Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20218:828056cf311f
8040792: G1: Memory usage calculation uses sizeof(this) instead of sizeof(classname)
Summary: A few locations in the code use sizeof(this) which returns the size of the pointer instead of sizeof(classname) which returns the size of the sum of its members. This change fixes these errors and adds a few tests.
Reviewed-by: mgerdin, brutisso
| author | tschatzl |
|---|---|
| date | Mon, 21 Jul 2014 09:40:19 +0200 |
| parents | 6b52700a896b |
| children | b0c374311c4e |
| 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" | |
| 45 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
| 17764 | 46 #include "gc_implementation/g1/g1StringDedup.hpp" |
| 10405 | 47 #include "gc_implementation/g1/g1YCTypes.hpp" |
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48 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 49 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
| 50 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 51 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
| 10405 | 52 #include "gc_implementation/shared/gcHeapSummary.hpp" |
| 53 #include "gc_implementation/shared/gcTimer.hpp" | |
| 54 #include "gc_implementation/shared/gcTrace.hpp" | |
| 55 #include "gc_implementation/shared/gcTraceTime.hpp" | |
| 1972 | 56 #include "gc_implementation/shared/isGCActiveMark.hpp" |
| 57 #include "memory/gcLocker.inline.hpp" | |
| 58 #include "memory/generationSpec.hpp" | |
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59 #include "memory/iterator.hpp" |
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60 #include "memory/referenceProcessor.hpp" |
| 1972 | 61 #include "oops/oop.inline.hpp" |
| 62 #include "oops/oop.pcgc.inline.hpp" | |
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63 #include "runtime/prefetch.inline.hpp" |
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64 #include "runtime/orderAccess.inline.hpp" |
| 1972 | 65 #include "runtime/vmThread.hpp" |
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66 #include "utilities/ticks.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_strong_roots() -> |
| 10405 | 92 // SharedHeap::process_strong_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_strong_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 |
|
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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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diff
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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diff
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|
918 // return NULL. |
|
abdfc822206f
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|
919 HeapWord* result = NULL; |
|
abdfc822206f
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changeset
|
920 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
abdfc822206f
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changeset
|
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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changeset
|
928 false /* bot_updates */); |
|
abdfc822206f
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diff
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|
929 if (result != NULL) { |
|
abdfc822206f
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|
930 return result; |
|
abdfc822206f
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parents:
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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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changeset
|
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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changeset
|
937 if (GC_locker::is_active_and_needs_gc()) { |
|
abdfc822206f
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changeset
|
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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parents:
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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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parents:
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changeset
|
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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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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parents:
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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
johnc
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
parents:
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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:
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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
7023069: G1: Introduce symmetric locking in the slow allocation path
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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
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
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:
2432
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
changeset
|
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
parents:
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
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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
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parents:
2432
diff
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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
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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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|
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), |
|
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|
3317 _failures(false) {} |
|
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|
3318 |
|
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|
3319 bool failures() { |
|
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|
3320 return _failures; |
|
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|
3321 } |
|
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|
3322 |
| 342 | 3323 bool doHeapRegion(HeapRegion* r) { |
|
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|
3324 if (!r->continuesHumongous()) { |
|
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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); |
|
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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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|
3336 "< calculated "SIZE_FORMAT, |
|
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|
3337 r->bottom(), r->end(), |
|
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|
3338 r->max_live_bytes(), |
|
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|
3339 not_dead_yet_cl.live_bytes()); |
|
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|
3340 _failures = true; |
|
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|
3341 } |
|
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|
3342 } else { |
|
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|
3343 // When vo == UseNextMarking we cannot currently do a sanity |
|
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|
3344 // check on the live bytes as the calculation has not been |
|
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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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|
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), |
|
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|
3368 _vo(vo), |
|
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|
3369 _failures(false) { } |
|
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|
3370 |
|
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|
3371 bool failures() { |
|
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|
3372 return _failures; |
|
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|
3373 } |
| 390 | 3374 |
|
4728
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|
3375 void work(uint worker_id) { |
|
637
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|
3376 HandleMark hm; |
| 6008 | 3377 VerifyRegionClosure blk(true, _vo); |
|
4728
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|
3378 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
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|
3379 _g1h->workers()->active_workers(), |
| 390 | 3380 HeapRegion::ParVerifyClaimValue); |
|
1020
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|
3381 if (blk.failures()) { |
|
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|
3382 _failures = true; |
|
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|
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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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
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|
3392 if (!silent) { gclog_or_tty->print("Roots "); } |
|
3772
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|
3393 VerifyRootsClosure rootsCl(vo); |
| 12080 | 3394 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
| 3395 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); | |
|
6725
da91efe96a93
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|
3396 VerifyKlassClosure klassCl(this, &rootsCl); |
|
3772
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|
3397 |
|
3293
1f4413413144
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changeset
|
3398 // We apply the relevant closures to all the oops in the |
|
1f4413413144
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diff
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|
3399 // system dictionary, the string table and the code cache. |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
3400 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
|
3772
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|
3401 |
|
6725
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|
3402 // Need cleared claim bits for the strong roots processing |
|
da91efe96a93
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|
3403 ClassLoaderDataGraph::clear_claimed_marks(); |
|
da91efe96a93
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|
3404 |
|
3293
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diff
changeset
|
3405 process_strong_roots(true, // activate StrongRootsScope |
|
6725
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|
3406 false, // we set "is scavenging" to false, |
|
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|
3407 // so we don't reset the dirty cards. |
|
4910
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changeset
|
3408 ScanningOption(so), // roots scanning options |
| 342 | 3409 &rootsCl, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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890
diff
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|
3410 &blobsCl, |
|
6725
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|
3411 &klassCl |
|
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|
3412 ); |
|
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|
3413 |
| 12080 | 3414 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
|
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|
3415 |
|
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changeset
|
3416 if (vo != VerifyOption_G1UseMarkWord) { |
|
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|
3417 // If we're verifying during a full GC then the region sets |
|
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|
3418 // will have been torn down at the start of the GC. Therefore |
|
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|
3419 // verifying the region sets will fail. So we only verify |
|
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|
3420 // the region sets when not in a full GC. |
|
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|
3421 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
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3766
diff
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|
3422 verify_region_sets(); |
|
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3766
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|
3423 } |
|
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|
3424 |
| 2152 | 3425 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3426 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3427 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3428 "sanity check"); | |
| 3429 | |
| 6008 | 3430 G1ParVerifyTask task(this, vo); |
|
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|
3431 assert(UseDynamicNumberOfGCThreads || |
|
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|
3432 workers()->active_workers() == workers()->total_workers(), |
|
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|
3433 "If not dynamic should be using all the workers"); |
|
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|
3434 int n_workers = workers()->active_workers(); |
| 390 | 3435 set_par_threads(n_workers); |
| 3436 workers()->run_task(&task); | |
| 3437 set_par_threads(0); | |
|
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|
3438 if (task.failures()) { |
|
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|
3439 failures = true; |
|
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|
3440 } |
| 390 | 3441 |
|
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|
3442 // Checks that the expected amount of parallel work was done. |
|
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|
3443 // The implication is that n_workers is > 0. |
| 390 | 3444 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3445 "sanity check"); | |
| 3446 | |
| 3447 reset_heap_region_claim_values(); | |
| 3448 | |
| 3449 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3450 "sanity check"); | |
| 3451 } else { | |
| 6008 | 3452 VerifyRegionClosure blk(false, vo); |
| 3766 | 3453 heap_region_iterate(&blk); |
|
1020
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|
3454 if (blk.failures()) { |
|
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changeset
|
3455 failures = true; |
|
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changeset
|
3456 } |
| 390 | 3457 } |
| 2152 | 3458 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3459 rem_set()->verify(); |
|
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|
3460 |
| 17764 | 3461 if (G1StringDedup::is_enabled()) { |
| 3462 if (!silent) gclog_or_tty->print("StrDedup "); | |
| 3463 G1StringDedup::verify(); | |
| 3464 } | |
| 3465 | |
|
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|
3466 if (failures) { |
|
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changeset
|
3467 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3468 // It helps to have the per-region information in the output to |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3469 // help us track down what went wrong. This is why we call |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
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diff
changeset
|
3470 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
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diff
changeset
|
3471 print_extended_on(gclog_or_tty); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3472 gclog_or_tty->cr(); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3473 #ifndef PRODUCT |
| 1044 | 3474 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3475 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3476 vo, false /* all */); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3477 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3478 #endif |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3479 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3480 } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3481 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3482 } else { |
| 17764 | 3483 if (!silent) { |
| 3484 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
| 3485 if (G1StringDedup::is_enabled()) { | |
| 3486 gclog_or_tty->print(", StrDedup"); | |
| 3487 } | |
| 3488 gclog_or_tty->print(") "); | |
| 3489 } | |
| 342 | 3490 } |
| 3491 } | |
| 3492 | |
| 12080 | 3493 void G1CollectedHeap::verify(bool silent) { |
| 3494 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3495 } | |
| 3496 | |
| 3497 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
| 3498 double verify_time_ms = 0.0; | |
| 3499 | |
| 3500 if (guard && total_collections() >= VerifyGCStartAt) { | |
| 3501 double verify_start = os::elapsedTime(); | |
| 3502 HandleMark hm; // Discard invalid handles created during verification | |
| 3503 prepare_for_verify(); | |
| 3504 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
| 3505 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
| 3506 } | |
| 3507 | |
| 3508 return verify_time_ms; | |
| 3509 } | |
| 3510 | |
| 3511 void G1CollectedHeap::verify_before_gc() { | |
| 3512 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
| 3513 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
| 3514 } | |
| 3515 | |
| 3516 void G1CollectedHeap::verify_after_gc() { | |
| 3517 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
| 3518 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
| 3519 } | |
| 3520 | |
| 342 | 3521 class PrintRegionClosure: public HeapRegionClosure { |
| 3522 outputStream* _st; | |
| 3523 public: | |
| 3524 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3525 bool doHeapRegion(HeapRegion* r) { | |
| 3526 r->print_on(_st); | |
| 3527 return false; | |
| 3528 } | |
| 3529 }; | |
| 3530 | |
|
17833
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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parents:
17774
diff
changeset
|
3531 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3532 const HeapRegion* hr, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3533 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3534 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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17774
diff
changeset
|
3535 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3536 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3537 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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parents:
17774
diff
changeset
|
3538 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3539 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3540 return false; // keep some compilers happy |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3541 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3542 |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3543 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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17774
diff
changeset
|
3544 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3545 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3546 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3547 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3548 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3549 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3550 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3551 return false; // keep some compilers happy |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3552 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3553 |
| 342 | 3554 void G1CollectedHeap::print_on(outputStream* st) const { |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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parents:
811
diff
changeset
|
3555 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3556 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
|
3557 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3558 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3559 _g1_storage.low_boundary(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3560 _g1_storage.high(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3561 _g1_storage.high_boundary()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3562 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3563 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
|
3564 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3565 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
|
3566 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3567 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
|
3568 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
|
3569 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3570 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3571 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3572 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3573 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3574 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3575 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3576 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3577 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3578 st->cr(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3579 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
|
3580 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3581 "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
|
3582 "PTAMS=previous top-at-mark-start, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3583 "NTAMS=next top-at-mark-start)"); |
| 342 | 3584 PrintRegionClosure blk(st); |
| 3766 | 3585 heap_region_iterate(&blk); |
| 342 | 3586 } |
| 3587 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3588 void G1CollectedHeap::print_on_error(outputStream* st) const { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3589 this->CollectedHeap::print_on_error(st); |
|
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 if (_cm != NULL) { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3592 st->cr(); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3593 _cm->print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3594 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3595 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3596 |
| 342 | 3597 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3598 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3599 workers()->print_worker_threads_on(st); |
| 3600 } | |
| 3601 _cmThread->print_on(st); | |
| 342 | 3602 st->cr(); |
| 1019 | 3603 _cm->print_worker_threads_on(st); |
| 3604 _cg1r->print_worker_threads_on(st); | |
| 17764 | 3605 if (G1StringDedup::is_enabled()) { |
| 3606 G1StringDedup::print_worker_threads_on(st); | |
| 3607 } | |
| 342 | 3608 } |
| 3609 | |
| 3610 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3611 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3612 workers()->threads_do(tc); |
| 3613 } | |
| 3614 tc->do_thread(_cmThread); | |
| 794 | 3615 _cg1r->threads_do(tc); |
| 17764 | 3616 if (G1StringDedup::is_enabled()) { |
| 3617 G1StringDedup::threads_do(tc); | |
| 3618 } | |
| 342 | 3619 } |
| 3620 | |
| 3621 void G1CollectedHeap::print_tracing_info() const { | |
| 3622 // We'll overload this to mean "trace GC pause statistics." | |
| 3623 if (TraceGen0Time || TraceGen1Time) { | |
| 3624 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3625 // to that. | |
| 3626 g1_policy()->print_tracing_info(); | |
| 3627 } | |
| 751 | 3628 if (G1SummarizeRSetStats) { |
| 342 | 3629 g1_rem_set()->print_summary_info(); |
| 3630 } | |
| 1282 | 3631 if (G1SummarizeConcMark) { |
| 342 | 3632 concurrent_mark()->print_summary_info(); |
| 3633 } | |
| 3634 g1_policy()->print_yg_surv_rate_info(); | |
| 3635 SpecializationStats::print(); | |
| 3636 } | |
| 3637 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3638 #ifndef PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3639 // Helpful for debugging RSet issues. |
|
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
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3774
diff
changeset
|
3641 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3642 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3643 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3644 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3645 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3646 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3647 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3648 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3649 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3650 _occupied_sum += occupied; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3651 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3652 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
|
3653 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3654 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3655 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3656 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3657 hrrs->print(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3658 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3659 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3660 return false; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3661 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3662 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3663 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3664 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3665 gclog_or_tty->print_cr("========================================"); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3666 gclog_or_tty->print_cr("%s", msg); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3667 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3668 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3669 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3670 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3671 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3672 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3673 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3674 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3675 }; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3676 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3677 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3678 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3679 collection_set_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3680 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3681 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3682 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3683 PrintRSetsClosure cl("Printing All RSets");; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3684 heap_region_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3685 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3686 #endif // PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3687 |
| 342 | 3688 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3689 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3690 "not a garbage-first heap"); | |
| 3691 return _g1h; | |
| 3692 } | |
| 3693 | |
| 3694 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
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parents:
1166
diff
changeset
|
3695 // always_do_update_barrier = false; |
| 342 | 3696 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3697 // Fill TLAB's and such | |
| 17727 | 3698 accumulate_statistics_all_tlabs(); |
| 342 | 3699 ensure_parsability(true); |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3700 |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3701 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3702 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3703 g1_rem_set()->print_periodic_summary_info("Before GC RS summary"); |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3704 } |
| 342 | 3705 } |
| 3706 | |
| 3707 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3708 |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3709 if (G1SummarizeRSetStats && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3710 (G1SummarizeRSetStatsPeriod > 0) && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3711 // we are at the end of the GC. Total collections has already been increased. |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3712 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3713 g1_rem_set()->print_periodic_summary_info("After GC RS summary"); |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3714 } |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3715 |
| 342 | 3716 // FIXME: what is this about? |
| 3717 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3718 // is set. | |
| 3719 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3720 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3721 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3722 |
| 17727 | 3723 resize_all_tlabs(); |
| 3724 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3725 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3726 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3727 Universe::update_heap_info_at_gc(); |
| 342 | 3728 } |
| 3729 | |
| 1973 | 3730 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3731 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
|
3732 bool* succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3733 GCCause::Cause gc_cause) { |
| 1973 | 3734 assert_heap_not_locked_and_not_at_safepoint(); |
| 342 | 3735 g1_policy()->record_stop_world_start(); |
| 1973 | 3736 VM_G1IncCollectionPause op(gc_count_before, |
| 3737 word_size, | |
| 3738 false, /* should_initiate_conc_mark */ | |
| 3739 g1_policy()->max_pause_time_ms(), | |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3740 gc_cause); |
| 1973 | 3741 VMThread::execute(&op); |
| 3742 | |
| 3743 HeapWord* result = op.result(); | |
| 3744 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3745 assert(result == NULL || ret_succeeded, | |
| 3746 "the result should be NULL if the VM did not succeed"); | |
| 3747 *succeeded = ret_succeeded; | |
| 3748 | |
| 3749 assert_heap_not_locked(); | |
| 3750 return result; | |
| 342 | 3751 } |
| 3752 | |
| 3753 void | |
| 3754 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3755 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
|
3756 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3757 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3758 CGC_lock->notify(); |
| 342 | 3759 } |
| 3760 } | |
| 3761 | |
| 3762 size_t G1CollectedHeap::pending_card_num() { | |
| 3763 size_t extra_cards = 0; | |
| 3764 JavaThread *curr = Threads::first(); | |
| 3765 while (curr != NULL) { | |
| 3766 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3767 extra_cards += dcq.size(); | |
| 3768 curr = curr->next(); | |
| 3769 } | |
| 3770 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3771 size_t buffer_size = dcqs.buffer_size(); | |
| 3772 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3773 |
| 3774 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3775 // in bytes - not the number of 'entries'. We need to convert | |
| 3776 // into a number of cards. | |
| 3777 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3778 } |
| 3779 | |
| 3780 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3781 return g1_rem_set()->cardsScanned(); |
| 342 | 3782 } |
| 3783 | |
| 3784 void | |
| 3785 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3786 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3787 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3788 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3789 if (_surviving_young_words == NULL) { |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3790 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
| 342 | 3791 "Not enough space for young surv words summary."); |
| 3792 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3793 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
|
3794 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3795 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
|
3796 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3797 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3798 #endif // !ASSERT |
| 342 | 3799 } |
| 3800 | |
| 3801 void | |
| 3802 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3803 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
|
3804 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
|
3805 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3806 _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
|
3807 } |
| 342 | 3808 } |
| 3809 | |
| 3810 void | |
| 3811 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3812 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3813 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3814 _surviving_young_words = NULL; |
| 3815 } | |
| 3816 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3817 #ifdef ASSERT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3818 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3819 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3820 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3821 // 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
|
3822 // 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
|
3823 // 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
|
3824 // 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
|
3825 // 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
|
3826 // 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
|
3827 // 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
|
3828 // 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
|
3829 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3830 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
|
3831 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3832 // 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
|
