Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20504:6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
Summary: Remove -XX:-G1DeferredRSUpdate functionality as it is racy. During evacuation failure handling, threads where evacuation failure handling occurred may try to add remembered sets to regions which remembered sets are currently being scanned. The iterator to handle the remembered set scan does not support addition of entries during scan and so may skip valid references.
Reviewed-by: iveresov, brutisso, mgerdin
| author | tschatzl |
|---|---|
| date | Tue, 30 Sep 2014 09:44:36 +0200 |
| parents | fa56205f142c |
| children | d3fd73295885 |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
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25 #if !defined(__clang_major__) && defined(__GNUC__) |
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26 #define ATTRIBUTE_PRINTF(x,y) // FIXME, formats are a mess. |
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27 #endif |
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28 |
| 1972 | 29 #include "precompiled.hpp" |
| 12080 | 30 #include "code/codeCache.hpp" |
| 1972 | 31 #include "code/icBuffer.hpp" |
| 32 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
| 33 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
| 34 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
| 35 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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36 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
| 1972 | 37 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 38 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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39 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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40 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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41 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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42 #include "gc_implementation/g1/g1Log.hpp" |
| 1972 | 43 #include "gc_implementation/g1/g1MarkSweep.hpp" |
| 44 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
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45 #include "gc_implementation/g1/g1ParScanThreadState.inline.hpp" |
| 20337 | 46 #include "gc_implementation/g1/g1RegionToSpaceMapper.hpp" |
| 1972 | 47 #include "gc_implementation/g1/g1RemSet.inline.hpp" |
| 17764 | 48 #include "gc_implementation/g1/g1StringDedup.hpp" |
| 10405 | 49 #include "gc_implementation/g1/g1YCTypes.hpp" |
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50 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 51 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
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52 #include "gc_implementation/g1/heapRegionSet.inline.hpp" |
| 1972 | 53 #include "gc_implementation/g1/vm_operations_g1.hpp" |
| 10405 | 54 #include "gc_implementation/shared/gcHeapSummary.hpp" |
| 55 #include "gc_implementation/shared/gcTimer.hpp" | |
| 56 #include "gc_implementation/shared/gcTrace.hpp" | |
| 57 #include "gc_implementation/shared/gcTraceTime.hpp" | |
| 1972 | 58 #include "gc_implementation/shared/isGCActiveMark.hpp" |
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59 #include "memory/allocation.hpp" |
| 1972 | 60 #include "memory/gcLocker.inline.hpp" |
| 61 #include "memory/generationSpec.hpp" | |
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62 #include "memory/iterator.hpp" |
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63 #include "memory/referenceProcessor.hpp" |
| 1972 | 64 #include "oops/oop.inline.hpp" |
| 65 #include "oops/oop.pcgc.inline.hpp" | |
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66 #include "runtime/orderAccess.inline.hpp" |
| 1972 | 67 #include "runtime/vmThread.hpp" |
| 342 | 68 |
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69 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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70 |
| 342 | 71 // turn it on so that the contents of the young list (scan-only / |
| 72 // to-be-collected) are printed at "strategic" points before / during | |
| 73 // / after the collection --- this is useful for debugging | |
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74 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 75 // CURRENT STATUS |
| 76 // This file is under construction. Search for "FIXME". | |
| 77 | |
| 78 // INVARIANTS/NOTES | |
| 79 // | |
| 80 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 81 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 82 // and allocate_new_tlab, which are the "entry" points to the | |
| 83 // allocation code from the rest of the JVM. (Note that this does not | |
| 84 // apply to TLAB allocation, which is not part of this interface: it | |
| 85 // is done by clients of this interface.) | |
| 342 | 86 |
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87 // Notes on implementation of parallelism in different tasks. |
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88 // |
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89 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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90 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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91 // It does use run_task() which sets _n_workers in the task. |
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92 // G1ParTask executes g1_process_roots() -> |
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93 // SharedHeap::process_roots() which calls eventually to |
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94 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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95 // SequentialSubTasksDone. SharedHeap::process_roots() also |
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96 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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97 // |
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98 |
| 342 | 99 // Local to this file. |
| 100 | |
| 101 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 102 bool _concurrent; | |
| 103 public: | |
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104 RefineCardTableEntryClosure() : _concurrent(true) { } |
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105 |
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106 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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107 bool oops_into_cset = G1CollectedHeap::heap()->g1_rem_set()->refine_card(card_ptr, worker_i, false); |
| 1705 | 108 // This path is executed by the concurrent refine or mutator threads, |
| 109 // concurrently, and so we do not care if card_ptr contains references | |
| 110 // that point into the collection set. | |
| 111 assert(!oops_into_cset, "should be"); | |
| 112 | |
| 20192 | 113 if (_concurrent && SuspendibleThreadSet::should_yield()) { |
| 342 | 114 // Caller will actually yield. |
| 115 return false; | |
| 116 } | |
| 117 // Otherwise, we finished successfully; return true. | |
| 118 return true; | |
| 119 } | |
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120 |
| 342 | 121 void set_concurrent(bool b) { _concurrent = b; } |
| 122 }; | |
| 123 | |
| 124 | |
| 125 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
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126 size_t _num_processed; |
| 342 | 127 CardTableModRefBS* _ctbs; |
| 128 int _histo[256]; | |
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129 |
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130 public: |
| 342 | 131 ClearLoggedCardTableEntryClosure() : |
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132 _num_processed(0), _ctbs(G1CollectedHeap::heap()->g1_barrier_set()) |
| 342 | 133 { |
| 134 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 135 } | |
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136 |
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137 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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138 unsigned char* ujb = (unsigned char*)card_ptr; |
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139 int ind = (int)(*ujb); |
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140 _histo[ind]++; |
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141 |
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142 *card_ptr = (jbyte)CardTableModRefBS::clean_card_val(); |
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143 _num_processed++; |
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144 |
| 342 | 145 return true; |
| 146 } | |
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147 |
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148 size_t num_processed() { return _num_processed; } |
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149 |
| 342 | 150 void print_histo() { |
| 151 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 152 for (int i = 0; i < 256; i++) { | |
| 153 if (_histo[i] != 0) { | |
| 154 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 155 } | |
| 156 } | |
| 157 } | |
| 158 }; | |
| 159 | |
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160 class RedirtyLoggedCardTableEntryClosure : public CardTableEntryClosure { |
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161 private: |
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162 size_t _num_processed; |
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163 |
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164 public: |
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165 RedirtyLoggedCardTableEntryClosure() : CardTableEntryClosure(), _num_processed(0) { } |
| 12343 | 166 |
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167 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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168 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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169 _num_processed++; |
| 342 | 170 return true; |
| 171 } | |
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172 |
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173 size_t num_processed() const { return _num_processed; } |
| 342 | 174 }; |
| 175 | |
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176 YoungList::YoungList(G1CollectedHeap* g1h) : |
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177 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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178 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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179 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 180 } |
| 181 | |
| 182 void YoungList::push_region(HeapRegion *hr) { | |
| 183 assert(!hr->is_young(), "should not already be young"); | |
| 184 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 185 | |
| 186 hr->set_next_young_region(_head); | |
| 187 _head = hr; | |
| 188 | |
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189 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 190 ++_length; |
| 191 } | |
| 192 | |
| 193 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 194 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 195 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 196 | |
| 197 hr->set_next_young_region(_survivor_head); | |
| 198 if (_survivor_head == NULL) { | |
| 545 | 199 _survivor_tail = hr; |
| 342 | 200 } |
| 201 _survivor_head = hr; | |
| 202 ++_survivor_length; | |
| 203 } | |
| 204 | |
| 205 void YoungList::empty_list(HeapRegion* list) { | |
| 206 while (list != NULL) { | |
| 207 HeapRegion* next = list->get_next_young_region(); | |
| 208 list->set_next_young_region(NULL); | |
| 209 list->uninstall_surv_rate_group(); | |
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210 // This is called before a Full GC and all the non-empty / |
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211 // non-humongous regions at the end of the Full GC will end up as |
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212 // old anyway. |
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213 list->set_old(); |
| 342 | 214 list = next; |
| 215 } | |
| 216 } | |
| 217 | |
| 218 void YoungList::empty_list() { | |
| 219 assert(check_list_well_formed(), "young list should be well formed"); | |
| 220 | |
| 221 empty_list(_head); | |
| 222 _head = NULL; | |
| 223 _length = 0; | |
| 224 | |
| 225 empty_list(_survivor_head); | |
| 226 _survivor_head = NULL; | |
| 545 | 227 _survivor_tail = NULL; |
| 342 | 228 _survivor_length = 0; |
| 229 | |
| 230 _last_sampled_rs_lengths = 0; | |
| 231 | |
| 232 assert(check_list_empty(false), "just making sure..."); | |
| 233 } | |
| 234 | |
| 235 bool YoungList::check_list_well_formed() { | |
| 236 bool ret = true; | |
| 237 | |
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238 uint length = 0; |
| 342 | 239 HeapRegion* curr = _head; |
| 240 HeapRegion* last = NULL; | |
| 241 while (curr != NULL) { | |
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242 if (!curr->is_young()) { |
| 342 | 243 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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244 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 245 curr->bottom(), curr->end(), |
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246 curr->is_young(), curr->is_survivor()); |
| 342 | 247 ret = false; |
| 248 } | |
| 249 ++length; | |
| 250 last = curr; | |
| 251 curr = curr->get_next_young_region(); | |
| 252 } | |
| 253 ret = ret && (length == _length); | |
| 254 | |
| 255 if (!ret) { | |
| 256 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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257 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
| 342 | 258 length, _length); |
| 259 } | |
| 260 | |
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261 return ret; |
| 342 | 262 } |
| 263 | |
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264 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 265 bool ret = true; |
| 266 | |
| 267 if (_length != 0) { | |
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268 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
| 342 | 269 _length); |
| 270 ret = false; | |
| 271 } | |
| 272 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 273 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 274 ret = false; | |
| 275 } | |
| 276 if (_head != NULL) { | |
| 277 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 278 ret = false; | |
| 279 } | |
| 280 if (!ret) { | |
| 281 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 282 } | |
| 283 | |
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284 return ret; |
| 342 | 285 } |
| 286 | |
| 287 void | |
| 288 YoungList::rs_length_sampling_init() { | |
| 289 _sampled_rs_lengths = 0; | |
| 290 _curr = _head; | |
| 291 } | |
| 292 | |
| 293 bool | |
| 294 YoungList::rs_length_sampling_more() { | |
| 295 return _curr != NULL; | |
| 296 } | |
| 297 | |
| 298 void | |
| 299 YoungList::rs_length_sampling_next() { | |
| 300 assert( _curr != NULL, "invariant" ); | |
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301 size_t rs_length = _curr->rem_set()->occupied(); |
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302 |
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303 _sampled_rs_lengths += rs_length; |
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304 |
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305 // The current region may not yet have been added to the |
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306 // incremental collection set (it gets added when it is |
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307 // retired as the current allocation region). |
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308 if (_curr->in_collection_set()) { |
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309 // Update the collection set policy information for this region |
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310 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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311 } |
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312 |
| 342 | 313 _curr = _curr->get_next_young_region(); |
| 314 if (_curr == NULL) { | |
| 315 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 316 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 317 } | |
| 318 } | |
| 319 | |
| 320 void | |
| 321 YoungList::reset_auxilary_lists() { | |
| 322 guarantee( is_empty(), "young list should be empty" ); | |
| 323 assert(check_list_well_formed(), "young list should be well formed"); | |
| 324 | |
| 325 // Add survivor regions to SurvRateGroup. | |
| 326 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 327 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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328 |
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329 int young_index_in_cset = 0; |
| 342 | 330 for (HeapRegion* curr = _survivor_head; |
| 331 curr != NULL; | |
| 332 curr = curr->get_next_young_region()) { | |
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333 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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334 |
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335 // The region is a non-empty survivor so let's add it to |
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336 // the incremental collection set for the next evacuation |
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337 // pause. |
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338 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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339 young_index_in_cset += 1; |
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340 } |
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341 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
| 342 | 342 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 343 | |
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344 _head = _survivor_head; |
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345 _length = _survivor_length; |
| 342 | 346 if (_survivor_head != NULL) { |
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347 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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348 assert(_survivor_length > 0, "invariant"); |
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349 _survivor_tail->set_next_young_region(NULL); |
