054 |
|
807
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|
2055 // 6843694 - ensure that the maximum region index can fit |
|
d44bdab1c03d
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2056 // in the remembered set structures. |
|
6010
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|
2057 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
|
807
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|
2058 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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|
2059 |
|
d44bdab1c03d
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|
2060 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
|
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|
2061 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
|
3986
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7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
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|
2062 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
942
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|
2063 "too many cards per region"); |
|
807
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|
2064 |
|
17736
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|
2065 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
| 2152 | 2066 |
| 342 | 2067 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
| 2068 heap_word_size(init_byte_size)); | |
| 2069 | |
| 2070 _g1h = this; | |
| 2071 | |
|
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|
2072 _in_cset_fast_test.initialize(_g1_reserved.start(), _g1_reserved.end(), HeapRegion::GrainBytes); |
|
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2073 |
| 342 | 2074 // Create the ConcurrentMark data structure and thread. |
| 2075 // (Must do this late, so that "max_regions" is defined.) | |
|
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|
2076 _cm = new ConcurrentMark(this, heap_rs); |
|
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2077 if (_cm == NULL || !_cm->completed_initialization()) { |
|
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|
2078 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
|
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2079 return JNI_ENOMEM; |
|
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|
2080 } |
| 342 | 2081 _cmThread = _cm->cmThread(); |
| 2082 | |
| 2083 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2084 HeapRegionRemSet::init_heap(max_regions()); | |
| 2085 | |
| 677 | 2086 // Now expand into the initial heap size. |
|
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6923430: G1: assert(res != 0,"This should have worked.")
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2087 if (!expand(init_byte_size)) { |
|
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2088 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
|
2188
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2089 return JNI_ENOMEM; |
|
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|
2090 } |
| 342 | 2091 |
| 2092 // Perform any initialization actions delegated to the policy. | |
| 2093 g1_policy()->init(); | |
| 2094 | |
| 2095 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2096 SATB_Q_FL_lock, | |
| 1111 | 2097 G1SATBProcessCompletedThreshold, |
| 342 | 2098 Shared_SATB_Q_lock); |
| 794 | 2099 |
|
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2100 JavaThread::dirty_card_queue_set().initialize(_refine_cte_cl, |
|
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|
2101 DirtyCardQ_CBL_mon, |
| 794 | 2102 DirtyCardQ_FL_lock, |
| 1111 | 2103 concurrent_g1_refine()->yellow_zone(), |
| 2104 concurrent_g1_refine()->red_zone(), | |
| 794 | 2105 Shared_DirtyCardQ_lock); |
| 2106 | |
|
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|
2107 if (G1DeferredRSUpdate) { |
|
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|
2108 dirty_card_queue_set().initialize(NULL, // Should never be called by the Java code |
|
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|
2109 DirtyCardQ_CBL_mon, |
|
616
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|
2110 DirtyCardQ_FL_lock, |
| 1111 | 2111 -1, // never trigger processing |
| 2112 -1, // no limit on length | |
|
616
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|
2113 Shared_DirtyCardQ_lock, |
|
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|
2114 &JavaThread::dirty_card_queue_set()); |
|
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|
2115 } |
| 1705 | 2116 |
| 2117 // Initialize the card queue set used to hold cards containing | |
| 2118 // references into the collection set. | |
|
20216
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|
2119 _into_cset_dirty_card_queue_set.initialize(NULL, // Should never be called by the Java code |
|
570cb6369f17
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|
2120 DirtyCardQ_CBL_mon, |
| 1705 | 2121 DirtyCardQ_FL_lock, |
| 2122 -1, // never trigger processing | |
| 2123 -1, // no limit on length | |
| 2124 Shared_DirtyCardQ_lock, | |
| 2125 &JavaThread::dirty_card_queue_set()); | |
| 2126 | |
| 342 | 2127 // In case we're keeping closure specialization stats, initialize those |
| 2128 // counts and that mechanism. | |
| 2129 SpecializationStats::clear(); | |
| 2130 | |
|
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|
2131 // Here we allocate the dummy full region that is required by the |
|
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|
2132 // G1AllocRegion class. If we don't pass an address in the reserved |
|
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|
2133 // space here, lots of asserts fire. |
| 3766 | 2134 |
| 2135 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
| 2136 _g1_reserved.start()); | |
|
2433
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|
2137 // We'll re-use the same region whether the alloc region will |
|
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|
2138 // require BOT updates or not and, if it doesn't, then a non-young |
|
abdfc822206f
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|
2139 // region will complain that it cannot support allocations without |
|
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|
2140 // BOT updates. So we'll tag the dummy region as young to avoid that. |
|
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|
2141 dummy_region->set_young(); |
|
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|
2142 // Make sure it's full. |
|
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|
2143 dummy_region->set_top(dummy_region->end()); |
|
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|
2144 G1AllocRegion::setup(this, dummy_region); |
|
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|
2145 |
|
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|
2146 init_mutator_alloc_region(); |
|
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|
2147 |
|
3289
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|
2148 // Do create of the monitoring and management support so that |
|
b52782ae3880
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|
2149 // values in the heap have been properly initialized. |
|
3980
8229bd737950
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|
2150 _g1mm = new G1MonitoringSupport(this); |
|
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|
2151 |
| 17764 | 2152 G1StringDedup::initialize(); |
| 2153 | |
| 342 | 2154 return JNI_OK; |
| 2155 } | |
| 2156 | |
|
17947
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|
2157 void G1CollectedHeap::stop() { |
| 17992 | 2158 // Stop all concurrent threads. We do this to make sure these threads |
| 2159 // do not continue to execute and access resources (e.g. gclog_or_tty) | |
|
17947
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|
2160 // that are destroyed during shutdown. |
| 17992 | 2161 _cg1r->stop(); |
| 2162 _cmThread->stop(); | |
| 2163 if (G1StringDedup::is_enabled()) { | |
| 2164 G1StringDedup::stop(); | |
| 2165 } | |
|
17947
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|
2166 } |
|
1772223a25a2
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|
2167 |
|
12233
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|
2168 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
|
40136aa2cdb1
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|
2169 return HeapRegion::max_region_size(); |
|
40136aa2cdb1
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|
2170 } |
|
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|
2171 |
| 342 | 2172 void G1CollectedHeap::ref_processing_init() { |
|
1974
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|
2173 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
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|
2174 // |
|
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|
2175 // * There are two reference processor instances. One is |
|
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|
2176 // used to record and process discovered references |
|
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|
2177 // during concurrent marking; the other is used to |
|
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|
2178 // record and process references during STW pauses |
|
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|
2179 // (both full and incremental). |
|
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|
2180 // * Both ref processors need to 'span' the entire heap as |
|
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|
2181 // the regions in the collection set may be dotted around. |
|
4dfb2df418f2
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|
2182 // |
|
4dfb2df418f2
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|
2183 // * For the concurrent marking ref processor: |
|
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|
2184 // * Reference discovery is enabled at initial marking. |
|
4dfb2df418f2
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|
2185 // * Reference discovery is disabled and the discovered |
|
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|
2186 // references processed etc during remarking. |
|
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|
2187 // * Reference discovery is MT (see below). |
|
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|
2188 // * Reference discovery requires a barrier (see below). |
|
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|
2189 // * Reference processing may or may not be MT |
|
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|
2190 // (depending on the value of ParallelRefProcEnabled |
|
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|
2191 // and ParallelGCThreads). |
|
4dfb2df418f2
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|
2192 // * A full GC disables reference discovery by the CM |
|
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|
2193 // ref processor and abandons any entries on it's |
|
4dfb2df418f2
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|
2194 // discovered lists. |
|
4dfb2df418f2
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|
2195 // |
|
4dfb2df418f2
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|
2196 // * For the STW processor: |
|
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|
2197 // * Non MT discovery is enabled at the start of a full GC. |
|
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|
2198 // * Processing and enqueueing during a full GC is non-MT. |
|
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|
2199 // * During a full GC, references are processed after marking. |
|
4dfb2df418f2
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|
2200 // |
|
4dfb2df418f2
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|
2201 // * Discovery (may or may not be MT) is enabled at the start |
|
4dfb2df418f2
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|
2202 // of an incremental evacuation pause. |
|
4dfb2df418f2
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|
2203 // * References are processed near the end of a STW evacuation pause. |
|
4dfb2df418f2
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changeset
|
2204 // * For both types of GC: |
|
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changeset
|
2205 // * Discovery is atomic - i.e. not concurrent. |
|
4dfb2df418f2
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changeset
|
2206 // * Reference discovery will not need a barrier. |
|
1974
fd1d227ef1b9
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diff
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|
2207 |
| 342 | 2208 SharedHeap::ref_processing_init(); |
| 2209 MemRegion mr = reserved_region(); | |
|
3979
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|
2210 |
|
4dfb2df418f2
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changeset
|
2211 // Concurrent Mark ref processor |
|
4dfb2df418f2
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diff
changeset
|
2212 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2213 new ReferenceProcessor(mr, // span |
|
3979
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|
2214 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
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parents:
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diff
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|
2215 // mt processing |
|
4dfb2df418f2
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diff
changeset
|
2216 (int) ParallelGCThreads, |
|
4dfb2df418f2
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diff
changeset
|
2217 // degree of mt processing |
|
4dfb2df418f2
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diff
changeset
|
2218 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
2219 // mt discovery |
|
4dfb2df418f2
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diff
changeset
|
2220 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
2221 // degree of mt discovery |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
2222 false, |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
2223 // Reference discovery is not atomic |
|
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
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17948
diff
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|
2224 &_is_alive_closure_cm); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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diff
changeset
|
2225 // is alive closure |
|
4dfb2df418f2
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johnc
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3973
diff
changeset
|
2226 // (for efficiency/performance) |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
2227 |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
2228 // STW ref processor |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
2229 _ref_processor_stw = |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2230 new ReferenceProcessor(mr, // span |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2231 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
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diff
changeset
|
2232 // mt processing |
|
4dfb2df418f2
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diff
changeset
|
2233 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2234 // degree of mt processing |
|
4dfb2df418f2
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johnc
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3973
diff
changeset
|
2235 (ParallelGCThreads > 1), |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
2236 // mt discovery |
|
4dfb2df418f2
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3973
diff
changeset
|
2237 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
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johnc
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3973
diff
changeset
|
2238 // degree of mt discovery |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2239 true, |
|
4dfb2df418f2
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|
2240 // Reference discovery is atomic |
|
17976
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|
2241 &_is_alive_closure_stw); |
|
3979
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|
2242 // is alive closure |
|
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|
2243 // (for efficiency/performance) |
| 342 | 2244 } |
| 2245 | |
| 2246 size_t G1CollectedHeap::capacity() const { | |
| 2247 return _g1_committed.byte_size(); | |
| 2248 } | |
| 2249 | |
|
6254
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|
2250 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
|
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|
2251 assert(!hr->continuesHumongous(), "pre-condition"); |
|
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|
2252 hr->reset_gc_time_stamp(); |
|
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|
2253 if (hr->startsHumongous()) { |
|
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|
2254 uint first_index = hr->hrs_index() + 1; |
|
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|
2255 uint last_index = hr->last_hc_index(); |
|
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|
2256 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2257 HeapRegion* chr = region_at(i); |
|
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|
2258 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2259 chr->reset_gc_time_stamp(); |
|
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|
2260 } |
|
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|
2261 } |
|
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|
2262 } |
|
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|
2263 |
|
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|
2264 #ifndef PRODUCT |
|
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|
2265 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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|
2266 private: |
|
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|
2267 unsigned _gc_time_stamp; |
|
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|
2268 bool _failures; |
|
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|
2269 |
|
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|
2270 public: |
|
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|
2271 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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|
2272 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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|
2273 |
|
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|
2274 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2275 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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|
2276 if (_gc_time_stamp != region_gc_time_stamp) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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6220
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|
2277 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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6220
diff
changeset
|
2278 "expected %d", HR_FORMAT_PARAMS(hr), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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6220
diff
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|
2279 region_gc_time_stamp, _gc_time_stamp); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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6220
diff
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|
2280 _failures = true; |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2281 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2282 return false; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2283 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
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6220
diff
changeset
|
2284 |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2285 bool failures() { return _failures; } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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6220
diff
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|
2286 }; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
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6220
diff
changeset
|
2287 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2288 void G1CollectedHeap::check_gc_time_stamps() { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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6220
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|
2289 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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6220
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|
2290 heap_region_iterate(&cl); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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6220
diff
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|
2291 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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6220
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|
2292 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2293 #endif // PRODUCT |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2294 |
| 1705 | 2295 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2296 DirtyCardQueue* into_cset_dcq, | |
| 2297 bool concurrent, | |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2298 uint worker_i) { |
| 889 | 2299 // 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
|
2300 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
|
2301 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2302 |
| 342 | 2303 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2304 int n_completed_buffers = 0; | |
| 1705 | 2305 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2306 n_completed_buffers++; |
| 2307 } | |
|
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
|
2308 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
| 342 | 2309 dcqs.clear_n_completed_buffers(); |
| 2310 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2311 } | |
| 2312 | |
| 2313 | |
| 2314 // Computes the sum of the storage used by the various regions. | |
| 2315 | |
| 2316 size_t G1CollectedHeap::used() const { | |
|
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2317 assert(Heap_lock->owner() != NULL, |
|
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2318 "Should be owned on this thread's behalf."); |
| 342 | 2319 size_t result = _summary_bytes_used; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2320 // 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
|
2321 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2322 if (hr != NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2323 result += hr->used(); |
| 342 | 2324 return result; |
| 2325 } | |
| 2326 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2327 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
|
2328 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
|
2329 return result; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2330 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2331 |
| 342 | 2332 class SumUsedClosure: public HeapRegionClosure { |
| 2333 size_t _used; | |
| 2334 public: | |
| 2335 SumUsedClosure() : _used(0) {} | |
| 2336 bool doHeapRegion(HeapRegion* r) { | |
| 2337 if (!r->continuesHumongous()) { | |
| 2338 _used += r->used(); | |
| 2339 } | |
| 2340 return false; | |
| 2341 } | |
| 2342 size_t result() { return _used; } | |
| 2343 }; | |
| 2344 | |
| 2345 size_t G1CollectedHeap::recalculate_used() const { | |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2346 double recalculate_used_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2347 |
| 342 | 2348 SumUsedClosure blk; |
| 3766 | 2349 heap_region_iterate(&blk); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2350 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2351 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
| 342 | 2352 return blk.result(); |
| 2353 } | |
| 2354 | |
| 2355 size_t G1CollectedHeap::unsafe_max_alloc() { | |
| 2152 | 2356 if (free_regions() > 0) return HeapRegion::GrainBytes; |
| 342 | 2357 // otherwise, is there space in the current allocation region? |
| 2358 | |
| 2359 // We need to store the current allocation region in a local variable | |
| 2360 // here. The problem is that this method doesn't take any locks and | |
| 2361 // there may be other threads which overwrite the current allocation | |
| 2362 // region field. attempt_allocation(), for example, sets it to NULL | |
| 2363 // and this can happen *after* the NULL check here but before the call | |
| 2364 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
| 2365 // to be a problem in the optimized build, since the two loads of the | |
| 2366 // current allocation region field are optimized away. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2367 HeapRegion* hr = _mutator_alloc_region.get(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2368 if (hr == NULL) { |
| 342 | 2369 return 0; |
| 2370 } | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2371 return hr->free(); |
| 342 | 2372 } |
| 2373 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2374 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
|
2375 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2376 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
|
2377 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
|
2378 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
|
2379 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2380 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2381 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2382 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2383 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2384 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2385 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2386 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2387 // 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
|
2388 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2389 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2390 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2391 // 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
|
2392 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2393 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2394 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2395 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2396 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2397 // 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
|
2398 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2399 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2400 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2401 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2402 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2403 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2404 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2405 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
|
2406 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
|
2407 _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
|
2408 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
|
2409 _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
|
2410 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2411 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2412 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2413 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2414 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
|
2415 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2416 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2417 // 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
|
2418 // 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
|
2419 // 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
|
2420 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2421 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2422 // 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
|
2423 // 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
|
2424 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2425 // 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
|
2426 // nesting) or two (when a Full GC interrupted a concurrent cycle) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2427 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2428 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2429 // 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
parents:
1995
diff
changeset
|
2430 assert(concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2431 (_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
|
2432 (_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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6109
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changeset
|
2433 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:
6109
diff
changeset
|
2434 "is inconsistent with _old_marking_cycles_completed = %u", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2435 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
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diff
changeset
|
2436 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2437 // 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
|
2438 assert(!concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2439 (_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
|
2440 err_msg("for outer caller (concurrent cycle): " |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2441 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2442 "is inconsistent with _old_marking_cycles_completed = %u", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2443 _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
|
2444 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2445 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2446 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2447 // 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
|
2448 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2449 // is set) so that if a waiter requests another System.gc() it doesn't |
| 10405 | 2450 // 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
|
2451 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2452 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2453 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2454 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2455 // This notify_all() will ensure that a thread that called |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2456 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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parents:
1611
diff
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|
2457 // 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
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parents:
1611
diff
changeset
|
2458 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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parents:
1611
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changeset
|
2459 FullGCCount_lock->notify_all(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2460 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
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diff
changeset
|
2461 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2462 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
| 10405 | 2463 _concurrent_cycle_started = true; |
| 2464 _gc_timer_cm->register_gc_start(start_time); | |
| 2465 | |
| 2466 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
| 2467 trace_heap_before_gc(_gc_tracer_cm); | |
| 2468 } | |
| 2469 | |
| 2470 void G1CollectedHeap::register_concurrent_cycle_end() { | |
| 2471 if (_concurrent_cycle_started) { | |
| 2472 if (_cm->has_aborted()) { | |
| 2473 _gc_tracer_cm->report_concurrent_mode_failure(); | |
| 2474 } | |
|
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2475 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2476 _gc_timer_cm->register_gc_end(); |
| 10405 | 2477 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
| 2478 | |
| 2479 _concurrent_cycle_started = false; | |
| 2480 } | |
| 2481 } | |
| 2482 | |
| 2483 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
| 2484 if (_concurrent_cycle_started) { | |
| 2485 trace_heap_after_gc(_gc_tracer_cm); | |
| 2486 } | |
| 2487 } | |
| 2488 | |
| 2489 G1YCType G1CollectedHeap::yc_type() { | |
| 2490 bool is_young = g1_policy()->gcs_are_young(); | |
| 2491 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
| 2492 bool is_during_mark = mark_in_progress(); | |
| 2493 | |
| 2494 if (is_initial_mark) { | |
| 2495 return InitialMark; | |
| 2496 } else if (is_during_mark) { | |
| 2497 return DuringMark; | |
| 2498 } else if (is_young) { | |
| 2499 return Normal; | |
| 2500 } else { | |
| 2501 return Mixed; | |
| 2502 } | |
| 2503 } | |
| 2504 | |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2505 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
|
2506 assert_heap_not_locked(); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2507 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2508 unsigned int gc_count_before; |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2509 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
|
2510 bool retry_gc; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2511 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2512 do { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2513 retry_gc = false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2514 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2515 { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2516 MutexLocker ml(Heap_lock); |
|
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 // 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
|
2519 gc_count_before = total_collections(); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2520 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
|
2521 } |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2522 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2523 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
|
2524 // 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
|
2525 // 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
|
2526 // we are not requesting a post-GC allocation. |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2527 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2528 0, /* word_size */ |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2529 true, /* should_initiate_conc_mark */ |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2530 g1_policy()->max_pause_time_ms(), |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2531 cause); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2532 |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2533 VMThread::execute(&op); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2534 if (!op.pause_succeeded()) { |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2535 if (old_marking_count_before == _old_marking_cycles_started) { |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2536 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
|
2537 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2538 // 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
|
2539 // 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
|
2540 // 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
|
2541 } |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2542 |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2543 if (retry_gc) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2544 if (GC_locker::is_active_and_needs_gc()) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2545 GC_locker::stall_until_clear(); |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2546 } |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2547 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2548 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2549 } else { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2550 if (cause == GCCause::_gc_locker |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2551 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
|
2552 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2553 // 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
|
2554 // 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
|
2555 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