3833 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3834 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3835 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3836 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3837 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3838 |
| 1709 | 3839 #if TASKQUEUE_STATS |
| 3840 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3841 st->print_raw_cr("GC Task Stats"); | |
| 3842 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3843 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3844 } | |
| 3845 | |
| 3846 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3847 print_taskqueue_stats_hdr(st); | |
| 3848 | |
| 3849 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3850 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3851 for (int i = 0; i < n; ++i) { |
| 3852 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3853 totals += task_queue(i)->stats; | |
| 3854 } | |
| 3855 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3856 | |
| 3857 DEBUG_ONLY(totals.verify()); | |
| 3858 } | |
| 3859 | |
| 3860 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3861 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3862 for (int i = 0; i < n; ++i) { |
| 3863 task_queue(i)->stats.reset(); | |
| 3864 } | |
| 3865 } | |
| 3866 #endif // TASKQUEUE_STATS | |
| 3867 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3868 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3869 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3870 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3871 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3872 |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3873 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
|
3874 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3875 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
|
3876 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3877 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3878 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3879 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
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 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3883 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3884 return; |
|
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 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3887 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3888 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3889 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3890 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3891 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
|
3892 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3893 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3894 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3895 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3896 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3897 gclog_or_tty->print("--"); |
|
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 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3900 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
|
3901 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3902 gclog_or_tty->flush(); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3903 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3904 |
| 1973 | 3905 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3906 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3907 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3908 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3909 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3910 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3911 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3912 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3913 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3914 _gc_timer_stw->register_gc_start(); |
| 10405 | 3915 |
| 3916 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
| 3917 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3918 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3919 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3920 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3921 print_heap_before_gc(); |
| 10405 | 3922 trace_heap_before_gc(_gc_tracer_stw); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3923 |
| 2152 | 3924 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3925 verify_dirty_young_regions(); |
| 2152 | 3926 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3927 // 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
|
3928 // 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
|
3929 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3930 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3931 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3932 // 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
|
3933 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3934 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3935 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3936 // 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
|
3937 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
|
3938 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3939 // 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
|
3940 // 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
|
3941 // 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
|
3942 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
|
3943 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3944 // 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
|
3945 { |
| 10405 | 3946 EvacuationInfo evacuation_info; |
| 3947 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3948 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3949 // 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
|
3950 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3951 increment_old_marking_cycles_started(); |
| 10405 | 3952 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
|
3953 } |
| 10405 | 3954 |
| 3955 _gc_tracer_stw->report_yc_type(yc_type()); | |
| 3956 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3957 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3958 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3959 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
|
3960 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
|
3961 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
|
3962 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3963 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3964 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3965 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3966 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3967 |
| 2361 | 3968 // If the secondary_free_list is not empty, append it to the |
| 3969 // free_list. No need to wait for the cleanup operation to finish; | |
| 3970 // the region allocation code will check the secondary_free_list | |
| 3971 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3972 // set, skip this step so that the region allocation code has to | |
| 3973 // get entries from the secondary_free_list. | |
| 2152 | 3974 if (!G1StressConcRegionFreeing) { |
| 2361 | 3975 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3976 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3977 |
| 12080 | 3978 assert(check_young_list_well_formed(), "young list should be well formed"); |
| 3979 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3980 "sanity check"); | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3981 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3982 // 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
|
3983 // 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
|
3984 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3985 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3986 { // 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
|
3987 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3988 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3989 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3990 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
|
3991 increment_gc_time_stamp(); |
| 342 | 3992 |
|
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
|
3993 verify_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3994 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3995 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3996 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3998 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3999 // reference processing currently works in G1. |
|
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 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4002 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4003 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4004 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4005 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4006 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4007 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4008 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4009 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4010 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4011 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4012 // 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
|
4013 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4014 release_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4015 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4016 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4017 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4018 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4019 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4020 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4021 // 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
|
4022 // 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
|
4023 // 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
|
4024 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4025 // 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
|
4026 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4027 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4028 // 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
|
4029 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4030 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4031 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4033 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4034 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
|
4035 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4036 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4037 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
|
4038 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4039 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4040 // 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
|
4041 // 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
|
4042 // 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
|
4043 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4044 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
|
4045 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4046 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4047 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
|
4048 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
|
4049 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4050 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
|
4051 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4052 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4053 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4054 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4055 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4056 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4057 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4058 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4059 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4060 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4061 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4062 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4063 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 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
|
4065 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4066 |
| 10405 | 4067 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4068 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4069 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4070 // 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
|
4071 // 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
|
4072 // 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
|
4073 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4074 _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
|
4075 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4076 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4077 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4078 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4080 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4081 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4082 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4087 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4088 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4089 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4090 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4091 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4092 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4093 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4094 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4095 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4096 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4097 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4098 #endif // ASSERT |
| 1707 | 4099 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4100 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4101 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 // Initialize the GC alloc regions. |
| 10405 | 4103 init_gc_alloc_regions(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4104 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4105 // Actually do the work... |
| 10405 | 4106 evacuate_collection_set(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4107 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4108 // 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
|
4109 // (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
|
4110 // 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
|
4111 // 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
|
4112 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4113 _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
|
4114 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4115 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4116 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4117 |
| 10405 | 4118 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4119 g1_policy()->clear_collection_set(); |
|
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 cleanup_surviving_young_words(); |
|
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 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4130 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4131 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4132 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4133 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4134 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4135 "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
|
4136 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4137 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4138 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4139 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4140 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4141 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4142 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
| 10405 | 4143 _young_list->first_survivor_region(), |
| 4144 _young_list->last_survivor_region()); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4145 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4146 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4147 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4148 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4149 _summary_bytes_used = recalculate_used(); |
| 10405 | 4150 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
| 4151 for (uint i = 0; i < n_queues; i++) { | |
| 4152 if (_evacuation_failed_info_array[i].has_failed()) { | |
| 4153 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
| 4154 } | |
| 4155 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4160 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4163 // 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
|
4164 // 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
|
4165 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4168 // 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
|
4169 // 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
|
4170 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4173 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4174 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4175 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4177 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4178 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
|
4179 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4180 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4181 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4182 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4183 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4184 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4185 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4186 size_t bytes_before = capacity(); |
| 4785 | 4187 // No need for an ergo verbose message here, |
| 4188 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4189 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4190 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4191 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4192 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4193 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4194 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4195 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4196 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4197 |
| 10405 | 4198 // 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
|
4199 // 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
|
4200 _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
|
4201 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4202 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4203 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4204 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4205 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4206 // 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
|
4207 // 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
|
4208 // 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
|
4209 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
|
4210 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
| 10405 | 4211 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
|
4212 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4213 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4214 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4215 // 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
|
4216 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4217 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4218 // 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
|
4219 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4220 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4221 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4222 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4223 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4224 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4225 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4226 // 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
|
4227 // 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
|
4228 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4229 // 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
|
4230 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4231 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4232 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4233 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4234 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4235 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4236 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4237 |
|
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
|
4238 verify_after_gc(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4239 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4240 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4241 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4242 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4243 // 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
|
4244 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4245 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4246 // 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
|
4247 // 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
|
4248 // 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
|
4249 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4250 _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
|
4251 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4252 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4253 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4254 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4255 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4256 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4257 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4258 #endif |
| 342 | 4259 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4260 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4261 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4262 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4263 // 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
|
4264 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
|
4265 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4266 // 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
|
4267 // 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
|
4268 // 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
|
4269 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4270 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4271 _hrs.verify_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4272 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4273 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4274 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
|
4275 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4276 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4277 print_heap_after_gc(); |
| 10405 | 4278 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
|
4279 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4280 // 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
|
4281 // 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
|
4282 // 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
|
4283 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4284 g1mm()->update_sizes(); |
| 10405 | 4285 |
| 4286 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
| 4287 _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
|
4288 _gc_timer_stw->register_gc_end(); |
| 10405 | 4289 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
| 4290 } | |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4291 // 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
|
4292 // 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
|
4293 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4294 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4295 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4296 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4297 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4298 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4299 // 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
|
4300 // 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
|
4301 // not start until the safepoint itself is released in |
| 20192 | 4302 // SuspendibleThreadSet::desynchronize(). |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4303 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4304 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4305 |
| 1973 | 4306 return true; |
| 342 | 4307 } |
| 4308 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4309 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4310 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4311 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4312 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4313 case GCAllocForSurvived: |
| 6595 | 4314 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4315 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4316 case GCAllocForTenured: |
| 6595 | 4317 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4318 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4319 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4320 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4321 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4322 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4323 } |
| 6595 | 4324 |
| 4325 // Prevent humongous PLAB sizes for two reasons: | |
| 4326 // * PLABs are allocated using a similar paths as oops, but should | |
| 4327 // never be in a humongous region | |
| 4328 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4329 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
|
4330 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4331 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4332 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4333 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4334 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4335 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4336 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4337 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4338 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4339 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4340 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4341 |
| 10405 | 4342 void G1CollectedHeap::init_gc_alloc_regions(EvacuationInfo& evacuation_info) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4343 assert_at_safepoint(true /* should_be_vm_thread */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4344 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4345 _survivor_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4346 _old_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4347 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
|
4348 _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
|
4349 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4350 // 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
|
4351 // 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
|
4352 // 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
|
4353 // 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
|
4354 // 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
|
4355 // 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
|
4356 // during a cleanup and was added to the free list, but |
| 10405 | 4357 // 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
|
4358 // 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
|
4359 if (retained_region != NULL && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4360 !retained_region->in_collection_set() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4361 !(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
|
4362 !retained_region->is_empty() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4363 !retained_region->isHumongous()) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4364 retained_region->set_saved_mark(); |
| 4072 | 4365 // The retained region was added to the old region set when it was |
| 4366 // retired. We have to remove it now, since we don't allow regions | |
| 4367 // we allocate to in the region sets. We'll re-add it later, when | |
| 4368 // it's retired again. | |
| 4369 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4370 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
|
4371 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
|
4372 _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
|
4373 _hr_printer.reuse(retained_region); |
| 10405 | 4374 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
| 4375 } | |
| 4376 } | |
| 4377 | |
| 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 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4384 // _retained_old_gc_alloc_region will become NULL. This is what we |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4385 // want either way so no reason to check explicitly for either |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
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|
4386 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
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
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
4395 void G1CollectedHeap::abandon_gc_alloc_regions() { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4396 assert(_survivor_gc_alloc_region.get() == NULL, "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
4397 assert(_old_gc_alloc_region.get() == NULL, "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
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
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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4781
diff
changeset
|
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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4781
diff
changeset
|
4418 |
|
17757
eff02b5bd56c
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tschatzl
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17756
diff
changeset
|
4419 double remove_self_forwards_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
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diff
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|
4420 |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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4781
diff
changeset
|
4421 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
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|
4422 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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parents:
4781
diff
changeset
|
4423 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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parents:
4781
diff
changeset
|
4424 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4425 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4426 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4427 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
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diff
changeset
|
4428 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4429 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
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|
4430 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4431 assert(check_cset_heap_region_claim_values(HeapRegion::ParEvacFailureClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
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diff
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|
4432 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
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diff
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
johnc
parents:
4781
diff
changeset
|
4434 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
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|
4435 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4436 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4437 |
| 4438 // Now restore saved marks, if any. | |
|
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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7455
diff
changeset
|
4439 assert(_objs_with_preserved_marks.size() == |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4440 _preserved_marks_of_objs.size(), "Both or none."); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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diff
changeset
|
4441 while (!_objs_with_preserved_marks.is_empty()) { |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
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diff
changeset
|
4442 oop obj = _objs_with_preserved_marks.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4443 markOop m = _preserved_marks_of_objs.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
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diff
changeset
|
4444 obj->set_mark(m); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4445 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
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diff
changeset
|
4446 _objs_with_preserved_marks.clear(true); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4447 _preserved_marks_of_objs.clear(true); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4448 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
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diff
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
tonyp
parents:
4785
diff
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 ...