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350 } |
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351 |
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352 // Don't clear the survivor list handles until the start of |
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353 // the next evacuation pause - we need it in order to re-tag |
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354 // the survivor regions from this evacuation pause as 'young' |
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355 // at the start of the next. |
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356 |
| 545 | 357 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 358 |
| 359 assert(check_list_well_formed(), "young list should be well formed"); | |
| 360 } | |
| 361 | |
| 362 void YoungList::print() { | |
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363 HeapRegion* lists[] = {_head, _survivor_head}; |
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364 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 365 |
| 366 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 367 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 368 HeapRegion *curr = lists[list]; | |
| 369 if (curr == NULL) | |
| 370 gclog_or_tty->print_cr(" empty"); | |
| 371 while (curr != NULL) { | |
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372 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT ", N: "PTR_FORMAT", age: %4d", |
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373 HR_FORMAT_PARAMS(curr), |
| 342 | 374 curr->prev_top_at_mark_start(), |
| 375 curr->next_top_at_mark_start(), | |
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376 curr->age_in_surv_rate_group_cond()); |
| 342 | 377 curr = curr->get_next_young_region(); |
| 378 } | |
| 379 } | |
| 380 | |
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381 gclog_or_tty->cr(); |
| 342 | 382 } |
| 383 | |
| 20337 | 384 void G1RegionMappingChangedListener::reset_from_card_cache(uint start_idx, size_t num_regions) { |
| 385 OtherRegionsTable::invalidate(start_idx, num_regions); | |
| 386 } | |
| 387 | |
| 388 void G1RegionMappingChangedListener::on_commit(uint start_idx, size_t num_regions) { | |
| 389 reset_from_card_cache(start_idx, num_regions); | |
| 390 } | |
| 391 | |
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392 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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393 { |
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394 // Claim the right to put the region on the dirty cards region list |
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395 // by installing a self pointer. |
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396 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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397 if (next == NULL) { |
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398 HeapRegion* res = (HeapRegion*) |
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399 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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400 NULL); |
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401 if (res == NULL) { |
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402 HeapRegion* head; |
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403 do { |
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404 // Put the region to the dirty cards region list. |
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405 head = _dirty_cards_region_list; |
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406 next = (HeapRegion*) |
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407 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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408 if (next == head) { |
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409 assert(hr->get_next_dirty_cards_region() == hr, |
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410 "hr->get_next_dirty_cards_region() != hr"); |
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411 if (next == NULL) { |
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412 // The last region in the list points to itself. |
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413 hr->set_next_dirty_cards_region(hr); |
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414 } else { |
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415 hr->set_next_dirty_cards_region(next); |
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416 } |
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417 } |
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418 } while (next != head); |
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419 } |
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420 } |
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421 } |
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422 |
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423 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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424 { |
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425 HeapRegion* head; |
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426 HeapRegion* hr; |
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427 do { |
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428 head = _dirty_cards_region_list; |
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429 if (head == NULL) { |
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430 return NULL; |
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431 } |
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432 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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433 if (head == new_head) { |
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434 // The last region. |
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435 new_head = NULL; |
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436 } |
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437 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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438 head); |
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439 } while (hr != head); |
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440 assert(hr != NULL, "invariant"); |
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441 hr->set_next_dirty_cards_region(NULL); |
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442 return hr; |
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443 } |
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444 |
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445 #ifdef ASSERT |
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446 // A region is added to the collection set as it is retired |
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447 // so an address p can point to a region which will be in the |
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448 // collection set but has not yet been retired. This method |
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449 // therefore is only accurate during a GC pause after all |
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450 // regions have been retired. It is used for debugging |
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451 // to check if an nmethod has references to objects that can |
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452 // be move during a partial collection. Though it can be |
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453 // inaccurate, it is sufficient for G1 because the conservative |
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454 // implementation of is_scavengable() for G1 will indicate that |
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455 // all nmethods must be scanned during a partial collection. |
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456 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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457 if (p == NULL) { |
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458 return false; |
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459 } |
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460 return heap_region_containing(p)->in_collection_set(); |
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461 } |
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462 #endif |
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463 |
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464 // Returns true if the reference points to an object that |
| 10405 | 465 // can move in an incremental collection. |
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466 bool G1CollectedHeap::is_scavengable(const void* p) { |
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467 HeapRegion* hr = heap_region_containing(p); |
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468 return !hr->isHumongous(); |
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469 } |
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470 |
| 342 | 471 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 472 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 12343 | 473 CardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 474 |
| 475 // Count the dirty cards at the start. | |
| 476 CountNonCleanMemRegionClosure count1(this); | |
| 477 ct_bs->mod_card_iterate(&count1); | |
| 478 int orig_count = count1.n(); | |
| 479 | |
| 480 // First clear the logged cards. | |
| 481 ClearLoggedCardTableEntryClosure clear; | |
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482 dcqs.apply_closure_to_all_completed_buffers(&clear); |
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483 dcqs.iterate_closure_all_threads(&clear, false); |
| 342 | 484 clear.print_histo(); |
| 485 | |
| 486 // Now ensure that there's no dirty cards. | |
| 487 CountNonCleanMemRegionClosure count2(this); | |
| 488 ct_bs->mod_card_iterate(&count2); | |
| 489 if (count2.n() != 0) { | |
| 490 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 491 count2.n(), orig_count); | |
| 492 } | |
| 493 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 494 | |
| 495 RedirtyLoggedCardTableEntryClosure redirty; | |
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496 dcqs.apply_closure_to_all_completed_buffers(&redirty); |
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497 dcqs.iterate_closure_all_threads(&redirty, false); |
| 342 | 498 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", |
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499 clear.num_processed(), orig_count); |
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500 guarantee(redirty.num_processed() == clear.num_processed(), |
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501 err_msg("Redirtied "SIZE_FORMAT" cards, bug cleared "SIZE_FORMAT, |
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502 redirty.num_processed(), clear.num_processed())); |
| 342 | 503 |
| 504 CountNonCleanMemRegionClosure count3(this); | |
| 505 ct_bs->mod_card_iterate(&count3); | |
| 506 if (count3.n() != orig_count) { | |
| 507 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 508 orig_count, count3.n()); | |
| 509 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 510 } | |
| 511 } | |
| 512 | |
| 513 // Private class members. | |
| 514 | |
| 515 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 516 | |
| 517 // Private methods. | |
| 518 | |
| 2152 | 519 HeapRegion* |
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520 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
| 2152 | 521 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 522 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 523 if (!_secondary_free_list.is_empty()) { | |
| 524 if (G1ConcRegionFreeingVerbose) { | |
| 525 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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526 "secondary_free_list has %u entries", |
| 2152 | 527 _secondary_free_list.length()); |
| 528 } | |
| 529 // It looks as if there are free regions available on the | |
| 530 // secondary_free_list. Let's move them to the free_list and try | |
| 531 // again to allocate from it. | |
| 532 append_secondary_free_list(); | |
| 533 | |
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534 assert(_hrm.num_free_regions() > 0, "if the secondary_free_list was not " |
| 2152 | 535 "empty we should have moved at least one entry to the free_list"); |
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536 HeapRegion* res = _hrm.allocate_free_region(is_old); |
| 2152 | 537 if (G1ConcRegionFreeingVerbose) { |
| 538 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 539 "allocated "HR_FORMAT" from secondary_free_list", | |
| 540 HR_FORMAT_PARAMS(res)); | |
| 541 } | |
| 542 return res; | |
| 543 } | |
| 544 | |
| 10405 | 545 // Wait here until we get notified either when (a) there are no |
| 2152 | 546 // more free regions coming or (b) some regions have been moved on |
| 547 // the secondary_free_list. | |
| 548 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 549 } | |
| 550 | |
| 551 if (G1ConcRegionFreeingVerbose) { | |
| 552 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 553 "could not allocate from secondary_free_list"); | |
| 554 } | |
| 555 return NULL; | |
| 556 } | |
| 557 | |
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558 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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559 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 560 "the only time we use this to allocate a humongous region is " |
| 561 "when we are allocating a single humongous region"); | |
| 562 | |
| 563 HeapRegion* res; | |
| 564 if (G1StressConcRegionFreeing) { | |
| 565 if (!_secondary_free_list.is_empty()) { | |
| 566 if (G1ConcRegionFreeingVerbose) { | |
| 567 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 568 "forced to look at the secondary_free_list"); | |
| 569 } | |
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570 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 571 if (res != NULL) { |
| 572 return res; | |
| 573 } | |
| 574 } | |
| 575 } | |
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576 |
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577 res = _hrm.allocate_free_region(is_old); |
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578 |
| 2152 | 579 if (res == NULL) { |
| 580 if (G1ConcRegionFreeingVerbose) { | |
| 581 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 582 "res == NULL, trying the secondary_free_list"); | |
| 583 } | |
|
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584 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 585 } |
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586 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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587 // Currently, only attempts to allocate GC alloc regions set |
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588 // do_expand to true. So, we should only reach here during a |
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589 // safepoint. If this assumption changes we might have to |
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590 // reconsider the use of _expand_heap_after_alloc_failure. |
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591 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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592 |
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593 ergo_verbose1(ErgoHeapSizing, |
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594 "attempt heap expansion", |
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595 ergo_format_reason("region allocation request failed") |
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596 ergo_format_byte("allocation request"), |
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597 word_size * HeapWordSize); |
|
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598 if (expand(word_size * HeapWordSize)) { |
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599 // Given that expand() succeeded in expanding the heap, and we |
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600 // always expand the heap by an amount aligned to the heap |
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601 // region size, the free list should in theory not be empty. |
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602 // In either case allocate_free_region() will check for NULL. |
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603 res = _hrm.allocate_free_region(is_old); |
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604 } else { |
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605 _expand_heap_after_alloc_failure = false; |
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606 } |
| 342 | 607 } |
| 608 return res; | |
| 609 } | |
| 610 | |
| 2361 | 611 HeapWord* |
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612 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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613 uint num_regions, |
|
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614 size_t word_size, |
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615 AllocationContext_t context) { |
|
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616 assert(first != G1_NO_HRM_INDEX, "pre-condition"); |
| 2361 | 617 assert(isHumongous(word_size), "word_size should be humongous"); |
| 618 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 619 | |
| 620 // Index of last region in the series + 1. | |
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621 uint last = first + num_regions; |
| 2361 | 622 |
| 623 // We need to initialize the region(s) we just discovered. This is | |
| 624 // a bit tricky given that it can happen concurrently with | |
| 625 // refinement threads refining cards on these regions and | |
| 626 // potentially wanting to refine the BOT as they are scanning | |
| 627 // those cards (this can happen shortly after a cleanup; see CR | |
| 628 // 6991377). So we have to set up the region(s) carefully and in | |
| 629 // a specific order. | |
| 630 | |
| 631 // The word size sum of all the regions we will allocate. | |
|
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632 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 633 assert(word_size <= word_size_sum, "sanity"); |
| 634 | |
| 635 // This will be the "starts humongous" region. | |
| 3766 | 636 HeapRegion* first_hr = region_at(first); |
| 2361 | 637 // The header of the new object will be placed at the bottom of |