|
2556 0, /* word_size */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2557 false, /* should_initiate_conc_mark */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2558 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
|
2559 cause); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2560 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2561 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2562 // Schedule a Full GC. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2563 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
|
2564 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2565 } |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2566 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2567 } while (retry_gc); |
| 342 | 2568 } |
| 2569 | |
| 2570 bool G1CollectedHeap::is_in(const void* p) const { | |
| 4708 | 2571 if (_g1_committed.contains(p)) { |
| 2572 // Given that we know that p is in the committed space, | |
| 2573 // heap_region_containing_raw() should successfully | |
| 2574 // return the containing region. | |
| 2575 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2576 return hr->is_in(p); |
| 2577 } else { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2578 return false; |
| 342 | 2579 } |
| 2580 } | |
| 2581 | |
| 2582 // Iteration functions. | |
| 2583 | |
| 2584 // Iterates an OopClosure over all ref-containing fields of objects | |
| 2585 // within a HeapRegion. | |
| 2586 | |
| 2587 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
| 2588 MemRegion _mr; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
2589 ExtendedOopClosure* _cl; |
| 342 | 2590 public: |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2591 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
| 342 | 2592 : _mr(mr), _cl(cl) {} |
| 2593 bool doHeapRegion(HeapRegion* r) { | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2594 if (!r->continuesHumongous()) { |
| 342 | 2595 r->oop_iterate(_cl); |
| 2596 } | |
| 2597 return false; | |
| 2598 } | |
| 2599 }; | |
| 2600 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2601 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
| 342 | 2602 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
| 3766 | 2603 heap_region_iterate(&blk); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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2604 } |
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2605 |
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2606 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
| 342 | 2607 IterateOopClosureRegionClosure blk(mr, cl); |
| 3766 | 2608 heap_region_iterate(&blk); |
| 342 | 2609 } |
| 2610 | |
| 2611 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2612 | |
| 2613 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2614 ObjectClosure* _cl; | |
| 2615 public: | |
| 2616 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2617 bool doHeapRegion(HeapRegion* r) { | |
| 2618 if (! r->continuesHumongous()) { | |
| 2619 r->object_iterate(_cl); | |
| 2620 } | |
| 2621 return false; | |
| 2622 } | |
| 2623 }; | |
| 2624 | |
|
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2625 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
| 342 | 2626 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2627 heap_region_iterate(&blk); |
| 342 | 2628 } |
| 2629 | |
| 2630 // Calls a SpaceClosure on a HeapRegion. | |
| 2631 | |
| 2632 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2633 SpaceClosure* _cl; | |
| 2634 public: | |
| 2635 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2636 bool doHeapRegion(HeapRegion* r) { | |
| 2637 _cl->do_space(r); | |
| 2638 return false; | |
| 2639 } | |
| 2640 }; | |
| 2641 | |
| 2642 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2643 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2644 heap_region_iterate(&blk); |
| 342 | 2645 } |
| 2646 | |
| 3766 | 2647 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
| 2648 _hrs.iterate(cl); | |
| 342 | 2649 } |
| 2650 | |
| 2651 void | |
| 2652 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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2653 uint worker_id, |
|
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2654 uint no_of_par_workers, |
| 342 | 2655 jint claim_value) { |
|
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2656 const uint regions = n_regions(); |
|
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2657 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
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2658 no_of_par_workers : |
|
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|
2659 1); |
|
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|
2660 assert(UseDynamicNumberOfGCThreads || |
|
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2661 no_of_par_workers == workers()->total_workers(), |
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2662 "Non dynamic should use fixed number of workers"); |
| 355 | 2663 // try to spread out the starting points of the workers |
|
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2664 const HeapRegion* start_hr = |
|
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2665 start_region_for_worker(worker_id, no_of_par_workers); |
|
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2666 const uint start_index = start_hr->hrs_index(); |
| 355 | 2667 |
| 2668 // each worker will actually look at all regions | |
|
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2669 for (uint count = 0; count < regions; ++count) { |
|
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|
2670 const uint index = (start_index + count) % regions; |
| 355 | 2671 assert(0 <= index && index < regions, "sanity"); |
| 2672 HeapRegion* r = region_at(index); | |
| 2673 // we'll ignore "continues humongous" regions (we'll process them | |
| 2674 // when we come across their corresponding "start humongous" | |
| 2675 // region) and regions already claimed | |
| 2676 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
| 2677 continue; | |
| 2678 } | |
| 2679 // OK, try to claim it | |
| 342 | 2680 if (r->claimHeapRegion(claim_value)) { |
| 355 | 2681 // success! |
| 2682 assert(!r->continuesHumongous(), "sanity"); | |
| 2683 if (r->startsHumongous()) { | |
| 2684 // If the region is "starts humongous" we'll iterate over its | |
| 2685 // "continues humongous" first; in fact we'll do them | |
| 2686 // first. The order is important. In on case, calling the | |
| 2687 // closure on the "starts humongous" region might de-allocate | |
| 2688 // and clear all its "continues humongous" regions and, as a | |
| 2689 // result, we might end up processing them twice. So, we'll do | |
| 2690 // them first (notice: most closures will ignore them anyway) and | |
| 2691 // then we'll do the "starts humongous" region. | |
|
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|
2692 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
| 355 | 2693 HeapRegion* chr = region_at(ch_index); |
| 2694 | |
| 2695 // if the region has already been claimed or it's not | |
| 2696 // "continues humongous" we're done | |
| 2697 if (chr->claim_value() == claim_value || | |
| 2698 !chr->continuesHumongous()) { | |
| 2699 break; | |
| 2700 } | |
| 2701 | |
| 10405 | 2702 // No one should have claimed it directly. We can given |
| 355 | 2703 // that we claimed its "starts humongous" region. |
| 2704 assert(chr->claim_value() != claim_value, "sanity"); | |
| 2705 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2706 | |
| 2707 if (chr->claimHeapRegion(claim_value)) { | |
| 10405 | 2708 // we should always be able to claim it; no one else should |
| 355 | 2709 // be trying to claim this region |
| 2710 | |
| 2711 bool res2 = cl->doHeapRegion(chr); | |
| 2712 assert(!res2, "Should not abort"); | |
| 2713 | |
| 2714 // Right now, this holds (i.e., no closure that actually | |
| 2715 // does something with "continues humongous" regions | |
| 2716 // clears them). We might have to weaken it in the future, | |
| 2717 // but let's leave these two asserts here for extra safety. | |
| 2718 assert(chr->continuesHumongous(), "should still be the case"); | |
| 2719 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2720 } else { | |
| 2721 guarantee(false, "we should not reach here"); | |
| 2722 } | |
| 2723 } | |
| 2724 } | |
| 2725 | |
| 2726 assert(!r->continuesHumongous(), "sanity"); | |
| 2727 bool res = cl->doHeapRegion(r); | |
| 2728 assert(!res, "Should not abort"); | |
| 2729 } | |
| 2730 } | |
| 2731 } | |
| 2732 | |
| 390 | 2733 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2734 public: | |
| 2735 bool doHeapRegion(HeapRegion* r) { | |
| 2736 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2737 return false; | |
| 2738 } | |
| 2739 }; | |
| 2740 | |
|
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|
2741 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2742 ResetClaimValuesClosure blk; |
| 2743 heap_region_iterate(&blk); | |
| 2744 } | |
| 2745 | |
|
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|
2746 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
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|
2747 ResetClaimValuesClosure blk; |
|
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|
2748 collection_set_iterate(&blk); |
|
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|
2749 } |
|
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|
2750 |
| 355 | 2751 #ifdef ASSERT |
| 2752 // This checks whether all regions in the heap have the correct claim | |
| 2753 // value. I also piggy-backed on this a check to ensure that the | |
| 2754 // humongous_start_region() information on "continues humongous" | |
| 2755 // regions is correct. | |
| 2756 | |
| 2757 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2758 private: | |
| 2759 jint _claim_value; | |
|
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|
2760 uint _failures; |
| 355 | 2761 HeapRegion* _sh_region; |
|
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2762 |
| 355 | 2763 public: |
| 2764 CheckClaimValuesClosure(jint claim_value) : | |
| 2765 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2766 bool doHeapRegion(HeapRegion* r) { | |
| 2767 if (r->claim_value() != _claim_value) { | |
|
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|
2768 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2769 "claim value = %d, should be %d", |
|
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|
2770 HR_FORMAT_PARAMS(r), |
|
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|
2771 r->claim_value(), _claim_value); |
| 355 | 2772 ++_failures; |
| 2773 } | |
| 2774 if (!r->isHumongous()) { | |
| 2775 _sh_region = NULL; | |
| 2776 } else if (r->startsHumongous()) { | |
| 2777 _sh_region = r; | |
| 2778 } else if (r->continuesHumongous()) { | |
| 2779 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2780 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2781 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2782 HR_FORMAT_PARAMS(r), |
| 355 | 2783 r->humongous_start_region(), |
| 2784 _sh_region); | |
| 2785 ++_failures; | |
| 342 | 2786 } |
| 2787 } | |
| 355 | 2788 return false; |
| 2789 } | |
|
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|
2790 uint failures() { return _failures; } |
| 355 | 2791 }; |
| 2792 | |
| 2793 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2794 CheckClaimValuesClosure cl(claim_value); | |
| 2795 heap_region_iterate(&cl); | |
| 2796 return cl.failures() == 0; | |
| 2797 } | |
|
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|
2798 |
|
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|
2799 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
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|
2800 private: |
|
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|
2801 jint _claim_value; |
|
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|
2802 uint _failures; |
|
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|
2803 |
|
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|
2804 public: |
|
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|
2805 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
6010
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|
2806 _claim_value(claim_value), _failures(0) { } |
|
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|
2807 |
|
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|
2808 uint failures() { return _failures; } |
|
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|
2809 |
|
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|
2810 bool doHeapRegion(HeapRegion* hr) { |
|
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|
2811 assert(hr->in_collection_set(), "how?"); |
|
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|
2812 assert(!hr->isHumongous(), "H-region in CSet"); |
|
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|
2813 if (hr->claim_value() != _claim_value) { |
|
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|
2814 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
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|
2815 "claim value = %d, should be %d", |
|
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|
2816 HR_FORMAT_PARAMS(hr), |
|
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|
2817 hr->claim_value(), _claim_value); |
|
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|
2818 _failures += 1; |
|
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|
2819 } |
|
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|
2820 return false; |
|
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|
2821 } |
|
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|
2822 }; |
|
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|
2823 |
|
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|
2824 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
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|
2825 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2826 collection_set_iterate(&cl); |
|
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|
2827 return cl.failures() == 0; |
|
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|
2828 } |
| 355 | 2829 #endif // ASSERT |
| 342 | 2830 |
|
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|
2831 // Clear the cached CSet starting regions and (more importantly) |
|
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|
2832 // the time stamps. Called when we reset the GC time stamp. |
|
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|
2833 void G1CollectedHeap::clear_cset_start_regions() { |
|
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|
2834 assert(_worker_cset_start_region != NULL, "sanity"); |
|
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|
2835 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
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|
2836 |
|
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|
2837 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
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|
2838 for (int i = 0; i < n_queues; i++) { |
|
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|
2839 _worker_cset_start_region[i] = NULL; |
|
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|
2840 _worker_cset_start_region_time_stamp[i] = 0; |
|
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|
2841 } |
|
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|
2842 } |
|
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|
2843 |
|
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|
2844 // Given the id of a worker, obtain or calculate a suitable |
|
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|
2845 // 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
|
2846 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(uint worker_i) { |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2847 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2848 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2849 HeapRegion* result = NULL; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2850 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2851 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2852 if (_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
|
2853 // Cached starting region for current worker was set |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2854 // during the current pause - so it's valid. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2855 // Note: the cached starting heap region may be NULL |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2856 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2857 result = _worker_cset_start_region[worker_i]; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2858 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
|
2859 return result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2860 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2861 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2862 // The cached entry was not valid so let's calculate |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2863 // 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
|
2864 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2865 // 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
|
2866 // 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
|
2867 // avoid contention. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2868 // If we have: |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2869 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2870 // p threads |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2871 // 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
|
2872 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2873 result = g1_policy()->collection_set(); |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2874 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2875 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
|
2876 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
|
2877 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2878 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2879 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2880 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2881 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
|
2882 uint start_ind = 0; |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2883 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2884 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2885 _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
|
2886 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2887 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2888 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
|
2889 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
|
2890 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2891 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2892 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
|
2893 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2894 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2895 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2896 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2897 // 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
|
2898 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2899 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
|
2900 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
|
2901 "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
|
2902 _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
|
2903 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2904 _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
|
2905 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2906 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2907 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2908 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2909 uint no_of_par_workers) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2910 uint worker_num = |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2911 G1CollectedHeap::use_parallel_gc_threads() ? no_of_par_workers : 1U; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2912 assert(UseDynamicNumberOfGCThreads || |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2913 no_of_par_workers == workers()->total_workers(), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2914 "Non dynamic should use fixed number of workers"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2915 const uint start_index = n_regions() * worker_i / worker_num; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2916 return region_at(start_index); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2917 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2918 |
| 342 | 2919 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2920 HeapRegion* r = g1_policy()->collection_set(); | |
| 2921 while (r != NULL) { | |
| 2922 HeapRegion* next = r->next_in_collection_set(); | |
| 2923 if (cl->doHeapRegion(r)) { | |
| 2924 cl->incomplete(); | |
| 2925 return; | |
| 2926 } | |
| 2927 r = next; | |
| 2928 } | |
| 2929 } | |
| 2930 | |
| 2931 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2932 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2933 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2934 // 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
|
2935 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2936 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2937 |
| 342 | 2938 assert(r->in_collection_set(), |
| 2939 "Start region must be a member of the collection set."); | |
| 2940 HeapRegion* cur = r; | |
| 2941 while (cur != NULL) { | |
| 2942 HeapRegion* next = cur->next_in_collection_set(); | |
| 2943 if (cl->doHeapRegion(cur) && false) { | |
| 2944 cl->incomplete(); | |
| 2945 return; | |
| 2946 } | |
| 2947 cur = next; | |
| 2948 } | |
| 2949 cur = g1_policy()->collection_set(); | |
| 2950 while (cur != r) { | |
| 2951 HeapRegion* next = cur->next_in_collection_set(); | |
| 2952 if (cl->doHeapRegion(cur) && false) { | |
| 2953 cl->incomplete(); | |
| 2954 return; | |
| 2955 } | |
| 2956 cur = next; | |
| 2957 } | |
| 2958 } | |
| 2959 | |
| 2960 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
| 3766 | 2961 return n_regions() > 0 ? region_at(0) : NULL; |
| 342 | 2962 } |
| 2963 | |
| 2964 | |
| 2965 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
| 2966 Space* res = heap_region_containing(addr); | |
| 2967 return res; | |
| 2968 } | |
| 2969 | |
| 2970 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2971 Space* sp = space_containing(addr); | |
| 2972 if (sp != NULL) { | |
| 2973 return sp->block_start(addr); | |
| 2974 } | |
| 2975 return NULL; | |
| 2976 } | |
| 2977 | |
| 2978 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 2979 Space* sp = space_containing(addr); | |
| 2980 assert(sp != NULL, "block_size of address outside of heap"); | |
| 2981 return sp->block_size(addr); | |
| 2982 } | |
| 2983 | |
| 2984 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 2985 Space* sp = space_containing(addr); | |
| 2986 return sp->block_is_obj(addr); | |
| 2987 } | |
| 2988 | |
| 2989 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 2990 return true; | |
| 2991 } | |
| 2992 | |
| 2993 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 17727 | 2994 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
| 2995 } | |
| 2996 | |
| 2997 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
| 2998 return young_list()->eden_used_bytes(); | |
| 2999 } | |
| 3000 | |
| 3001 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
| 3002 // must be smaller than the humongous object limit. | |
| 3003 size_t G1CollectedHeap::max_tlab_size() const { | |
| 3004 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
| 342 | 3005 } |
| 3006 | |
| 3007 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 3008 // Return the remaining space in the cur alloc region, but not less than | |
| 3009 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3010 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3011 // Also, this value can be at most the humongous object threshold, |
| 10405 | 3012 // 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
|
3013 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3014 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3015 HeapRegion* hr = _mutator_alloc_region.get(); |
| 17727 | 3016 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
|
3017 if (hr == NULL) { |
| 17727 | 3018 return max_tlab; |
| 342 | 3019 } else { |
| 17727 | 3020 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
| 342 | 3021 } |
| 3022 } | |
| 3023 | |
| 3024 size_t G1CollectedHeap::max_capacity() const { | |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
3025 return _g1_reserved.byte_size(); |
| 342 | 3026 } |
| 3027 | |
| 3028 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 3029 // assert(false, "NYI"); | |
| 3030 return 0; | |
| 3031 } | |
| 3032 | |
| 3033 void G1CollectedHeap::prepare_for_verify() { | |
| 3034 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 3035 ensure_parsability(false); | |
| 3036 } | |
| 3037 g1_rem_set()->prepare_for_verify(); | |
| 3038 } | |
| 3039 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3040 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3041 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3042 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3043 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3044 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3045 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3046 return hr->obj_allocated_since_next_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3047 case VerifyOption_G1UseMarkWord: |
|
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3048 return false; |
|
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|
3049 default: |
|
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|
3050 ShouldNotReachHere(); |
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|
3051 } |
|
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|
3052 return false; // keep some compilers happy |
|
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|
3053 } |
|
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|
3054 |
|
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3055 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
|
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3056 switch (vo) { |
|
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3057 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
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3058 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
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3059 case VerifyOption_G1UseMarkWord: return NULL; |
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3060 default: ShouldNotReachHere(); |
|
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|
3061 } |
|
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|
3062 return NULL; // keep some compilers happy |
|
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|
3063 } |
|
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|
3064 |
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3065 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
|
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3066 switch (vo) { |
|
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3067 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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3068 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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3069 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
|
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|
3070 default: ShouldNotReachHere(); |
|
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|
3071 } |
|
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|
3072 return false; // keep some compilers happy |
|
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|
3073 } |
|
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|
3074 |
|
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3075 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
|
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|
3076 switch (vo) { |
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3077 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
|
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3078 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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3079 case VerifyOption_G1UseMarkWord: return "NONE"; |
|
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|
3080 default: ShouldNotReachHere(); |
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|
3081 } |
|
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|
3082 return NULL; // keep some compilers happy |
|
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|
3083 } |
|
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|
3084 |
|
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|
3085 class VerifyRootsClosure: public OopClosure { |
| 12080 | 3086 private: |
| 3087 G1CollectedHeap* _g1h; | |
| 3088 VerifyOption _vo; | |
| 3089 bool _failures; | |
| 3090 public: | |
| 3091 // _vo == UsePrevMarking -> use "prev" marking information, | |
| 3092 // _vo == UseNextMarking -> use "next" marking information, | |
| 3093 // _vo == UseMarkWord -> use mark word from object header. | |
| 3094 VerifyRootsClosure(VerifyOption vo) : | |
| 3095 _g1h(G1CollectedHeap::heap()), | |
| 3096 _vo(vo), | |
| 3097 _failures(false) { } | |
| 3098 | |
| 3099 bool failures() { return _failures; } | |
| 3100 | |
| 3101 template <class T> void do_oop_nv(T* p) { | |
| 3102 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3103 if (!oopDesc::is_null(heap_oop)) { | |
| 3104 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3105 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
| 3106 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
| 3107 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
| 3108 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3109 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
| 3110 } | |
| 3111 obj->print_on(gclog_or_tty); | |
| 3112 _failures = true; | |
| 3113 } | |
| 3114 } | |
| 3115 } | |
| 3116 | |
| 3117 void do_oop(oop* p) { do_oop_nv(p); } | |
| 3118 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 3119 }; | |
| 3120 | |
|
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|
3121 class G1VerifyCodeRootOopClosure: public OopClosure { |
| 12080 | 3122 G1CollectedHeap* _g1h; |
| 3123 OopClosure* _root_cl; | |
| 3124 nmethod* _nm; | |
| 3125 VerifyOption _vo; | |
| 3126 bool _failures; | |
| 3127 | |
| 3128 template <class T> void do_oop_work(T* p) { | |
| 3129 // First verify that this root is live | |
| 3130 _root_cl->do_oop(p); | |
| 3131 | |
| 3132 if (!G1VerifyHeapRegionCodeRoots) { | |
| 3133 // We're not verifying the code roots attached to heap region. | |
| 3134 return; | |
| 3135 } | |
| 3136 | |
| 3137 // Don't check the code roots during marking verification in a full GC | |
| 3138 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3139 return; | |
| 3140 } | |
| 3141 | |
| 3142 // Now verify that the current nmethod (which contains p) is | |
| 3143 // in the code root list of the heap region containing the | |
| 3144 // object referenced by p. | |
| 3145 | |
| 3146 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3147 if (!oopDesc::is_null(heap_oop)) { | |
| 3148 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3149 | |
| 3150 // Now fetch the region containing the object | |
| 3151 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
| 3152 HeapRegionRemSet* hrrs = hr->rem_set(); | |
| 3153 // Verify that the strong code root list for this region | |
| 3154 // contains the nmethod | |
| 3155 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
| 3156 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
| 3157 "from nmethod "PTR_FORMAT" not in strong " | |
| 3158 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
| 3159 p, _nm, hr->bottom(), hr->end()); | |
| 3160 _failures = true; | |
| 3161 } | |
| 3162 } | |
| 3163 } | |
| 3164 | |
| 3165 public: | |
| 3166 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
| 3167 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
| 3168 | |
| 3169 void do_oop(oop* p) { do_oop_work(p); } | |
| 3170 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 3171 | |
| 3172 void set_nmethod(nmethod* nm) { _nm = nm; } | |
| 3173 bool failures() { return _failures; } | |
| 3174 }; | |
| 3175 | |
| 3176 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
| 3177 G1VerifyCodeRootOopClosure* _oop_cl; | |
| 3178 | |
| 3179 public: | |
| 3180 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
| 3181 _oop_cl(oop_cl) {} | |
| 3182 | |
| 3183 void do_code_blob(CodeBlob* cb) { | |
| 3184 nmethod* nm = cb->as_nmethod_or_null(); | |
| 3185 if (nm != NULL) { | |
| 3186 _oop_cl->set_nmethod(nm); | |
| 3187 nm->oops_do(_oop_cl); | |
| 3188 } | |
| 3189 } | |
| 3190 }; | |
| 3191 | |
| 3192 class YoungRefCounterClosure : public OopClosure { | |
| 3193 G1CollectedHeap* _g1h; | |
| 3194 int _count; | |
| 3195 public: | |
| 3196 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
| 3197 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
| 3198 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 3199 | |
| 3200 int count() { return _count; } | |
| 3201 void reset_count() { _count = 0; }; | |
| 3202 }; | |
| 3203 | |
| 3204 class VerifyKlassClosure: public KlassClosure { | |
| 3205 YoungRefCounterClosure _young_ref_counter_closure; | |
| 3206 OopClosure *_oop_closure; | |
| 3207 public: | |
| 3208 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
| 3209 void do_klass(Klass* k) { | |
| 3210 k->oops_do(_oop_closure); | |
| 3211 | |
| 3212 _young_ref_counter_closure.reset_count(); | |
| 3213 k->oops_do(&_young_ref_counter_closure); | |
| 3214 if (_young_ref_counter_closure.count() > 0) { | |
| 3215 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
| 3216 } | |
| 3217 } | |
| 3218 }; | |
| 3219 | |
| 342 | 3220 class VerifyLivenessOopClosure: public OopClosure { |
|
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|
3221 G1CollectedHeap* _g1h; |
|
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|
3222 VerifyOption _vo; |
| 342 | 3223 public: |
|
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|
3224 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
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|
3225 _g1h(g1h), _vo(vo) |
|
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|
3226 { } |
|
845
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diff
changeset
|
3227 void do_oop(narrowOop *p) { do_oop_work(p); } |
|
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|
3228 void do_oop( oop *p) { do_oop_work(p); } |
|
df6caf649ff7
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|
3229 |
|
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changeset
|
3230 template <class T> void do_oop_work(T *p) { |
|
df6caf649ff7
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838
diff
changeset
|
3231 oop obj = oopDesc::load_decode_heap_oop(p); |
|
3772
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changeset
|
3232 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
845
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diff
changeset
|
3233 "Dead object referenced by a not dead object"); |
| 342 | 3234 } |
| 3235 }; | |
| 3236 | |
| 3237 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3238 private: |
| 342 | 3239 G1CollectedHeap* _g1h; |
| 3240 size_t _live_bytes; | |
| 3241 HeapRegion *_hr; | |
|
3772
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changeset
|
3242 VerifyOption _vo; |
| 342 | 3243 public: |
|
3772
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diff
changeset
|
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. |
|
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changeset
|
3247 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
|
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|
3248 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3249 _g1h = G1CollectedHeap::heap(); |
| 3250 } | |
| 3251 void do_object(oop o) { | |
|
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|
3252 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3253 assert(o != NULL, "Huh?"); |
|
3772
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|