tonyp
parents:
3317
diff
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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parents:
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 ...
tonyp
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 ...
tonyp
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
parents:
7455
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
parents:
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
tonyp
parents:
3824
diff
changeset
|
4542 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4543 HeapWord* result = survivor_attempt_allocation(word_size); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4544 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4545 return result; |
| 342 | 4546 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
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
tonyp
parents:
3824
diff
changeset
|
4548 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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
tonyp
parents:
3824
diff
changeset
|
4551 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4552 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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
parents:
3824
diff
changeset
|
4554 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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
parents:
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
tonyp
parents:
3824
diff
changeset
|
4558 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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
tonyp
parents:
3824
diff
changeset
|
4561 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4562 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4563 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4564 // Trying to keep some compilers happy. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
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 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4571 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num, ReferenceProcessor* rp) |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4572 : _g1h(g1h), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4573 _refs(g1h->task_queue(queue_num)), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4574 _dcq(&g1h->dirty_card_queue_set()), |
| 12343 | 4575 _ct_bs(g1h->g1_barrier_set()), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4576 _g1_rem(g1h->g1_rem_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4577 _hash_seed(17), _queue_num(queue_num), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4578 _term_attempts(0), |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4579 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4580 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4581 _age_table(false), _scanner(g1h, this, rp), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4582 _strong_roots_time(0), _term_time(0), |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4583 _alloc_buffer_waste(0), _undo_waste(0) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4584 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4585 // we "sacrifice" entry 0 to keep track of surviving bytes for |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4586 // non-young regions (where the age is -1) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4587 // We also add a few elements at the beginning and at the end in |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4588 // an attempt to eliminate cache contention |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4589 uint real_length = 1 + _g1h->g1_policy()->young_cset_region_length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4590 uint array_length = PADDING_ELEM_NUM + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4591 real_length + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4592 PADDING_ELEM_NUM; |
| 6197 | 4593 _surviving_young_words_base = NEW_C_HEAP_ARRAY(size_t, array_length, mtGC); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
838
diff
changeset
|
4594 if (_surviving_young_words_base == NULL) |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
4595 vm_exit_out_of_memory(array_length * sizeof(size_t), OOM_MALLOC_ERROR, |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
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diff
changeset
|
4596 "Not enough space for young surv histo."); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4597 _surviving_young_words = _surviving_young_words_base + PADDING_ELEM_NUM; |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4598 memset(_surviving_young_words, 0, (size_t) real_length * sizeof(size_t)); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
838
diff
changeset
|
4599 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4600 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4601 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4602 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
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diff
changeset
|
4603 _start = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
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diff
changeset
|
4604 } |
| 342 | 4605 |
| 1709 | 4606 void |
| 4607 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
| 4608 { | |
| 4609 st->print_raw_cr("GC Termination Stats"); | |
| 4610 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
| 4611 " ------waste (KiB)------"); | |
| 4612 st->print_raw_cr("thr ms ms % ms % attempts" | |
| 4613 " total alloc undo"); | |
| 4614 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
| 4615 " ------- ------- -------"); | |
| 4616 } | |
| 4617 | |
| 4618 void | |
| 4619 G1ParScanThreadState::print_termination_stats(int i, | |
| 4620 outputStream* const st) const | |
| 4621 { | |
| 4622 const double elapsed_ms = elapsed_time() * 1000.0; | |
| 4623 const double s_roots_ms = strong_roots_time() * 1000.0; | |
| 4624 const double term_ms = term_time() * 1000.0; | |
| 4625 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
| 4626 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
| 4627 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
| 4628 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
| 4629 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
| 4630 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
| 4631 alloc_buffer_waste() * HeapWordSize / K, | |
| 4632 undo_waste() * HeapWordSize / K); | |
| 4633 } | |
| 4634 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4635 #ifdef ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4636 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4637 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4638 assert(UseCompressedOops, "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4639 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4640 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4641 assert(_g1h->is_in_g1_reserved(p), |
|
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4642 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4643 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4644 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4645 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4646 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4647 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4648 if (has_partial_array_mask(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4649 // Must be in the collection set--it's already been copied. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4650 oop p = clear_partial_array_mask(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4651 assert(_g1h->obj_in_cs(p), |
|
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4652 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4653 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4654 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4655 assert(_g1h->is_in_g1_reserved(p), |
|
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4656 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4657 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4658 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4659 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4660 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4661 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4662 if (ref.is_narrow()) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4663 return verify_ref((narrowOop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4664 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4665 return verify_ref((oop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4666 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4667 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4668 #endif // ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4669 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4670 void G1ParScanThreadState::trim_queue() { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4671 assert(_evac_failure_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4672 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4673 StarTask ref; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4674 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4675 // Drain the overflow stack first, so other threads can steal. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4676 while (refs()->pop_overflow(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4677 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4678 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4679 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4680 while (refs()->pop_local(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4681 deal_with_reference(ref); |
|
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 } while (!refs()->is_empty()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4684 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4685 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4686 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4687 G1ParScanThreadState* par_scan_state) : |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4688 _g1(g1), _par_scan_state(par_scan_state), |
|
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4689 _worker_id(par_scan_state->queue_num()) { } |
|
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4690 |
|
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4691 void G1ParCopyHelper::mark_object(oop obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4692 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4693 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4694 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4695 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
|
4696 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4697 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4698 // 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
|
4699 _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
|
4700 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4701 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4702 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
|
4703 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4704 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
|
4705 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
|
4706 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
|
4707 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4708 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
|
4709 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4710 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
|
4711 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4712 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
|
4713 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4714 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
|
4715 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4716 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4717 // 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
|
4718 // 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
|
4719 // 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
|
4720 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4721 _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
|
4722 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4723 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4724 oop G1ParScanThreadState::copy_to_survivor_space(oop const old) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4725 size_t word_sz = old->size(); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4726 HeapRegion* from_region = _g1h->heap_region_containing_raw(old); |
| 342 | 4727 // +1 to make the -1 indexes valid... |
| 4728 int young_index = from_region->young_index_in_cset()+1; | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4729 assert( (from_region->is_young() && young_index > 0) || |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4730 (!from_region->is_young() && young_index == 0), "invariant" ); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4731 G1CollectorPolicy* g1p = _g1h->g1_policy(); |
| 342 | 4732 markOop m = old->mark(); |
| 545 | 4733 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
| 4734 : m->age(); | |
| 4735 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
| 342 | 4736 word_sz); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4737 HeapWord* obj_ptr = allocate(alloc_purpose, word_sz); |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4738 #ifndef PRODUCT |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4739 // Should this evacuation fail? |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4740 if (_g1h->evacuation_should_fail()) { |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4741 if (obj_ptr != NULL) { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4742 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4743 obj_ptr = NULL; |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4744 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4745 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4746 #endif // !PRODUCT |
| 342 | 4747 |
| 4748 if (obj_ptr == NULL) { | |
| 4749 // This will either forward-to-self, or detect that someone else has | |
| 4750 // installed a forwarding pointer. | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4751 return _g1h->handle_evacuation_failure_par(this, old); |
| 342 | 4752 } |
| 4753 | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4754 oop obj = oop(obj_ptr); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4755 |
| 526 | 4756 // We're going to allocate linearly, so might as well prefetch ahead. |
| 4757 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
| 4758 | |
| 342 | 4759 oop forward_ptr = old->forward_to_atomic(obj); |
| 4760 if (forward_ptr == NULL) { | |
| 4761 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
|
17749
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4762 |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4763 // alloc_purpose is just a hint to allocate() above, recheck the type of region |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4764 // we actually allocated from and update alloc_purpose accordingly |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4765 HeapRegion* to_region = _g1h->heap_region_containing_raw(obj_ptr); |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4766 alloc_purpose = to_region->is_young() ? GCAllocForSurvived : GCAllocForTenured; |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4767 |
| 526 | 4768 if (g1p->track_object_age(alloc_purpose)) { |
| 4769 // We could simply do obj->incr_age(). However, this causes a | |
| 4770 // performance issue. obj->incr_age() will first check whether | |
| 4771 // the object has a displaced mark by checking its mark word; | |
| 4772 // getting the mark word from the new location of the object | |
| 4773 // stalls. So, given that we already have the mark word and we | |
| 4774 // are about to install it anyway, it's better to increase the | |
| 4775 // age on the mark word, when the object does not have a | |
| 4776 // displaced mark word. We're not expecting many objects to have | |
| 4777 // a displaced marked word, so that case is not optimized | |
| 4778 // further (it could be...) and we simply call obj->incr_age(). | |
| 4779 | |
| 4780 if (m->has_displaced_mark_helper()) { | |
| 4781 // in this case, we have to install the mark word first, | |
| 4782 // otherwise obj looks to be forwarded (the old mark word, | |
| 4783 // which contains the forward pointer, was copied) | |
| 4784 obj->set_mark(m); | |
| 4785 obj->incr_age(); | |
| 4786 } else { | |
| 4787 m = m->incr_age(); | |
| 545 | 4788 obj->set_mark(m); |
| 526 | 4789 } |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4790 age_table()->add(obj, word_sz); |
| 545 | 4791 } else { |
| 4792 obj->set_mark(m); | |
| 526 | 4793 } |
| 4794 | |
| 17764 | 4795 if (G1StringDedup::is_enabled()) { |
| 4796 G1StringDedup::enqueue_from_evacuation(from_region->is_young(), | |
| 4797 to_region->is_young(), | |
| 4798 queue_num(), | |
| 4799 obj); | |
| 4800 } | |
| 4801 | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4802 size_t* surv_young_words = surviving_young_words(); |
| 342 | 4803 surv_young_words[young_index] += word_sz; |
| 4804 | |
| 4805 if (obj->is_objArray() && arrayOop(obj)->length() >= ParGCArrayScanChunk) { | |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4806 // We keep track of the next start index in the length field of |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4807 // the to-space object. The actual length can be found in the |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4808 // length field of the from-space object. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4809 arrayOop(obj)->set_length(0); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4810 oop* old_p = set_partial_array_mask(old); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4811 push_on_queue(old_p); |
| 342 | 4812 } else { |
| 526 | 4813 // No point in using the slower heap_region_containing() method, |
| 4814 // given that we know obj is in the heap. | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4815 _scanner.set_region(_g1h->heap_region_containing_raw(obj)); |
| 5987 | 4816 obj->oop_iterate_backwards(&_scanner); |
| 342 | 4817 } |
| 4818 } else { | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4819 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
| 342 | 4820 obj = forward_ptr; |
| 4821 } | |
| 4822 return obj; | |
| 4823 } | |
| 4824 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4825 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4826 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
|
4827 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
|
4828 _scanned_klass->record_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4829 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4830 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4831 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4832 template <G1Barrier barrier, bool do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4833 template <class T> |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4834 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
|
4835 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
|
4836 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4837 if (oopDesc::is_null(heap_oop)) { |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4838 return; |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4839 } |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4840 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4841 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
|
4842 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4843 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4844 |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4845 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
|
4846 oop forwardee; |
| 526 | 4847 if (obj->is_forwarded()) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4848 forwardee = obj->forwardee(); |
| 526 | 4849 } else { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4850 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
| 342 | 4851 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4852 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
|
4853 oopDesc::encode_store_heap_oop(p, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4854 if (do_mark_object && forwardee != obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4855 // 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
|
4856 // 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
|
4857 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4858 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4859 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4860 if (barrier == G1BarrierKlass) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4861 do_klass_barrier(p, forwardee); |
| 342 | 4862 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4863 } else { |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4864 // The object is not in collection set. If we're a root scanning |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4865 // closure during an initial mark pause (i.e. do_mark_object will |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4866 // be true) then attempt to mark the object. |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4867 if (do_mark_object) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4868 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4869 } |
| 526 | 4870 } |
| 4871 | |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4872 if (barrier == G1BarrierEvac) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4873 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4874 } |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4875 } |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4876 |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4877 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(oop* p); |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4878 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
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|
4879 |
| 342 | 4880 class G1ParEvacuateFollowersClosure : public VoidClosure { |
| 4881 protected: | |
| 4882 G1CollectedHeap* _g1h; | |
| 4883 G1ParScanThreadState* _par_scan_state; | |
| 4884 RefToScanQueueSet* _queues; | |
| 4885 ParallelTaskTerminator* _terminator; | |
| 4886 | |
| 4887 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4888 RefToScanQueueSet* queues() { return _queues; } | |
| 4889 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4890 | |
| 4891 public: | |
| 4892 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4893 G1ParScanThreadState* par_scan_state, | |
| 4894 RefToScanQueueSet* queues, | |
| 4895 ParallelTaskTerminator* terminator) | |
| 4896 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4897 _queues(queues), _terminator(terminator) {} | |
| 4898 | |
|
1862
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diff
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|
4899 void do_void(); |
|
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|
4900 |
|
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|
4901 private: |
|
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|
4902 inline bool offer_termination(); |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
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diff
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|
4903 }; |
|
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|
4904 |
|
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|
4905 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
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|
4906 G1ParScanThreadState* const pss = par_scan_state(); |
|
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|
4907 pss->start_term_time(); |
|
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|
4908 const bool res = terminator()->offer_termination(); |
|
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|
4909 pss->end_term_time(); |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
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|
4910 return res; |
|
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|
4911 } |
|
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|
4912 |
|
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|
4913 void G1ParEvacuateFollowersClosure::do_void() { |
|
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|
4914 StarTask stolen_task; |
|
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|
4915 G1ParScanThreadState* const pss = par_scan_state(); |
|
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|
4916 pss->trim_queue(); |
|
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|
4917 |
|
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|
4918 do { |
|
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|
4919 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
|
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|
4920 assert(pss->verify_task(stolen_task), "sanity"); |
|
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|
4921 if (stolen_task.is_narrow()) { |
|
1883
35e4e086d5f5
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changeset
|
4922 pss->deal_with_reference((narrowOop*) stolen_task); |
|
1862
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|
4923 } else { |
|
1883
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|
4924 pss->deal_with_reference((oop*) stolen_task); |
|
1862
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|
4925 } |
|
1883
35e4e086d5f5
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|
4926 |
|
35e4e086d5f5
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changeset
|
4927 // We've just processed a reference and we might have made |
|
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|