| 638 // the first region. | |
| 639 HeapWord* new_obj = first_hr->bottom(); | |
| 640 // This will be the new end of the first region in the series that | |
| 10405 | 641 // should also match the end of the last region in the series. |
| 2361 | 642 HeapWord* new_end = new_obj + word_size_sum; |
| 643 // This will be the new top of the first region that will reflect | |
| 644 // this allocation. | |
| 645 HeapWord* new_top = new_obj + word_size; | |
| 646 | |
| 647 // First, we need to zero the header of the space that we will be | |
| 648 // allocating. When we update top further down, some refinement | |
| 649 // threads might try to scan the region. By zeroing the header we | |
| 650 // ensure that any thread that will try to scan the region will | |
| 651 // come across the zero klass word and bail out. | |
| 652 // | |
| 653 // NOTE: It would not have been correct to have used | |
| 654 // CollectedHeap::fill_with_object() and make the space look like | |
| 655 // an int array. The thread that is doing the allocation will | |
| 656 // later update the object header to a potentially different array | |
| 657 // type and, for a very short period of time, the klass and length | |
| 658 // fields will be inconsistent. This could cause a refinement | |
| 659 // thread to calculate the object size incorrectly. | |
| 660 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 661 | |
| 662 // We will set up the first region as "starts humongous". This | |
| 663 // will also update the BOT covering all the regions to reflect | |
| 664 // that there is a single object that starts at the bottom of the | |
| 665 // first region. | |
| 666 first_hr->set_startsHumongous(new_top, new_end); | |
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667 first_hr->set_allocation_context(context); |
| 2361 | 668 // Then, if there are any, we will set up the "continues |
| 669 // humongous" regions. | |
| 670 HeapRegion* hr = NULL; | |
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671 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 672 hr = region_at(i); |
| 2361 | 673 hr->set_continuesHumongous(first_hr); |
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674 hr->set_allocation_context(context); |
| 2361 | 675 } |
| 676 // If we have "continues humongous" regions (hr != NULL), then the | |
| 677 // end of the last one should match new_end. | |
| 678 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 679 | |
| 680 // Up to this point no concurrent thread would have been able to | |
| 681 // do any scanning on any region in this series. All the top | |
| 682 // fields still point to bottom, so the intersection between | |
| 683 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 684 // update the top fields, we'll do a storestore to make sure that | |
| 685 // no thread sees the update to top before the zeroing of the | |
| 686 // object header and the BOT initialization. | |
| 687 OrderAccess::storestore(); | |
| 688 | |
| 689 // Now that the BOT and the object header have been initialized, | |
| 690 // we can update top of the "starts humongous" region. | |
| 691 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 692 "new_top should be in this region"); | |
| 693 first_hr->set_top(new_top); | |
|
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694 if (_hr_printer.is_active()) { |
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695 HeapWord* bottom = first_hr->bottom(); |
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696 HeapWord* end = first_hr->orig_end(); |
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697 if ((first + 1) == last) { |
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698 // the series has a single humongous region |
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699 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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700 } else { |
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701 // the series has more than one humongous regions |
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702 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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703 } |
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704 } |
| 2361 | 705 |
| 706 // Now, we will update the top fields of the "continues humongous" | |
| 707 // regions. The reason we need to do this is that, otherwise, | |
| 708 // these regions would look empty and this will confuse parts of | |
| 709 // G1. For example, the code that looks for a consecutive number | |
| 710 // of empty regions will consider them empty and try to | |
| 711 // re-allocate them. We can extend is_empty() to also include | |
| 712 // !continuesHumongous(), but it is easier to just update the top | |
| 713 // fields here. The way we set top for all regions (i.e., top == | |
| 714 // end for all regions but the last one, top == new_top for the | |
| 715 // last one) is actually used when we will free up the humongous | |
| 716 // region in free_humongous_region(). | |
| 717 hr = NULL; | |
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718 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 719 hr = region_at(i); |
| 2361 | 720 if ((i + 1) == last) { |
| 721 // last continues humongous region | |
| 722 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 723 "new_top should fall on this region"); | |
| 724 hr->set_top(new_top); | |
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725 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 726 } else { |
| 727 // not last one | |
| 728 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 729 hr->set_top(hr->end()); | |
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730 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 731 } |
| 732 } | |
| 733 // If we have continues humongous regions (hr != NULL), then the | |
| 734 // end of the last one should match new_end and its top should | |
| 735 // match new_top. | |
| 736 assert(hr == NULL || | |
| 737 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
|
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738 check_bitmaps("Humongous Region Allocation", first_hr); |
| 2361 | 739 |
| 740 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
|
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741 _allocator->increase_used(first_hr->used()); |
| 2361 | 742 _humongous_set.add(first_hr); |
| 743 | |
| 744 return new_obj; | |
| 745 } | |
| 746 | |
| 342 | 747 // If could fit into free regions w/o expansion, try. |
| 748 // Otherwise, if can expand, do so. | |
| 749 // Otherwise, if using ex regions might help, try with ex given back. | |
|
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750 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size, AllocationContext_t context) { |
| 2152 | 751 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 752 | |
| 753 verify_region_sets_optional(); | |
| 342 | 754 |
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755 uint first = G1_NO_HRM_INDEX; |
|
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756 uint obj_regions = (uint)(align_size_up_(word_size, HeapRegion::GrainWords) / HeapRegion::GrainWords); |
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757 |
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758 if (obj_regions == 1) { |
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759 // Only one region to allocate, try to use a fast path by directly allocating |
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760 // from the free lists. Do not try to expand here, we will potentially do that |
|
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761 // later. |
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762 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
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763 if (hr != NULL) { |
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764 first = hr->hrm_index(); |
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765 } |
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766 } else { |
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767 // We can't allocate humongous regions spanning more than one region while |
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768 // cleanupComplete() is running, since some of the regions we find to be |
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769 // empty might not yet be added to the free list. It is not straightforward |
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770 // to know in which list they are on so that we can remove them. We only |
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771 // need to do this if we need to allocate more than one region to satisfy the |
|
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772 // current humongous allocation request. If we are only allocating one region |
| 20337 | 773 // we use the one-region region allocation code (see above), that already |
| 774 // potentially waits for regions from the secondary free list. | |
|
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775 wait_while_free_regions_coming(); |
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776 append_secondary_free_list_if_not_empty_with_lock(); |
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777 |
|
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778 // Policy: Try only empty regions (i.e. already committed first). Maybe we |
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779 // are lucky enough to find some. |
|
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780 first = _hrm.find_contiguous_only_empty(obj_regions); |
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781 if (first != G1_NO_HRM_INDEX) { |
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782 _hrm.allocate_free_regions_starting_at(first, obj_regions); |
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783 } |
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784 } |
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785 |
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786 if (first == G1_NO_HRM_INDEX) { |
|
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787 // Policy: We could not find enough regions for the humongous object in the |
|
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788 // free list. Look through the heap to find a mix of free and uncommitted regions. |
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789 // If so, try expansion. |
|
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790 first = _hrm.find_contiguous_empty_or_unavailable(obj_regions); |
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791 if (first != G1_NO_HRM_INDEX) { |
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792 // We found something. Make sure these regions are committed, i.e. expand |
|
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793 // the heap. Alternatively we could do a defragmentation GC. |
|
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794 ergo_verbose1(ErgoHeapSizing, |
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795 "attempt heap expansion", |
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796 ergo_format_reason("humongous allocation request failed") |
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797 ergo_format_byte("allocation request"), |
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798 word_size * HeapWordSize); |
|
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799 |
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800 _hrm.expand_at(first, obj_regions); |
|
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801 g1_policy()->record_new_heap_size(num_regions()); |
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802 |
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803 #ifdef ASSERT |
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804 for (uint i = first; i < first + obj_regions; ++i) { |
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805 HeapRegion* hr = region_at(i); |
|
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806 assert(hr->is_free(), "sanity"); |
|
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807 assert(hr->is_empty(), "sanity"); |
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808 assert(is_on_master_free_list(hr), "sanity"); |
|
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809 } |
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810 #endif |
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811 _hrm.allocate_free_regions_starting_at(first, obj_regions); |
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812 } else { |
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813 // Policy: Potentially trigger a defragmentation GC. |
| 2152 | 814 } |
| 815 } | |
| 816 | |
| 2361 | 817 HeapWord* result = NULL; |
|
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818 if (first != G1_NO_HRM_INDEX) { |
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819 result = humongous_obj_allocate_initialize_regions(first, obj_regions, |
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820 word_size, context); |
| 2361 | 821 assert(result != NULL, "it should always return a valid result"); |
|
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822 |
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823 // A successful humongous object allocation changes the used space |
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824 // information of the old generation so we need to recalculate the |
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825 // sizes and update the jstat counters here. |
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826 g1mm()->update_sizes(); |
| 2152 | 827 } |
| 828 | |
| 829 verify_region_sets_optional(); | |
| 2361 | 830 |
| 831 return result; | |
| 342 | 832 } |
| 833 | |
| 1973 | 834 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 835 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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836 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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837 |
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838 unsigned int dummy_gc_count_before; |
|
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839 int dummy_gclocker_retry_count = 0; |
|
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840 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
| 342 | 841 } |
| 842 | |
| 843 HeapWord* | |
| 844 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 845 bool* gc_overhead_limit_was_exceeded) { |
| 846 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 847 |
| 10405 | 848 // Loop until the allocation is satisfied, or unsatisfied after GC. |
|
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849 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
| 1973 | 850 unsigned int gc_count_before; |
|
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851 |
|
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852 HeapWord* result = NULL; |
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853 if (!isHumongous(word_size)) { |
|
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854 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
|
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855 } else { |
|
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856 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
|
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857 } |
|
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858 if (result != NULL) { |
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859 return result; |
| 342 | 860 } |
| 861 | |
| 862 // Create the garbage collection operation... | |
| 1973 | 863 VM_G1CollectForAllocation op(gc_count_before, word_size); |
|
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864 op.set_allocation_context(AllocationContext::current()); |
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865 |
| 342 | 866 // ...and get the VM thread to execute it. |
| 867 VMThread::execute(&op); | |
| 1973 | 868 |
| 869 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 870 // If the operation was successful we'll return the result even | |
| 871 // if it is NULL. If the allocation attempt failed immediately | |
| 872 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 873 HeapWord* result = op.result(); | |
| 874 if (result != NULL && !isHumongous(word_size)) { | |
| 875 // Allocations that take place on VM operations do not do any | |
| 876 // card dirtying and we have to do it here. We only have to do | |
| 877 // this for non-humongous allocations, though. | |
| 878 dirty_young_block(result, word_size); | |
| 879 } | |
| 342 | 880 return result; |
| 1973 | 881 } else { |
|
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882 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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883 return NULL; |
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|
884 } |
| 1973 | 885 assert(op.result() == NULL, |
| 886 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 887 } |
| 888 | |
| 889 // Give a warning if we seem to be looping forever. | |
| 890 if ((QueuedAllocationWarningCount > 0) && | |
| 891 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 892 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 893 } |
| 894 } | |
| 1973 | 895 |
| 896 ShouldNotReachHere(); | |
|
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897 return NULL; |
| 342 | 898 } |
| 899 | |
|
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900 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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901 AllocationContext_t context, |
|
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902 unsigned int *gc_count_before_ret, |
|
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903 int* gclocker_retry_count_ret) { |
|
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904 // Make sure you read the note in attempt_allocation_humongous(). |
|
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905 |
|
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906 assert_heap_not_locked_and_not_at_safepoint(); |
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907 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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908 "be called for humongous allocation requests"); |
|
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909 |
|
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|
910 // We should only get here after the first-level allocation attempt |
|
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|