3254 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
|
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|
3255 // If the object is alive according to the mark word, |
|
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|
3256 // then verify that the marking information agrees. |
|
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changeset
|
3257 // Note we can't verify the contra-positive of the |
|
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|
3258 // above: if the object is dead (according to the mark |
|
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|
3259 // word), it may not be marked, or may have been marked |
|
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|
3260 // but has since became dead, or may have been allocated |
|
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|
3261 // since the last marking. |
|
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changeset
|
3262 if (_vo == VerifyOption_G1UseMarkWord) { |
|
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changeset
|
3263 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
|
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|
3264 } |
|
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changeset
|
3265 |
|
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3266 o->oop_iterate_no_header(&isLive); |
|
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diff
changeset
|
3267 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
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diff
changeset
|
3268 size_t obj_size = o->size(); // Make sure we don't overflow |
|
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changeset
|
3269 _live_bytes += (obj_size * HeapWordSize); |
|
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|
3270 } |
| 342 | 3271 } |
| 3272 } | |
| 3273 size_t live_bytes() { return _live_bytes; } | |
| 3274 }; | |
| 3275 | |
| 3276 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3277 HeapRegion *_hr; | |
| 3278 G1CollectedHeap *_g1; | |
| 3279 public: | |
| 3280 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3281 _g1 = G1CollectedHeap::heap(); | |
| 3282 }; | |
| 3283 | |
| 3284 void do_object(oop o) { | |
| 3285 if (o != NULL) { | |
| 3286 HeapWord *start = (HeapWord *) o; | |
| 3287 size_t word_sz = o->size(); | |
| 3288 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3289 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3290 (void*) o, word_sz, | |
| 3291 _g1->isMarkedPrev(o), | |
| 3292 _g1->isMarkedNext(o), | |
| 3293 _hr->obj_allocated_since_prev_marking(o)); | |
| 3294 HeapWord *end = start + word_sz; | |
| 3295 HeapWord *cur; | |
| 3296 int *val; | |
| 3297 for (cur = start; cur < end; cur++) { | |
| 3298 val = (int *) cur; | |
| 3299 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3300 } | |
| 3301 } | |
| 3302 } | |
| 3303 }; | |
| 3304 | |
| 3305 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3306 private: |
|
6254
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
3307 bool _par; |
|
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|
3308 VerifyOption _vo; |
|
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|
3309 bool _failures; |
| 811 | 3310 public: |
|
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|
3311 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3312 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3313 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3314 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3315 : _par(par), | |
|
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|
3316 _vo(vo), |
|
1020
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|
3317 _failures(false) {} |
|
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|
3318 |
|
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|
3319 bool failures() { |
|
ff2402f6a50b
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|
3320 return _failures; |
|
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|
3321 } |
|
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|
3322 |
| 342 | 3323 bool doHeapRegion(HeapRegion* r) { |
|
637
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|
3324 if (!r->continuesHumongous()) { |
|
1020
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|
3325 bool failures = false; |
| 6008 | 3326 r->verify(_vo, &failures); |
|
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|
3327 if (failures) { |
|
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|
3328 _failures = true; |
|
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|
3329 } else { |
|
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|
3330 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
1020
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|
3331 r->object_iterate(¬_dead_yet_cl); |
|
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|
3332 if (_vo != VerifyOption_G1UseNextMarking) { |
|
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|
3333 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
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|
3334 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
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|
3335 "max_live_bytes "SIZE_FORMAT" " |
|
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changeset
|
3336 "< calculated "SIZE_FORMAT, |
|
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|
3337 r->bottom(), r->end(), |
|
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changeset
|
3338 r->max_live_bytes(), |
|
1020
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|
3339 not_dead_yet_cl.live_bytes()); |
|
4787
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diff
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|
3340 _failures = true; |
|
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diff
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|
3341 } |
|
2ace1c4ee8da
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diff
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|
3342 } else { |
|
2ace1c4ee8da
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diff
changeset
|
3343 // When vo == UseNextMarking we cannot currently do a sanity |
|
2ace1c4ee8da
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diff
changeset
|
3344 // check on the live bytes as the calculation has not been |
|
2ace1c4ee8da
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|
3345 // finalized yet. |
|
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|
3346 } |
|
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|
3347 } |
| 342 | 3348 } |
|
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|
3349 return false; // stop the region iteration if we hit a failure |
| 342 | 3350 } |
| 3351 }; | |
| 3352 | |
| 12080 | 3353 // This is the task used for parallel verification of the heap regions |
| 390 | 3354 |
| 3355 class G1ParVerifyTask: public AbstractGangTask { | |
| 3356 private: | |
| 3357 G1CollectedHeap* _g1h; | |
|
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|
3358 VerifyOption _vo; |
|
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|
3359 bool _failures; |
| 390 | 3360 |
| 3361 public: | |
|
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|
3362 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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changeset
|
3363 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3364 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3365 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3366 AbstractGangTask("Parallel verify task"), |
|
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|
3367 _g1h(g1h), |
|
3772
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|
3368 _vo(vo), |
|
1020
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|
3369 _failures(false) { } |
|
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|
3370 |
|
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|
3371 bool failures() { |
|
ff2402f6a50b
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|
3372 return _failures; |
|
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|
3373 } |
| 390 | 3374 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
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|
3375 void work(uint worker_id) { |
|
637
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diff
changeset
|
3376 HandleMark hm; |
| 6008 | 3377 VerifyRegionClosure blk(true, _vo); |
|
4728
441e946dc1af
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jmasa
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4711
diff
changeset
|
3378 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
4095
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diff
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|
3379 _g1h->workers()->active_workers(), |
| 390 | 3380 HeapRegion::ParVerifyClaimValue); |
|
1020
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|
3381 if (blk.failures()) { |
|
ff2402f6a50b
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diff
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|
3382 _failures = true; |
|
ff2402f6a50b
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1019
diff
changeset
|
3383 } |
| 390 | 3384 } |
| 3385 }; | |
| 3386 | |
| 12080 | 3387 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
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parents:
8853
diff
changeset
|
3388 if (SafepointSynchronize::is_at_safepoint()) { |
| 12080 | 3389 assert(Thread::current()->is_VM_thread(), |
| 3390 "Expected to be executed serially by the VM thread at this point"); | |
| 3391 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3392 if (!silent) { gclog_or_tty->print("Roots "); } |
|
3772
6747fd0512e0
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johnc
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3766
diff
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|
3393 VerifyRootsClosure rootsCl(vo); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3394 VerifyKlassClosure klassCl(this, &rootsCl); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3395 CLDToKlassAndOopClosure cldCl(&klassCl, &rootsCl, false); |
|
3772
6747fd0512e0
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johnc
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diff
changeset
|
3396 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
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3289
diff
changeset
|
3397 // We apply the relevant closures to all the oops in the |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3398 // system dictionary, class loader data graph, the string table |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3399 // and the nmethods in the code cache. |
|
20257
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3400 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
|
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3401 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3402 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
3403 process_all_roots(true, // activate StrongRootsScope |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3404 SO_AllCodeCache, // roots scanning options |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3405 &rootsCl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3406 &cldCl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3407 &blobsCl); |
|
20257
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
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diff
changeset
|
3408 |
| 12080 | 3409 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
|
3772
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|
3410 |
|
6747fd0512e0
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3766
diff
changeset
|
3411 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
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3766
diff
changeset
|
3412 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
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johnc
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3766
diff
changeset
|
3413 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
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3766
diff
changeset
|
3414 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
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diff
changeset
|
3415 // the region sets when not in a full GC. |
|
6747fd0512e0
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3766
diff
changeset
|
3416 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
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johnc
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3766
diff
changeset
|
3417 verify_region_sets(); |
|
6747fd0512e0
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3766
diff
changeset
|
3418 } |
|
6747fd0512e0
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3766
diff
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|
3419 |
| 2152 | 3420 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3421 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3422 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3423 "sanity check"); | |
| 3424 | |
| 6008 | 3425 G1ParVerifyTask task(this, vo); |
|
4095
bca17e38de00
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4090
diff
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|
3426 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
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4090
diff
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|
3427 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
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|
3428 "If not dynamic should be using all the workers"); |
|
bca17e38de00
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4090
diff
changeset
|
3429 int n_workers = workers()->active_workers(); |
| 390 | 3430 set_par_threads(n_workers); |
| 3431 workers()->run_task(&task); | |
| 3432 set_par_threads(0); | |
|
1020
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|
3433 if (task.failures()) { |
|
ff2402f6a50b
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diff
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|
3434 failures = true; |
|
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1019
diff
changeset
|
3435 } |
| 390 | 3436 |
|
4095
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|
3437 // Checks that the expected amount of parallel work was done. |
|
bca17e38de00
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4090
diff
changeset
|
3438 // The implication is that n_workers is > 0. |
| 390 | 3439 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3440 "sanity check"); | |
| 3441 | |
| 3442 reset_heap_region_claim_values(); | |
| 3443 | |
| 3444 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3445 "sanity check"); | |
| 3446 } else { | |
| 6008 | 3447 VerifyRegionClosure blk(false, vo); |
| 3766 | 3448 heap_region_iterate(&blk); |
|
1020
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changeset
|
3449 if (blk.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3450 failures = true; |
|
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1019
diff
changeset
|
3451 } |
| 390 | 3452 } |
| 2152 | 3453 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3454 rem_set()->verify(); |
|
1020
ff2402f6a50b
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diff
changeset
|
3455 |
| 17764 | 3456 if (G1StringDedup::is_enabled()) { |
| 3457 if (!silent) gclog_or_tty->print("StrDedup "); | |
| 3458 G1StringDedup::verify(); | |
| 3459 } | |
| 3460 | |
|
1020
ff2402f6a50b
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diff
changeset
|
3461 if (failures) { |
|
ff2402f6a50b
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1019
diff
changeset
|
3462 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
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4072
diff
changeset
|
3463 // 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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4072
diff
changeset
|
3464 // help us track down what went wrong. This is why we call |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
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4072
diff
changeset
|
3465 // print_extended_on() instead of print_on(). |
|
53074c2c4600
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4072
diff
changeset
|
3466 print_extended_on(gclog_or_tty); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3467 gclog_or_tty->cr(); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3468 #ifndef PRODUCT |
| 1044 | 3469 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3470 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3471 vo, false /* all */); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3472 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3473 #endif |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3474 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3475 } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3476 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3477 } else { |
| 17764 | 3478 if (!silent) { |
| 3479 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
| 3480 if (G1StringDedup::is_enabled()) { | |
| 3481 gclog_or_tty->print(", StrDedup"); | |
| 3482 } | |
| 3483 gclog_or_tty->print(") "); | |
| 3484 } | |
| 342 | 3485 } |
| 3486 } | |
| 3487 | |
| 12080 | 3488 void G1CollectedHeap::verify(bool silent) { |
| 3489 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3490 } | |
| 3491 | |
| 3492 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
| 3493 double verify_time_ms = 0.0; | |
| 3494 | |
| 3495 if (guard && total_collections() >= VerifyGCStartAt) { | |
| 3496 double verify_start = os::elapsedTime(); | |
| 3497 HandleMark hm; // Discard invalid handles created during verification | |
| 3498 prepare_for_verify(); | |
| 3499 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
| 3500 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
| 3501 } | |
| 3502 | |
| 3503 return verify_time_ms; | |
| 3504 } | |
| 3505 | |
| 3506 void G1CollectedHeap::verify_before_gc() { | |
| 3507 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
| 3508 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
| 3509 } | |
| 3510 | |
| 3511 void G1CollectedHeap::verify_after_gc() { | |
| 3512 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
| 3513 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
| 3514 } | |
| 3515 | |
| 342 | 3516 class PrintRegionClosure: public HeapRegionClosure { |
| 3517 outputStream* _st; | |
| 3518 public: | |
| 3519 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3520 bool doHeapRegion(HeapRegion* r) { | |
| 3521 r->print_on(_st); | |
| 3522 return false; | |
| 3523 } | |
| 3524 }; | |
| 3525 | |
|
17833
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3526 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3527 const HeapRegion* hr, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3528 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3529 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3530 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3531 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3532 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3533 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3534 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3535 return false; // keep some compilers happy |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3536 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3537 |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3538 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3539 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3540 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3541 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3542 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3543 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3544 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3545 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3546 return false; // keep some compilers happy |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3547 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3548 |
| 342 | 3549 void G1CollectedHeap::print_on(outputStream* st) const { |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3550 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3551 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
|
3552 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3553 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3554 _g1_storage.low_boundary(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3555 _g1_storage.high(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3556 _g1_storage.high_boundary()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3557 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3558 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3559 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3560 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3561 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3562 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3563 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3564 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3565 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3566 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3567 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3568 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3569 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3570 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3571 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3572 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3573 st->cr(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3574 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:
6008
diff
changeset
|
3575 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3576 "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
|
3577 "PTAMS=previous top-at-mark-start, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3578 "NTAMS=next top-at-mark-start)"); |
| 342 | 3579 PrintRegionClosure blk(st); |
| 3766 | 3580 heap_region_iterate(&blk); |
| 342 | 3581 } |
| 3582 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3583 void G1CollectedHeap::print_on_error(outputStream* st) const { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3584 this->CollectedHeap::print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3585 |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3586 if (_cm != NULL) { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3587 st->cr(); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3588 _cm->print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3589 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3590 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3591 |
| 342 | 3592 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3593 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3594 workers()->print_worker_threads_on(st); |
| 3595 } | |
| 3596 _cmThread->print_on(st); | |
| 342 | 3597 st->cr(); |
| 1019 | 3598 _cm->print_worker_threads_on(st); |
| 3599 _cg1r->print_worker_threads_on(st); | |
| 17764 | 3600 if (G1StringDedup::is_enabled()) { |
| 3601 G1StringDedup::print_worker_threads_on(st); | |
| 3602 } | |
| 342 | 3603 } |
| 3604 | |
| 3605 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3606 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3607 workers()->threads_do(tc); |
| 3608 } | |
| 3609 tc->do_thread(_cmThread); | |
| 794 | 3610 _cg1r->threads_do(tc); |
| 17764 | 3611 if (G1StringDedup::is_enabled()) { |
| 3612 G1StringDedup::threads_do(tc); | |
| 3613 } | |
| 342 | 3614 } |
| 3615 | |
| 3616 void G1CollectedHeap::print_tracing_info() const { | |
| 3617 // We'll overload this to mean "trace GC pause statistics." | |
| 3618 if (TraceGen0Time || TraceGen1Time) { | |
| 3619 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3620 // to that. | |
| 3621 g1_policy()->print_tracing_info(); | |
| 3622 } | |
| 751 | 3623 if (G1SummarizeRSetStats) { |
| 342 | 3624 g1_rem_set()->print_summary_info(); |
| 3625 } | |
| 1282 | 3626 if (G1SummarizeConcMark) { |
| 342 | 3627 concurrent_mark()->print_summary_info(); |
| 3628 } | |
| 3629 g1_policy()->print_yg_surv_rate_info(); | |
| 3630 SpecializationStats::print(); | |
| 3631 } | |
| 3632 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3633 #ifndef PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3634 // Helpful for debugging RSet issues. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3635 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3636 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3637 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3638 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3639 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3640 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3641 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3642 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3643 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3644 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3645 _occupied_sum += occupied; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3646 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3647 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
|
3648 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3649 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3650 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3651 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3652 hrrs->print(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3653 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3654 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3655 return false; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3656 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3657 |
|
e8b0b0392037
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parents:
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diff
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|
3658 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
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tonyp
parents:
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diff
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|
3659 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3660 gclog_or_tty->print_cr("========================================"); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3661 gclog_or_tty->print_cr("%s", msg); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3662 gclog_or_tty->cr(); |
|
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3663 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3664 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3665 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3666 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3667 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3668 gclog_or_tty->cr(); |
|
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3669 } |
|
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parents:
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diff
changeset
|
3670 }; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3671 |
|
e8b0b0392037
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diff
changeset
|
3672 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
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parents:
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diff
changeset
|
3673 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3674 collection_set_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3675 } |
|
e8b0b0392037
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tonyp
parents:
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diff
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|
3676 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3677 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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changeset
|
3678 PrintRSetsClosure cl("Printing All RSets");; |
|
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3679 heap_region_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3680 } |
|
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changeset
|
3681 #endif // PRODUCT |
|
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|
3682 |
| 342 | 3683 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3684 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3685 "not a garbage-first heap"); | |
| 3686 return _g1h; | |
| 3687 } | |
| 3688 | |
| 3689 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
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6904516: More object array barrier fixes, following up on 6906727
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diff
changeset
|
3690 // always_do_update_barrier = false; |
| 342 | 3691 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3692 // Fill TLAB's and such | |
| 17727 | 3693 accumulate_statistics_all_tlabs(); |
| 342 | 3694 ensure_parsability(true); |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
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12305
diff
changeset
|
3695 |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
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12305
diff
changeset
|
3696 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
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diff
changeset
|
3697 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
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diff
changeset
|
3698 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
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diff
changeset
|
3699 } |
| 342 | 3700 } |
| 3701 | |
| 3702 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
|
10372
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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
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10327
diff
changeset
|
3703 |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
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diff
changeset
|
3704 if (G1SummarizeRSetStats && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
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10327
diff
changeset
|
3705 (G1SummarizeRSetStatsPeriod > 0) && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
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diff
changeset
|
3706 // we are at the end of the GC. Total collections has already been increased. |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
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10327
diff
changeset
|
3707 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
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diff
changeset
|
3708 g1_rem_set()->print_periodic_summary_info("After GC RS summary"); |
|
10372
e72f7eecc96d
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diff
changeset
|
3709 } |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
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diff
changeset
|
3710 |
| 342 | 3711 // FIXME: what is this about? |
| 3712 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3713 // is set. | |
| 3714 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3715 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
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parents:
1166
diff
changeset
|
3716 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3717 |
| 17727 | 3718 resize_all_tlabs(); |
| 3719 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3720 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3721 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
3722 Universe::update_heap_info_at_gc(); |
| 342 | 3723 } |
| 3724 | |
| 1973 | 3725 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3726 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
|
3727 bool* succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
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12082
diff
changeset
|
3728 GCCause::Cause gc_cause) { |
| 1973 | 3729 assert_heap_not_locked_and_not_at_safepoint(); |
| 342 | 3730 g1_policy()->record_stop_world_start(); |
| 1973 | 3731 VM_G1IncCollectionPause op(gc_count_before, |
| 3732 word_size, | |
| 3733 false, /* should_initiate_conc_mark */ | |
| 3734 g1_policy()->max_pause_time_ms(), | |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
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12082
diff
changeset
|
3735 gc_cause); |
| 1973 | 3736 VMThread::execute(&op); |
| 3737 | |
| 3738 HeapWord* result = op.result(); | |
| 3739 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3740 assert(result == NULL || ret_succeeded, | |
| 3741 "the result should be NULL if the VM did not succeed"); | |
| 3742 *succeeded = ret_succeeded; | |
| 3743 | |
| 3744 assert_heap_not_locked(); | |
| 3745 return result; | |
| 342 | 3746 } |
| 3747 | |
| 3748 void | |
| 3749 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3750 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
|
3751 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3752 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3753 CGC_lock->notify(); |
| 342 | 3754 } |
| 3755 } | |
| 3756 | |
| 3757 size_t G1CollectedHeap::pending_card_num() { | |
| 3758 size_t extra_cards = 0; | |
| 3759 JavaThread *curr = Threads::first(); | |
| 3760 while (curr != NULL) { | |
| 3761 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3762 extra_cards += dcq.size(); | |
| 3763 curr = curr->next(); | |
| 3764 } | |
| 3765 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3766 size_t buffer_size = dcqs.buffer_size(); | |
| 3767 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3768 |
| 3769 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3770 // in bytes - not the number of 'entries'. We need to convert | |
| 3771 // into a number of cards. | |
| 3772 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3773 } |
| 3774 | |
| 3775 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3776 return g1_rem_set()->cardsScanned(); |
| 342 | 3777 } |
| 3778 | |
| 3779 void | |
| 3780 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3781 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3782 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3783 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3784 if (_surviving_young_words == NULL) { |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3785 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
| 342 | 3786 "Not enough space for young surv words summary."); |
| 3787 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3788 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
|
3789 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3790 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
|
3791 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3792 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3793 #endif // !ASSERT |
| 342 | 3794 } |
| 3795 | |
| 3796 void | |
| 3797 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3798 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
|
3799 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
|
3800 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3801 _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
|
3802 } |
| 342 | 3803 } |
| 3804 | |
| 3805 void | |
| 3806 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3807 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3808 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3809 _surviving_young_words = NULL; |
| 3810 } | |
| 3811 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3812 #ifdef ASSERT |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3813 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3814 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3815 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3816 // 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
|
3817 // 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
|
3818 // 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
|
3819 // 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
|
3820 // 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
|
3821 // 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
|
3822 // 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
|
3823 // 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
|
3824 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3825 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
|
3826 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3827 // 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