4928 // available new entries on the queues. So we have to make sure |
|
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|
4929 // we drain the queues as necessary. |
| 342 | 4930 pss->trim_queue(); |
| 4931 } | |
|
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|
4932 } while (!offer_termination()); |
|
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|
4933 } |
| 342 | 4934 |
|
6725
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|
4935 class G1KlassScanClosure : public KlassClosure { |
|
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|
4936 G1ParCopyHelper* _closure; |
|
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|
4937 bool _process_only_dirty; |
|
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|
4938 int _count; |
|
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|
4939 public: |
|
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|
4940 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
|
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|
4941 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
|
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|
4942 void do_klass(Klass* klass) { |
|
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|
4943 // If the klass has not been dirtied we know that there's |
|
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|
4944 // no references into the young gen and we can skip it. |
|
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|
4945 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
da91efe96a93
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|
4946 // Clean the klass since we're going to scavenge all the metadata. |
|
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changeset
|
4947 klass->clear_modified_oops(); |
|
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changeset
|
4948 |
|
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changeset
|
4949 // 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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diff
changeset
|
4950 // and is the one to dirty if oops are left pointing into the young gen. |
|
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changeset
|
4951 _closure->set_scanned_klass(klass); |
|
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|
4952 |
|
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diff
changeset
|
4953 klass->oops_do(_closure); |
|
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6964458: Reimplement class meta-data storage to use native memory
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|
4954 |
|
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diff
changeset
|
4955 _closure->set_scanned_klass(NULL); |
|
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6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
4956 } |
|
da91efe96a93
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diff
changeset
|
4957 _count++; |
|
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diff
changeset
|
4958 } |
|
da91efe96a93
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6629
diff
changeset
|
4959 }; |
|
da91efe96a93
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diff
changeset
|
4960 |
| 342 | 4961 class G1ParTask : public AbstractGangTask { |
| 4962 protected: | |
| 4963 G1CollectedHeap* _g1h; | |
| 4964 RefToScanQueueSet *_queues; | |
| 4965 ParallelTaskTerminator _terminator; | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4966 uint _n_workers; |
| 342 | 4967 |
| 4968 Mutex _stats_lock; | |
| 4969 Mutex* stats_lock() { return &_stats_lock; } | |
| 4970 | |
| 4971 size_t getNCards() { | |
| 4972 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 4973 / G1BlockOffsetSharedArray::N_bytes; | |
| 4974 } | |
| 4975 | |
| 4976 public: | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
4977 G1ParTask(G1CollectedHeap* g1h, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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diff
changeset
|
4978 RefToScanQueueSet *task_queues) |
| 342 | 4979 : AbstractGangTask("G1 collection"), |
| 4980 _g1h(g1h), | |
| 4981 _queues(task_queues), | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
4982 _terminator(0, _queues), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
4983 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4984 {} |
| 4985 | |
| 4986 RefToScanQueueSet* queues() { return _queues; } | |
| 4987 | |
| 4988 RefToScanQueue *work_queue(int i) { | |
| 4989 return queues()->queue(i); | |
| 4990 } | |
| 4991 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
4992 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
4993 |
|
bca17e38de00
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4090
diff
changeset
|
4994 virtual void set_for_termination(int active_workers) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
4995 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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diff
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|
4996 // in the young space (_par_seq_tasks) in the G1 heap |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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diff
changeset
|
4997 // for SequentialSubTasksDone. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
4998 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
bca17e38de00
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4090
diff
changeset
|
4999 // both of which need setting by set_n_termination(). |
|
bca17e38de00
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4090
diff
changeset
|
5000 _g1h->SharedHeap::set_n_termination(active_workers); |
|
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6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
changeset
|
5001 _g1h->set_n_termination(active_workers); |
|
bca17e38de00
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4090
diff
changeset
|
5002 terminator()->reset_for_reuse(active_workers); |
|
bca17e38de00
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|
5003 _n_workers = active_workers; |
|
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4090
diff
changeset
|
5004 } |
|
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diff
changeset
|
5005 |
|
4728
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diff
changeset
|
5006 void work(uint worker_id) { |
|
441e946dc1af
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jmasa
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diff
changeset
|
5007 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 5008 |
| 5009 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
|
5010 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 5011 |
|
5986
500023bd0818
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5963
diff
changeset
|
5012 { |
|
500023bd0818
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5963
diff
changeset
|
5013 ResourceMark rm; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
5014 HandleMark hm; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
5015 |
|
500023bd0818
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diff
changeset
|
5016 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
500023bd0818
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5963
diff
changeset
|
5017 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
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17688
diff
changeset
|
5018 G1ParScanThreadState pss(_g1h, worker_id, rp); |
|
5986
500023bd0818
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diff
changeset
|
5019 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
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17758
diff
changeset
|
5020 |
|
5986
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diff
changeset
|
5021 pss.set_evac_failure_closure(&evac_failure_cl); |
|
500023bd0818
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diff
changeset
|
5022 |
|
500023bd0818
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5963
diff
changeset
|
5023 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
|
6725
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changeset
|
5024 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
|
5986
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diff
changeset
|
5025 |
|
500023bd0818
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diff
changeset
|
5026 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
5027 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
|
da91efe96a93
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changeset
|
5028 |
|
da91efe96a93
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6629
diff
changeset
|
5029 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
da91efe96a93
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coleenp
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changeset
|
5030 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
|
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changeset
|
5031 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5032 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5033 OopClosure* scan_root_cl = &only_scan_root_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5034 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5035 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5036 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5037 // We also need to mark copied objects. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5038 scan_root_cl = &scan_mark_root_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5039 scan_klasses_cl = &scan_mark_klasses_cl_s; |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5040 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5041 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5042 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5043 |
| 12080 | 5044 // Don't scan the scavengable methods in the code cache as part |
| 5045 // of strong root scanning. The code roots that point into a | |
| 5046 // region in the collection set are scanned when we scan the | |
| 5047 // region's RSet. | |
| 5048 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5049 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5050 pss.start_strong_roots(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5051 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5052 SharedHeap::ScanningOption(so), |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5053 scan_root_cl, |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5054 &push_heap_rs_cl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5055 scan_klasses_cl, |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5056 worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5057 pss.end_strong_roots(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5058 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5059 { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5060 double start = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5061 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5062 evac.do_void(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5063 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
|
5064 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
|
5065 _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
|
5066 _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)
johnc
parents:
5963
diff
changeset
|
5067 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5068 _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
|
5069 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5070 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5071 if (ParallelGCVerbose) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5072 MutexLocker x(stats_lock()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5073 pss.print_termination_stats(worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5074 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5075 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5076 assert(pss.refs()->is_empty(), "should be empty"); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5077 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5078 // 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
|
5079 // 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
|
5080 // "GC Worker Time". |
| 342 | 5081 } |
| 5082 | |
| 1611 | 5083 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
|
5084 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 5085 } |
| 5086 }; | |
| 5087 | |
| 5088 // *** Common G1 Evacuation Stuff | |
| 5089 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5090 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5091 |
| 342 | 5092 void |
| 5093 G1CollectedHeap:: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5094 g1_process_strong_roots(bool is_scavenging, |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
5095 ScanningOption so, |
| 342 | 5096 OopClosure* scan_non_heap_roots, |
| 5097 OopsInHeapRegionClosure* scan_rs, | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5098 G1KlassScanClosure* scan_klasses, |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
5099 uint worker_i) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5100 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5101 // First scan the strong roots |
| 342 | 5102 double ext_roots_start = os::elapsedTime(); |
| 5103 double closure_app_time_sec = 0.0; | |
| 5104 | |
| 5105 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
| 5106 | |
| 12080 | 5107 assert(so & SO_CodeCache || scan_rs != NULL, "must scan code roots somehow"); |
| 5108 // Walk the code cache/strong code roots w/o buffering, because StarTask | |
| 5109 // cannot handle unaligned oop locations. | |
| 5110 CodeBlobToOopClosure eager_scan_code_roots(scan_non_heap_roots, true /* do_marking */); | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5111 |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5112 process_strong_roots(false, // no scoping; this is parallel code |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5113 is_scavenging, so, |
| 342 | 5114 &buf_scan_non_heap_roots, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5115 &eager_scan_code_roots, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5116 scan_klasses |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5117 ); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5118 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5119 // 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
|
5120 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
|
5121 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5122 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5123 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5124 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5125 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
|
5126 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5127 |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5128 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 5129 buf_scan_non_heap_roots.done(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5130 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5131 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5132 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5133 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
johnc
parents:
3778
diff
changeset
|
5134 |
| 342 | 5135 double ext_root_time_ms = |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5136 ((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5137 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5138 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 5139 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5140 // During conc marking we have to filter the per-thread SATB buffers |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5141 // to make sure we remove any oops into the CSet (which will show up |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5142 // as implicitly live). |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5143 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5144 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5145 if (mark_in_progress()) { |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5146 double satb_filter_start = os::elapsedTime(); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5147 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5148 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5149 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5150 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5151 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5152 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5153 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 5154 |
| 12080 | 5155 // If this is an initial mark pause, and we're not scanning |
| 5156 // the entire code cache, we need to mark the oops in the | |
| 5157 // strong code root lists for the regions that are not in | |
| 5158 // the collection set. | |
| 5159 // Note all threads participate in this set of root tasks. | |
| 5160 double mark_strong_code_roots_ms = 0.0; | |
| 5161 if (g1_policy()->during_initial_mark_pause() && !(so & SO_CodeCache)) { | |
| 5162 double mark_strong_roots_start = os::elapsedTime(); | |
| 5163 mark_strong_code_roots(worker_i); | |
| 5164 mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; | |
| 5165 } | |
| 5166 g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); | |
| 5167 | |
| 342 | 5168 // Now scan the complement of the collection set. |
| 5169 if (scan_rs != NULL) { | |
| 12080 | 5170 g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
| 342 | 5171 } |
| 5172 _process_strong_tasks->all_tasks_completed(); | |
| 5173 } | |
| 5174 | |
| 5175 void | |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5176 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure) { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5177 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5178 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
| 342 | 5179 } |
| 5180 | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5181 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5182 private: |
|
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|
5183 BoolObjectClosure* _is_alive; |
|
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|
5184 int _initial_string_table_size; |
|
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|
5185 int _initial_symbol_table_size; |
|
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|
5186 |
|
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|
5187 bool _process_strings; |
|
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|
5188 int _strings_processed; |
|
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|
5189 int _strings_removed; |
|
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|
5190 |
|
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changeset
|
5191 bool _process_symbols; |
|
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|
5192 int _symbols_processed; |
|
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|
5193 int _symbols_removed; |
|
17652
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|
5194 |
|
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|
5195 bool _do_in_parallel; |
|
17634
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|
5196 public: |
|
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|
5197 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
|
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|
5198 AbstractGangTask("Par String/Symbol table unlink"), _is_alive(is_alive), |
|
17652
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|
5199 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
|
17634
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|
5200 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
|
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|
5201 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
|
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|
5202 |
|
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|
5203 _initial_string_table_size = StringTable::the_table()->table_size(); |
|
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|
5204 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
|
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|
5205 if (process_strings) { |
|
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|
5206 StringTable::clear_parallel_claimed_index(); |
|
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|
5207 } |
|
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|
5208 if (process_symbols) { |
|
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|
5209 SymbolTable::clear_parallel_claimed_index(); |
|
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|
5210 } |
|
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|
5211 } |
|
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|
5212 |
|
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|
5213 ~G1StringSymbolTableUnlinkTask() { |
|
17652
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|
5214 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
|
17634
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|
5215 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
|
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|
5216 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
|
17652
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|
5217 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
|
17634
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|
5218 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
|
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|
5219 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
|
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|
5220 } |
|
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|
5221 |
|
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|
5222 void work(uint worker_id) { |
|
17652
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|
5223 if (_do_in_parallel) { |
|
17634
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|
5224 int strings_processed = 0; |
|
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|
5225 int strings_removed = 0; |
|
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|
5226 int symbols_processed = 0; |
|
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|
5227 int symbols_removed = 0; |
|
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|
5228 if (_process_strings) { |
|
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|
5229 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
|
5a32d2a3cc1e
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|
5230 Atomic::add(strings_processed, &_strings_processed); |
|
5a32d2a3cc1e
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|
5231 Atomic::add(strings_removed, &_strings_removed); |
|
5a32d2a3cc1e
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|
5232 } |
|
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|
5233 if (_process_symbols) { |
|
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|
5234 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
|
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|
5235 Atomic::add(symbols_processed, &_symbols_processed); |
|
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|
5236 Atomic::add(symbols_removed, &_symbols_removed); |
|
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|
5237 } |
|
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|
5238 } else { |
|
5a32d2a3cc1e
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changeset
|
5239 if (_process_strings) { |
|
5a32d2a3cc1e
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changeset
|
5240 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
|
5a32d2a3cc1e
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|
5241 } |
|
5a32d2a3cc1e
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|
5242 if (_process_symbols) { |
|
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changeset
|
5243 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
|
5a32d2a3cc1e
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|
5244 } |
|
5a32d2a3cc1e
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changeset
|
5245 } |
|
5a32d2a3cc1e
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diff
changeset
|
5246 } |
|
5a32d2a3cc1e
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changeset
|
5247 |
|
5a32d2a3cc1e
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changeset
|
5248 size_t strings_processed() const { return (size_t)_strings_processed; } |
|
5a32d2a3cc1e
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|
5249 size_t strings_removed() const { return (size_t)_strings_removed; } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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|
5250 |
|
5a32d2a3cc1e
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|
5251 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
|
5a32d2a3cc1e
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|
5252 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
|
5a32d2a3cc1e
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tschatzl
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|
5253 }; |
|
5a32d2a3cc1e
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changeset
|
5254 |
|
5a32d2a3cc1e
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changeset
|
5255 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
|
5a32d2a3cc1e
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|
5256 bool process_strings, bool process_symbols) { |
|
5a32d2a3cc1e
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tschatzl
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|
5257 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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changeset
|
5258 _g1h->workers()->active_workers() : 1); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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changeset
|
5259 |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5260 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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changeset