911 // (attempt_allocation()) failed to allocate. |
|
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|
912 |
|
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|
913 // We will loop until a) we manage to successfully perform the |
|
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|
914 // allocation or b) we successfully schedule a collection which |
|
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|
915 // fails to perform the allocation. b) is the only case when we'll |
|
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|
916 // return NULL. |
|
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|
917 HeapWord* result = NULL; |
|
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|
918 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
919 bool should_try_gc; |
|
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|
920 unsigned int gc_count_before; |
|
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|
921 |
|
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|
922 { |
|
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|
923 MutexLockerEx x(Heap_lock); |
|
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|
924 result = _allocator->mutator_alloc_region(context)->attempt_allocation_locked(word_size, |
|
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|
925 false /* bot_updates */); |
|
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|
926 if (result != NULL) { |
|
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|
927 return result; |
|
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|
928 } |
|
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|
929 |
|
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|
930 // If we reach here, attempt_allocation_locked() above failed to |
|
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|
931 // allocate a new region. So the mutator alloc region should be NULL. |
|
20404
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|
932 assert(_allocator->mutator_alloc_region(context)->get() == NULL, "only way to get here"); |
|
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|
933 |
|
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|
934 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
935 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
|
936 // 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
diff
changeset
|
937 // can_expand_young_list() does this when it returns true. |
|
20404
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8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
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diff
changeset
|
938 result = _allocator->mutator_alloc_region(context)->attempt_allocation_force(word_size, |
|
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changeset
|
939 false /* bot_updates */); |
|
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|
940 if (result != NULL) { |
|
abdfc822206f
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diff
changeset
|
941 return result; |
|
abdfc822206f
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|
942 } |
|
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|
943 } |
|
abdfc822206f
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|
944 should_try_gc = false; |
|
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|
945 } else { |
|
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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diff
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|
946 // 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
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changeset
|
947 // GC may not yet have been performed (GCLocker::needs_gc() |
|
1d478c993020
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diff
changeset
|
948 // 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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diff
changeset
|
949 // 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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changeset
|
950 // then retry the allocation. |
|
1d478c993020
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changeset
|
951 if (GC_locker::needs_gc()) { |
|
1d478c993020
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changeset
|
952 should_try_gc = false; |
|
1d478c993020
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johnc
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diff
changeset
|
953 } 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
|
954 // 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
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changeset
|
955 gc_count_before = total_collections(); |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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diff
changeset
|
956 should_try_gc = true; |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
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diff
changeset
|
957 } |
|
2433
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|
958 } |
|
abdfc822206f
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diff
changeset
|
959 } |
|
abdfc822206f
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changeset
|
960 |
|
abdfc822206f
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diff
changeset
|
961 if (should_try_gc) { |
|
abdfc822206f
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changeset
|
962 bool succeeded; |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
963 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
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12082
diff
changeset
|
964 GCCause::_g1_inc_collection_pause); |
|
2433
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changeset
|
965 if (result != NULL) { |
|
abdfc822206f
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diff
changeset
|
966 assert(succeeded, "only way to get back a non-NULL result"); |
|
abdfc822206f
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|
967 return result; |
|
abdfc822206f
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diff
changeset
|
968 } |
|
abdfc822206f
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changeset
|
969 |
|
abdfc822206f
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diff
changeset
|
970 if (succeeded) { |
|
abdfc822206f
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diff
changeset
|
971 // If we get here we successfully scheduled a collection which |
|
abdfc822206f
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|
972 // failed to allocate. No point in trying to allocate |
|
abdfc822206f
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|
973 // further. We'll just return NULL. |
|
abdfc822206f
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changeset
|
974 MutexLockerEx x(Heap_lock); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
975 *gc_count_before_ret = total_collections(); |
|
2433
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changeset
|
976 return NULL; |
|
abdfc822206f
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2432
diff
changeset
|
977 } |
|
abdfc822206f
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changeset
|
978 } else { |
|
8853
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mgerdin
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8038
diff
changeset
|
979 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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8038
diff
changeset
|
980 MutexLockerEx x(Heap_lock); |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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diff
changeset
|
981 *gc_count_before_ret = total_collections(); |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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changeset
|
982 return NULL; |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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diff
changeset
|
983 } |
|
6106
1d478c993020
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6064
diff
changeset
|
984 // The GCLocker is either active or the GCLocker initiated |
|
1d478c993020
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6064
diff
changeset
|
985 // 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
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diff
changeset
|
986 // then retry the allocation. |
|
2433
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changeset
|
987 GC_locker::stall_until_clear(); |
|
8853
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7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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changeset
|
988 (*gclocker_retry_count_ret) += 1; |
|
2433
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989 } |
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990 |
| 10405 | 991 // We can reach here if we were unsuccessful in scheduling a |
|
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992 // collection (because another thread beat us to it) or if we were |
|
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993 // stalled due to the GC locker. In either can we should retry the |
|
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994 // allocation attempt in case another thread successfully |
|
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995 // performed a collection and reclaimed enough space. We do the |
|
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996 // first attempt (without holding the Heap_lock) here and the |
|
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997 // follow-on attempt will be at the start of the next loop |
|
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998 // iteration (after taking the Heap_lock). |
|
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999 result = _allocator->mutator_alloc_region(context)->attempt_allocation(word_size, |
|
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1000 false /* bot_updates */); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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1001 if (result != NULL) { |
|
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1002 return result; |
|
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1003 } |
|
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1004 |
|
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1005 // Give a warning if we seem to be looping forever. |
|
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1006 if ((QueuedAllocationWarningCount > 0) && |
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1007 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1008 warning("G1CollectedHeap::attempt_allocation_slow() " |
|
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1009 "retries %d times", try_count); |
|
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1010 } |
|
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1011 } |
|
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1012 |
|
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|
1013 ShouldNotReachHere(); |
|
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|
1014 return NULL; |
|
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1015 } |
|
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1016 |
|
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1017 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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|
1018 unsigned int * gc_count_before_ret, |
|
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1019 int* gclocker_retry_count_ret) { |
|
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1020 // The structure of this method has a lot of similarities to |
|
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|
1021 // attempt_allocation_slow(). The reason these two were not merged |
|
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1022 // into a single one is that such a method would require several "if |
|
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1023 // allocation is not humongous do this, otherwise do that" |
|
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1024 // conditional paths which would obscure its flow. In fact, an early |
|
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1025 // version of this code did use a unified method which was harder to |
|
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1026 // follow and, as a result, it had subtle bugs that were hard to |
|
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1027 // track down. So keeping these two methods separate allows each to |
|
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1028 // be more readable. It will be good to keep these two in sync as |
|
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1029 // much as possible. |
|
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1030 |
|
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1031 assert_heap_not_locked_and_not_at_safepoint(); |
|
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1032 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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1033 "should only be called for humongous allocations"); |
|
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|
1034 |
|
4834
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7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1035 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
6a78aa6ac1ff
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4833
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changeset
|
1036 // need to start a marking cycle at each humongous object allocation. We do |
|
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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4833
diff
changeset
|
1037 // the check before we do the actual allocation. The reason for doing it |
|
6a78aa6ac1ff
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|
1038 // before the allocation is that we avoid having to keep track of the newly |
|
6a78aa6ac1ff
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|
1039 // allocated memory while we do a GC. |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
1040 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
1041 word_size)) { |
|
4834
6a78aa6ac1ff
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diff
changeset
|
1042 collect(GCCause::_g1_humongous_allocation); |
|
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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parents:
4833
diff
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|
1043 } |
|
6a78aa6ac1ff
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brutisso
parents:
4833
diff
changeset
|
1044 |
|
2433
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|
1045 // We will loop until a) we manage to successfully perform the |
|
abdfc822206f
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|
1046 // allocation or b) we successfully schedule a collection which |
|
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|
1047 // fails to perform the allocation. b) is the only case when we'll |
|
abdfc822206f
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parents:
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|
1048 // return NULL. |
|
abdfc822206f
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|
1049 HeapWord* result = NULL; |
|
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|
1050 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
abdfc822206f
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parents:
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|
1051 bool should_try_gc; |
|
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|
1052 unsigned int gc_count_before; |
|
abdfc822206f
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|
1053 |
|
abdfc822206f
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diff
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|
1054 { |
|
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changeset
|
1055 MutexLockerEx x(Heap_lock); |
|
abdfc822206f
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|
1056 |
|
abdfc822206f
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parents:
2432
diff
changeset
|
1057 // Given that humongous objects are not allocated in young |
|
abdfc822206f
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changeset
|
1058 // regions, we'll first try to do the allocation without doing a |
|
abdfc822206f
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changeset
|
1059 // collection hoping that there's enough space in the heap. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
1060 result = humongous_obj_allocate(word_size, AllocationContext::current()); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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|
1061 if (result != NULL) { |
|
abdfc822206f
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parents:
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diff
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|
1062 return result; |
|
abdfc822206f
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parents:
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diff
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|
1063 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
1064 |
|
abdfc822206f
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|
1065 if (GC_locker::is_active_and_needs_gc()) { |
|
abdfc822206f
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parents:
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diff
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|
1066 should_try_gc = false; |
|
abdfc822206f
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parents:
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diff
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|
1067 } else { |
|
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1068 // The GCLocker may not be active but the GCLocker initiated |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1069 // GC may not yet have been performed (GCLocker::needs_gc() |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1070 // returns true). In this case we do not try this GC and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1071 // wait until the GCLocker initiated GC is performed, and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1072 // then retry the allocation. |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1073 if (GC_locker::needs_gc()) { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1074 should_try_gc = false; |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1075 } else { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