|
3828 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3829 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3830 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3831 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3832 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3833 |
| 1709 | 3834 #if TASKQUEUE_STATS |
| 3835 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3836 st->print_raw_cr("GC Task Stats"); | |
| 3837 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3838 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3839 } | |
| 3840 | |
| 3841 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3842 print_taskqueue_stats_hdr(st); | |
| 3843 | |
| 3844 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3845 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3846 for (int i = 0; i < n; ++i) { |
| 3847 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3848 totals += task_queue(i)->stats; | |
| 3849 } | |
| 3850 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3851 | |
| 3852 DEBUG_ONLY(totals.verify()); | |
| 3853 } | |
| 3854 | |
| 3855 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3856 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3857 for (int i = 0; i < n; ++i) { |
| 3858 task_queue(i)->stats.reset(); | |
| 3859 } | |
| 3860 } | |
| 3861 #endif // TASKQUEUE_STATS | |
| 3862 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3863 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3864 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3865 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3866 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3867 |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3868 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
|
3869 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3870 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
|
3871 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3872 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3873 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3874 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3875 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3876 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3877 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3878 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3879 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3880 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3881 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3882 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3883 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3884 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3885 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3886 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
|
3887 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3888 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3889 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3890 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3891 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3892 gclog_or_tty->print("--"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3893 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3894 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3895 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
|
3896 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3897 gclog_or_tty->flush(); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3898 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3899 |
| 1973 | 3900 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3901 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3902 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3903 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3904 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3905 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3906 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3907 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3908 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3909 _gc_timer_stw->register_gc_start(); |
| 10405 | 3910 |
| 3911 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
| 3912 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3913 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3914 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3915 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3916 print_heap_before_gc(); |
| 10405 | 3917 trace_heap_before_gc(_gc_tracer_stw); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3918 |
| 2152 | 3919 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3920 verify_dirty_young_regions(); |
| 2152 | 3921 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3922 // 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
|
3923 // 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
|
3924 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3925 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3926 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3927 // 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
|
3928 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3929 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3930 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3931 // 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
|
3932 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
|
3933 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3934 // 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
|
3935 // 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
|
3936 // 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
|
3937 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
|
3938 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3939 // 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
|
3940 { |
| 10405 | 3941 EvacuationInfo evacuation_info; |
| 3942 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3943 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3944 // 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
|
3945 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3946 increment_old_marking_cycles_started(); |
| 10405 | 3947 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
|
3948 } |
| 10405 | 3949 |
| 3950 _gc_tracer_stw->report_yc_type(yc_type()); | |
| 3951 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3952 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 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 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
|
3955 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
|
3956 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
|
3957 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3958 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3959 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3960 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3961 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3962 |
| 2361 | 3963 // If the secondary_free_list is not empty, append it to the |
| 3964 // free_list. No need to wait for the cleanup operation to finish; | |
| 3965 // the region allocation code will check the secondary_free_list | |
| 3966 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3967 // set, skip this step so that the region allocation code has to | |
| 3968 // get entries from the secondary_free_list. | |
| 2152 | 3969 if (!G1StressConcRegionFreeing) { |
| 2361 | 3970 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3971 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3972 |
| 12080 | 3973 assert(check_young_list_well_formed(), "young list should be well formed"); |
| 3974 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3975 "sanity check"); | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3976 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3977 // 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
|
3978 // 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
|
3979 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3980 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3981 { // 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
|
3982 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3983 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3984 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3985 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
|
3986 increment_gc_time_stamp(); |
| 342 | 3987 |
|
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
|
3988 verify_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3989 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3990 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3991 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3992 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3993 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3994 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3995 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3996 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3998 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3999 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4000 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4001 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4002 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4003 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4004 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4005 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4006 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4007 // 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
|
4008 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4009 release_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4010 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4011 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4012 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4013 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4014 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4015 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4016 // 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
|
4017 // 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
|
4018 // 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
|
4019 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4020 // 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
|
4021 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 // 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
|
4024 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4025 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4026 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4027 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4028 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4029 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
|
4030 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4031 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4032 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
|
4033 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4034 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4035 // 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
|
4036 // 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
|
4037 // 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
|
4038 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4039 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
|
4040 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4041 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4042 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
|
4043 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
|
4044 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4045 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
|
4046 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4047 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4048 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4049 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4050 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4051 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4052 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4053 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4054 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4055 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4056 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4057 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4058 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4059 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
|
4060 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4061 |
| 10405 | 4062 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4063 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4064 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4065 // 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
|
4066 // 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
|
4067 // 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
|
4068 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4069 _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
|
4070 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4071 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4072 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4073 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4074 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4075 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4076 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4077 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4078 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4080 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4081 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4082 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4087 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4088 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4089 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4090 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4091 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4092 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4093 #endif // ASSERT |
| 1707 | 4094 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4095 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4096 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4097 // Initialize the GC alloc regions. |
| 10405 | 4098 init_gc_alloc_regions(evacuation_info); |
|
3979
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 // Actually do the work... |
| 10405 | 4101 evacuate_collection_set(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4103 // 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
|
4104 // (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
|
4105 // 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
|
4106 // 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
|
4107 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4108 _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
|
4109 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4110 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4111 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4112 |
| 10405 | 4113 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4114 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4115 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4117 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4118 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4119 g1_policy()->start_incremental_cset_building(); |
|
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 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4130 "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
|
4131 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4132 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4133 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4134 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4135 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4136 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4137 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
| 10405 | 4138 _young_list->first_survivor_region(), |
| 4139 _young_list->last_survivor_region()); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4140 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4141 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4142 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4143 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4144 _summary_bytes_used = recalculate_used(); |
| 10405 | 4145 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
| 4146 for (uint i = 0; i < n_queues; i++) { | |
| 4147 if (_evacuation_failed_info_array[i].has_failed()) { | |
| 4148 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
| 4149 } | |
| 4150 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4151 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4152 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4155 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4158 // 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
|
4159 // 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
|
4160 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4163 // 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
|
4164 // 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
|
4165 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4169 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4170 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4173 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
|
4174 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4175 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4177 |
|
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 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4180 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4181 size_t bytes_before = capacity(); |
| 4785 | 4182 // No need for an ergo verbose message here, |
| 4183 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4184 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4185 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4186 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4187 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4188 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4189 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4190 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4191 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4192 |
| 10405 | 4193 // 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
|
4194 // 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
|
4195 _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
|
4196 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4197 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4198 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4199 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4200 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4201 // 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
|
4202 // 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
|
4203 // 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
|
4204 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
|
4205 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
| 10405 | 4206 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
|
4207 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4208 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4209 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4210 // 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
|
4211 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4212 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4213 // 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
|
4214 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4215 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4216 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4217 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4218 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4219 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4220 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4221 // 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
|
4222 // 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
|
4223 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4224 // 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
|
4225 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4226 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4227 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4228 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4229 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4230 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4231 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4232 |
|
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
|
4233 verify_after_gc(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4234 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4235 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4236 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4237 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4238 // 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
|
4239 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4240 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4241 // 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
|
4242 // 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
|
4243 // 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
|
4244 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4245 _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
|
4246 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4247 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4248 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4249 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4250 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4251 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4252 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4253 #endif |
| 342 | 4254 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4255 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4256 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4257 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4258 // 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
|
4259 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
|
4260 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4261 // 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
|
4262 // 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
|
4263 // 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
|
4264 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4265 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4266 _hrs.verify_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4267 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4268 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4269 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
|
4270 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4271 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4272 print_heap_after_gc(); |
| 10405 | 4273 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
|
4274 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4275 // 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
|
4276 // 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
|
4277 // 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
|
4278 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4279 g1mm()->update_sizes(); |
| 10405 | 4280 |
| 4281 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
| 4282 _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
|
4283 _gc_timer_stw->register_gc_end(); |
| 10405 | 4284 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
| 4285 } | |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4286 // 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
|
4287 // 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
|
4288 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4289 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4290 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4291 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4292 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4293 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4294 // 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
|
4295 // 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
|
4296 // not start until the safepoint itself is released in |
| 20192 | 4297 // SuspendibleThreadSet::desynchronize(). |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4298 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4299 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4300 |
| 1973 | 4301 return true; |
| 342 | 4302 } |
| 4303 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4304 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4305 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4306 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4307 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4308 case GCAllocForSurvived: |
| 6595 | 4309 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4310 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4311 case GCAllocForTenured: |
| 6595 | 4312 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4313 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4314 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4315 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4316 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4317 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4318 } |
| 6595 | 4319 |
| 4320 // Prevent humongous PLAB sizes for two reasons: | |
| 4321 // * PLABs are allocated using a similar paths as oops, but should | |
| 4322 // never be in a humongous region | |
| 4323 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4324 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
|
4325 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4326 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4327 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4328 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4329 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4330 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4331 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4332 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4333 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4334 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4335 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4336 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4337 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
|
4338 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
|
4339 _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
|
4340 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4341 // 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
|
4342 // 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
|
4343 // b) it's already full (no point in using it), |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4344 // 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
tonyp
parents:
3824
diff
changeset
|
4345 // 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
|
4346 // 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
|
4347 // during a cleanup and was added to the free list, but |
| 10405 | 4348 // has been subsequently used to allocate a humongous |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4349 // 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
|
4350 if (retained_region != NULL && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4351 !retained_region->in_collection_set() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4352 !(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
|
4353 !retained_region->is_empty() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4354 !retained_region->isHumongous()) { |
|
20274
a8137787acfe
8047821: G1 Does not use the save_marks functionality as intended
mgerdin
parents:
20270
diff
changeset
|
4355 retained_region->record_top_and_timestamp(); |
| 4072 | 4356 // The retained region was added to the old region set when it was |
| 4357 // retired. We have to remove it now, since we don't allow regions | |
| 4358 // we allocate to in the region sets. We'll re-add it later, when | |
| 4359 // it's retired again. | |
| 4360 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4361 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
|
4362 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:
3824
diff
changeset
|
4363 _old_gc_alloc_region.set(retained_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4364 _hr_printer.reuse(retained_region); |
| 10405 | 4365 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
| 4366 } | |
| 4367 } | |
| 4368 | |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4369 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
|
4370 assert_at_safepoint(true /* should_be_vm_thread */); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4371 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4372 _survivor_gc_alloc_region.init(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4373 _old_gc_alloc_region.init(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4374 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4375 use_retained_old_gc_alloc_region(evacuation_info); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4376 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4377 |
| 10405 | 4378 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { |
| 4379 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
| 4380 _old_gc_alloc_region.count()); | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4381 _survivor_gc_alloc_region.release(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4382 // 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
|
4383 // _retained_old_gc_alloc_region. If we don't |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
4384 // _retained_old_gc_alloc_region will become NULL. This is what we |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
4385 // want either way so no reason to check explicitly for either |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
4386 // condition. |
|
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|
4387 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 6595 | 4388 |
| 4389 if (ResizePLAB) { | |
| 6819 | 4390 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
| 4391 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
| 6595 | 4392 } |
| 342 | 4393 } |
| 4394 | |
|
3830
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
4395 void G1CollectedHeap::abandon_gc_alloc_regions() { |
|
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|
4396 assert(_survivor_gc_alloc_region.get() == NULL, "pre-condition"); |
|
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|
4397 assert(_old_gc_alloc_region.get() == NULL, "pre-condition"); |
|
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|
4398 _retained_old_gc_alloc_region = NULL; |
| 342 | 4399 } |
| 4400 | |
| 4401 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4402 _drain_in_progress = false; | |
| 4403 set_evac_failure_closure(cl); | |
| 6197 | 4404 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4405 } |
| 4406 | |
| 4407 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4408 assert(_evac_failure_scan_stack != NULL && | |
| 4409 _evac_failure_scan_stack->length() == 0, | |
| 4410 "Postcondition"); | |
| 4411 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4412 delete _evac_failure_scan_stack; |
| 342 | 4413 _evac_failure_scan_stack = NULL; |
| 4414 } | |
| 4415 | |
| 4416 void G1CollectedHeap::remove_self_forwarding_pointers() { | |
|
4783
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7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4417 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4418 |
|
17757
eff02b5bd56c
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|
4419 double remove_self_forwards_start = os::elapsedTime(); |
|
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4420 |
|
4783
023652e49ac0
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|
4421 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4422 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4423 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4424 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4425 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4426 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
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595
diff
changeset
|
4427 } else { |
|
4783
023652e49ac0
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|
4428 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4429 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4430 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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changeset
|
4431 assert(check_cset_heap_region_claim_values(HeapRegion::ParEvacFailureClaimValue), "sanity"); |
|
023652e49ac0
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|
4432 |
|
023652e49ac0
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changeset
|
4433 // Reset the claim values in the regions in the collection set. |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4434 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4435 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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changeset
|
4436 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4437 |
| 4438 // Now restore saved marks, if any. | |
|
8038
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8002144: G1: large number of evacuation failures may lead to large c heap memory usage
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|
4439 assert(_objs_with_preserved_marks.size() == |
|
ad747ee9d0b1
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|
4440 _preserved_marks_of_objs.size(), "Both or none."); |
|
ad747ee9d0b1
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|
4441 while (!_objs_with_preserved_marks.is_empty()) { |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
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|
4442 oop obj = _objs_with_preserved_marks.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
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|
4443 markOop m = _preserved_marks_of_objs.pop(); |
|
ad747ee9d0b1
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|
4444 obj->set_mark(m); |
|
ad747ee9d0b1
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|
4445 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
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changeset
|
4446 _objs_with_preserved_marks.clear(true); |
|
ad747ee9d0b1
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|
4447 _preserved_marks_of_objs.clear(true); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
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|
4448 |
|
eff02b5bd56c
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changeset
|
4449 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
| 342 | 4450 } |
| 4451 | |
| 4452 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4453 _evac_failure_scan_stack->push(obj); | |
| 4454 } | |
| 4455 | |
| 4456 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4457 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4458 | |
| 4459 while (_evac_failure_scan_stack->length() > 0) { | |
| 4460 oop obj = _evac_failure_scan_stack->pop(); | |
| 4461 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4462 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4463 } | |
| 4464 } | |
| 4465 | |
| 4466 oop | |
| 10405 | 4467 G1CollectedHeap::handle_evacuation_failure_par(G1ParScanThreadState* _par_scan_state, |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
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changeset
|
4468 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
|
4469 assert(obj_in_cs(old), |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
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parents:
3317
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changeset
|
4470 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 ...