|
5261 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
5a32d2a3cc1e
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tschatzl
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changeset
|
5262 set_par_threads(n_workers); |
|
5a32d2a3cc1e
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diff
changeset
|
5263 workers()->run_task(&g1_unlink_task); |
|
5a32d2a3cc1e
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tschatzl
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changeset
|
5264 set_par_threads(0); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5265 } else { |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5266 g1_unlink_task.work(0); |
|
5a32d2a3cc1e
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tschatzl
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changeset
|
5267 } |
|
5a32d2a3cc1e
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changeset
|
5268 if (G1TraceStringSymbolTableScrubbing) { |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5269 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
|
5a32d2a3cc1e
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changeset
|
5270 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
|
5a32d2a3cc1e
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changeset
|
5271 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
|
5a32d2a3cc1e
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|
5272 g1_unlink_task.strings_processed(), g1_unlink_task.strings_removed(), |
|
5a32d2a3cc1e
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|
5273 g1_unlink_task.symbols_processed(), g1_unlink_task.symbols_removed()); |
|
5a32d2a3cc1e
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|
5274 } |
| 17764 | 5275 |
| 5276 if (G1StringDedup::is_enabled()) { | |
| 5277 G1StringDedup::unlink(is_alive); | |
| 5278 } | |
|
17634
5a32d2a3cc1e
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changeset
|
5279 } |
|
5a32d2a3cc1e
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changeset
|
5280 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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diff
changeset
|
5281 class G1RedirtyLoggedCardsTask : public AbstractGangTask { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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diff
changeset
|
5282 private: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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diff
changeset
|
5283 DirtyCardQueueSet* _queue; |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5284 public: |
|
570cb6369f17
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tschatzl
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diff
changeset
|
5285 G1RedirtyLoggedCardsTask(DirtyCardQueueSet* queue) : AbstractGangTask("Redirty Cards"), _queue(queue) { } |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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diff
changeset
|
5286 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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diff
changeset
|
5287 virtual void work(uint worker_id) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5288 double start_time = os::elapsedTime(); |
|
570cb6369f17
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tschatzl
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20215
diff
changeset
|
5289 |
|
20217
6b52700a896b
8040002: Clean up code and code duplication in re-diryting cards for verification
tschatzl
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20216
diff
changeset
|
5290 RedirtyLoggedCardTableEntryClosure cl; |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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|
5291 if (G1CollectedHeap::heap()->use_parallel_gc_threads()) { |
|
570cb6369f17
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changeset
|
5292 _queue->par_apply_closure_to_all_completed_buffers(&cl); |
|
570cb6369f17
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tschatzl
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|
5293 } else { |
|
570cb6369f17
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changeset
|
5294 _queue->apply_closure_to_all_completed_buffers(&cl); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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|
5295 } |
|
570cb6369f17
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diff
changeset
|
5296 |
|
570cb6369f17
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tschatzl
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diff
changeset
|
5297 G1GCPhaseTimes* timer = G1CollectedHeap::heap()->g1_policy()->phase_times(); |
|
570cb6369f17
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tschatzl
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changeset
|
5298 timer->record_redirty_logged_cards_time_ms(worker_id, (os::elapsedTime() - start_time) * 1000.0); |
|
570cb6369f17
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tschatzl
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changeset
|
5299 timer->record_redirty_logged_cards_processed_cards(worker_id, cl.num_processed()); |
|
570cb6369f17
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changeset
|
5300 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
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17755
diff
changeset
|
5301 }; |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5302 |
|
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5303 void G1CollectedHeap::redirty_logged_cards() { |
|
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5304 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
|
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5305 double redirty_logged_cards_start = os::elapsedTime(); |
|
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5306 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5307 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5308 _g1h->workers()->active_workers() : 1); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5309 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5310 G1RedirtyLoggedCardsTask redirty_task(&dirty_card_queue_set()); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5311 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
|
5312 if (use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5313 set_par_threads(n_workers); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5314 workers()->run_task(&redirty_task); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
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diff
changeset
|
5315 set_par_threads(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5316 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5317 redirty_task.work(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5318 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5319 |
|
a07bea31ef35
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tschatzl
parents:
17755
diff
changeset
|
5320 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5321 dcq.merge_bufferlists(&dirty_card_queue_set()); |
|
a07bea31ef35
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tschatzl
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changeset
|
5322 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5323 |
|
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5324 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
|
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5325 } |
|
a07bea31ef35
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tschatzl
parents:
17755
diff
changeset
|
5326 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5327 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5328 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5329 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5330 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5331 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5332 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5333 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5334 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5335 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5336 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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changeset
|
5337 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5338 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5339 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5340 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5341 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5342 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5343 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5345 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5354 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5355 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5356 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5357 void do_oop( oop* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5358 oop obj = *p; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5359 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5360 if (_g1->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5361 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5362 *p = obj->forwardee(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5363 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5364 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5365 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5366 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5367 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5368 // serial and parallel code as long as different worker |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5369 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5372 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5373 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5374 OopClosure* _copy_non_heap_obj_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5375 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5377 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5378 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5379 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5380 OopClosure* non_heap_obj_cl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5381 OopsInHeapRegionClosure* metadata_obj_cl, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5382 G1ParScanThreadState* pss): |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5383 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5385 _copy_metadata_obj_cl(metadata_obj_cl), |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5386 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5387 {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5388 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5391 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 template <class T> void do_oop_work(T* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5394 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 if (_g1h->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5396 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 // to a new location or to itself in the event of an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5399 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5400 // heap, update the RSet for the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5402 // If the referent has not been forwarded then we have to keep |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5403 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5404 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5405 // If the reference field is in the G1 heap then we can push |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5406 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5407 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5408 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5409 // 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
|
5410 // use the the non-heap or metadata closures directly to copy |
| 10405 | 5411 // the referent object and update the pointer, while avoiding |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5412 // updating the RSet. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5413 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5414 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5415 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5416 } else { |
|
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17866
diff
changeset
|
5417 assert(!Metaspace::contains((const void*)p), |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5418 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5419 PTR_FORMAT, p)); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5420 _copy_non_heap_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5421 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5422 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5424 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5425 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5426 // Serial drain queue closure. Called as the 'complete_gc' |
|
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parents:
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diff
changeset
|
5427 // closure for each discovered list in some of the |
|
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parents:
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diff
changeset
|
5428 // reference processing phases. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5429 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5430 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5431 protected: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5432 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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parents:
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|
5433 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
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parents:
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|
5434 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5435 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5436 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5437 public: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5438 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5439 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5440 _par_scan_state(pss) |
|
4dfb2df418f2
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parents:
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diff
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|
5441 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5442 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5443 void do_void() { |
|
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parents:
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diff
changeset
|
5444 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
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parents:
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diff
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|
5445 pss->trim_queue(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5446 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5447 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5448 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5449 // Parallel Reference Processing closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5450 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5451 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5452 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5453 |
|
4dfb2df418f2
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parents:
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diff
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|
5454 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
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parents:
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|
5455 private: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5456 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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parents:
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|
5457 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
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diff
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|
5458 FlexibleWorkGang* _workers; |
|
3979
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parents:
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|
5459 int _active_workers; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5460 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5461 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5462 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
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diff
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|
5463 FlexibleWorkGang* workers, |
|
3979
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parents:
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|
5464 RefToScanQueueSet *task_queues, |
|
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parents:
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|
5465 int n_workers) : |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5466 _g1h(g1h), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5467 _queues(task_queues), |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5468 _workers(workers), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5469 _active_workers(n_workers) |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5470 { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5471 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
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parents:
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diff
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|
5472 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5473 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5474 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5475 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5476 virtual void execute(EnqueueTask& task); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5477 }; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5478 |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5479 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5480 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5481 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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parents:
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diff
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|
5482 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5483 ProcessTask& _proc_task; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5484 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5485 RefToScanQueueSet *_task_queues; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5486 ParallelTaskTerminator* _terminator; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5487 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5488 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5489 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5490 G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5491 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
5492 ParallelTaskTerminator* terminator) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5493 AbstractGangTask("Process reference objects in parallel"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5494 _proc_task(proc_task), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5495 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5496 _task_queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5497 _terminator(terminator) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5498 {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5499 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5500 virtual void work(uint worker_id) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5501 // The reference processing task executed by a single worker. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5502 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5503 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5504 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5505 G1STWIsAliveClosure is_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5506 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5507 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5508 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5509 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5510 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5511 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5512 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5513 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5514 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5515 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5516 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5517 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5518 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5519 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5520 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5521 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5522 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5523 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5524 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5525 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5526 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5527 // Keep alive closure. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5528 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5529 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5530 // Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5531 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5532 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5533 // Call the reference processing task's work routine. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5534 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5535 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5536 // Note we cannot assert that the refs array is empty here as not all |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5537 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5538 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5539 // the queue may not be empty. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5540 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5541 }; |
|
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 // Driver routine for parallel reference processing. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5544 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5545 // task and has the worker threads execute it. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5546 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5547 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5548 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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|
5549 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
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|
5550 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
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|
5551 |
|
4dfb2df418f2
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diff
changeset
|
5552 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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changeset
|
5553 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
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changeset
|
5554 _g1h->set_par_threads(0); |
|
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parents:
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|
5555 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5556 |
|
4dfb2df418f2
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changeset
|
5557 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
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changeset
|
5558 |
|
4dfb2df418f2
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changeset
|
5559 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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|
5560 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
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|
5561 EnqueueTask& _enq_task; |
|
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changeset
|
5562 |
|
4dfb2df418f2
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changeset
|
5563 public: |
|
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parents:
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|
5564 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
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|
5565 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
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|
5566 _enq_task(enq_task) |
|
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|
5567 { } |
|
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|
5568 |
|
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|
5569 virtual void work(uint worker_id) { |
|
441e946dc1af
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jmasa
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|
5570 _enq_task.work(worker_id); |
|
3979
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|
5571 } |
|
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|
5572 }; |
|
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changeset
|
5573 |
| 10405 | 5574 // Driver routine for parallel reference enqueueing. |
|
3979
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|
5575 // Creates an instance of the ref enqueueing gang |
|
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|
5576 // task and has the worker threads execute it. |