1076 // 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
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parents:
6064
diff
changeset
|
1077 gc_count_before = total_collections(); |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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parents:
6064
diff
changeset
|
1078 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
|
1079 } |
|
2433
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parents:
2432
diff
changeset
|
1080 } |
|
abdfc822206f
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parents:
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diff
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|
1081 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
1082 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
1083 if (should_try_gc) { |
|
abdfc822206f
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parents:
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diff
changeset
|
1084 // If we failed to allocate the humongous object, we should try to |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
1085 // do a collection pause (if we're allowed) in case it reclaims |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
1086 // enough space for the allocation to succeed after the pause. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
1087 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
1088 bool succeeded; |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
1089 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
|
1090 GCCause::_g1_humongous_allocation); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
1091 if (result != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1092 assert(succeeded, "only way to get back a non-NULL result"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
1093 return result; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1094 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
1095 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
1096 if (succeeded) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
1097 // If we get here we successfully scheduled a collection which |
|
abdfc822206f
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parents:
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diff
changeset
|
1098 // failed to allocate. No point in trying to allocate |
|
abdfc822206f
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|
1099 // further. We'll just return NULL. |
|
abdfc822206f
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|
1100 MutexLockerEx x(Heap_lock); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
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|
1101 *gc_count_before_ret = total_collections(); |
|
2433
abdfc822206f
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2432
diff
changeset
|
1102 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
1103 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
1104 } else { |
|
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1105 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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1106 MutexLockerEx x(Heap_lock); |
|
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1107 *gc_count_before_ret = total_collections(); |
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1108 return NULL; |
|
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1109 } |
|
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1110 // The GCLocker is either active or the GCLocker initiated |
|
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1111 // GC has not yet been performed. Stall until it is and |
|
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1112 // then retry the allocation. |
|
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1113 GC_locker::stall_until_clear(); |
|
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1114 (*gclocker_retry_count_ret) += 1; |
|
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1115 } |
|
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1116 |
| 10405 | 1117 // We can reach here if we were unsuccessful in scheduling a |
|
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1118 // collection (because another thread beat us to it) or if we were |
|
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1119 // stalled due to the GC locker. In either can we should retry the |
|
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1120 // allocation attempt in case another thread successfully |
|
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1121 // performed a collection and reclaimed enough space. Give a |
|
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1122 // warning if we seem to be looping forever. |
|
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1123 |
|
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1124 if ((QueuedAllocationWarningCount > 0) && |
|
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1125 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1126 warning("G1CollectedHeap::attempt_allocation_humongous() " |
|
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1127 "retries %d times", try_count); |
|
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1128 } |
|
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1129 } |
|
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1130 |
|
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1131 ShouldNotReachHere(); |
|
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1132 return NULL; |
|
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1133 } |
|
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1134 |
|
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1135 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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1136 AllocationContext_t context, |
|
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1137 bool expect_null_mutator_alloc_region) { |
| 2152 | 1138 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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1139 assert(_allocator->mutator_alloc_region(context)->get() == NULL || |
|
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1140 !expect_null_mutator_alloc_region, |
|
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1141 "the current alloc region was unexpectedly found to be non-NULL"); |
|
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|
1142 |
|
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|
1143 if (!isHumongous(word_size)) { |
|
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1144 return _allocator->mutator_alloc_region(context)->attempt_allocation_locked(word_size, |
|
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1145 false /* bot_updates */); |
|
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1146 } else { |
|
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|
1147 HeapWord* result = humongous_obj_allocate(word_size, context); |
|
4829
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|
1148 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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|
1149 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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|
1150 } |
|
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|
1151 return result; |
|
2433
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|
1152 } |
|
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|
1153 |
|
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|
1154 ShouldNotReachHere(); |
| 342 | 1155 } |
| 1156 | |
| 1157 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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1158 G1CollectedHeap* _g1h; |
| 342 | 1159 ModRefBarrierSet* _mr_bs; |
| 1160 public: | |
|
6254
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1161 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
| 12080 | 1162 _g1h(g1h), _mr_bs(mr_bs) {} |
| 1163 | |
| 342 | 1164 bool doHeapRegion(HeapRegion* r) { |
| 12080 | 1165 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1166 | |
|
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|
1167 if (r->continuesHumongous()) { |
| 12080 | 1168 // We'll assert that the strong code root list and RSet is empty |
| 1169 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
| 1170 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
| 342 | 1171 return false; |
|
6254
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|
1172 } |
| 12080 | 1173 |
|
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|
1174 _g1h->reset_gc_time_stamps(r); |
| 12080 | 1175 hrrs->clear(); |
| 342 | 1176 // You might think here that we could clear just the cards |
| 1177 // corresponding to the used region. But no: if we leave a dirty card | |
| 1178 // in a region we might allocate into, then it would prevent that card | |
| 1179 // from being enqueued, and cause it to be missed. | |
| 1180 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1181 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 12080 | 1182 |
| 342 | 1183 return false; |
| 1184 } | |
| 1185 }; | |
| 1186 | |
|
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|
1187 void G1CollectedHeap::clear_rsets_post_compaction() { |
| 12343 | 1188 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
|
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1189 heap_region_iterate(&rs_clear); |
|
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|
1190 } |
| 342 | 1191 |
|
626
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|
1192 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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|
1193 G1CollectedHeap* _g1h; |
|
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|
1194 UpdateRSOopClosure _cl; |
|
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|
1195 int _worker_i; |
|
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|
1196 public: |
|
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|
1197 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1198 _cl(g1->g1_rem_set(), worker_i), |
|
626
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|
1199 _worker_i(worker_i), |
|
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|
1200 _g1h(g1) |
|
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|
1201 { } |
|
1960
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6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
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|
1202 |
|
626
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|
1203 bool doHeapRegion(HeapRegion* r) { |
|
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|
1204 if (!r->continuesHumongous()) { |
|
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|
1205 _cl.set_from(r); |
|
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|
1206 r->oop_iterate(&_cl); |
|
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|
1207 } |
|
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|
1208 return false; |
|
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|
1209 } |
|
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|
1210 }; |
|
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|
1211 |
|
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|
1212 class ParRebuildRSTask: public AbstractGangTask { |
|
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|
1213 G1CollectedHeap* _g1; |
|
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|
1214 public: |
|
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|
1215 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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|
1216 : AbstractGangTask("ParRebuildRSTask"), |
|
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|
1217 _g1(g1) |
|
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|
1218 { } |
|
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|
1219 |
|
4728
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|
1220 void work(uint worker_id) { |
|
441e946dc1af
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|
1221 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
441e946dc1af
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|
1222 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
bca17e38de00
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diff
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|
1223 _g1->workers()->active_workers(), |
|
626
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|
1224 HeapRegion::RebuildRSClaimValue); |
|
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|
1225 } |
|
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|
1226 }; |
|
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|
1227 |
|
3778
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changeset
|
1228 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
5f6f2615433a
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|
1229 private: |
|
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|
1230 G1HRPrinter* _hr_printer; |
|
5f6f2615433a
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|
1231 public: |
|
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|
1232 bool doHeapRegion(HeapRegion* hr) { |
|
5f6f2615433a
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changeset
|
1233 assert(!hr->is_young(), "not expecting to find young regions"); |
|
20481
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|
1234 if (hr->is_free()) { |
|
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|
1235 // We only generate output for non-empty regions. |
|
c02ec279b062
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|
1236 } else if (hr->startsHumongous()) { |
|
c02ec279b062
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changeset
|
1237 if (hr->region_num() == 1) { |
|
c02ec279b062
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diff
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|
1238 // single humongous region |
|
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|
1239 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
3778
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|
1240 } else { |
|
20481
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|
1241 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
3778
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|
1242 } |
|
20481
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|
1243 } else if (hr->continuesHumongous()) { |
|
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diff
changeset
|
1244 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
c02ec279b062
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diff
changeset
|
1245 } else if (hr->is_old()) { |
|
c02ec279b062
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diff
changeset
|
1246 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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brutisso
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changeset
|
1247 } else { |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
1248 ShouldNotReachHere(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1249 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1250 return false; |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1251 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1252 |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1253 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1254 : _hr_printer(hr_printer) { } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1255 }; |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1256 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
1257 void G1CollectedHeap::print_hrm_post_compaction() { |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1258 PostCompactionPrinterClosure cl(hr_printer()); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1259 heap_region_iterate(&cl); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1260 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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diff
changeset
|
1261 |
| 1973 | 1262 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1263 bool clear_all_soft_refs, |
| 342 | 1264 size_t word_size) { |
| 2152 | 1265 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1266 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1267 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1268 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1269 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1270 |
| 10405 | 1271 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
1272 gc_timer->register_gc_start(); |
| 10405 | 1273 |
| 1274 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
| 1275 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
| 1276 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1277 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1278 ResourceMark rm; |
| 1279 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
1280 print_heap_before_gc(); |
| 10405 | 1281 trace_heap_before_gc(gc_tracer); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1282 |
|
17866
270d7cb38f40
8038934: Remove prefix allocated_ from methods and variables in Metaspace
ehelin
parents:
17844
diff
changeset
|
1283 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1284 |
| 2152 | 1285 verify_region_sets_optional(); |
| 342 | 1286 |
|
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1287 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1288 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1289 |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1290 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1291 |
| 342 | 1292 { |
| 1293 IsGCActiveMark x; | |
| 1294 | |
| 1295 // Timing | |
| 6030 | 1296 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1297 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
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diff
changeset
|
1298 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1299 |
| 342 | 1300 { |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
1301 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL, gc_tracer->gc_id()); |
|
10098
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|
1302 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1303 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1304 |
|
71013d764f6e
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diff
changeset
|
1305 double start = os::elapsedTime(); |
|