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3317
diff
changeset
|
4471 (HeapWord*) old)); |
| 342 | 4472 markOop m = old->mark(); |
| 4473 oop forward_ptr = old->forward_to_atomic(old); | |
| 4474 if (forward_ptr == NULL) { | |
| 4475 // Forward-to-self succeeded. | |
| 10405 | 4476 assert(_par_scan_state != NULL, "par scan state"); |
| 4477 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
| 4478 uint queue_num = _par_scan_state->queue_num(); | |
| 4479 | |
| 4480 _evacuation_failed = true; | |
| 4481 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
| 342 | 4482 if (_evac_failure_closure != cl) { |
| 4483 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4484 assert(!_drain_in_progress, | |
| 4485 "Should only be true while someone holds the lock."); | |
| 4486 // Set the global evac-failure closure to the current thread's. | |
| 4487 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4488 set_evac_failure_closure(cl); | |
| 4489 // Now do the common part. | |
| 4490 handle_evacuation_failure_common(old, m); | |
| 4491 // Reset to NULL. | |
| 4492 set_evac_failure_closure(NULL); | |
| 4493 } else { | |
| 4494 // The lock is already held, and this is recursive. | |
| 4495 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4496 handle_evacuation_failure_common(old, m); | |
| 4497 } | |
| 4498 return old; | |
| 4499 } else { | |
|
3323
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
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parents:
3317
diff
changeset
|
4500 // 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
|
4501 // 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
|
4502 // 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
|
4503 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
|
4504 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
|
4505 "should not be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
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parents:
3317
diff
changeset
|
4506 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4507 return forward_ptr; |
| 4508 } | |
| 4509 } | |
| 4510 | |
| 4511 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4512 preserve_mark_if_necessary(old, m); | |
| 4513 | |
| 4514 HeapRegion* r = heap_region_containing(old); | |
| 4515 if (!r->evacuation_failed()) { | |
| 4516 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4517 _hr_printer.evac_failure(r); |
| 342 | 4518 } |
| 4519 | |
| 4520 push_on_evac_failure_scan_stack(old); | |
| 4521 | |
| 4522 if (!_drain_in_progress) { | |
| 4523 // prevent recursion in copy_to_survivor_space() | |
| 4524 _drain_in_progress = true; | |
| 4525 drain_evac_failure_scan_stack(); | |
| 4526 _drain_in_progress = false; | |
| 4527 } | |
| 4528 } | |
| 4529 | |
| 4530 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
|
4531 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4532 // 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
|
4533 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4534 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
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diff
changeset
|
4535 _objs_with_preserved_marks.push(obj); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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7455
diff
changeset
|
4536 _preserved_marks_of_objs.push(m); |
| 342 | 4537 } |
| 4538 } | |
| 4539 | |
| 4540 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4541 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
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|
4542 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
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diff
changeset
|
4543 HeapWord* result = survivor_attempt_allocation(word_size); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
4544 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
4545 return result; |
| 342 | 4546 } else { |
|
3830
f44782f04dd4
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diff
changeset
|
4547 // 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
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diff
changeset
|
4548 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4549 return old_attempt_allocation(word_size); |
| 342 | 4550 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
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|
4551 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4552 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4553 HeapWord* result = old_attempt_allocation(word_size); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4554 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4555 return result; |
| 342 | 4556 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4557 // 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
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3824
diff
changeset
|
4558 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4559 return survivor_attempt_allocation(word_size); |
| 342 | 4560 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4561 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4562 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4563 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4564 // Trying to keep some compilers happy. |
|
f44782f04dd4
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3824
diff
changeset
|
4565 return NULL; |
| 342 | 4566 } |
| 4567 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4568 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
|
4569 ParGCAllocBuffer(gclab_word_size), _retired(true) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4570 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4571 void G1ParCopyHelper::mark_object(oop obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4572 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4573 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4574 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4575 assert(!hr->in_collection_set(), "should not mark objects in the CSet"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4576 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4577 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4578 // 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
|
4579 _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
|
4580 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4581 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4582 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
|
4583 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4584 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
|
4585 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
|
4586 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
|
4587 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4588 HeapRegion* from_hr = _g1->heap_region_containing(from_obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4589 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4590 assert(from_hr->in_collection_set(), "from obj should be in the CSet"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4591 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4592 HeapRegion* to_hr = _g1->heap_region_containing(to_obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4593 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4594 assert(!to_hr->in_collection_set(), "should not mark objects in the CSet"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4595 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4596 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4597 // 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
|
4598 // 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
|
4599 // 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
|
4600 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4601 _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
|
4602 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4603 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4604 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4605 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
|
4606 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
|
4607 _scanned_klass->record_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4608 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4609 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4610 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4611 template <G1Barrier barrier, G1Mark do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4612 template <class T> |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4613 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
|
4614 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
|
4615 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4616 if (oopDesc::is_null(heap_oop)) { |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4617 return; |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4618 } |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4619 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4620 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
|
4621 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4622 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4623 |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4624 if (_g1->in_cset_fast_test(obj)) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4625 oop forwardee; |
| 526 | 4626 if (obj->is_forwarded()) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4627 forwardee = obj->forwardee(); |
| 526 | 4628 } else { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4629 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
| 342 | 4630 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4631 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
|
4632 oopDesc::encode_store_heap_oop(p, forwardee); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4633 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
|
4634 // 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
|
4635 // 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
|
4636 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4637 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4638 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4639 if (barrier == G1BarrierKlass) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4640 do_klass_barrier(p, forwardee); |
| 342 | 4641 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4642 } else { |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4643 // 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
|
4644 // 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
|
4645 if (do_mark_object == G1MarkFromRoot) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4646 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4647 } |
| 526 | 4648 } |
| 4649 | |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4650 if (barrier == G1BarrierEvac) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4651 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4652 } |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4653 } |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4654 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4655 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
|
4656 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
|
4657 |
| 342 | 4658 class G1ParEvacuateFollowersClosure : public VoidClosure { |
| 4659 protected: | |
| 4660 G1CollectedHeap* _g1h; | |
| 4661 G1ParScanThreadState* _par_scan_state; | |
| 4662 RefToScanQueueSet* _queues; | |
| 4663 ParallelTaskTerminator* _terminator; | |
| 4664 | |
| 4665 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4666 RefToScanQueueSet* queues() { return _queues; } | |
| 4667 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4668 | |
| 4669 public: | |
| 4670 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4671 G1ParScanThreadState* par_scan_state, | |
| 4672 RefToScanQueueSet* queues, | |
| 4673 ParallelTaskTerminator* terminator) | |
| 4674 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4675 _queues(queues), _terminator(terminator) {} | |
| 4676 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4677 void do_void(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4678 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4679 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4680 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4681 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4682 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4683 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4684 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4685 pss->start_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4686 const bool res = terminator()->offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4687 pss->end_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4688 return res; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4689 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4690 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4691 void G1ParEvacuateFollowersClosure::do_void() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4692 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4693 pss->trim_queue(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4694 do { |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4695 pss->steal_and_trim_queue(queues()); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4696 } while (!offer_termination()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4697 } |
| 342 | 4698 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4699 class G1KlassScanClosure : public KlassClosure { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4700 G1ParCopyHelper* _closure; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4701 bool _process_only_dirty; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4702 int _count; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4703 public: |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4704 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4705 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4706 void do_klass(Klass* klass) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4707 // If the klass has not been dirtied we know that there's |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4708 // no references into the young gen and we can skip it. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
4709 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
4710 // Clean the klass since we're going to scavenge all the metadata. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
4711 klass->clear_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
4712 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
4713 // Tell the closure that this klass is the Klass to scavenge |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
4714 // and is the one to dirty if oops are left pointing into the young gen. |
|
da91efe96a93
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6629
diff
changeset
|
4715 _closure->set_scanned_klass(klass); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
4716 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
4717 klass->oops_do(_closure); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
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|
4718 |
|
da91efe96a93
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diff
changeset
|
4719 _closure->set_scanned_klass(NULL); |
|
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diff
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|
4720 } |
|
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diff
changeset
|
4721 _count++; |
|
da91efe96a93
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6629
diff
changeset
|
4722 } |
|
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diff
changeset
|
4723 }; |
|
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|
4724 |
| 342 | 4725 class G1ParTask : public AbstractGangTask { |
| 4726 protected: | |
| 4727 G1CollectedHeap* _g1h; | |
| 4728 RefToScanQueueSet *_queues; | |
| 4729 ParallelTaskTerminator _terminator; | |
|
4728
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diff
changeset
|
4730 uint _n_workers; |
| 342 | 4731 |
| 4732 Mutex _stats_lock; | |
| 4733 Mutex* stats_lock() { return &_stats_lock; } | |
| 4734 | |
| 4735 size_t getNCards() { | |
| 4736 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 4737 / G1BlockOffsetSharedArray::N_bytes; | |
| 4738 } | |
| 4739 | |
| 4740 public: | |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4741 G1ParTask(G1CollectedHeap* g1h, RefToScanQueueSet *task_queues) |
| 342 | 4742 : AbstractGangTask("G1 collection"), |
| 4743 _g1h(g1h), | |
| 4744 _queues(task_queues), | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
changeset
|
4745 _terminator(0, _queues), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
changeset
|
4746 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4747 {} |
| 4748 | |
| 4749 RefToScanQueueSet* queues() { return _queues; } | |
| 4750 | |
| 4751 RefToScanQueue *work_queue(int i) { | |
| 4752 return queues()->queue(i); | |
| 4753 } | |
| 4754 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
changeset
|
4755 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
bca17e38de00
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jmasa
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changeset
|
4756 |
|
bca17e38de00
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diff
changeset
|
4757 virtual void set_for_termination(int active_workers) { |
|
bca17e38de00
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changeset
|
4758 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
bca17e38de00
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changeset
|
4759 // in the young space (_par_seq_tasks) in the G1 heap |
|
bca17e38de00
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jmasa
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diff
changeset
|
4760 // for SequentialSubTasksDone. |
|
bca17e38de00
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diff
changeset
|
4761 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
bca17e38de00
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diff
changeset
|
4762 // both of which need setting by set_n_termination(). |
|
bca17e38de00
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diff
changeset
|
4763 _g1h->SharedHeap::set_n_termination(active_workers); |
|
bca17e38de00
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diff
changeset
|
4764 _g1h->set_n_termination(active_workers); |
|
bca17e38de00
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diff
changeset
|
4765 terminator()->reset_for_reuse(active_workers); |
|
bca17e38de00
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changeset
|
4766 _n_workers = active_workers; |
|
bca17e38de00
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diff
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|
4767 } |
|
bca17e38de00
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diff
changeset
|
4768 |
|
20278
2c6ef90f030a
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changeset
|
4769 // Helps out with CLD processing. |
|
2c6ef90f030a
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diff
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|
4770 // |
|
2c6ef90f030a
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diff
changeset
|
4771 // During InitialMark we need to: |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4772 // 1) Scavenge all CLDs for the young GC. |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4773 // 2) Mark all objects directly reachable from strong CLDs. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4774 template <G1Mark do_mark_object> |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4775 class G1CLDClosure : public CLDClosure { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4776 G1ParCopyClosure<G1BarrierNone, do_mark_object>* _oop_closure; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4777 G1ParCopyClosure<G1BarrierKlass, do_mark_object> _oop_in_klass_closure; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4778 G1KlassScanClosure _klass_in_cld_closure; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4779 bool _claim; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
20274
diff
changeset
|
4780 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4781 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4782 G1CLDClosure(G1ParCopyClosure<G1BarrierNone, do_mark_object>* oop_closure, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4783 bool only_young, bool claim) |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4784 : _oop_closure(oop_closure), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4785 _oop_in_klass_closure(oop_closure->g1(), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4786 oop_closure->pss(), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4787 oop_closure->rp()), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4788 _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
|
4789 _claim(claim) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4790 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4791 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4792 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4793 void do_cld(ClassLoaderData* cld) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4794 cld->oops_do(_oop_closure, &_klass_in_cld_closure, _claim); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4795 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4796 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4797 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4798 class G1CodeBlobClosure: public CodeBlobClosure { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4799 OopClosure* _f; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4800 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4801 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4802 G1CodeBlobClosure(OopClosure* f) : _f(f) {} |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4803 void do_code_blob(CodeBlob* blob) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4804 nmethod* that = blob->as_nmethod_or_null(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4805 if (that != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4806 if (!that->test_set_oops_do_mark()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4807 that->oops_do(_f); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4808 that->fix_oop_relocations(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4809 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4810 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4811 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4812 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4813 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4814 void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4815 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 4816 |
| 4817 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
|
4818 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 4819 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4820 { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4821 ResourceMark rm; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4822 HandleMark hm; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4823 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4824 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4825 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4826 G1ParScanThreadState pss(_g1h, worker_id, rp); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4827 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
4828 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4829 pss.set_evac_failure_closure(&evac_failure_cl); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4830 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4831 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4832 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4833 // Non-IM young GC. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4834 G1ParCopyClosure<G1BarrierNone, G1MarkNone> scan_only_root_cl(_g1h, &pss, rp); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4835 G1CLDClosure<G1MarkNone> scan_only_cld_cl(&scan_only_root_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4836 only_young, // Only process dirty klasses. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4837 false); // No need to claim CLDs. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4838 // IM young GC. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4839 // Strong roots closures. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
20274
diff
changeset
|
4840 G1ParCopyClosure<G1BarrierNone, G1MarkFromRoot> scan_mark_root_cl(_g1h, &pss, rp); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4841 G1CLDClosure<G1MarkFromRoot> scan_mark_cld_cl(&scan_mark_root_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4842 false, // Process all klasses. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4843 true); // Need to claim CLDs. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4844 // Weak roots closures. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
20274
diff
changeset
|
4845 G1ParCopyClosure<G1BarrierNone, G1MarkPromotedFromRoot> scan_mark_weak_root_cl(_g1h, &pss, rp); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4846 G1CLDClosure<G1MarkPromotedFromRoot> scan_mark_weak_cld_cl(&scan_mark_weak_root_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
4847 false, // Process all klasses. |
|
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|
4848 true); // Need to claim CLDs. |
|
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|
4849 |
|
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|
4850 G1CodeBlobClosure scan_only_code_cl(&scan_only_root_cl); |
|
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|
4851 G1CodeBlobClosure scan_mark_code_cl(&scan_mark_root_cl); |
|
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|
4852 // IM Weak code roots are handled later. |
|
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|
4853 |
|
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|
4854 OopClosure* strong_root_cl; |
|
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|
4855 OopClosure* weak_root_cl; |
|
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|
4856 CLDClosure* strong_cld_cl; |
|
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|
4857 CLDClosure* weak_cld_cl; |
|
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|
4858 CodeBlobClosure* strong_code_cl; |
|
5986
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|
4859 |
|
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|
4860 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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|
4861 // We also need to mark copied objects. |
|
20278
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|
4862 strong_root_cl = &scan_mark_root_cl; |
|
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|
4863 weak_root_cl = &scan_mark_weak_root_cl; |
|
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|
4864 strong_cld_cl = &scan_mark_cld_cl; |
|
2c6ef90f030a
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|
4865 weak_cld_cl = &scan_mark_weak_cld_cl; |
|
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|
4866 strong_code_cl = &scan_mark_code_cl; |
|
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|
4867 } else { |
|
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changeset
|
4868 strong_root_cl = &scan_only_root_cl; |
|
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|
4869 weak_root_cl = &scan_only_root_cl; |
|
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|
4870 strong_cld_cl = &scan_only_cld_cl; |
|
2c6ef90f030a
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|
4871 weak_cld_cl = &scan_only_cld_cl; |
|
2c6ef90f030a
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|
4872 strong_code_cl = &scan_only_code_cl; |
|
5986
500023bd0818
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5963
diff
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|
4873 } |
|
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5963
diff
changeset
|
4874 |
|
20278
2c6ef90f030a
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diff
changeset
|
4875 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4876 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4877 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4878 pss.start_strong_roots(); |
|
20278
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changeset
|
4879 _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
|
4880 weak_root_cl, |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4881 &push_heap_rs_cl, |
|
2c6ef90f030a
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diff
changeset
|
4882 strong_cld_cl, |
|
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stefank
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diff
changeset
|
4883 weak_cld_cl, |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4884 strong_code_cl, |
|
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diff
changeset
|
4885 worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4886 |
|
5986
500023bd0818
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johnc
parents:
5963
diff
changeset
|
4887 pss.end_strong_roots(); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4888 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4889 { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4890 double start = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4891 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4892 evac.do_void(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4893 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
|
4894 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
|
4895 _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
|
4896 _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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parents:
5963
diff
changeset
|
4897 } |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
4898 _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
|
4899 _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
|
4900 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4901 if (ParallelGCVerbose) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4902 MutexLocker x(stats_lock()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4903 pss.print_termination_stats(worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4904 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4905 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4906 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
|
4907 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4908 // Close the inner scope so that the ResourceMark and HandleMark |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4909 // destructors are executed here and are included as part of the |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4910 // "GC Worker Time". |
| 342 | 4911 } |
| 4912 | |
| 1611 | 4913 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
|
4914 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 4915 } |
| 4916 }; | |
| 4917 | |
| 4918 // *** Common G1 Evacuation Stuff | |
| 4919 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4920 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4921 |
| 342 | 4922 void |
| 4923 G1CollectedHeap:: | |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4924 g1_process_roots(OopClosure* scan_non_heap_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4925 OopClosure* scan_non_heap_weak_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4926 OopsInHeapRegionClosure* scan_rs, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4927 CLDClosure* scan_strong_clds, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4928 CLDClosure* scan_weak_clds, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4929 CodeBlobClosure* scan_strong_code, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4930 uint worker_i) { |
|
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 // First scan the shared roots. |
| 342 | 4933 double ext_roots_start = os::elapsedTime(); |
| 4934 double closure_app_time_sec = 0.0; | |
| 4935 | |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4936 bool during_im = _g1h->g1_policy()->during_initial_mark_pause(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4937 |
| 342 | 4938 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4939 BufferingOopClosure buf_scan_non_heap_weak_roots(scan_non_heap_weak_roots); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4940 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4941 process_roots(false, // no scoping; this is parallel code |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4942 SharedHeap::SO_None, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4943 &buf_scan_non_heap_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4944 &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
|
4945 scan_strong_clds, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4946 // Initial Mark handles the weak CLDs separately. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4947 (during_im ? NULL : scan_weak_clds), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4948 scan_strong_code); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4949 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4950 // Now the CM ref_processor roots. |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4951 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
|
4952 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4953 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4954 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4955 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4956 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4957 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4958 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4959 if (during_im) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4960 // Barrier to make sure all workers passed |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4961 // the strong CLD and strong nmethods phases. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4962 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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20274
diff
changeset
|
4963 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4964 // Now take the complement of the strong CLDs. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4965 ClassLoaderDataGraph::roots_cld_do(NULL, scan_weak_clds); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4966 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4967 |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4968 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 4969 buf_scan_non_heap_roots.done(); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4970 buf_scan_non_heap_weak_roots.done(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4971 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4972 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
parents:
20274
diff
changeset
|
4973 + 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
|
4974 |
|
6219
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|
4975 g1_policy()->phase_times()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
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parents:
3778
diff
changeset
|
4976 |
| 342 | 4977 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
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diff
changeset
|
4978 ((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
|
3823
14a2fd14c0db
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3778
diff
changeset
|
4979 |
|
6219
922993931b3d
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changeset
|
4980 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 4981 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4982 // During conc marking we have to filter the per-thread SATB buffers |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4983 // 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
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4785
diff
changeset
|
4984 // as implicitly live). |
|
6628
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7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
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diff
changeset
|
4985 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4986 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
|
2ace1c4ee8da
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parents:
4785
diff
changeset
|
4987 if (mark_in_progress()) { |
|
6628
bb3f6194fedb
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brutisso
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diff
changeset
|
4988 double satb_filter_start = os::elapsedTime(); |
|
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7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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diff
changeset
|
4989 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4990 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
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diff
changeset
|
4991 |
|
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7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
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diff
changeset
|
4992 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4993 } |
|
2ace1c4ee8da
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parents:
4785
diff
changeset
|
4994 } |
|
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
|
4995 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 4996 |
| 4997 // Now scan the complement of the collection set. | |
|
20278
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changeset
|
4998 MarkingCodeBlobClosure scavenge_cs_nmethods(scan_non_heap_weak_roots, CodeBlobToOopClosure::FixRelocations); |
|
2c6ef90f030a
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|
4999 |
|
2c6ef90f030a
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changeset
|
5000 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
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20254
diff
changeset
|
5001 |
| 342 | 5002 _process_strong_tasks->all_tasks_completed(); |
| 5003 } | |
| 5004 | |
|
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|
5005 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
|
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|
5006 private: |
|
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changeset
|
5007 BoolObjectClosure* _is_alive; |
|
5a32d2a3cc1e
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diff
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|
5008 int _initial_string_table_size; |
|
5a32d2a3cc1e
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diff
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|
5009 int _initial_symbol_table_size; |
|
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8027476: Improve performance of Stringtable unlink
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diff
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|
5010 |
|
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diff
changeset
|
5011 bool _process_strings; |
|
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8027476: Improve performance of Stringtable unlink
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changeset
|
5012 int _strings_processed; |
|
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changeset
|
5013 int _strings_removed; |
|
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changeset
|
5014 |
|
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diff
changeset
|
5015 bool _process_symbols; |
|
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diff
changeset
|
5016 int _symbols_processed; |
|
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changeset
|
5017 int _symbols_removed; |
|
17652
0eb64cfc0b76
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17651
diff
changeset
|
5018 |
|
0eb64cfc0b76
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diff
changeset
|
5019 bool _do_in_parallel; |
|
17634
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|
5020 public: |
|
5a32d2a3cc1e
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changeset
|
5021 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
|
20278
2c6ef90f030a
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changeset
|
5022 AbstractGangTask("String/Symbol Unlinking"), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5023 _is_alive(is_alive), |
|
17652
0eb64cfc0b76
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tschatzl
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17651
diff
changeset
|
5024 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
|
17634
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|
5025 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
|
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|
5026 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
|
5a32d2a3cc1e
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diff
changeset
|
5027 |
|
5a32d2a3cc1e
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diff
changeset
|
5028 _initial_string_table_size = StringTable::the_table()->table_size(); |
|
5a32d2a3cc1e
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diff
changeset
|
5029 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5030 if (process_strings) { |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
5031 StringTable::clear_parallel_claimed_index(); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
5032 } |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
5033 if (process_symbols) { |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
5034 SymbolTable::clear_parallel_claimed_index(); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5035 } |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
5036 } |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
5037 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5038 ~G1StringSymbolTableUnlinkTask() { |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5039 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