|
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changeset
|
5577 |
|
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|
5578 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
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|
5579 assert(_workers != NULL, "Need parallel worker threads."); |
|
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changeset
|
5580 |
|
4dfb2df418f2
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changeset
|
5581 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
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changeset
|
5582 |
|
4dfb2df418f2
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changeset
|
5583 _g1h->set_par_threads(_active_workers); |
|
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|
5584 _workers->run_task(&enq_task_proxy); |
|
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|
5585 _g1h->set_par_threads(0); |
|
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parents:
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|
5586 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5587 |
|
4dfb2df418f2
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parents:
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changeset
|
5588 // End of weak reference support closures |
|
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parents:
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diff
changeset
|
5589 |
|
4dfb2df418f2
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parents:
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|
5590 // Abstract task used to preserve (i.e. copy) any referent objects |
|
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|
5591 // that are in the collection set and are pointed to by reference |
|
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parents:
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|
5592 // objects discovered by the CM ref processor. |
|
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parents:
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changeset
|
5593 |
|
4dfb2df418f2
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|
5594 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
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parents:
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|
5595 protected: |
|
4dfb2df418f2
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diff
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|
5596 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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|
5597 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
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changeset
|
5598 ParallelTaskTerminator _terminator; |
|
4728
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|
5599 uint _n_workers; |
|
3979
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|
5600 |
|
4dfb2df418f2
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diff
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|
5601 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5602 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
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parents:
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changeset
|
5603 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5604 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5605 _queues(task_queues), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5606 _terminator(workers, _queues), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5607 _n_workers(workers) |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5608 { } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5609 |
|
4728
441e946dc1af
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parents:
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|
5610 void work(uint worker_id) { |
|
3979
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parents:
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diff
changeset
|
5611 ResourceMark rm; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5612 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5613 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5614 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5615 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5616 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5617 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5618 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5619 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5620 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5621 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5622 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5623 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5624 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5625 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5626 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5627 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5628 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5629 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5630 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5631 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5632 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5633 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5634 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5635 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5636 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5637 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5638 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5639 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5640 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5641 // to be copied. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5642 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5643 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5644 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5645 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5646 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
|
5647 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5648 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5649 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5650 // So this must be true - but assert just in case someone decides to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5651 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5652 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5653 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5654 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5655 // 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
|
5656 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5657 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5658 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5659 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5660 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5661 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5662 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5663 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5665 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5666 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5667 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5668 iter.make_referent_alive(); |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5669 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5670 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5671 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5672 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5673 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5674 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5675 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5676 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5677 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5678 assert(pss.refs()->is_empty(), "should be"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5679 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5680 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5681 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5682 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5683 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5684 double ref_proc_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5685 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5686 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5687 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5688 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5689 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5690 // by the CM ref processor should have already been copied (either by |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5691 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5692 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5693 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5694 // 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
|
5695 // 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
|
5696 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5697 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5698 // but would not have treated the reference object as a regular oop. |
| 10405 | 5699 // As a result the copy closure would not have been applied to the |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5700 // referent object. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5701 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5702 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5703 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5705 // 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
|
5706 // 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
|
5707 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 |
| 4711 | 5710 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5711 no_of_gc_workers == workers()->active_workers(), |
| 5712 "Need to reset active GC workers"); | |
| 5713 | |
| 5714 set_par_threads(no_of_gc_workers); | |
| 5715 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5716 no_of_gc_workers, | |
| 5717 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5718 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5719 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5721 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5727 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5728 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5729 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5730 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5731 // 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
|
5732 // 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
|
5733 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5735 // Use only a single queue for this PSS. |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5736 G1ParScanThreadState pss(this, 0, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5737 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5738 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5739 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5740 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5741 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5742 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5743 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5744 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5745 assert(pss.refs()->is_empty(), "pre-condition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5746 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5747 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5748 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5749 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5750 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5751 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5752 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5753 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5754 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
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 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5757 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5758 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5759 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5760 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5761 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5762 // Keep alive closure. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5763 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5764 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5765 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5766 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5767 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5768 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5769 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5770 |
| 10405 | 5771 ReferenceProcessorStats stats; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5772 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5773 // Serial reference processing... |
| 10405 | 5774 stats = rp->process_discovered_references(&is_alive, |
| 5775 &keep_alive, | |
| 5776 &drain_queue, | |
| 5777 NULL, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5778 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5779 _gc_tracer_stw->gc_id()); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5780 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5781 // Parallel reference processing |
| 6819 | 5782 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5783 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5784 | |
| 5785 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
| 10405 | 5786 stats = rp->process_discovered_references(&is_alive, |
| 5787 &keep_alive, | |
| 5788 &drain_queue, | |
| 5789 &par_task_executor, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5790 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5791 _gc_tracer_stw->gc_id()); |
| 10405 | 5792 } |
| 5793 | |
| 5794 _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
|
5795 |
|
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5796 // We have completed copying any necessary live referent objects. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5797 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
|
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 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
|
5800 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
|
5801 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5802 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5803 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5804 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5805 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5806 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5807 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5808 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
|
5809 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5810 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5811 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5812 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5813 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5814 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5815 } else { |
| 10405 | 5816 // Parallel reference enqueueing |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5817 |
| 6819 | 5818 assert(no_of_gc_workers == workers()->active_workers(), |
| 5819 "Need to reset active workers"); | |
| 5820 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5821 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5822 | |
| 5823 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
|
5824 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5825 } |
|
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 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5828 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5829 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5830 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5831 // 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
|
5832 // Should we do that here also? We could, but it is a serial operation |
| 10405 | 5833 // and could significantly increase the pause time. |
|
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 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
|
5836 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
|
5837 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5838 |
| 10405 | 5839 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
|
5840 _expand_heap_after_alloc_failure = true; |
| 10405 | 5841 _evacuation_failed = false; |
| 342 | 5842 |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5843 // 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
|
5844 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
|
5845 |
| 342 | 5846 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
|
5847 |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5848 // Disable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5849 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
|
5850 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
|
5851 hot_card_cache->set_use_cache(false); |
| 889 | 5852 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5853 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5854 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5855 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5856 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5857 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5858 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5859 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5860 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5861 "If not dynamic should be using all the workers"); |
| 4711 | 5862 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5863 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5864 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5865 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5866 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5867 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5868 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5869 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5870 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5871 |
| 5872 init_for_evac_failure(NULL); | |
| 5873 | |
| 5874 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
|
5875 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5876 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
|
5877 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5878 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5879 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5880 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5881 StrongRootsScope srs(this); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5882 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5883 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5884 // 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
|
5885 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5886 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5887 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5888 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5889 "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
|
5890 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5891 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5892 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
|
5893 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5894 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5895 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5896 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5897 // 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
|
5898 // 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
|
5899 // 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
|
5900 // 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
|
5901 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5902 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5903 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5904 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
|
5905 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
|
5906 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5907 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5908 (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
|
5909 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
|
5910 |
| 342 | 5911 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5912 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5913 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5914 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5915 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5916 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5917 // not copied during the pause. |
| 6819 | 5918 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5919 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5920 // Weak root processing. |
| 342 | 5921 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5922 G1STWIsAliveClosure is_alive(this); |
| 342 | 5923 G1KeepAliveClosure keep_alive(this); |
| 5924 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 17764 | 5925 if (G1StringDedup::is_enabled()) { |
| 5926 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
| 5927 } | |
| 342 | 5928 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5929 |
| 10405 | 5930 release_gc_alloc_regions(n_workers, evacuation_info); |
| 342 | 5931 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
|
5932 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5933 // 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
|
5934 // 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
|
5935 // 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
|
5936 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
|
5937 hot_card_cache->set_use_cache(true); |
| 342 | 5938 |
| 12080 | 5939 // Migrate the strong code roots attached to each region in |
| 5940 // the collection set. Ideally we would like to do this | |
| 5941 // after we have finished the scanning/evacuation of the | |
| 5942 // strong code roots for a particular heap region. | |
| 5943 migrate_strong_code_roots(); | |
| 5944 | |
|
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5945 purge_code_root_memory(); |
|
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5946 |
| 12080 | 5947 if (g1_policy()->during_initial_mark_pause()) { |
| 5948 // Reset the claim values set during marking the strong code roots | |
| 5949 reset_heap_region_claim_values(); | |
| 5950 } | |
| 5951 | |
| 342 | 5952 finalize_for_evac_failure(); |
| 5953 | |
| 5954 if (evacuation_failed()) { | |
| 5955 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5956 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5957 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5958 // 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
|
5959 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5960 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 5961 } |
| 5962 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5963 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5964 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5965 // this after the card table is cleaned (and verified) as |
| 10405 | 5966 // the act of enqueueing entries on to the pending list |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5967 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5968 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5969 // RSets. |
| 6819 | 5970 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5971 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5972 if (G1DeferredRSUpdate) { |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5973 redirty_logged_cards(); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5974 } |
| 342 | 5975 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5976 } | |
| 5977 | |
| 2152 | 5978 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5979 FreeRegionList* free_list, | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5980 bool par, |
|
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5981 bool locked) { |
| 2152 | 5982 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
| 5983 assert(!hr->is_empty(), "the region should not be empty"); | |
| 5984 assert(free_list != NULL, "pre-condition"); | |
| 5985 | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5986 // 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
|
5987 // 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
|
5988 // (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
|
5989 if (!hr->is_young()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5990 _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
|
5991 } |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5992 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
|
5993 free_list->add_ordered(hr); |
| 2152 | 5994 } |
| 5995 | |
| 5996 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5997 FreeRegionList* free_list, | |
| 5998 bool par) { | |
| 5999 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 6000 assert(free_list != NULL, "pre-condition"); | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6001 |
| 2152 | 6002 size_t hr_capacity = hr->capacity(); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6003 // 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
|
6004 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6005 uint last_index = hr->last_hc_index(); |
| 2152 | 6006 hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6007 free_region(hr, free_list, par); |
| 2152 | 6008 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6009 uint i = hr->hrs_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6010 while (i < last_index) { |