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8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1306 g1_policy()->record_full_collection_start(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1307 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1308 // Note: When we have a more flexible GC logging framework that |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1309 // allows us to add optional attributes to a GC log record we |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1310 // could consider timing and reporting how long we wait in the |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1311 // following two methods. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1312 wait_while_free_regions_coming(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1313 // If we start the compaction before the CM threads finish |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1314 // scanning the root regions we might trip them over as we'll |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1315 // be moving objects / updating references. So let's wait until |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1316 // they are done. By telling them to abort, they should complete |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1317 // early. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1318 _cm->root_regions()->abort(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1319 _cm->root_regions()->wait_until_scan_finished(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1320 append_secondary_free_list_if_not_empty_with_lock(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1321 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1322 gc_prologue(true); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1323 increment_total_collections(true /* full gc */); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1324 increment_old_marking_cycles_started(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1325 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1326 assert(used() == recalculate_used(), "Should be equal"); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1327 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1328 verify_before_gc(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1329 |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
1330 check_bitmaps("Full GC Start"); |
| 10405 | 1331 pre_full_gc_dump(gc_timer); |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1332 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1333 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1334 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1335 // Disable discovery and empty the discovered lists |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1336 // for the CM ref processor. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1337 ref_processor_cm()->disable_discovery(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1338 ref_processor_cm()->abandon_partial_discovery(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1339 ref_processor_cm()->verify_no_references_recorded(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1340 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1341 // Abandon current iterations of concurrent marking and concurrent |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1342 // refinement, if any are in progress. We have to do this before |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1343 // wait_until_scan_finished() below. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1344 concurrent_mark()->abort(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1345 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1346 // Make sure we'll choose a new allocation region afterwards. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
1347 _allocator->release_mutator_alloc_region(); |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
1348 _allocator->abandon_gc_alloc_regions(); |
|
10098
71013d764f6e
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parents:
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diff
changeset
|
1349 g1_rem_set()->cleanupHRRS(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1350 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1351 // We should call this after we retire any currently active alloc |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1352 // regions so that all the ALLOC / RETIRE events are generated |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1353 // before the start GC event. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1354 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1355 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1356 // We may have added regions to the current incremental collection |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1357 // set between the last GC or pause and now. We need to clear the |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
8855
diff
changeset
|
1358 // incremental collection set and then start rebuilding it afresh |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1359 // after this full GC. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1360 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1361 g1_policy()->clear_incremental_cset(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1362 g1_policy()->stop_incremental_cset_building(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1363 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1364 tear_down_region_sets(false /* free_list_only */); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1365 g1_policy()->set_gcs_are_young(true); |
|
71013d764f6e
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parents:
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diff
changeset
|
1366 |
|
71013d764f6e
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diff
changeset
|
1367 // See the comments in g1CollectedHeap.hpp and |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1368 // G1CollectedHeap::ref_processing_init() about |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1369 // how reference processing currently works in G1. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1370 |
|
71013d764f6e
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diff
changeset
|
1371 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
71013d764f6e
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diff
changeset
|
1372 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
71013d764f6e
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diff
changeset
|
1373 |
|
71013d764f6e
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diff
changeset
|
1374 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
71013d764f6e
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diff
changeset
|
1375 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
71013d764f6e
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diff
changeset
|
1376 |
|
71013d764f6e
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parents:
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diff
changeset
|
1377 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
71013d764f6e
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changeset
|
1378 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1379 |
|
71013d764f6e
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diff
changeset
|
1380 // Do collection work |
|
71013d764f6e
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parents:
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diff
changeset
|
1381 { |
|
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1382 HandleMark hm; // Discard invalid handles created during gc |
|
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|
1383 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
|
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1384 } |
|
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|
1385 |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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|
1386 assert(num_free_regions() == 0, "we should not have added any free regions"); |
|
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|
1387 rebuild_region_sets(false /* free_list_only */); |
|
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|
1388 |
|
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|
1389 // Enqueue any discovered reference objects that have |
|
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1390 // not been removed from the discovered lists. |
|
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|
1391 ref_processor_stw()->enqueue_discovered_references(); |
|
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|
1392 |
|
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|
1393 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
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|
1394 |
|
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|
1395 MemoryService::track_memory_usage(); |
|
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|
1396 |
|
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|
1397 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
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|
1398 ref_processor_stw()->verify_no_references_recorded(); |
|
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|
1399 |
|
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|
1400 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
|
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|
1401 ClassLoaderDataGraph::purge(); |
| 12080 | 1402 MetaspaceAux::verify_metrics(); |
|
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|
1403 |
|
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|
1404 // Note: since we've just done a full GC, concurrent |
|
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|
1405 // marking is no longer active. Therefore we need not |
|
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|
1406 // re-enable reference discovery for the CM ref processor. |
|
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|
1407 // That will be done at the start of the next marking cycle. |
|
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|
1408 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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|
1409 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1410 |
|
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|
1411 reset_gc_time_stamp(); |
|
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|
1412 // Since everything potentially moved, we will clear all remembered |
| 10405 | 1413 // sets, and clear all cards. Later we will rebuild remembered |
|
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1414 // sets. We will also reset the GC time stamps of the regions. |
|
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|
1415 clear_rsets_post_compaction(); |
|
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|
1416 check_gc_time_stamps(); |
|
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|
1417 |
|
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|
1418 // Resize the heap if necessary. |
|
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|
1419 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
|
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|
1420 |
|
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|
1421 if (_hr_printer.is_active()) { |
|
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|
1422 // We should do this after we potentially resize the heap so |
|
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|
1423 // that all the COMMIT / UNCOMMIT events are generated before |
|
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|
1424 // the end GC event. |
|
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|
1425 |
|
20377
a8ea2f110d87
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|
1426 print_hrm_post_compaction(); |
|
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|
1427 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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|
1428 } |
|
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|
1429 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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|
1430 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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|
1431 if (hot_card_cache->use_cache()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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|
1432 hot_card_cache->reset_card_counts(); |
|
194f52aa2f23
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|
1433 hot_card_cache->reset_hot_cache(); |
|
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|
1434 } |
|
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|
1435 |
|
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|
1436 // Rebuild remembered sets of all regions. |
|
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|
1437 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
1438 uint n_workers = |
|
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|
1439 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1440 workers()->active_workers(), |
|
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|
1441 Threads::number_of_non_daemon_threads()); |
|
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|
1442 assert(UseDynamicNumberOfGCThreads || |
|
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|
1443 n_workers == workers()->total_workers(), |
|
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|
1444 "If not dynamic should be using all the workers"); |
|
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|
1445 workers()->set_active_workers(n_workers); |
|
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|
1446 // Set parallel threads in the heap (_n_par_threads) only |
|
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|
1447 // before a parallel phase and always reset it to 0 after |
|
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|
1448 // the phase so that the number of parallel threads does |
|
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|
1449 // no get carried forward to a serial phase where there |
|
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|
1450 // may be code that is "possibly_parallel". |
|
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|
1451 set_par_threads(n_workers); |
|
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|
1452 |
|
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|
1453 ParRebuildRSTask rebuild_rs_task(this); |
|
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|
1454 assert(check_heap_region_claim_values( |
|
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|
1455 HeapRegion::InitialClaimValue), "sanity check"); |
|
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|
1456 assert(UseDynamicNumberOfGCThreads || |
|
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|
1457 workers()->active_workers() == workers()->total_workers(), |
|
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|
1458 "Unless dynamic should use total workers"); |
|
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|
1459 // Use the most recent number of active workers |
|
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|
1460 assert(workers()->active_workers() > 0, |
|
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|
1461 "Active workers not properly set"); |
|
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|
1462 set_par_threads(workers()->active_workers()); |
|
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|
1463 workers()->run_task(&rebuild_rs_task); |
|
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|
1464 set_par_threads(0); |
|
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|
1465 assert(check_heap_region_claim_values( |
|
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|
1466 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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|
1467 reset_heap_region_claim_values(); |
|
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|
1468 } else { |
|
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|
1469 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1470 heap_region_iterate(&rebuild_rs); |
|
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|
1471 } |
|
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|
1472 |
| 12080 | 1473 // Rebuild the strong code root lists for each region |
| 1474 rebuild_strong_code_roots(); | |
| 1475 | |
|
10098
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|
1476 if (true) { // FIXME |
|
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|
1477 MetaspaceGC::compute_new_size(); |
|
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|
1478 } |
| 342 | 1479 |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1480 #ifdef TRACESPINNING |
|
10098
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|
1481 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1482 #endif |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
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545
diff
changeset
|
1483 |
|
10098
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|
1484 // Discard all rset updates |
|
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|
1485 JavaThread::dirty_card_queue_set().abandon_logs(); |
|
20504
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
1486 assert(dirty_card_queue_set().completed_buffers_num() == 0, "DCQS should be empty"); |
|
10098
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|
1487 |
|
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|
1488 _young_list->reset_sampled_info(); |
|
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|
1489 // At this point there should be no regions in the |
|
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|
1490 // entire heap tagged as young. |
|
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|
1491 assert(check_young_list_empty(true /* check_heap */), |
|
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|
1492 "young list should be empty at this point"); |
|
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|
1493 |
|
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changeset
|
1494 // Update the number of full collections that have been completed. |
|
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|
1495 increment_old_marking_cycles_completed(false /* concurrent */); |
|
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|
1496 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
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20359
diff
changeset
|
1497 _hrm.verify_optional(); |
|
10098
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|
1498 verify_region_sets_optional(); |
|
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|
1499 |
|
10373
3a4805ad0005
8015244: G1: Verification after a full GC is incorrectly placed.