|
5040 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
|
5041 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
|
5042 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
|
5043 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5044 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
|
5045 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5046 if (G1TraceStringSymbolTableScrubbing) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5047 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
|
5048 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5049 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
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changeset
|
5050 strings_processed(), strings_removed(), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5051 symbols_processed(), symbols_removed()); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5052 } |
|
17634
5a32d2a3cc1e
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13400
diff
changeset
|
5053 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5054 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5055 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
|
5056 if (_do_in_parallel) { |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5057 int strings_processed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5058 int strings_removed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5059 int symbols_processed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5060 int symbols_removed = 0; |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
5061 if (_process_strings) { |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
5062 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5063 Atomic::add(strings_processed, &_strings_processed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5064 Atomic::add(strings_removed, &_strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5065 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5066 if (_process_symbols) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5067 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
|
5a32d2a3cc1e
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diff
changeset
|
5068 Atomic::add(symbols_processed, &_symbols_processed); |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5069 Atomic::add(symbols_removed, &_symbols_removed); |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
5070 } |
|
5a32d2a3cc1e
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13400
diff
changeset
|
5071 } else { |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
5072 if (_process_strings) { |
|
5a32d2a3cc1e
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13400
diff
changeset
|
5073 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5074 } |
|
5a32d2a3cc1e
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13400
diff
changeset
|
5075 if (_process_symbols) { |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5076 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
|
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diff
changeset
|
5077 } |
|
5a32d2a3cc1e
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13400
diff
changeset
|
5078 } |
|
5a32d2a3cc1e
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13400
diff
changeset
|
5079 } |
|
5a32d2a3cc1e
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13400
diff
changeset
|
5080 |
|
5a32d2a3cc1e
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diff
changeset
|
5081 size_t strings_processed() const { return (size_t)_strings_processed; } |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5082 size_t strings_removed() const { return (size_t)_strings_removed; } |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5083 |
|
5a32d2a3cc1e
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13400
diff
changeset
|
5084 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5085 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
|
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tschatzl
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diff
changeset
|
5086 }; |
|
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13400
diff
changeset
|
5087 |
|
20278
2c6ef90f030a
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changeset
|
5088 class G1CodeCacheUnloadingTask VALUE_OBJ_CLASS_SPEC { |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5089 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5090 static Monitor* _lock; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5091 |
|
2c6ef90f030a
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20274
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changeset
|
5092 BoolObjectClosure* const _is_alive; |
|
2c6ef90f030a
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changeset
|
5093 const bool _unloading_occurred; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5094 const uint _num_workers; |
|
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|
5095 |
|
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|
5096 // Variables used to claim nmethods. |
|
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|
5097 nmethod* _first_nmethod; |
|
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|
5098 volatile nmethod* _claimed_nmethod; |
|
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|
5099 |
|
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|
5100 // The list of nmethods that need to be processed by the second pass. |
|
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|
5101 volatile nmethod* _postponed_list; |
|
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|
5102 volatile uint _num_entered_barrier; |
|
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|
5103 |
|
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|
5104 public: |
|
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|
5105 G1CodeCacheUnloadingTask(uint num_workers, BoolObjectClosure* is_alive, bool unloading_occurred) : |
|
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|
5106 _is_alive(is_alive), |
|
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|
5107 _unloading_occurred(unloading_occurred), |
|
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|
5108 _num_workers(num_workers), |
|
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|
5109 _first_nmethod(NULL), |
|
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|
5110 _claimed_nmethod(NULL), |
|
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|
5111 _postponed_list(NULL), |
|
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|
5112 _num_entered_barrier(0) |
|
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|
5113 { |
|
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|
5114 nmethod::increase_unloading_clock(); |
|
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|
5115 _first_nmethod = CodeCache::alive_nmethod(CodeCache::first()); |
|
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|
5116 _claimed_nmethod = (volatile nmethod*)_first_nmethod; |
|
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|
5117 } |
|
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|
5118 |
|
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|
5119 ~G1CodeCacheUnloadingTask() { |
|
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|
5120 CodeCache::verify_clean_inline_caches(); |
|
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|
5121 |
|
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|
5122 CodeCache::set_needs_cache_clean(false); |
|
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|
5123 guarantee(CodeCache::scavenge_root_nmethods() == NULL, "Must be"); |
|
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|
5124 |
|
2c6ef90f030a
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|
5125 CodeCache::verify_icholder_relocations(); |
|
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|
5126 } |
|
2c6ef90f030a
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|
5127 |
|
2c6ef90f030a
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|
5128 private: |
|
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|
5129 void add_to_postponed_list(nmethod* nm) { |
|
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|
5130 nmethod* old; |
|
2c6ef90f030a
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|
5131 do { |
|
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|
5132 old = (nmethod*)_postponed_list; |
|
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|
5133 nm->set_unloading_next(old); |
|
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|
5134 } while ((nmethod*)Atomic::cmpxchg_ptr(nm, &_postponed_list, old) != old); |
|
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|
5135 } |
|
2c6ef90f030a
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|
5136 |
|
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|
5137 void clean_nmethod(nmethod* nm) { |
|
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|
5138 bool postponed = nm->do_unloading_parallel(_is_alive, _unloading_occurred); |
|
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|
5139 |
|
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|
5140 if (postponed) { |
|
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|
5141 // This nmethod referred to an nmethod that has not been cleaned/unloaded yet. |
|
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|
5142 add_to_postponed_list(nm); |
|
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|
5143 } |
|
2c6ef90f030a
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changeset
|
5144 |
|
2c6ef90f030a
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changeset
|
5145 // Mark that this thread has been cleaned/unloaded. |
|
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|
5146 // After this call, it will be safe to ask if this nmethod was unloaded or not. |
|
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|
5147 nm->set_unloading_clock(nmethod::global_unloading_clock()); |
|
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|
5148 } |
|
2c6ef90f030a
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diff
changeset
|
5149 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
5150 void clean_nmethod_postponed(nmethod* nm) { |
|
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|
5151 nm->do_unloading_parallel_postponed(_is_alive, _unloading_occurred); |
|
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|
5152 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5153 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5154 static const int MaxClaimNmethods = 16; |
|
2c6ef90f030a
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|
5155 |
|
2c6ef90f030a
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|
5156 void claim_nmethods(nmethod** claimed_nmethods, int *num_claimed_nmethods) { |
|
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|
5157 nmethod* first; |
|
2c6ef90f030a
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diff
changeset
|
5158 nmethod* last; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5159 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5160 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5161 *num_claimed_nmethods = 0; |
|
2c6ef90f030a
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diff
changeset
|
5162 |
|
2c6ef90f030a
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diff
changeset
|
5163 first = last = (nmethod*)_claimed_nmethod; |
|
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diff
changeset
|
5164 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5165 if (first != NULL) { |
|
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changeset
|
5166 for (int i = 0; i < MaxClaimNmethods; i++) { |
|
2c6ef90f030a
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changeset
|
5167 last = CodeCache::alive_nmethod(CodeCache::next(last)); |
|
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changeset
|
5168 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5169 if (last == NULL) { |
|
2c6ef90f030a
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diff
changeset
|
5170 break; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5171 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5172 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5173 claimed_nmethods[i] = last; |
|
2c6ef90f030a
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|
5174 (*num_claimed_nmethods)++; |
|
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stefank
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diff
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|
5175 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5176 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5177 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5178 } while ((nmethod*)Atomic::cmpxchg_ptr(last, &_claimed_nmethod, first) != first); |
|
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|
5179 } |
|
2c6ef90f030a
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diff
changeset
|
5180 |
|
2c6ef90f030a
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changeset
|
5181 nmethod* claim_postponed_nmethod() { |
|
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diff
changeset
|
5182 nmethod* claim; |
|
2c6ef90f030a
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diff
changeset
|
5183 nmethod* next; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5184 |
|
2c6ef90f030a
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diff
changeset
|
5185 do { |
|
2c6ef90f030a
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changeset
|
5186 claim = (nmethod*)_postponed_list; |
|
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|
5187 if (claim == NULL) { |
|
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diff
changeset
|
5188 return NULL; |
|
2c6ef90f030a
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diff
changeset
|
5189 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5190 |
|
2c6ef90f030a
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diff
changeset
|
5191 next = claim->unloading_next(); |
|
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diff
changeset
|
5192 |
|
2c6ef90f030a
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changeset
|
5193 } while ((nmethod*)Atomic::cmpxchg_ptr(next, &_postponed_list, claim) != claim); |
|
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changeset
|
5194 |
|
2c6ef90f030a
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diff
changeset
|
5195 return claim; |
|
2c6ef90f030a
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diff
changeset
|
5196 } |
|
2c6ef90f030a
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diff
changeset
|
5197 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5198 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5199 // Mark that we're done with the first pass of nmethod cleaning. |
|
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changeset
|
5200 void barrier_mark(uint worker_id) { |
|
2c6ef90f030a
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changeset
|
5201 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
|
2c6ef90f030a
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changeset
|
5202 _num_entered_barrier++; |
|
2c6ef90f030a
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changeset
|
5203 if (_num_entered_barrier == _num_workers) { |
|
2c6ef90f030a
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diff
changeset
|
5204 ml.notify_all(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5205 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5206 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5207 |
|
2c6ef90f030a
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diff
changeset
|
5208 // See if we have to wait for the other workers to |
|
2c6ef90f030a
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diff
changeset
|
5209 // finish their first-pass nmethod cleaning work. |
|
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diff
changeset
|
5210 void barrier_wait(uint worker_id) { |
|
2c6ef90f030a
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diff
changeset
|
5211 if (_num_entered_barrier < _num_workers) { |
|
2c6ef90f030a
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changeset
|
5212 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
|
2c6ef90f030a
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changeset
|
5213 while (_num_entered_barrier < _num_workers) { |
|
2c6ef90f030a
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diff
changeset
|
5214 ml.wait(Mutex::_no_safepoint_check_flag, 0, false); |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5215 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5216 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5217 } |
|
2c6ef90f030a
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diff
changeset
|
5218 |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5219 // 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
|
5220 // to the second pass, when we know which nmethods survive. |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5221 void work_first_pass(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5222 // The first nmethods is claimed by the first worker. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5223 if (worker_id == 0 && _first_nmethod != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5224 clean_nmethod(_first_nmethod); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5225 _first_nmethod = NULL; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5226 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5227 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5228 int num_claimed_nmethods; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5229 nmethod* claimed_nmethods[MaxClaimNmethods]; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5230 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5231 while (true) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5232 claim_nmethods(claimed_nmethods, &num_claimed_nmethods); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5233 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5234 if (num_claimed_nmethods == 0) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5235 break; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5236 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5237 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5238 for (int i = 0; i < num_claimed_nmethods; i++) { |
|
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diff
changeset
|
5239 clean_nmethod(claimed_nmethods[i]); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5240 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5241 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5242 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5243 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5244 void work_second_pass(uint worker_id) { |
|
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diff
changeset
|
5245 nmethod* nm; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5246 // Take care of postponed nmethods. |
|
2c6ef90f030a
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diff
changeset
|
5247 while ((nm = claim_postponed_nmethod()) != NULL) { |
|
2c6ef90f030a
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diff
changeset
|
5248 clean_nmethod_postponed(nm); |
|
2c6ef90f030a
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diff
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|
5249 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5250 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5251 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5252 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5253 Monitor* G1CodeCacheUnloadingTask::_lock = new Monitor(Mutex::leaf, "Code Cache Unload lock"); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5254 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5255 class G1KlassCleaningTask : public StackObj { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
5256 BoolObjectClosure* _is_alive; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5257 volatile jint _clean_klass_tree_claimed; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
5258 ClassLoaderDataGraphKlassIteratorAtomic _klass_iterator; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5259 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5260 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5261 G1KlassCleaningTask(BoolObjectClosure* is_alive) : |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5262 _is_alive(is_alive), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5263 _clean_klass_tree_claimed(0), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5264 _klass_iterator() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5265 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5266 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5267 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5268 bool claim_clean_klass_tree_task() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5269 if (_clean_klass_tree_claimed) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5270 return false; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5271 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5272 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
5273 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
|
5274 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5275 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
5276 InstanceKlass* claim_next_klass() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5277 Klass* klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5278 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5279 klass =_klass_iterator.next_klass(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5280 } 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
|
5281 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5282 return (InstanceKlass*)klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5283 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5284 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5285 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5286 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5287 void clean_klass(InstanceKlass* ik) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5288 ik->clean_implementors_list(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5289 ik->clean_method_data(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5290 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5291 // G1 specific cleanup work that has |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5292 // been moved here to be done in parallel. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5293 ik->clean_dependent_nmethods(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5294 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5295 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5296 void work() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5297 ResourceMark rm; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5298 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5299 // 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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diff
changeset
|
5300 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
|
5301 Klass::clean_subklass_tree(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5302 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5303 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5304 // All workers will help cleaning the classes, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5305 InstanceKlass* klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5306 while ((klass = claim_next_klass()) != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5307 clean_klass(klass); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5308 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5309 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5310 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5311 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5312 // To minimize the remark pause times, the tasks below are done in parallel. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5313 class G1ParallelCleaningTask : public AbstractGangTask { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5314 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5315 G1StringSymbolTableUnlinkTask _string_symbol_task; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5316 G1CodeCacheUnloadingTask _code_cache_task; |
|
2c6ef90f030a
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diff
changeset
|
5317 G1KlassCleaningTask _klass_cleaning_task; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5318 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5319 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5320 // The constructor is run in the VMThread. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5321 G1ParallelCleaningTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols, uint num_workers, bool unloading_occurred) : |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5322 AbstractGangTask("Parallel Cleaning"), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5323 _string_symbol_task(is_alive, process_strings, process_symbols), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5324 _code_cache_task(num_workers, is_alive, unloading_occurred), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5325 _klass_cleaning_task(is_alive) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5326 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5327 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5328 // The parallel work done by all worker threads. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5329 void work(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5330 // Do first pass of code cache cleaning. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5331 _code_cache_task.work_first_pass(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5332 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5333 // Let the threads, mark that the first pass is done. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5334 _code_cache_task.barrier_mark(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5335 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5336 // Clean the Strings and Symbols. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5337 _string_symbol_task.work(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5338 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5339 // Wait for all workers to finish the first code cache cleaning pass. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5340 _code_cache_task.barrier_wait(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5341 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5342 // Do the second code cache cleaning work, which realize on |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5343 // the liveness information gathered during the first pass. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
5344 _code_cache_task.work_second_pass(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5345 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5346 // Clean all klasses that were not unloaded. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5347 _klass_cleaning_task.work(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5348 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5349 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5350 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5351 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
20274
diff
changeset
|
5352 void G1CollectedHeap::parallel_cleaning(BoolObjectClosure* is_alive, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5353 bool process_strings, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5354 bool process_symbols, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5355 bool class_unloading_occurred) { |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5356 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
20278
2c6ef90f030a
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parents:
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diff
changeset
|
5357 workers()->active_workers() : 1); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5358 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5359 G1ParallelCleaningTask g1_unlink_task(is_alive, process_strings, process_symbols, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5360 n_workers, class_unloading_occurred); |
|
17634
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
5361 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
5a32d2a3cc1e
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tschatzl
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diff
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|
5362 set_par_threads(n_workers); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5363 workers()->run_task(&g1_unlink_task); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5364 set_par_threads(0); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5365 } else { |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
5366 g1_unlink_task.work(0); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5367 } |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5368 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5369 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5370 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5371 bool process_strings, bool process_symbols) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5372 { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5373 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5374 _g1h->workers()->active_workers() : 1); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5375 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5376 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5377 set_par_threads(n_workers); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5378 workers()->run_task(&g1_unlink_task); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5379 set_par_threads(0); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5380 } else { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5381 g1_unlink_task.work(0); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5382 } |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5383 } |
| 17764 | 5384 |
| 5385 if (G1StringDedup::is_enabled()) { | |
| 5386 G1StringDedup::unlink(is_alive); | |
| 5387 } | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5388 } |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
5389 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5390 class G1RedirtyLoggedCardsTask : public AbstractGangTask { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5391 private: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5392 DirtyCardQueueSet* _queue; |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5393 public: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5394 G1RedirtyLoggedCardsTask(DirtyCardQueueSet* queue) : AbstractGangTask("Redirty Cards"), _queue(queue) { } |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5395 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5396 virtual void work(uint worker_id) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5397 double start_time = os::elapsedTime(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5398 |
|
20217
6b52700a896b
8040002: Clean up code and code duplication in re-diryting cards for verification
tschatzl
parents:
20216
diff
changeset
|
5399 RedirtyLoggedCardTableEntryClosure cl; |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5400 if (G1CollectedHeap::heap()->use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5401 _queue->par_apply_closure_to_all_completed_buffers(&cl); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5402 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5403 _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
|
5404 } |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5405 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5406 G1GCPhaseTimes* timer = G1CollectedHeap::heap()->g1_policy()->phase_times(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5407 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
parents:
20215
diff
changeset
|
5408 timer->record_redirty_logged_cards_processed_cards(worker_id, cl.num_processed()); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5409 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5410 }; |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5411 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5412 void G1CollectedHeap::redirty_logged_cards() { |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5413 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5414 double redirty_logged_cards_start = os::elapsedTime(); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5415 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5416 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5417 _g1h->workers()->active_workers() : 1); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5418 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5419 G1RedirtyLoggedCardsTask redirty_task(&dirty_card_queue_set()); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5420 dirty_card_queue_set().reset_for_par_iteration(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5421 if (use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5422 set_par_threads(n_workers); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5423 workers()->run_task(&redirty_task); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5424 set_par_threads(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5425 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5426 redirty_task.work(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5427 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5428 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5429 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5430 dcq.merge_bufferlists(&dirty_card_queue_set()); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5431 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:
17755
diff
changeset
|
5432 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5433 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
|
5434 } |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5435 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5436 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5437 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5438 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5439 // 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
|
5440 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5442 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5443 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5444 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5448 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5450 return false; |
|
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 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5453 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5455 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5456 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5457 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5458 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5459 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5460 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5461 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5462 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5463 public: |
|
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|
5464 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
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|
5465 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
4dfb2df418f2
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changeset
|
5466 void do_oop( oop* p) { |
|
4dfb2df418f2
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changeset
|
5467 oop obj = *p; |
|
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diff
changeset
|
5468 |
|
4dfb2df418f2
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diff
changeset
|
5469 if (_g1->obj_in_cs(obj)) { |
|
4dfb2df418f2
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changeset
|
5470 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
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diff
changeset
|
5471 *p = obj->forwardee(); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5472 } |
|
4dfb2df418f2
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diff
changeset
|
5473 } |
|
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changeset
|
5474 }; |
|
4dfb2df418f2
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diff
changeset
|
5475 |
|
4dfb2df418f2
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changeset
|
5476 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
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changeset
|
5477 // serial and parallel code as long as different worker |
|
4dfb2df418f2
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changeset
|
5478 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
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diff
changeset
|
5479 // and different queues. |
|
4dfb2df418f2
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diff
changeset
|
5480 |
|
4dfb2df418f2
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changeset
|
5481 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
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changeset
|
5482 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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changeset
|
5483 OopClosure* _copy_non_heap_obj_cl; |
|
4dfb2df418f2
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changeset
|
5484 G1ParScanThreadState* _par_scan_state; |
|
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changeset
|
5485 |
|
4dfb2df418f2
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changeset
|
5486 public: |
|
4dfb2df418f2
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diff
changeset
|
5487 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
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changeset
|
5488 OopClosure* non_heap_obj_cl, |
|
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changeset
|
5489 G1ParScanThreadState* pss): |
|
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changeset
|
5490 _g1h(g1h), |
|
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changeset
|
5491 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
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changeset
|
5492 _par_scan_state(pss) |
|
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changeset
|
5493 {} |
|
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changeset
|
5494 |
|
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changeset
|
5495 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
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changeset
|
5496 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
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changeset
|
5497 |
|
4dfb2df418f2
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changeset
|
5498 template <class T> void do_oop_work(T* p) { |
|
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changeset
|
5499 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
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changeset
|
5500 |
|
4dfb2df418f2
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diff
changeset
|
5501 if (_g1h->obj_in_cs(obj)) { |
|
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changeset
|
5502 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
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changeset
|
5503 // to a new location or to itself in the event of an |
|
4dfb2df418f2
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diff
changeset
|
5504 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
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changeset
|
5505 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
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changeset
|
5506 // heap, update the RSet for the referent. |
|
4dfb2df418f2
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parents:
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changeset
|
5507 // |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5508 // If the referent has not been forwarded then we have to keep |
|
4dfb2df418f2
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diff
changeset
|
5509 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
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parents:
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changeset
|
5510 // |
|
4dfb2df418f2
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changeset
|
5511 // If the reference field is in the G1 heap then we can push |
|
4dfb2df418f2
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changeset
|
5512 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
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diff
changeset
|
5513 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
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diff
changeset
|
5514 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5515 // 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
|
5516 // use the the non-heap or metadata closures directly to copy |
| 10405 | 5517 // the referent object and update the pointer, while avoiding |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5518 // updating the RSet. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5519 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5520 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5521 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5522 } else { |
|
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17866
diff
changeset
|
5523 assert(!Metaspace::contains((const void*)p), |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5524 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
|