| 3766 | 6011 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6012 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 6013 curr_hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6014 free_region(curr_hr, free_list, par); |
| 2152 | 6015 i += 1; |
| 6016 } | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6017 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6018 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6019 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6020 const HeapRegionSetCount& humongous_regions_removed) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6021 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6022 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6023 _old_set.bulk_remove(old_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6024 _humongous_set.bulk_remove(humongous_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6025 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6026 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6027 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6028 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6029 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6030 assert(list != NULL, "list can't be null"); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6031 if (!list->is_empty()) { |
| 2152 | 6032 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
|
6033 _free_list.add_ordered(list); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6034 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6035 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6036 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6037 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6038 assert(_summary_bytes_used >= bytes, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6039 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
|
6040 _summary_bytes_used, bytes)); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6041 _summary_bytes_used -= bytes; |
| 342 | 6042 } |
| 6043 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6044 class G1ParCleanupCTTask : public AbstractGangTask { |
| 12343 | 6045 G1SATBCardTableModRefBS* _ct_bs; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6046 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6047 HeapRegion* volatile _su_head; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6048 public: |
| 12343 | 6049 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6050 G1CollectedHeap* g1h) : |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6051 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
|
6052 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6053 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6054 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6055 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6056 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6057 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6058 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6059 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6060 |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6061 void clear_cards(HeapRegion* r) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6062 // Cards of the survivors should have already been dirtied. |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6063 if (!r->is_survivor()) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6064 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6065 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6066 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6067 }; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6068 |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6069 #ifndef PRODUCT |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6070 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6071 G1CollectedHeap* _g1h; |
| 12343 | 6072 G1SATBCardTableModRefBS* _ct_bs; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6073 public: |
| 12343 | 6074 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, G1SATBCardTableModRefBS* ct_bs) |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6075 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6076 virtual bool doHeapRegion(HeapRegion* r) { |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6077 if (r->is_survivor()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6078 _g1h->verify_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6079 } else { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6080 _g1h->verify_not_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6081 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6082 return false; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6083 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6084 }; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6085 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6086 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6087 // All of the region should be clean. |
| 12343 | 6088 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6089 MemRegion mr(hr->bottom(), hr->end()); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6090 ct_bs->verify_not_dirty_region(mr); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6091 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6092 |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6093 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6094 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6095 // dirty allocated blocks as they allocate them. The thread that |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6096 // retires each region and replaces it with a new one will do a |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6097 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6098 // not dirty that area (one less thing to have to do while holding |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6099 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6100 // is dirty. |
| 12343 | 6101 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6102 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
|
12835
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6103 if (hr->is_young()) { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6104 ct_bs->verify_g1_young_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6105 } else { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
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diff
changeset
|
6106 ct_bs->verify_dirty_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
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diff
changeset
|
6107 } |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6108 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6109 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6110 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
| 12343 | 6111 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6112 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6113 verify_dirty_region(hr); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6114 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6115 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6116 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6117 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6118 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
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|
6119 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6120 #endif |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6121 |
| 342 | 6122 void G1CollectedHeap::cleanUpCardTable() { |
| 12343 | 6123 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 6124 double start = os::elapsedTime(); |
| 6125 | |
| 4023 | 6126 { |
| 6127 // Iterate over the dirty cards region list. | |
| 6128 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 6129 | |
| 4711 | 6130 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 6131 set_par_threads(); | |
| 4023 | 6132 workers()->run_task(&cleanup_task); |
| 6133 set_par_threads(0); | |
| 6134 } else { | |
| 6135 while (_dirty_cards_region_list) { | |
| 6136 HeapRegion* r = _dirty_cards_region_list; | |
| 6137 cleanup_task.clear_cards(r); | |
| 6138 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 6139 if (_dirty_cards_region_list == r) { | |
| 6140 // The last region. | |
| 6141 _dirty_cards_region_list = NULL; | |
| 6142 } | |
| 6143 r->set_next_dirty_cards_region(NULL); | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6144 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6145 } |
| 4023 | 6146 #ifndef PRODUCT |
| 6147 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 6148 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 6149 heap_region_iterate(&cleanup_verifier); | |
| 6150 } | |
| 6151 #endif | |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
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|
6152 } |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
6153 |
| 342 | 6154 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
|
6155 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 6156 } |
| 6157 | |
| 10405 | 6158 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
| 2152 | 6159 size_t pre_used = 0; |
| 6160 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 6161 | |
| 342 | 6162 double young_time_ms = 0.0; |
| 6163 double non_young_time_ms = 0.0; | |
| 6164 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6165 // Since the collection set is a superset of the the young list, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6166 // all we need to do to clear the young list is clear its |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6167 // head and length, and unlink any young regions in the code below |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6168 _young_list->clear(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6169 |
| 342 | 6170 G1CollectorPolicy* policy = g1_policy(); |
| 6171 | |
| 6172 double start_sec = os::elapsedTime(); | |
| 6173 bool non_young = true; | |
| 6174 | |
| 6175 HeapRegion* cur = cs_head; | |
| 6176 int age_bound = -1; | |
| 6177 size_t rs_lengths = 0; | |
| 6178 | |
| 6179 while (cur != NULL) { | |
| 2361 | 6180 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 6181 if (non_young) { |
| 6182 if (cur->is_young()) { | |
| 6183 double end_sec = os::elapsedTime(); | |
| 6184 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 6185 non_young_time_ms += elapsed_ms; | |
| 6186 | |
| 6187 start_sec = os::elapsedTime(); | |
| 6188 non_young = false; | |
| 6189 } | |
| 6190 } else { | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6191 if (!cur->is_young()) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6192 double end_sec = os::elapsedTime(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6193 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6194 young_time_ms += elapsed_ms; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6195 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6196 start_sec = os::elapsedTime(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6197 non_young = true; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6198 } |
| 342 | 6199 } |
| 6200 | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6201 rs_lengths += cur->rem_set()->occupied_locked(); |
| 342 | 6202 |
| 6203 HeapRegion* next = cur->next_in_collection_set(); | |
| 6204 assert(cur->in_collection_set(), "bad CS"); | |
| 6205 cur->set_next_in_collection_set(NULL); | |
| 6206 cur->set_in_collection_set(false); | |
| 6207 | |
| 6208 if (cur->is_young()) { | |
| 6209 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6210 assert(index != -1, "invariant"); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6211 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 6212 size_t words_survived = _surviving_young_words[index]; |
| 6213 cur->record_surv_words_in_group(words_survived); | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6214 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6215 // At this point the we have 'popped' cur from the collection set |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6216 // (linked via next_in_collection_set()) but it is still in the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6217 // young list (linked via next_young_region()). Clear the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6218 // _next_young_region field. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6219 cur->set_next_young_region(NULL); |
| 342 | 6220 } else { |
| 6221 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6222 assert(index == -1, "invariant"); |
| 342 | 6223 } |
| 6224 | |
| 6225 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 6226 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 6227 "invariant" ); | |
| 6228 | |
| 6229 if (!cur->evacuation_failed()) { | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6230 MemRegion used_mr = cur->used_region(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6231 |
| 342 | 6232 // And the region is empty. |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6233 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6234 pre_used += cur->used(); |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6235 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
| 342 | 6236 } else { |
| 6237 cur->uninstall_surv_rate_group(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6238 if (cur->is_young()) { |
| 342 | 6239 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
|
6240 } |
| 342 | 6241 cur->set_not_young(); |
| 6242 cur->set_evacuation_failed(false); | |
| 4072 | 6243 // The region is now considered to be old. |
| 6244 _old_set.add(cur); | |
| 10405 | 6245 evacuation_info.increment_collectionset_used_after(cur->used()); |
| 342 | 6246 } |
| 6247 cur = next; | |
| 6248 } | |
| 6249 | |
| 10405 | 6250 evacuation_info.set_regions_freed(local_free_list.length()); |
| 342 | 6251 policy->record_max_rs_lengths(rs_lengths); |
| 6252 policy->cset_regions_freed(); | |
| 6253 | |
| 6254 double end_sec = os::elapsedTime(); | |
| 6255 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
|
6256 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6257 if (non_young) { |
| 342 | 6258 non_young_time_ms += elapsed_ms; |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6259 } else { |
| 342 | 6260 young_time_ms += elapsed_ms; |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6261 } |
| 342 | 6262 |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6263 prepend_to_freelist(&local_free_list); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6264 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
|
6265 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
|
6266 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6267 } |
| 6268 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6269 // 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
|
6270 // 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
|
6271 // 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
|
6272 // 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
|
6273 // 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
|
6274 // 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
|
6275 // 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
|
6276 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6277 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
|
6278 HeapRegion* cur = cs_head; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6279 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6280 while (cur != NULL) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6281 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
|
6282 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
|
6283 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
|
6284 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
|
6285 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
|
6286 cur = next; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6287 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6288 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6289 |
| 2152 | 6290 void G1CollectedHeap::set_free_regions_coming() { |
| 6291 if (G1ConcRegionFreeingVerbose) { | |
| 6292 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6293 "setting free regions coming"); | |
| 6294 } | |
| 6295 | |
| 6296 assert(!free_regions_coming(), "pre-condition"); | |
| 6297 _free_regions_coming = true; | |
| 342 | 6298 } |
| 6299 | |
| 2152 | 6300 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6301 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6302 |
| 2152 | 6303 { |
| 6304 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6305 _free_regions_coming = false; | |
| 6306 SecondaryFreeList_lock->notify_all(); | |
| 6307 } | |
| 6308 | |
| 6309 if (G1ConcRegionFreeingVerbose) { | |
| 6310 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6311 "reset free regions coming"); | |
| 342 | 6312 } |
| 6313 } | |
| 6314 | |
| 2152 | 6315 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6316 // Most of the time we won't have to wait, so let's do a quick test | |
| 6317 // first before we take the lock. | |
| 6318 if (!free_regions_coming()) { | |
| 6319 return; | |
| 6320 } | |
| 6321 | |
| 6322 if (G1ConcRegionFreeingVerbose) { | |
| 6323 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6324 "waiting for free regions"); | |
| 342 | 6325 } |
| 6326 | |
| 6327 { | |
| 2152 | 6328 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6329 while (free_regions_coming()) { | |
| 6330 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6331 } |
| 2152 | 6332 } |
| 6333 | |
| 6334 if (G1ConcRegionFreeingVerbose) { | |
| 6335 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6336 "done waiting for free regions"); | |
| 6337 } | |
| 342 | 6338 } |
| 6339 | |
| 6340 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6341 assert(heap_lock_held_for_gc(), | |
| 6342 "the heap lock should already be held by or for this thread"); | |
| 6343 _young_list->push_region(hr); | |
| 6344 } | |
| 6345 | |
| 6346 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6347 private: | |
| 6348 bool _success; | |
| 6349 public: | |
| 6350 NoYoungRegionsClosure() : _success(true) { } | |
| 6351 bool doHeapRegion(HeapRegion* r) { | |
| 6352 if (r->is_young()) { | |
| 6353 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6354 r->bottom(), r->end()); | |
| 6355 _success = false; | |
| 6356 } | |
| 6357 return false; | |
| 6358 } | |
| 6359 bool success() { return _success; } | |
| 6360 }; | |
| 6361 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6362 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
|
6363 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
|
6364 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6365 if (check_heap) { |
| 342 | 6366 NoYoungRegionsClosure closure; |
| 6367 heap_region_iterate(&closure); | |
| 6368 ret = ret && closure.success(); | |
| 6369 } | |
| 6370 | |
| 6371 return ret; | |
| 6372 } | |
| 6373 | |
| 4072 | 6374 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6375 private: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6376 HeapRegionSet *_old_set; |
| 2152 | 6377 |
| 342 | 6378 public: |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6379 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6380 |
| 342 | 6381 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6382 if (r->is_empty()) { |
| 6383 // We ignore empty regions, we'll empty the free list afterwards | |
| 6384 } else if (r->is_young()) { | |
| 6385 // We ignore young regions, we'll empty the young list afterwards | |
| 6386 } else if (r->isHumongous()) { | |
| 6387 // We ignore humongous regions, we're not tearing down the | |
| 6388 // humongous region set | |
| 342 | 6389 } else { |
| 4072 | 6390 // The rest should be old |
| 6391 _old_set->remove(r); | |
| 342 | 6392 } |
| 6393 return false; | |
| 6394 } | |
| 6395 | |
| 4072 | 6396 ~TearDownRegionSetsClosure() { |
| 6397 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6398 } |
| 342 | 6399 }; |
| 6400 | |
| 4072 | 6401 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6402 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6403 | |
| 6404 if (!free_list_only) { | |
| 6405 TearDownRegionSetsClosure cl(&_old_set); | |
| 6406 heap_region_iterate(&cl); | |
| 6407 | |
| 17764 | 6408 // Note that emptying the _young_list is postponed and instead done as |
| 6409 // the first step when rebuilding the regions sets again. The reason for | |
| 6410 // this is that during a full GC string deduplication needs to know if | |
| 6411 // a collected region was young or old when the full GC was initiated. | |
| 4072 | 6412 } |
| 6413 _free_list.remove_all(); | |
| 6414 } | |
| 6415 | |
| 6416 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6417 private: | |
| 6418 bool _free_list_only; | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6419 HeapRegionSet* _old_set; |
| 4072 | 6420 FreeRegionList* _free_list; |
| 6421 size_t _total_used; | |
| 6422 | |
| 6423 public: | |
| 6424 RebuildRegionSetsClosure(bool free_list_only, | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6425 HeapRegionSet* old_set, FreeRegionList* free_list) : |
| 4072 | 6426 _free_list_only(free_list_only), |
| 6427 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 6428 assert(_free_list->is_empty(), "pre-condition"); | |
| 6429 if (!free_list_only) { | |
| 6430 assert(_old_set->is_empty(), "pre-condition"); | |
| 6431 } | |
| 6432 } | |
| 6433 | |
| 6434 bool doHeapRegion(HeapRegion* r) { | |
| 6435 if (r->continuesHumongous()) { | |
| 6436 return false; | |
| 6437 } | |
| 6438 | |
| 6439 if (r->is_empty()) { | |
| 6440 // Add free regions to the free list | |
| 6441 _free_list->add_as_tail(r); | |
| 6442 } else if (!_free_list_only) { | |
| 6443 assert(!r->is_young(), "we should not come across young regions"); | |
| 6444 | |
| 6445 if (r->isHumongous()) { | |
| 6446 // We ignore humongous regions, we left the humongous set unchanged | |
| 6447 } else { | |
| 6448 // The rest should be old, add them to the old set | |
| 6449 _old_set->add(r); | |
| 6450 } | |
| 6451 _total_used += r->used(); | |
| 6452 } | |
| 6453 | |
| 6454 return false; | |
| 6455 } | |
| 6456 | |
| 6457 size_t total_used() { | |
| 6458 return _total_used; | |
| 6459 } | |
| 6460 }; | |
| 6461 | |
| 6462 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6463 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6464 | |
| 17764 | 6465 if (!free_list_only) { |
| 6466 _young_list->empty_list(); | |
| 6467 } | |
| 6468 | |
| 4072 | 6469 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); |
| 6470 heap_region_iterate(&cl); | |
| 6471 | |
| 6472 if (!free_list_only) { | |
| 6473 _summary_bytes_used = cl.total_used(); | |
| 6474 } | |
| 6475 assert(_summary_bytes_used == recalculate_used(), | |
| 6476 err_msg("inconsistent _summary_bytes_used, " | |
| 6477 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 6478 _summary_bytes_used, recalculate_used())); | |
| 342 | 6479 } |
| 6480 | |
| 6481 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6482 _refine_cte_cl->set_concurrent(concurrent); | |
| 6483 } | |
| 6484 | |
| 6485 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6486 HeapRegion* hr = heap_region_containing(p); | |
| 6487 if (hr == NULL) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
6488 return false; |
| 342 | 6489 } else { |
| 6490 return hr->is_in(p); | |
| 6491 } | |
| 6492 } | |
| 2152 | 6493 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6494 // 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
|
6495 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6496 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
|
6497 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6498 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
|
6499 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6500 "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
|
6501 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
|
6502 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6503 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
|
6504 false /* is_old */, |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6505 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6506 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6507 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6508 _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
|
6509 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6510 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6511 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6512 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6513 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6514 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6515 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
|
6516 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6517 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
|
6518 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
|
6519 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6520 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
|
6521 _summary_bytes_used += allocated_bytes; |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6522 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6523 // 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
|
6524 // 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
|
6525 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6526 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6527 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6528 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6529 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
|
6530 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6531 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
|
6532 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6533 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6534 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6535 // 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