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10372
diff
changeset
|
1500 verify_after_gc(); |
|
3a4805ad0005
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diff
changeset
|
1501 |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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20282
diff
changeset
|
1502 // Clear the previous marking bitmap, if needed for bitmap verification. |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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20282
diff
changeset
|
1503 // Note we cannot do this when we clear the next marking bitmap in |
|
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1504 // ConcurrentMark::abort() above since VerifyDuringGC verifies the |
|
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1505 // objects marked during a full GC against the previous bitmap. |
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1506 // But we need to clear it before calling check_bitmaps below since |
|
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1507 // the full GC has compacted objects and updated TAMS but not updated |
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1508 // the prev bitmap. |
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1509 if (G1VerifyBitmaps) { |
|
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1510 ((CMBitMap*) concurrent_mark()->prevMarkBitMap())->clearAll(); |
|
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|
1511 } |
|
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|
1512 check_bitmaps("Full GC End"); |
|
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1513 |
|
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1514 // Start a new incremental collection set for the next pause |
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1515 assert(g1_policy()->collection_set() == NULL, "must be"); |
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1516 g1_policy()->start_incremental_cset_building(); |
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1517 |
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1518 clear_cset_fast_test(); |
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1519 |
|
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1520 _allocator->init_mutator_alloc_region(); |
|
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1521 |
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1522 double end = os::elapsedTime(); |
|
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1523 g1_policy()->record_full_collection_end(); |
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1524 |
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1525 if (G1Log::fine()) { |
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1526 g1_policy()->print_heap_transition(); |
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1527 } |
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1528 |
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1529 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1530 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1531 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1532 // before any GC notifications are raised. |
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1533 g1mm()->update_sizes(); |
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1534 |
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1535 gc_epilogue(true); |
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1536 } |
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1537 |
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1538 if (G1Log::finer()) { |
|
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|
1539 g1_policy()->print_detailed_heap_transition(true /* full */); |
|
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1540 } |
|
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1541 |
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1542 print_heap_after_gc(); |
| 10405 | 1543 trace_heap_after_gc(gc_tracer); |
| 1544 | |
| 1545 post_full_gc_dump(gc_timer); | |
| 1546 | |
|
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1547 gc_timer->register_gc_end(); |
| 10405 | 1548 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
|
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1549 } |
| 1973 | 1550 |
| 1551 return true; | |
| 342 | 1552 } |
| 1553 | |
| 1554 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1555 // do_collection() will return whether it succeeded in performing |
| 1556 // the GC. Currently, there is no facility on the | |
| 1557 // do_full_collection() API to notify the caller than the collection | |
| 1558 // did not succeed (e.g., because it was locked out by the GC | |
| 1559 // locker). So, right now, we'll ignore the return value. | |
| 1560 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1561 clear_all_soft_refs, | |
| 1562 0 /* word_size */); | |
| 342 | 1563 } |
| 1564 | |
| 1565 // This code is mostly copied from TenuredGeneration. | |
| 1566 void | |
| 1567 G1CollectedHeap:: | |
| 1568 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1569 // Include the current allocation, if any, and bytes that will be | |
| 1570 // pre-allocated to support collections, as "used". | |
| 1571 const size_t used_after_gc = used(); | |
| 1572 const size_t capacity_after_gc = capacity(); | |
| 1573 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1574 | |
|
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1575 // This is enforced in arguments.cpp. |
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1576 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
|
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1577 "otherwise the code below doesn't make sense"); |
|
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1578 |
| 342 | 1579 // We don't have floating point command-line arguments |
|
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1580 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1581 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
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1582 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1583 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1584 | |
|
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1585 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1586 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1587 |
|
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1588 // We have to be careful here as these two calculations can overflow |
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1589 // 32-bit size_t's. |
|
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1590 double used_after_gc_d = (double) used_after_gc; |
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1591 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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|
1592 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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|
1593 |
|
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1594 // Let's make sure that they are both under the max heap size, which |
|
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1595 // by default will make them fit into a size_t. |
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|
1596 double desired_capacity_upper_bound = (double) max_heap_size; |
|
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|
1597 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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|
1598 desired_capacity_upper_bound); |
|
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|
1599 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
|
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|
1600 desired_capacity_upper_bound); |
|
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|
1601 |
|
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1602 // We can now safely turn them into size_t's. |
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1603 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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|
1604 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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|
1605 |
|
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|
1606 // This assert only makes sense here, before we adjust them |
|
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|
1607 // with respect to the min and max heap size. |
|
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|
1608 assert(minimum_desired_capacity <= maximum_desired_capacity, |
|
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|
1609 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
|
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|
1610 "maximum_desired_capacity = "SIZE_FORMAT, |
|
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|
1611 minimum_desired_capacity, maximum_desired_capacity)); |
|
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|
1612 |
|
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|
1613 // Should not be greater than the heap max size. No need to adjust |
|
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1614 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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|
1615 // we'll try to make the capacity larger than it, not smaller). |
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|
1616 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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|
1617 // Should not be less than the heap min size. No need to adjust it |
|
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1618 // with respect to the heap max size as it's an upper bound (i.e., |
|
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1619 // we'll try to make the capacity smaller than it, not greater). |
|
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|
1620 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1621 |
|
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|
1622 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1623 // Don't expand unless it's significant |
| 1624 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1625 ergo_verbose4(ErgoHeapSizing, |
|
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1626 "attempt heap expansion", |
|
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|
1627 ergo_format_reason("capacity lower than " |
|
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|
1628 "min desired capacity after Full GC") |
|
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|
1629 ergo_format_byte("capacity") |
|
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|
1630 ergo_format_byte("occupancy") |
|
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|
1631 ergo_format_byte_perc("min desired capacity"), |
|
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|
1632 capacity_after_gc, used_after_gc, |
|
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|
1633 minimum_desired_capacity, (double) MinHeapFreeRatio); |
|
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|
1634 expand(expand_bytes); |
| 342 | 1635 |
| 1636 // No expansion, now see if we want to shrink | |
|
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1637 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1638 // Capacity too large, compute shrinking size |
| 1639 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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|
1640 ergo_verbose4(ErgoHeapSizing, |
|
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1641 "attempt heap shrinking", |
|
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1642 ergo_format_reason("capacity higher than " |
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1643 "max desired capacity after Full GC") |
|
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1644 ergo_format_byte("capacity") |
|
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1645 ergo_format_byte("occupancy") |
|
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1646 ergo_format_byte_perc("max desired capacity"), |
|
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1647 capacity_after_gc, used_after_gc, |
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1648 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1649 shrink(shrink_bytes); |
| 1650 } | |
| 1651 } | |
| 1652 | |
| 1653 | |
| 1654 HeapWord* | |
| 1973 | 1655 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
|
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1656 AllocationContext_t context, |
| 1973 | 1657 bool* succeeded) { |
| 2152 | 1658 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1659 |
| 1660 *succeeded = true; | |
| 1661 // Let's attempt the allocation first. | |
|
2433
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1662 HeapWord* result = |
|
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1663 attempt_allocation_at_safepoint(word_size, |
|
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1664 context, |
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1665 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1666 if (result != NULL) { |
| 1667 assert(*succeeded, "sanity"); | |
| 1668 return result; | |
| 1669 } | |
| 342 | 1670 |
| 1671 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1672 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1673 // expansion over collection. (This might change in the future if we can | |
| 1674 // do something smarter than full collection to satisfy a failed alloc.) | |
|
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1675 result = expand_and_allocate(word_size, context); |
| 342 | 1676 if (result != NULL) { |
| 1973 | 1677 assert(*succeeded, "sanity"); |
| 342 | 1678 return result; |
| 1679 } | |
| 1680 | |
| 1973 | 1681 // Expansion didn't work, we'll try to do a Full GC. |
| 1682 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1683 false, /* clear_all_soft_refs */ | |
| 1684 word_size); | |
| 1685 if (!gc_succeeded) { | |
| 1686 *succeeded = false; | |
| 1687 return NULL; | |
| 1688 } | |
| 1689 | |
| 1690 // Retry the allocation | |
| 1691 result = attempt_allocation_at_safepoint(word_size, | |
|
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1692 context, |
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1693 true /* expect_null_mutator_alloc_region */); |
| 342 | 1694 if (result != NULL) { |
| 1973 | 1695 assert(*succeeded, "sanity"); |
| 342 | 1696 return result; |
| 1697 } | |
| 1698 | |
| 1973 | 1699 // Then, try a Full GC that will collect all soft references. |
| 1700 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1701 true, /* clear_all_soft_refs */ | |
| 1702 word_size); | |
| 1703 if (!gc_succeeded) { | |
| 1704 *succeeded = false; | |
| 1705 return NULL; | |
| 1706 } | |
| 1707 | |
| 1708 // Retry the allocation once more | |
| 1709 result = attempt_allocation_at_safepoint(word_size, | |
|
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1710 context, |
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1711 true /* expect_null_mutator_alloc_region */); |
| 342 | 1712 if (result != NULL) { |
| 1973 | 1713 assert(*succeeded, "sanity"); |
| 342 | 1714 return result; |
| 1715 } | |
| 1716 | |
|
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1717 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1718 "Flag should have been handled and cleared prior to this point"); |
|
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1719 |
| 342 | 1720 // What else? We might try synchronous finalization later. If the total |
| 1721 // space available is large enough for the allocation, then a more | |
| 1722 // complete compaction phase than we've tried so far might be | |
| 1723 // appropriate. | |
| 1973 | 1724 assert(*succeeded, "sanity"); |
| 342 | 1725 return NULL; |
| 1726 } | |
| 1727 | |
| 1728 // Attempting to expand the heap sufficiently | |
| 1729 // to support an allocation of the given "word_size". If | |
| 1730 // successful, perform the allocation and return the address of the | |
| 1731 // allocated block, or else "NULL". | |
| 1732 | |
|
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1733 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size, AllocationContext_t context) { |
| 2152 | 1734 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1735 | |
| 1736 verify_region_sets_optional(); | |
| 1973 | 1737 |
|
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1738 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1739 ergo_verbose1(ErgoHeapSizing, |
|
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1740 "attempt heap expansion", |
|
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1741 ergo_format_reason("allocation request failed") |
|
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1742 ergo_format_byte("allocation request"), |
|
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1743 word_size * HeapWordSize); |
|
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1744 if (expand(expand_bytes)) { |
|
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1745 _hrm.verify_optional(); |
|