5525 PTR_FORMAT, p)); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5526 _copy_non_heap_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5527 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5528 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5529 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5530 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5531 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5532 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5533 // closure for each discovered list in some of the |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5534 // reference processing phases. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5535 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5536 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5537 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5538 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5539 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5540 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5541 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5542 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5543 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5544 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5545 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5546 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5547 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5548 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5549 void do_void() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5550 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5551 pss->trim_queue(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5552 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5553 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5554 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5555 // Parallel Reference Processing closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5556 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5557 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5558 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5559 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5560 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5561 private: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5562 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5563 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5564 FlexibleWorkGang* _workers; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5565 int _active_workers; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5566 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5567 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5568 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5569 FlexibleWorkGang* workers, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5570 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5571 int n_workers) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5572 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5573 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5574 _workers(workers), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5575 _active_workers(n_workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5576 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5577 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5578 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5579 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5580 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5581 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5582 virtual void execute(EnqueueTask& task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5583 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5584 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5585 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5586 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5587 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5588 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5589 ProcessTask& _proc_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5590 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
5591 RefToScanQueueSet *_task_queues; |
|
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|
5592 ParallelTaskTerminator* _terminator; |
|
4dfb2df418f2
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changeset
|
5593 |
|
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diff
changeset
|
5594 public: |
|
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diff
changeset
|
5595 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
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|
5596 G1CollectedHeap* g1h, |
|
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changeset
|
5597 RefToScanQueueSet *task_queues, |
|
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|
5598 ParallelTaskTerminator* terminator) : |
|
4dfb2df418f2
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|
5599 AbstractGangTask("Process reference objects in parallel"), |
|
4dfb2df418f2
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changeset
|
5600 _proc_task(proc_task), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5601 _g1h(g1h), |
|
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diff
changeset
|
5602 _task_queues(task_queues), |
|
4dfb2df418f2
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changeset
|
5603 _terminator(terminator) |
|
4dfb2df418f2
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parents:
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|
5604 {} |
|
4dfb2df418f2
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changeset
|
5605 |
|
4728
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|
5606 virtual void work(uint worker_id) { |
|
3979
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|
5607 // The reference processing task executed by a single worker. |
|
4dfb2df418f2
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changeset
|
5608 ResourceMark rm; |
|
4dfb2df418f2
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diff
changeset
|
5609 HandleMark hm; |
|
4dfb2df418f2
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changeset
|
5610 |
|
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changeset
|
5611 G1STWIsAliveClosure is_alive(_g1h); |
|
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changeset
|
5612 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
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|
5613 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
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|
5614 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
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diff
changeset
|
5615 |
|
3979
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|
5616 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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changeset
|
5617 |
|
4dfb2df418f2
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changeset
|
5618 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
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changeset
|
5619 |
|
4dfb2df418f2
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changeset
|
5620 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
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|
5621 |
|
4dfb2df418f2
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changeset
|
5622 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
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|
5623 |
|
4dfb2df418f2
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changeset
|
5624 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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|
5625 // We also need to mark copied objects. |
|
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parents:
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diff
changeset
|
5626 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
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parents:
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|
5627 } |
|
4dfb2df418f2
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parents:
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changeset
|
5628 |
|
4dfb2df418f2
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changeset
|
5629 // Keep alive closure. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5630 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
|
3979
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|
5631 |
|
4dfb2df418f2
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changeset
|
5632 // Complete GC closure |
|
4dfb2df418f2
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parents:
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changeset
|
5633 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
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changeset
|
5634 |
|
4dfb2df418f2
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changeset
|
5635 // Call the reference processing task's work routine. |
|
4728
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changeset
|
5636 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
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|
5637 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5638 // Note we cannot assert that the refs array is empty here as not all |
|
4dfb2df418f2
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parents:
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changeset
|
5639 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
4dfb2df418f2
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|
5640 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
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parents:
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changeset
|
5641 // the queue may not be empty. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5642 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5643 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5644 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5645 // Driver routine for parallel reference processing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5646 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
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diff
changeset
|
5647 // task and has the worker threads execute it. |
|
4dfb2df418f2
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changeset
|
5648 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5649 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5650 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5651 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5652 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5653 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5654 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5655 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5656 _g1h->set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5657 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5658 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5659 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5660 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5661 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5662 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5663 EnqueueTask& _enq_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5664 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5665 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5666 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5667 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5668 _enq_task(enq_task) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5669 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5671 virtual void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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diff
changeset
|
5672 _enq_task.work(worker_id); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5673 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5674 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5675 |
| 10405 | 5676 // Driver routine for parallel reference enqueueing. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5677 // Creates an instance of the ref enqueueing gang |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5678 // task and has the worker threads execute it. |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5679 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5680 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5681 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5682 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5683 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5684 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5685 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5686 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5687 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5688 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5689 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5690 // End of weak reference support closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5691 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5692 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5693 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5694 // objects discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5695 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5696 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5697 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5698 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5699 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5700 ParallelTaskTerminator _terminator; |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5701 uint _n_workers; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5702 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5703 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5705 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 _queues(task_queues), |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5708 _terminator(workers, _queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5709 _n_workers(workers) |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5710 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5711 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5712 void work(uint worker_id) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5713 ResourceMark rm; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5714 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5715 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5716 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5717 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5718 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5719 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5721 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
|
5722 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
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 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5728 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5729 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5730 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5731 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5732 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5735 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5736 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5737 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5738 // to be copied. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5739 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5740 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5741 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5743 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
|
5744 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5745 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5746 // 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
|
5747 // 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
|
5748 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5749 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5750 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5751 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5752 // 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
|
5753 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5754 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5755 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5756 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5757 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5758 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5759 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5760 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5761 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5762 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5763 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5764 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5765 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5766 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5767 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5768 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5769 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5770 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5771 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5772 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5773 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5774 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5775 assert(pss.queue_is_empty(), "should be"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5776 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5777 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5778 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5779 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5780 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5781 double ref_proc_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5782 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5783 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5784 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5785 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5786 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5787 // 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
|
5788 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5789 // by following an RSet entry). |
|
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 // 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
|
5792 // 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
|
5793 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5794 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5795 // but would not have treated the reference object as a regular oop. |
| 10405 | 5796 // As a result the copy closure would not have been applied to the |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5797 // referent object. |
|
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 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5800 // will be processed at the end of remarking. |
|
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 // We also need to do this copying before we process the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5803 // objects discovered by the STW ref processor in case one of these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5804 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5805 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5806 |
| 4711 | 5807 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5808 no_of_gc_workers == workers()->active_workers(), |
| 5809 "Need to reset active GC workers"); | |
| 5810 | |
| 5811 set_par_threads(no_of_gc_workers); | |
| 5812 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5813 no_of_gc_workers, | |
| 5814 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5815 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5816 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5817 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5818 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5819 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5820 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5821 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5822 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5823 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5824 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5825 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5826 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5827 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5828 // of JNI refs is serial and performed serially by the current thread |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5829 // rather than by a worker. The following PSS will be used for processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5830 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5831 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5832 // Use only a single queue for this PSS. |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5833 G1ParScanThreadState pss(this, 0, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5834 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5835 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5836 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5837 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5838 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5839 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5840 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5841 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5842 assert(pss.queue_is_empty(), "pre-condition"); |
|
3979
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 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5845 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5846 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5847 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5848 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5849 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5850 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5851 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5852 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5853 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5854 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5855 // Keep alive closure. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5856 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5857 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5858 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5859 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
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 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5862 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5863 |
| 10405 | 5864 ReferenceProcessorStats stats; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5865 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5866 // Serial reference processing... |
| 10405 | 5867 stats = rp->process_discovered_references(&is_alive, |
| 5868 &keep_alive, | |
| 5869 &drain_queue, | |
| 5870 NULL, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5871 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5872 _gc_tracer_stw->gc_id()); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5873 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5874 // Parallel reference processing |
| 6819 | 5875 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5876 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5877 | |
| 5878 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
| 10405 | 5879 stats = rp->process_discovered_references(&is_alive, |
| 5880 &keep_alive, | |
| 5881 &drain_queue, | |
| 5882 &par_task_executor, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5883 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5884 _gc_tracer_stw->gc_id()); |
| 10405 | 5885 } |
| 5886 | |
| 5887 _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
|
5888 |
|
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5889 // We have completed copying any necessary live referent objects. |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5890 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
|
5891 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5892 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
|
5893 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
|
5894 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5895 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5896 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5897 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5898 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5899 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5900 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5901 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
|
5902 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5903 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5904 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5905 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5906 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5907 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5908 } else { |
| 10405 | 5909 // Parallel reference enqueueing |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5910 |
| 6819 | 5911 assert(no_of_gc_workers == workers()->active_workers(), |
| 5912 "Need to reset active workers"); | |
| 5913 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5914 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5915 | |
| 5916 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
|
5917 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5918 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5919 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5920 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5921 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5922 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5923 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5924 // 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
|
5925 // Should we do that here also? We could, but it is a serial operation |
| 10405 | 5926 // and could significantly increase the pause time. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5927 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5928 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
|
5929 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
|
5930 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5931 |
| 10405 | 5932 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
|
5933 _expand_heap_after_alloc_failure = true; |
| 10405 | 5934 _evacuation_failed = false; |
| 342 | 5935 |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5936 // 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
|
5937 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
|
5938 |
| 342 | 5939 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
|
5940 |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5941 // Disable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5942 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
|
5943 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
|
5944 hot_card_cache->set_use_cache(false); |
| 889 | 5945 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5946 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5947 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5948 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5949 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5950 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5951 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5952 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5953 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5954 "If not dynamic should be using all the workers"); |
| 4711 | 5955 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5956 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5957 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5958 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5959 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5960 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5961 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5962 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5963 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5964 |
| 5965 init_for_evac_failure(NULL); | |
| 5966 | |
| 5967 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
|
5968 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5969 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
|
5970 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5971 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5972 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5973 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5974 StrongRootsScope srs(this); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5975 // 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
|
5976 if (g1_policy()->during_initial_mark_pause()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5977 ClassLoaderDataGraph::clear_claimed_marks(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5978 } |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5979 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5980 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5981 // 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
|
5982 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5983 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5984 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5985 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5986 "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
|
5987 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5988 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5989 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
|
5990 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5991 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5992 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5993 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5994 // 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
|
5995 // 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
|
5996 // 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
|
5997 // 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
|
5998 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5999 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6000 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6001 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
|
6002 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
|
6003 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6004 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6005 (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
|
6006 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
|
6007 |
| 342 | 6008 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
6009 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6010 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6011 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6012 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6013 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6014 // not copied during the pause. |
| 6819 | 6015 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6016 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
6017 // Weak root processing. |
| 342 | 6018 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6019 G1STWIsAliveClosure is_alive(this); |
| 342 | 6020 G1KeepAliveClosure keep_alive(this); |
| 6021 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 17764 | 6022 if (G1StringDedup::is_enabled()) { |
| 6023 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
| 6024 } | |
| 342 | 6025 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6026 |
| 10405 | 6027 release_gc_alloc_regions(n_workers, evacuation_info); |
| 342 | 6028 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
|
6029 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6030 // 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
|
6031 // 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
|
6032 // 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
|
6033 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
|
6034 hot_card_cache->set_use_cache(true); |
| 342 | 6035 |
| 12080 | 6036 // Migrate the strong code roots attached to each region in |
| 6037 // the collection set. Ideally we would like to do this | |
| 6038 // after we have finished the scanning/evacuation of the | |
| 6039 // strong code roots for a particular heap region. | |
| 6040 migrate_strong_code_roots(); | |
| 6041 | |
|
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
6042 purge_code_root_memory(); |
|
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
6043 |
| 12080 | 6044 if (g1_policy()->during_initial_mark_pause()) { |
| 6045 // Reset the claim values set during marking the strong code roots | |
| 6046 reset_heap_region_claim_values(); | |
| 6047 } | |
| 6048 | |
| 342 | 6049 finalize_for_evac_failure(); |
| 6050 | |
| 6051 if (evacuation_failed()) { | |
| 6052 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
6053 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
6054 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
6055 // 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
|
6056 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
6057 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 6058 } |
| 6059 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6060 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6061 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6062 // this after the card table is cleaned (and verified) as |
| 10405 | 6063 // the act of enqueueing entries on to the pending list |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6064 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6065 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6066 // RSets. |
| 6819 | 6067 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6068 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
6069 if (G1DeferredRSUpdate) { |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
6070 redirty_logged_cards(); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
6071 } |
| 342 | 6072 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 6073 } | |
| 6074 | |
| 2152 | 6075 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 6076 FreeRegionList* free_list, | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6077 bool par, |
|
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6078 bool locked) { |
| 2152 | 6079 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
| 6080 assert(!hr->is_empty(), "the region should not be empty"); | |
| 6081 assert(free_list != NULL, "pre-condition"); | |
| 6082 | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6083 // 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
|
6084 // 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
|
6085 // (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
|
6086 if (!hr->is_young()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6087 _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
|
6088 } |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6089 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
|
6090 free_list->add_ordered(hr); |
| 2152 | 6091 } |
| 6092 | |
| 6093 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 6094 FreeRegionList* free_list, | |
| 6095 bool par) { | |
| 6096 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 6097 assert(free_list != NULL, "pre-condition"); | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6098 |
| 2152 | 6099 size_t hr_capacity = hr->capacity(); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6100 // 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
|
6101 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6102 uint last_index = hr->last_hc_index(); |
| 2152 | 6103 hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6104 free_region(hr, free_list, par); |
| 2152 | 6105 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6106 uint i = hr->hrs_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6107 while (i < last_index) { |
| 3766 | 6108 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6109 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 6110 curr_hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6111 free_region(curr_hr, free_list, par); |
| 2152 | 6112 i += 1; |
| 6113 } | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6114 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6115 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6116 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6117 const HeapRegionSetCount& humongous_regions_removed) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6118 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6119 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6120 _old_set.bulk_remove(old_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6121 _humongous_set.bulk_remove(humongous_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6122 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6123 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6124 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6125 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6126 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6127 assert(list != NULL, "list can't be null"); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6128 if (!list->is_empty()) { |
| 2152 | 6129 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6130 _free_list.add_ordered(list); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6131 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6132 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6133 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6134 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6135 assert(_summary_bytes_used >= bytes, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6136 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
|
6137 _summary_bytes_used, bytes)); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6138 _summary_bytes_used -= bytes; |
| 342 | 6139 } |
| 6140 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6141 class G1ParCleanupCTTask : public AbstractGangTask { |
| 12343 | 6142 G1SATBCardTableModRefBS* _ct_bs; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6143 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6144 HeapRegion* volatile _su_head; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6145 public: |
| 12343 | 6146 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6147 G1CollectedHeap* g1h) : |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6148 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
|
6149 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6150 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
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|
6151 void work(uint worker_id) { |
|
796
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|
6152 HeapRegion* r; |
|
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|
6153 while (r = _g1h->pop_dirty_cards_region()) { |
|
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6819065: G1: eliminate high serial card table clearing time
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|
6154 clear_cards(r); |
|
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|
6155 } |
|
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|
6156 } |
|
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|
6157 |
|
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|
6158 void clear_cards(HeapRegion* r) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
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|
6159 // Cards of the survivors should have already been dirtied. |
|
1394
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|
6160 if (!r->is_survivor()) { |
|
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|
6161 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
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6819065: G1: eliminate high serial card table clearing time
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|
6162 } |
|
29e7d79232b9
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|
6163 } |
|
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|
6164 }; |
|
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|
6165 |
|
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|
6166 #ifndef PRODUCT |
|
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|
6167 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
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|
6168 G1CollectedHeap* _g1h; |
| 12343 | 6169 G1SATBCardTableModRefBS* _ct_bs; |
|
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|
6170 public: |
| 12343 | 6171 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, G1SATBCardTableModRefBS* ct_bs) |
|
3317
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|
6172 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
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|
6173 virtual bool doHeapRegion(HeapRegion* r) { |
|
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|
6174 if (r->is_survivor()) { |
|
3317
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|
6175 _g1h->verify_dirty_region(r); |
|
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|
6176 } else { |
|
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|
6177 _g1h->verify_not_dirty_region(r); |
|
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|
6178 } |
|
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|
6179 return false; |
|
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|
6180 } |
|
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|
6181 }; |
|
2433
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|
6182 |
|
3317
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|
6183 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
|
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|
6184 // All of the region should be clean. |