|
6536 // in the workgroup. |
| 4711 | 6537 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
|
6538 uint n_workers = workers()->active_workers(); |
| 4711 | 6539 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6540 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6541 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6542 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6543 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
|
6544 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6545 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6546 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6547 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6548 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6549 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6550 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6551 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6552 _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
|
6553 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6554 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6555 // 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
|
6556 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6557 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
|
6558 uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6559 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6560 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
|
6561 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6562 if (count < g1_policy()->max_regions(ap)) { |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6563 bool survivor = (ap == GCAllocForSurvived); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6564 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
|
6565 !survivor, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6566 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6567 if (new_alloc_region != NULL) { |
|
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|
6568 // We really only need to do this for old regions given that we |
|
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|
6569 // should never scan survivors. But it doesn't hurt to do it |
|
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|
6570 // for survivors too. |
|
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|
6571 new_alloc_region->set_saved_mark(); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
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|
6572 if (survivor) { |
|
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|
6573 new_alloc_region->set_survivor(); |
|
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|
6574 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
|
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|
6575 } else { |
|
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|
6576 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
|
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|
6577 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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|
6578 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
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|
6579 new_alloc_region->note_start_of_copying(during_im); |
|
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|
6580 return new_alloc_region; |
|
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|
6581 } else { |
|
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|
6582 g1_policy()->note_alloc_region_limit_reached(ap); |
|
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|
6583 } |
|
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|
6584 } |
|
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|
6585 return NULL; |
|
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|
6586 } |
|
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|
6587 |
|
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|
6588 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
|
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|
6589 size_t allocated_bytes, |
|
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|
6590 GCAllocPurpose ap) { |
|
4787
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|
6591 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
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|
6592 alloc_region->note_end_of_copying(during_im); |
|
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|
6593 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
|
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|
6594 if (ap == GCAllocForSurvived) { |
|
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|
6595 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6596 } else { |
| 6597 _old_set.add(alloc_region); | |
|
3830
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|
6598 } |
|
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|
6599 _hr_printer.retire(alloc_region); |
|
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|
6600 } |
|
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|
6601 |
|
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|
6602 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
|
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|
6603 bool force) { |
|
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|
6604 assert(!force, "not supported for GC alloc regions"); |
|
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|
6605 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
|
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|
6606 } |
|
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|
6607 |
|
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|
6608 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
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|
6609 size_t allocated_bytes) { |
|
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|
6610 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
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|
6611 GCAllocForSurvived); |
|
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|
6612 } |
|
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|
6613 |
|
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|
6614 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
|
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|
6615 bool force) { |
|
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|
6616 assert(!force, "not supported for GC alloc regions"); |
|
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|
6617 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
|
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|
6618 } |
|
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|
6619 |
|
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|
6620 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
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|
6621 size_t allocated_bytes) { |
|
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|
6622 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
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|
6623 GCAllocForTenured); |
|
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|
6624 } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6625 // Heap region set verification |
|
abdfc822206f
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diff
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|
6626 |
| 2152 | 6627 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6628 private: | |
|
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|
6629 HeapRegionSet* _old_set; |
|
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|
6630 HeapRegionSet* _humongous_set; |
|
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|
6631 FreeRegionList* _free_list; |
| 2152 | 6632 |
| 6633 public: | |
|
17736
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|
6634 HeapRegionSetCount _old_count; |
|
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|
6635 HeapRegionSetCount _humongous_count; |
|
58fc1b1523dc
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|
6636 HeapRegionSetCount _free_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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diff
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|
6637 |
|
58fc1b1523dc
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|
6638 VerifyRegionListsClosure(HeapRegionSet* old_set, |
|
58fc1b1523dc
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brutisso
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|
6639 HeapRegionSet* humongous_set, |
| 2152 | 6640 FreeRegionList* free_list) : |
|
17736
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|
6641 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
|
58fc1b1523dc
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|
6642 _old_count(), _humongous_count(), _free_count(){ } |
| 2152 | 6643 |
| 6644 bool doHeapRegion(HeapRegion* hr) { | |
| 6645 if (hr->continuesHumongous()) { | |
| 6646 return false; | |
| 6647 } | |
| 6648 | |
| 6649 if (hr->is_young()) { | |
| 6650 // TODO | |
| 6651 } else if (hr->startsHumongous()) { | |
|
17736
58fc1b1523dc
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brutisso
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diff
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|
6652 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->region_num())); |
|
58fc1b1523dc
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diff
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|
6653 _humongous_count.increment(1u, hr->capacity()); |
| 2152 | 6654 } else if (hr->is_empty()) { |
|
17736
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|
6655 assert(hr->containing_set() == _free_list, err_msg("Heap region %u is empty but not on the free list.", hr->region_num())); |
|
58fc1b1523dc
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|
6656 _free_count.increment(1u, hr->capacity()); |
| 4072 | 6657 } else { |
|
17736
58fc1b1523dc
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diff
changeset
|
6658 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->region_num())); |
|
58fc1b1523dc
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|
6659 _old_count.increment(1u, hr->capacity()); |
| 2152 | 6660 } |
| 6661 return false; | |
| 6662 } | |
|
17736
58fc1b1523dc
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brutisso
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diff
changeset
|
6663 |
|
58fc1b1523dc
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diff
changeset
|
6664 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
|
58fc1b1523dc
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|
6665 guarantee(old_set->length() == _old_count.length(), err_msg("Old set count mismatch. Expected %u, actual %u.", old_set->length(), _old_count.length())); |
|
58fc1b1523dc
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|
6666 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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|
6667 old_set->total_capacity_bytes(), _old_count.capacity())); |
|
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|
6668 |
|
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|
6669 guarantee(humongous_set->length() == _humongous_count.length(), err_msg("Hum set count mismatch. Expected %u, actual %u.", humongous_set->length(), _humongous_count.length())); |
|
58fc1b1523dc
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|
6670 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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|
6671 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
|
58fc1b1523dc
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brutisso
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changeset
|
6672 |
|
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|
6673 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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|
6674 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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|
6675 free_list->total_capacity_bytes(), _free_count.capacity())); |
|
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|
6676 } |
| 2152 | 6677 }; |
| 6678 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6679 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
| 3766 | 6680 HeapWord* bottom) { |
| 6681 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6682 MemRegion mr(bottom, end); | |
| 6683 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6684 // This might return NULL if the allocation fails | |
|
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6752
diff
changeset
|
6685 return new HeapRegion(hrs_index, _bot_shared, mr); |
| 3766 | 6686 } |
| 6687 | |
| 2152 | 6688 void G1CollectedHeap::verify_region_sets() { |
| 6689 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6690 | |
| 6691 // First, check the explicit lists. | |
|
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|
6692 _free_list.verify_list(); |
| 2152 | 6693 { |
| 6694 // Given that a concurrent operation might be adding regions to | |
| 6695 // the secondary free list we have to take the lock before | |
| 6696 // verifying it. | |
| 6697 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
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|
6698 _secondary_free_list.verify_list(); |
|
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|
6699 } |
| 2152 | 6700 |
| 6701 // If a concurrent region freeing operation is in progress it will | |
| 6702 // be difficult to correctly attributed any free regions we come | |
| 6703 // across to the correct free list given that they might belong to | |
| 6704 // one of several (free_list, secondary_free_list, any local lists, | |
| 6705 // etc.). So, if that's the case we will skip the rest of the | |
| 6706 // verification operation. Alternatively, waiting for the concurrent | |
| 6707 // operation to complete will have a non-trivial effect on the GC's | |
| 6708 // operation (no concurrent operation will last longer than the | |
| 6709 // interval between two calls to verification) and it might hide | |
| 6710 // any issues that we would like to catch during testing. | |
| 6711 if (free_regions_coming()) { | |
| 6712 return; | |
| 6713 } | |
| 6714 | |
| 2361 | 6715 // Make sure we append the secondary_free_list on the free_list so |
| 6716 // that all free regions we will come across can be safely | |
| 6717 // attributed to the free_list. | |
| 6718 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6719 |
| 6720 // Finally, make sure that the region accounting in the lists is | |
| 6721 // consistent with what we see in the heap. | |
| 6722 | |
| 4072 | 6723 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6724 heap_region_iterate(&cl); |
|
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changeset
|
6725 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
| 342 | 6726 } |
| 12080 | 6727 |
| 6728 // Optimized nmethod scanning | |
| 6729 | |
| 6730 class RegisterNMethodOopClosure: public OopClosure { | |
| 6731 G1CollectedHeap* _g1h; | |
| 6732 nmethod* _nm; | |
| 6733 | |
| 6734 template <class T> void do_oop_work(T* p) { | |
| 6735 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6736 if (!oopDesc::is_null(heap_oop)) { | |
| 6737 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6738 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
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6739 assert(!hr->continuesHumongous(), |
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6740 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
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6741 " starting at "HR_FORMAT, |
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6742 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
| 12080 | 6743 |
| 6744 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
| 6745 // entries but having duplicates is OK since we "mark" nmethods | |
| 6746 // as visited when we scan the strong code root lists during the GC. | |
| 6747 hr->add_strong_code_root(_nm); | |
|
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6748 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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6749 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
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|
6750 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6751 } |
| 6752 } | |
| 6753 | |
| 6754 public: | |
| 6755 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6756 _g1h(g1h), _nm(nm) {} | |
| 6757 | |
| 6758 void do_oop(oop* p) { do_oop_work(p); } | |
| 6759 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6760 }; | |
| 6761 | |
| 6762 class UnregisterNMethodOopClosure: public OopClosure { | |
| 6763 G1CollectedHeap* _g1h; | |
| 6764 nmethod* _nm; | |
| 6765 | |
| 6766 template <class T> void do_oop_work(T* p) { | |
| 6767 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6768 if (!oopDesc::is_null(heap_oop)) { | |
| 6769 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6770 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
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6771 assert(!hr->continuesHumongous(), |
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6772 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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6773 " starting at "HR_FORMAT, |
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6774 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
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6775 |
| 12080 | 6776 hr->remove_strong_code_root(_nm); |
|
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6777 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
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6778 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
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|
6779 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6780 } |
| 6781 } | |
| 6782 | |
| 6783 public: | |
| 6784 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6785 _g1h(g1h), _nm(nm) {} | |
| 6786 | |
| 6787 void do_oop(oop* p) { do_oop_work(p); } | |
| 6788 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6789 }; | |
| 6790 | |
| 6791 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
| 6792 CollectedHeap::register_nmethod(nm); | |
| 6793 | |
| 6794 guarantee(nm != NULL, "sanity"); | |
| 6795 RegisterNMethodOopClosure reg_cl(this, nm); | |
| 6796 nm->oops_do(®_cl); | |
| 6797 } | |
| 6798 | |
| 6799 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
| 6800 CollectedHeap::unregister_nmethod(nm); | |
| 6801 | |
| 6802 guarantee(nm != NULL, "sanity"); | |
| 6803 UnregisterNMethodOopClosure reg_cl(this, nm); | |
| 6804 nm->oops_do(®_cl, true); | |
| 6805 } | |
| 6806 | |
| 6807 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
| 6808 public: | |
| 6809 bool doHeapRegion(HeapRegion *hr) { | |
|
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|
6810 assert(!hr->isHumongous(), |
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|
6811 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
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|
6812 HR_FORMAT_PARAMS(hr))); |
| 12080 | 6813 hr->migrate_strong_code_roots(); |
| 6814 return false; | |
| 6815 } | |
| 6816 }; | |
| 6817 | |
| 6818 void G1CollectedHeap::migrate_strong_code_roots() { | |
| 6819 MigrateCodeRootsHeapRegionClosure cl; | |
| 6820 double migrate_start = os::elapsedTime(); | |
| 6821 collection_set_iterate(&cl); | |
| 6822 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
| 6823 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
| 6824 } | |
| 6825 | |
|
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6826 void G1CollectedHeap::purge_code_root_memory() { |
|
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|
6827 double purge_start = os::elapsedTime(); |
|
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|
6828 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
|
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6829 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
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6830 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
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6831 } |
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6832 |
| 12080 | 6833 // Mark all the code roots that point into regions *not* in the |
| 6834 // collection set. | |
| 6835 // | |
| 6836 // Note we do not want to use a "marking" CodeBlobToOopClosure while | |
| 6837 // walking the the code roots lists of regions not in the collection | |
| 6838 // set. Suppose we have an nmethod (M) that points to objects in two | |
| 6839 // separate regions - one in the collection set (R1) and one not (R2). | |
| 6840 // Using a "marking" CodeBlobToOopClosure here would result in "marking" | |
| 6841 // nmethod M when walking the code roots for R1. When we come to scan | |
| 6842 // the code roots for R2, we would see that M is already marked and it | |
| 6843 // would be skipped and the objects in R2 that are referenced from M | |
| 6844 // would not be evacuated. | |
| 6845 | |
| 6846 class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { | |
| 6847 | |
| 6848 class MarkStrongCodeRootOopClosure: public OopClosure { | |
| 6849 ConcurrentMark* _cm; | |
| 6850 HeapRegion* _hr; | |
| 6851 uint _worker_id; | |
| 6852 | |
| 6853 template <class T> void do_oop_work(T* p) { | |
| 6854 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6855 if (!oopDesc::is_null(heap_oop)) { | |
| 6856 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6857 // Only mark objects in the region (which is assumed | |
| 6858 // to be not in the collection set). | |
| 6859 if (_hr->is_in(obj)) { | |
| 6860 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); | |
| 6861 } | |
| 6862 } | |
| 6863 } | |
| 6864 | |
| 6865 public: | |
| 6866 MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : | |
| 6867 _cm(cm), _hr(hr), _worker_id(worker_id) { | |
| 6868 assert(!_hr->in_collection_set(), "sanity"); | |
| 6869 } | |
| 6870 | |
| 6871 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6872 void do_oop(oop* p) { do_oop_work(p); } | |
| 6873 }; | |
| 6874 | |
| 6875 MarkStrongCodeRootOopClosure _oop_cl; | |
| 6876 | |
| 6877 public: | |
| 6878 MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): | |
| 6879 _oop_cl(cm, hr, worker_id) {} | |
| 6880 | |
| 6881 void do_code_blob(CodeBlob* cb) { | |
| 6882 nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); | |
| 6883 if (nm != NULL) { | |
| 6884 nm->oops_do(&_oop_cl); | |
| 6885 } | |
| 6886 } | |
| 6887 }; | |
| 6888 | |
| 6889 class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { | |
| 6890 G1CollectedHeap* _g1h; | |
| 6891 uint _worker_id; | |
| 6892 | |
| 6893 public: | |
| 6894 MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : | |
| 6895 _g1h(g1h), _worker_id(worker_id) {} | |
| 6896 | |
| 6897 bool doHeapRegion(HeapRegion *hr) { | |
| 6898 HeapRegionRemSet* hrrs = hr->rem_set(); | |
|
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|
6899 if (hr->continuesHumongous()) { |
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6900 // Code roots should never be attached to a continuation of a humongous region |
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|
6901 assert(hrrs->strong_code_roots_list_length() == 0, |
|
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|
6902 err_msg("code roots should never be attached to continuations of humongous region "HR_FORMAT |
|
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|
6903 " starting at "HR_FORMAT", but has "SIZE_FORMAT, |
|
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|
6904 HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()), |
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|
6905 hrrs->strong_code_roots_list_length())); |
| 12080 | 6906 return false; |
| 6907 } | |
| 6908 | |
| 6909 if (hr->in_collection_set()) { | |
| 6910 // Don't mark code roots into regions in the collection set here. | |
| 6911 // They will be marked when we scan them. | |
| 6912 return false; | |
| 6913 } | |
| 6914 | |
| 6915 MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); | |
| 6916 hr->strong_code_roots_do(&cb_cl); | |
| 6917 return false; | |
| 6918 } | |
| 6919 }; | |
| 6920 | |
| 6921 void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { | |
| 6922 MarkStrongCodeRootsHRClosure cl(this, worker_id); | |
|
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|
6923 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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brutisso
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|
6924 heap_region_par_iterate_chunked(&cl, |
|
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|
6925 worker_id, |
|
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|
6926 workers()->active_workers(), |
|
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|
6927 HeapRegion::ParMarkRootClaimValue); |
|
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|
6928 } else { |
|
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|
6929 heap_region_iterate(&cl); |
|
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|
6930 } |
| 12080 | 6931 } |
| 6932 | |
| 6933 class RebuildStrongCodeRootClosure: public CodeBlobClosure { | |
| 6934 G1CollectedHeap* _g1h; | |
| 6935 | |
| 6936 public: | |
| 6937 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
| 6938 _g1h(g1h) {} | |
| 6939 | |
| 6940 void do_code_blob(CodeBlob* cb) { | |
| 6941 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
| 6942 if (nm == NULL) { | |
| 6943 return; | |
| 6944 } | |
| 6945 | |
|
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|
6946 if (ScavengeRootsInCode) { |
| 12080 | 6947 _g1h->register_nmethod(nm); |
| 6948 } | |
| 6949 } | |
| 6950 }; | |
| 6951 | |
| 6952 void G1CollectedHeap::rebuild_strong_code_roots() { | |
| 6953 RebuildStrongCodeRootClosure blob_cl(this); | |
| 6954 CodeCache::blobs_do(&blob_cl); | |
| 6955 } |