| 12343 | 6185 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
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|
6186 MemRegion mr(hr->bottom(), hr->end()); |
|
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|
6187 ct_bs->verify_not_dirty_region(mr); |
|
063382f9b575
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|
6188 } |
|
063382f9b575
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|
6189 |
|
063382f9b575
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|
6190 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
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|
6191 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
|
063382f9b575
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|
6192 // dirty allocated blocks as they allocate them. The thread that |
|
063382f9b575
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|
6193 // retires each region and replaces it with a new one will do a |
|
063382f9b575
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|
6194 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
|
063382f9b575
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|
6195 // not dirty that area (one less thing to have to do while holding |
|
063382f9b575
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|
6196 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
|
063382f9b575
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changeset
|
6197 // is dirty. |
| 12343 | 6198 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
3317
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|
6199 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
|
12835
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
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diff
changeset
|
6200 if (hr->is_young()) { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
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diff
changeset
|
6201 ct_bs->verify_g1_young_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
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diff
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|
6202 } else { |
|
69944b868a32
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mgerdin
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diff
changeset
|
6203 ct_bs->verify_dirty_region(mr); |
|
69944b868a32
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mgerdin
parents:
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diff
changeset
|
6204 } |
|
3317
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|
6205 } |
|
063382f9b575
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changeset
|
6206 |
|
2433
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|
6207 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
| 12343 | 6208 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
2433
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|
6209 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
|
3317
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7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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changeset
|
6210 verify_dirty_region(hr); |
|
2433
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|
6211 } |
|
abdfc822206f
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tonyp
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diff
changeset
|
6212 } |
|
abdfc822206f
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tonyp
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diff
changeset
|
6213 |
|
abdfc822206f
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diff
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|
6214 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
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|
6215 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
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|
6216 } |
|
940
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|
6217 #endif |
|
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|
6218 |
| 342 | 6219 void G1CollectedHeap::cleanUpCardTable() { |
| 12343 | 6220 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 6221 double start = os::elapsedTime(); |
| 6222 | |
| 4023 | 6223 { |
| 6224 // Iterate over the dirty cards region list. | |
| 6225 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 6226 | |
| 4711 | 6227 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 6228 set_par_threads(); | |
| 4023 | 6229 workers()->run_task(&cleanup_task); |
| 6230 set_par_threads(0); | |
| 6231 } else { | |
| 6232 while (_dirty_cards_region_list) { | |
| 6233 HeapRegion* r = _dirty_cards_region_list; | |
| 6234 cleanup_task.clear_cards(r); | |
| 6235 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 6236 if (_dirty_cards_region_list == r) { | |
| 6237 // The last region. | |
| 6238 _dirty_cards_region_list = NULL; | |
| 6239 } | |
| 6240 r->set_next_dirty_cards_region(NULL); | |
|
796
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|
6241 } |
|
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diff
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|
6242 } |
| 4023 | 6243 #ifndef PRODUCT |
| 6244 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 6245 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 6246 heap_region_iterate(&cleanup_verifier); | |
| 6247 } | |
| 6248 #endif | |
|
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|
6249 } |
|
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|
6250 |
| 342 | 6251 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
|
6252 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 6253 } |
| 6254 | |
| 10405 | 6255 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
| 2152 | 6256 size_t pre_used = 0; |
| 6257 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 6258 | |
| 342 | 6259 double young_time_ms = 0.0; |
| 6260 double non_young_time_ms = 0.0; | |
| 6261 | |
|
1394
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diff
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|
6262 // Since the collection set is a superset of the the young list, |
|
1316cec51b4d
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|
6263 // all we need to do to clear the young list is clear its |
|
1316cec51b4d
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diff
changeset
|
6264 // head and length, and unlink any young regions in the code below |
|
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|
6265 _young_list->clear(); |
|
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diff
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|
6266 |
| 342 | 6267 G1CollectorPolicy* policy = g1_policy(); |
| 6268 | |
| 6269 double start_sec = os::elapsedTime(); | |
| 6270 bool non_young = true; | |
| 6271 | |
| 6272 HeapRegion* cur = cs_head; | |
| 6273 int age_bound = -1; | |
| 6274 size_t rs_lengths = 0; | |
| 6275 | |
| 6276 while (cur != NULL) { | |
| 2361 | 6277 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 6278 if (non_young) { |
| 6279 if (cur->is_young()) { | |
| 6280 double end_sec = os::elapsedTime(); | |
| 6281 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 6282 non_young_time_ms += elapsed_ms; | |
| 6283 | |
| 6284 start_sec = os::elapsedTime(); | |
| 6285 non_young = false; | |
| 6286 } | |
| 6287 } else { | |
|
4097
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|
6288 if (!cur->is_young()) { |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
6289 double end_sec = os::elapsedTime(); |
|
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|
6290 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
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|
6291 young_time_ms += elapsed_ms; |
|
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4095
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|
6292 |
|
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|
6293 start_sec = os::elapsedTime(); |
|
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|
6294 non_young = true; |
|
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|
6295 } |
| 342 | 6296 } |
| 6297 | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6298 rs_lengths += cur->rem_set()->occupied_locked(); |
| 342 | 6299 |
| 6300 HeapRegion* next = cur->next_in_collection_set(); | |
| 6301 assert(cur->in_collection_set(), "bad CS"); | |
| 6302 cur->set_next_in_collection_set(NULL); | |
| 6303 cur->set_in_collection_set(false); | |
| 6304 | |
| 6305 if (cur->is_young()) { | |
| 6306 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
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4073
diff
changeset
|
6307 assert(index != -1, "invariant"); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6308 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 6309 size_t words_survived = _surviving_young_words[index]; |
| 6310 cur->record_surv_words_in_group(words_survived); | |
|
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|
6311 |
|
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changeset
|
6312 // At this point the we have 'popped' cur from the collection set |
|
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|
6313 // (linked via next_in_collection_set()) but it is still in the |
|
1316cec51b4d
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changeset
|
6314 // young list (linked via next_young_region()). Clear the |
|
1316cec51b4d
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|
6315 // _next_young_region field. |
|
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changeset
|
6316 cur->set_next_young_region(NULL); |
| 342 | 6317 } else { |
| 6318 int index = cur->young_index_in_cset(); | |
|
4090
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tonyp
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changeset
|
6319 assert(index == -1, "invariant"); |
| 342 | 6320 } |
| 6321 | |
| 6322 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 6323 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 6324 "invariant" ); | |
| 6325 | |
| 6326 if (!cur->evacuation_failed()) { | |
|
4097
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changeset
|
6327 MemRegion used_mr = cur->used_region(); |
|
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changeset
|
6328 |
| 342 | 6329 // And the region is empty. |
|
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4095
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changeset
|
6330 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6331 pre_used += cur->used(); |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6332 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
| 342 | 6333 } else { |
| 6334 cur->uninstall_surv_rate_group(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4073
diff
changeset
|
6335 if (cur->is_young()) { |
| 342 | 6336 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
|
6337 } |
| 342 | 6338 cur->set_not_young(); |
| 6339 cur->set_evacuation_failed(false); | |
| 4072 | 6340 // The region is now considered to be old. |
| 6341 _old_set.add(cur); | |
| 10405 | 6342 evacuation_info.increment_collectionset_used_after(cur->used()); |
| 342 | 6343 } |
| 6344 cur = next; | |
| 6345 } | |
| 6346 | |
| 10405 | 6347 evacuation_info.set_regions_freed(local_free_list.length()); |
| 342 | 6348 policy->record_max_rs_lengths(rs_lengths); |
| 6349 policy->cset_regions_freed(); | |
| 6350 | |
| 6351 double end_sec = os::elapsedTime(); | |
| 6352 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
|
6353 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6354 if (non_young) { |
| 342 | 6355 non_young_time_ms += elapsed_ms; |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6356 } else { |
| 342 | 6357 young_time_ms += elapsed_ms; |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6358 } |
| 342 | 6359 |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6360 prepend_to_freelist(&local_free_list); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6361 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
|
6362 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
|
6363 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6364 } |
| 6365 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6366 // 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
|
6367 // 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
|
6368 // 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
|
6369 // 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
|
6370 // 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
|
6371 // 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
|
6372 // 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
|
6373 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6374 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
|
6375 HeapRegion* cur = cs_head; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6376 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6377 while (cur != NULL) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6378 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
|
6379 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
|
6380 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
|
6381 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
|
6382 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
|
6383 cur = next; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6384 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6385 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6386 |
| 2152 | 6387 void G1CollectedHeap::set_free_regions_coming() { |
| 6388 if (G1ConcRegionFreeingVerbose) { | |
| 6389 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6390 "setting free regions coming"); | |
| 6391 } | |
| 6392 | |
| 6393 assert(!free_regions_coming(), "pre-condition"); | |
| 6394 _free_regions_coming = true; | |
| 342 | 6395 } |
| 6396 | |
| 2152 | 6397 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6398 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6399 |
| 2152 | 6400 { |
| 6401 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6402 _free_regions_coming = false; | |
| 6403 SecondaryFreeList_lock->notify_all(); | |
| 6404 } | |
| 6405 | |
| 6406 if (G1ConcRegionFreeingVerbose) { | |
| 6407 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6408 "reset free regions coming"); | |
| 342 | 6409 } |
| 6410 } | |
| 6411 | |
| 2152 | 6412 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6413 // Most of the time we won't have to wait, so let's do a quick test | |
| 6414 // first before we take the lock. | |
| 6415 if (!free_regions_coming()) { | |
| 6416 return; | |
| 6417 } | |
| 6418 | |
| 6419 if (G1ConcRegionFreeingVerbose) { | |
| 6420 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6421 "waiting for free regions"); | |
| 342 | 6422 } |
| 6423 | |
| 6424 { | |
| 2152 | 6425 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6426 while (free_regions_coming()) { | |
| 6427 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6428 } |
| 2152 | 6429 } |
| 6430 | |
| 6431 if (G1ConcRegionFreeingVerbose) { | |
| 6432 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6433 "done waiting for free regions"); | |
| 6434 } | |
| 342 | 6435 } |
| 6436 | |
| 6437 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6438 assert(heap_lock_held_for_gc(), | |
| 6439 "the heap lock should already be held by or for this thread"); | |
| 6440 _young_list->push_region(hr); | |
| 6441 } | |
| 6442 | |
| 6443 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6444 private: | |
| 6445 bool _success; | |
| 6446 public: | |
| 6447 NoYoungRegionsClosure() : _success(true) { } | |
| 6448 bool doHeapRegion(HeapRegion* r) { | |
| 6449 if (r->is_young()) { | |
| 6450 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6451 r->bottom(), r->end()); | |
| 6452 _success = false; | |
| 6453 } | |
| 6454 return false; | |
| 6455 } | |
| 6456 bool success() { return _success; } | |
| 6457 }; | |
| 6458 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6459 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
|
6460 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
|
6461 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6462 if (check_heap) { |
| 342 | 6463 NoYoungRegionsClosure closure; |
| 6464 heap_region_iterate(&closure); | |
| 6465 ret = ret && closure.success(); | |
| 6466 } | |
| 6467 | |
| 6468 return ret; | |
| 6469 } | |
| 6470 | |
| 4072 | 6471 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6472 private: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6473 HeapRegionSet *_old_set; |
| 2152 | 6474 |
| 342 | 6475 public: |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6476 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6477 |
| 342 | 6478 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6479 if (r->is_empty()) { |
| 6480 // We ignore empty regions, we'll empty the free list afterwards | |
| 6481 } else if (r->is_young()) { | |
| 6482 // We ignore young regions, we'll empty the young list afterwards | |
| 6483 } else if (r->isHumongous()) { | |
| 6484 // We ignore humongous regions, we're not tearing down the | |
| 6485 // humongous region set | |
| 342 | 6486 } else { |
| 4072 | 6487 // The rest should be old |
| 6488 _old_set->remove(r); | |
| 342 | 6489 } |
| 6490 return false; | |
| 6491 } | |
| 6492 | |
| 4072 | 6493 ~TearDownRegionSetsClosure() { |
| 6494 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6495 } |
| 342 | 6496 }; |
| 6497 | |
| 4072 | 6498 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6499 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6500 | |
| 6501 if (!free_list_only) { | |
| 6502 TearDownRegionSetsClosure cl(&_old_set); | |
| 6503 heap_region_iterate(&cl); | |
| 6504 | |
| 17764 | 6505 // Note that emptying the _young_list is postponed and instead done as |
| 6506 // the first step when rebuilding the regions sets again. The reason for | |
| 6507 // this is that during a full GC string deduplication needs to know if | |
| 6508 // a collected region was young or old when the full GC was initiated. | |
| 4072 | 6509 } |
| 6510 _free_list.remove_all(); | |
| 6511 } | |
| 6512 | |
| 6513 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6514 private: | |
| 6515 bool _free_list_only; | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6516 HeapRegionSet* _old_set; |
| 4072 | 6517 FreeRegionList* _free_list; |
| 6518 size_t _total_used; | |
| 6519 | |
| 6520 public: | |
| 6521 RebuildRegionSetsClosure(bool free_list_only, | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6522 HeapRegionSet* old_set, FreeRegionList* free_list) : |
| 4072 | 6523 _free_list_only(free_list_only), |
| 6524 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 6525 assert(_free_list->is_empty(), "pre-condition"); | |
| 6526 if (!free_list_only) { | |
| 6527 assert(_old_set->is_empty(), "pre-condition"); | |
| 6528 } | |
| 6529 } | |
| 6530 | |
| 6531 bool doHeapRegion(HeapRegion* r) { | |
| 6532 if (r->continuesHumongous()) { | |
| 6533 return false; | |
| 6534 } | |
| 6535 | |
| 6536 if (r->is_empty()) { | |
| 6537 // Add free regions to the free list | |
| 6538 _free_list->add_as_tail(r); | |
| 6539 } else if (!_free_list_only) { | |
| 6540 assert(!r->is_young(), "we should not come across young regions"); | |
| 6541 | |
| 6542 if (r->isHumongous()) { | |
| 6543 // We ignore humongous regions, we left the humongous set unchanged | |
| 6544 } else { | |
| 6545 // The rest should be old, add them to the old set | |
| 6546 _old_set->add(r); | |
| 6547 } | |
| 6548 _total_used += r->used(); | |
| 6549 } | |
| 6550 | |
| 6551 return false; | |
| 6552 } | |
| 6553 | |
| 6554 size_t total_used() { | |
| 6555 return _total_used; | |
| 6556 } | |
| 6557 }; | |
| 6558 | |
| 6559 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6560 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6561 | |
| 17764 | 6562 if (!free_list_only) { |
| 6563 _young_list->empty_list(); | |
| 6564 } | |
| 6565 | |
| 4072 | 6566 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); |
| 6567 heap_region_iterate(&cl); | |
| 6568 | |
| 6569 if (!free_list_only) { | |
| 6570 _summary_bytes_used = cl.total_used(); | |
| 6571 } | |
| 6572 assert(_summary_bytes_used == recalculate_used(), | |
| 6573 err_msg("inconsistent _summary_bytes_used, " | |
| 6574 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 6575 _summary_bytes_used, recalculate_used())); | |
| 342 | 6576 } |
| 6577 | |
| 6578 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6579 _refine_cte_cl->set_concurrent(concurrent); | |
| 6580 } | |
| 6581 | |
| 6582 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6583 HeapRegion* hr = heap_region_containing(p); | |
| 6584 if (hr == NULL) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
6585 return false; |
| 342 | 6586 } else { |
| 6587 return hr->is_in(p); | |
| 6588 } | |
| 6589 } | |
| 2152 | 6590 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6591 // 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
|
6592 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6593 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
|
6594 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6595 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
|
6596 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6597 "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
|
6598 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
|
6599 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6600 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
|
6601 false /* is_old */, |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6602 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6603 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6604 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6605 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6606 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6607 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6608 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6609 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6610 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6611 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6612 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
|
6613 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6614 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
|
6615 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
|
6616 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6617 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
|
6618 _summary_bytes_used += allocated_bytes; |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6619 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6620 // 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
|
6621 // 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
|
6622 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6623 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6624 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6625 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6626 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
|
6627 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6628 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
|
6629 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6630 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6631 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6632 // 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
|
6633 // in the workgroup. |
| 4711 | 6634 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
|
6635 uint n_workers = workers()->active_workers(); |
| 4711 | 6636 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6637 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6638 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6639 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6640 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
|
6641 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6642 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6643 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6644 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6645 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6646 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6647 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6648 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6649 _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
|
6650 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6651 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6652 // 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
|
6653 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6654 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
|
6655 uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6656 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6657 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
|
6658 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6659 if (count < g1_policy()->max_regions(ap)) { |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6660 bool survivor = (ap == GCAllocForSurvived); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6661 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
|
6662 !survivor, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6663 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6664 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6665 // 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
|
6666 // 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
|
6667 // for survivors too. |
|
20274
a8137787acfe
8047821: G1 Does not use the save_marks functionality as intended
mgerdin
parents:
20270
diff
changeset
|
6668 new_alloc_region->record_top_and_timestamp(); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6669 if (survivor) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6670 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6671 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6672 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6673 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6674 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6675 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
|
6676 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
|
6677 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6678 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6679 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
|
6680 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6681 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6682 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6683 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6684 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6685 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
|
6686 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6687 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6688 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
|
6689 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
|
6690 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
|
6691 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6692 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6693 } else { |
| 6694 _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
|
6695 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6696 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6697 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6698 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6699 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
|
6700 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6701 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
|
6702 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
|
6703 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6704 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6705 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
|
6706 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6707 _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
|
6708 GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6709 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6710 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6711 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
|
6712 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6713 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
|
6714 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
|
6715 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6716 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6717 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
|
6718 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6719 _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
|
6720 GCAllocForTenured); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6721 } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6722 // Heap region set verification |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6723 |
| 2152 | 6724 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6725 private: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6726 HeapRegionSet* _old_set; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6727 HeapRegionSet* _humongous_set; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6728 FreeRegionList* _free_list; |
| 2152 | 6729 |
| 6730 public: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6731 HeapRegionSetCount _old_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6732 HeapRegionSetCount _humongous_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6733 HeapRegionSetCount _free_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6734 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
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6735 VerifyRegionListsClosure(HeapRegionSet* old_set, |
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6736 HeapRegionSet* humongous_set, |
| 2152 | 6737 FreeRegionList* free_list) : |
|
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6738 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
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6739 _old_count(), _humongous_count(), _free_count(){ } |
| 2152 | 6740 |
| 6741 bool doHeapRegion(HeapRegion* hr) { | |
| 6742 if (hr->continuesHumongous()) { | |
| 6743 return false; | |
| 6744 } | |
| 6745 | |
| 6746 if (hr->is_young()) { | |
| 6747 // TODO | |
| 6748 } else if (hr->startsHumongous()) { | |
|
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6749 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->region_num())); |
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6750 _humongous_count.increment(1u, hr->capacity()); |
| 2152 | 6751 } else if (hr->is_empty()) { |
|
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6752 assert(hr->containing_set() == _free_list, err_msg("Heap region %u is empty but not on the free list.", hr->region_num())); |
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6753 _free_count.increment(1u, hr->capacity()); |
| 4072 | 6754 } else { |
|
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|
6755 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->region_num())); |
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6756 _old_count.increment(1u, hr->capacity()); |
| 2152 | 6757 } |
| 6758 return false; | |
| 6759 } | |
|
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6760 |
|
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6761 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
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6762 guarantee(old_set->length() == _old_count.length(), err_msg("Old set count mismatch. Expected %u, actual %u.", old_set->length(), _old_count.length())); |
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6763 guarantee(old_set->total_capacity_bytes() == _old_count.capacity(), err_msg("Old set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
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|
6764 old_set->total_capacity_bytes(), _old_count.capacity())); |
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6765 |
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6766 guarantee(humongous_set->length() == _humongous_count.length(), err_msg("Hum set count mismatch. Expected %u, actual %u.", humongous_set->length(), _humongous_count.length())); |
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|
6767 guarantee(humongous_set->total_capacity_bytes() == _humongous_count.capacity(), err_msg("Hum set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
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6768 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
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6769 |
|
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|
6770 guarantee(free_list->length() == _free_count.length(), err_msg("Free list count mismatch. Expected %u, actual %u.", free_list->length(), _free_count.length())); |
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|
6771 guarantee(free_list->total_capacity_bytes() == _free_count.capacity(), err_msg("Free list capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
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6772 free_list->total_capacity_bytes(), _free_count.capacity())); |
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|
6773 } |
| 2152 | 6774 }; |
| 6775 | |
|
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|
6776 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
| 3766 | 6777 HeapWord* bottom) { |
| 6778 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6779 MemRegion mr(bottom, end); | |
| 6780 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6781 // This might return NULL if the allocation fails | |
|
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|
6782 return new HeapRegion(hrs_index, _bot_shared, mr); |
| 3766 | 6783 } |
| 6784 | |
| 2152 | 6785 void G1CollectedHeap::verify_region_sets() { |
| 6786 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6787 | |
| 6788 // First, check the explicit lists. | |
|
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|
6789 _free_list.verify_list(); |
| 2152 | 6790 { |
| 6791 // Given that a concurrent operation might be adding regions to | |
| 6792 // the secondary free list we have to take the lock before | |
| 6793 // verifying it. | |
| 6794 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
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|
6795 _secondary_free_list.verify_list(); |
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6796 } |
| 2152 | 6797 |
| 6798 // If a concurrent region freeing operation is in progress it will | |
| 6799 // be difficult to correctly attributed any free regions we come | |
| 6800 // across to the correct free list given that they might belong to | |
| 6801 // one of several (free_list, secondary_free_list, any local lists, | |
| 6802 // etc.). So, if that's the case we will skip the rest of the | |
| 6803 // verification operation. Alternatively, waiting for the concurrent | |
| 6804 // operation to complete will have a non-trivial effect on the GC's | |
| 6805 // operation (no concurrent operation will last longer than the | |
| 6806 // interval between two calls to verification) and it might hide | |
| 6807 // any issues that we would like to catch during testing. | |
| 6808 if (free_regions_coming()) { | |
| 6809 return; | |
| 6810 } | |
| 6811 | |
| 2361 | 6812 // Make sure we append the secondary_free_list on the free_list so |
| 6813 // that all free regions we will come across can be safely | |
| 6814 // attributed to the free_list. | |
| 6815 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6816 |
| 6817 // Finally, make sure that the region accounting in the lists is | |
| 6818 // consistent with what we see in the heap. | |
| 6819 | |
| 4072 | 6820 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6821 heap_region_iterate(&cl); |
|
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|
6822 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
| 342 | 6823 } |
| 12080 | 6824 |
| 6825 // Optimized nmethod scanning | |
| 6826 | |
| 6827 class RegisterNMethodOopClosure: public OopClosure { | |
| 6828 G1CollectedHeap* _g1h; | |
| 6829 nmethod* _nm; | |
| 6830 | |
| 6831 template <class T> void do_oop_work(T* p) { | |
| 6832 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6833 if (!oopDesc::is_null(heap_oop)) { | |
| 6834 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6835 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
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|
6836 assert(!hr->continuesHumongous(), |
|
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|
6837 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
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|
6838 " starting at "HR_FORMAT, |
|
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|
6839 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
| 12080 | 6840 |
| 6841 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
| 6842 // entries but having duplicates is OK since we "mark" nmethods | |
| 6843 // as visited when we scan the strong code root lists during the GC. | |
| 6844 hr->add_strong_code_root(_nm); | |
|
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|
6845 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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|
6846 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
|
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|
6847 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6848 } |
| 6849 } | |
| 6850 | |
| 6851 public: | |
| 6852 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6853 _g1h(g1h), _nm(nm) {} | |
| 6854 | |
| 6855 void do_oop(oop* p) { do_oop_work(p); } | |
| 6856 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6857 }; | |
| 6858 | |
| 6859 class UnregisterNMethodOopClosure: public OopClosure { | |
| 6860 G1CollectedHeap* _g1h; | |
| 6861 nmethod* _nm; | |
| 6862 | |
| 6863 template <class T> void do_oop_work(T* p) { | |
| 6864 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6865 if (!oopDesc::is_null(heap_oop)) { | |
| 6866 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6867 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
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|
6868 assert(!hr->continuesHumongous(), |
|
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|
6869 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
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|
6870 " starting at "HR_FORMAT, |
|
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|
6871 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
|
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|
6872 |
| 12080 | 6873 hr->remove_strong_code_root(_nm); |
|
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|
6874 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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|
6875 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
|
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|
6876 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6877 } |
| 6878 } | |
| 6879 | |
| 6880 public: | |
| 6881 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6882 _g1h(g1h), _nm(nm) {} | |
| 6883 | |
| 6884 void do_oop(oop* p) { do_oop_work(p); } | |
| 6885 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6886 }; | |
| 6887 | |
| 6888 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
| 6889 CollectedHeap::register_nmethod(nm); | |
| 6890 | |
| 6891 guarantee(nm != NULL, "sanity"); | |
| 6892 RegisterNMethodOopClosure reg_cl(this, nm); | |
| 6893 nm->oops_do(®_cl); | |
| 6894 } | |
| 6895 | |
| 6896 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
| 6897 CollectedHeap::unregister_nmethod(nm); | |
| 6898 | |
| 6899 guarantee(nm != NULL, "sanity"); | |
| 6900 UnregisterNMethodOopClosure reg_cl(this, nm); | |
| 6901 nm->oops_do(®_cl, true); | |
| 6902 } | |
| 6903 | |
| 6904 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
| 6905 public: | |
| 6906 bool doHeapRegion(HeapRegion *hr) { | |
|
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|
6907 assert(!hr->isHumongous(), |
|
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|
6908 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
|
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|
6909 HR_FORMAT_PARAMS(hr))); |
| 12080 | 6910 hr->migrate_strong_code_roots(); |
| 6911 return false; | |
| 6912 } | |
| 6913 }; | |
| 6914 | |
| 6915 void G1CollectedHeap::migrate_strong_code_roots() { | |
| 6916 MigrateCodeRootsHeapRegionClosure cl; | |
| 6917 double migrate_start = os::elapsedTime(); | |
| 6918 collection_set_iterate(&cl); | |
| 6919 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
| 6920 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
| 6921 } | |
| 6922 | |
|
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|
6923 void G1CollectedHeap::purge_code_root_memory() { |
|
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changeset
|
6924 double purge_start = os::elapsedTime(); |
|
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changeset
|
6925 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
|
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|
6926 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
|
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changeset
|
6927 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
|
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changeset
|
6928 } |
|
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changeset
|
6929 |
| 12080 | 6930 class RebuildStrongCodeRootClosure: public CodeBlobClosure { |
| 6931 G1CollectedHeap* _g1h; | |
| 6932 | |
| 6933 public: | |
| 6934 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
| 6935 _g1h(g1h) {} | |
| 6936 | |
| 6937 void do_code_blob(CodeBlob* cb) { | |
| 6938 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
| 6939 if (nm == NULL) { | |
| 6940 return; | |
| 6941 } | |
| 6942 | |
|
20191
fd81a5764900
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parents:
20190
diff
changeset
|
6943 if (ScavengeRootsInCode) { |
| 12080 | 6944 _g1h->register_nmethod(nm); |
| 6945 } | |
| 6946 } | |
| 6947 }; | |
| 6948 | |
| 6949 void G1CollectedHeap::rebuild_strong_code_roots() { | |
| 6950 RebuildStrongCodeRootClosure blob_cl(this); | |
| 6951 CodeCache::blobs_do(&blob_cl); | |
| 6952 } |