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1746 verify_region_sets_optional(); |
|
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1747 return attempt_allocation_at_safepoint(word_size, |
|
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1748 context, |
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1749 false /* expect_null_mutator_alloc_region */); |
|
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1750 } |
|
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1751 return NULL; |
| 342 | 1752 } |
| 1753 | |
|
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1754 bool G1CollectedHeap::expand(size_t expand_bytes) { |
|
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1755 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1756 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1757 HeapRegion::GrainBytes); | |
|
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1758 ergo_verbose2(ErgoHeapSizing, |
|
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1759 "expand the heap", |
|
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1760 ergo_format_byte("requested expansion amount") |
|
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1761 ergo_format_byte("attempted expansion amount"), |
|
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1762 expand_bytes, aligned_expand_bytes); |
|
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1763 |
|
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1764 if (is_maximal_no_gc()) { |
|
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1765 ergo_verbose0(ErgoHeapSizing, |
|
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1766 "did not expand the heap", |
|
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1767 ergo_format_reason("heap already fully expanded")); |
|
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1768 return false; |
|
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|
1769 } |
|
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1770 |
|
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1771 uint regions_to_expand = (uint)(aligned_expand_bytes / HeapRegion::GrainBytes); |
|
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1772 assert(regions_to_expand > 0, "Must expand by at least one region"); |
|
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1773 |
|
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1774 uint expanded_by = _hrm.expand_by(regions_to_expand); |
|
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1775 |
|
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1776 if (expanded_by > 0) { |
|
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|
1777 size_t actual_expand_bytes = expanded_by * HeapRegion::GrainBytes; |
| 3766 | 1778 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); |
|
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1779 g1_policy()->record_new_heap_size(num_regions()); |
|
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1780 } else { |
|
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1781 ergo_verbose0(ErgoHeapSizing, |
|
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1782 "did not expand the heap", |
|
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|
1783 ergo_format_reason("heap expansion operation failed")); |
|
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1784 // The expansion of the virtual storage space was unsuccessful. |
|
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|
1785 // Let's see if it was because we ran out of swap. |
|
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1786 if (G1ExitOnExpansionFailure && |
|
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1787 _hrm.available() >= regions_to_expand) { |
|
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1788 // We had head room... |
|
10161
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|
1789 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
| 342 | 1790 } |
| 1791 } | |
|
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1792 return regions_to_expand > 0; |
| 342 | 1793 } |
| 1794 | |
| 3766 | 1795 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1796 size_t aligned_shrink_bytes = |
| 1797 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1798 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1799 HeapRegion::GrainBytes); | |
|
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1800 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
|
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1801 |
|
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1802 uint num_regions_removed = _hrm.shrink_by(num_regions_to_remove); |
|
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1803 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
|
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1804 |
|
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1805 ergo_verbose3(ErgoHeapSizing, |
|
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1806 "shrink the heap", |
|
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1807 ergo_format_byte("requested shrinking amount") |
|
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1808 ergo_format_byte("aligned shrinking amount") |
|
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|
1809 ergo_format_byte("attempted shrinking amount"), |
|
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1810 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
|
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1811 if (num_regions_removed > 0) { |
|
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1812 g1_policy()->record_new_heap_size(num_regions()); |
|
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1813 } else { |
|
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1814 ergo_verbose0(ErgoHeapSizing, |
|
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1815 "did not shrink the heap", |
|
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|
1816 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1817 } |
| 1818 } | |
| 1819 | |
| 1820 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1821 verify_region_sets_optional(); |
| 1822 | |
|
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1823 // We should only reach here at the end of a Full GC which means we |
|
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|
1824 // should not not be holding to any GC alloc regions. The method |
|
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|
1825 // below will make sure of that and do any remaining clean up. |
|
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1826 _allocator->abandon_gc_alloc_regions(); |
|
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1827 |
| 2152 | 1828 // Instead of tearing down / rebuilding the free lists here, we |
| 1829 // could instead use the remove_all_pending() method on free_list to | |
| 1830 // remove only the ones that we need to remove. | |
| 4072 | 1831 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1832 shrink_helper(shrink_bytes); |
| 4072 | 1833 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1834 |
|
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1835 _hrm.verify_optional(); |
| 2152 | 1836 verify_region_sets_optional(); |
| 342 | 1837 } |
| 1838 | |
| 1839 // Public methods. | |
| 1840 | |
| 1841 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1842 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1843 #endif // _MSC_VER | |
| 1844 | |
| 1845 | |
| 1846 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1847 SharedHeap(policy_), | |
| 1848 _g1_policy(policy_), | |
| 1111 | 1849 _dirty_card_queue_set(false), |
| 1705 | 1850 _into_cset_dirty_card_queue_set(false), |
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1851 _is_alive_closure_cm(this), |
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1852 _is_alive_closure_stw(this), |
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1853 _ref_processor_cm(NULL), |
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1854 _ref_processor_stw(NULL), |
| 342 | 1855 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1856 _bot_shared(NULL), | |
| 10405 | 1857 _evac_failure_scan_stack(NULL), |
| 342 | 1858 _mark_in_progress(false), |
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1859 _cg1r(NULL), |
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1860 _g1mm(NULL), |
| 342 | 1861 _refine_cte_cl(NULL), |
| 1862 _full_collection(false), | |
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1863 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1864 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1865 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
|
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1866 _humongous_is_live(), |
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1867 _has_humongous_reclaim_candidates(false), |
| 2152 | 1868 _free_regions_coming(false), |
| 342 | 1869 _young_list(new YoungList(this)), |
| 1870 _gc_time_stamp(0), | |
| 6595 | 1871 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1872 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1873 _expand_heap_after_alloc_failure(true), |
| 526 | 1874 _surviving_young_words(NULL), |
|
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1875 _old_marking_cycles_started(0), |
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1876 _old_marking_cycles_completed(0), |
| 10405 | 1877 _concurrent_cycle_started(false), |
|
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1878 _in_cset_fast_test(), |
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1879 _dirty_cards_region_list(NULL), |
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1880 _worker_cset_start_region(NULL), |
| 10405 | 1881 _worker_cset_start_region_time_stamp(NULL), |
| 1882 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
| 1883 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
| 1884 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
| 1885 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
| 1886 | |
| 1887 _g1h = this; | |
| 342 | 1888 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
| 1889 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1890 } | |
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1891 |
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1892 _allocator = G1Allocator::create_allocator(_g1h); |
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1893 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1894 |
| 342 | 1895 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1896 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1897 | |
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1898 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
| 342 | 1899 assert(n_rem_sets > 0, "Invariant."); |
| 1900 | |
| 6197 | 1901 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1902 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
| 10405 | 1903 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
|
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1904 |
| 342 | 1905 for (int i = 0; i < n_queues; i++) { |
| 1906 RefToScanQueue* q = new RefToScanQueue(); | |
| 1907 q->initialize(); | |
| 1908 _task_queues->register_queue(i, q); | |
| 10405 | 1909 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
| 1910 } | |
|
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1911 clear_cset_start_regions(); |
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1912 |
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1913 // Initialize the G1EvacuationFailureALot counters and flags. |
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1914 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1915 |
| 342 | 1916 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1917 } | |
| 1918 | |
| 1919 jint G1CollectedHeap::initialize() { | |
| 1166 | 1920 CollectedHeap::pre_initialize(); |
| 342 | 1921 os::enable_vtime(); |
| 1922 | |
|
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1923 G1Log::init(); |
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1924 |
| 342 | 1925 // Necessary to satisfy locking discipline assertions. |
| 1926 | |
| 1927 MutexLocker x(Heap_lock); | |
| 1928 | |
|
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1929 // We have to initialize the printer before committing the heap, as |
|
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1930 // it will be used then. |
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1931 _hr_printer.set_active(G1PrintHeapRegions); |
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1932 |
| 342 | 1933 // While there are no constraints in the GC code that HeapWordSize |
| 1934 // be any particular value, there are multiple other areas in the | |
| 1935 // system which believe this to be true (e.g. oop->object_size in some | |
| 1936 // cases incorrectly returns the size in wordSize units rather than | |
| 1937 // HeapWordSize). | |
| 1938 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 1939 | |
| 1940 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 1941 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
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1942 size_t heap_alignment = collector_policy()->heap_alignment(); |
| 342 | 1943 |
| 1944 // Ensure that the sizes are properly aligned. | |
| 1945 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1946 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
|
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1947 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
| 342 | 1948 |
|
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1949 _refine_cte_cl = new RefineCardTableEntryClosure(); |
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1950 |
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1951 _cg1r = new ConcurrentG1Refine(this, _refine_cte_cl); |
| 342 | 1952 |
| 1953 // Reserve the maximum. | |
|
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1954 |
|
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1955 // When compressed oops are enabled, the preferred heap base |
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1956 // is calculated by subtracting the requested size from the |
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1957 // 32Gb boundary and using the result as the base address for |
|
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1958 // heap reservation. If the requested size is not aligned to |
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1959 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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1960 // into the ReservedHeapSpace constructor) then the actual |
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1961 // base of the reserved heap may end up differing from the |
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1962 // address that was requested (i.e. the preferred heap base). |
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1963 // If this happens then we could end up using a non-optimal |
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1964 // compressed oops mode. |
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1965 |
|
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1966 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
|
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1967 heap_alignment); |
| 342 | 1968 |
| 1969 // It is important to do this in a way such that concurrent readers can't | |
| 10405 | 1970 // temporarily think something is in the heap. (I've actually seen this |
| 342 | 1971 // happen in asserts: DLD.) |
| 1972 _reserved.set_word_size(0); | |
| 1973 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 1974 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 1975 | |
| 1976 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 1977 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 1978 set_barrier_set(rem_set()->bs()); | |
| 12343 | 1979 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
| 1980 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
| 342 | 1981 return JNI_ENOMEM; |
| 1982 } | |
| 1983 | |
| 1984 // Also create a G1 rem set. | |
| 12343 | 1985 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
| 342 | 1986 |
| 1987 // Carve out the G1 part of the heap. | |
| 1988 | |
|
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1989 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); |
| 20337 | 1990 G1RegionToSpaceMapper* heap_storage = |
| 1991 G1RegionToSpaceMapper::create_mapper(g1_rs, | |
| 1992 UseLargePages ? os::large_page_size() : os::vm_page_size(), | |
| 1993 HeapRegion::GrainBytes, | |
| 1994 1, | |
| 1995 mtJavaHeap); | |
| 1996 heap_storage->set_mapping_changed_listener(&_listener); | |
| 1997 | |
| 1998 // Reserve space for the block offset table. We do not support automatic uncommit | |
| 1999 // for the card table at this time. BOT only. | |
| 2000 ReservedSpace bot_rs(G1BlockOffsetSharedArray::compute_size(g1_rs.size() / HeapWordSize)); | |
| 2001 G1RegionToSpaceMapper* bot_storage = | |
| 2002 G1RegionToSpaceMapper::create_mapper(bot_rs, | |
| 2003 os::vm_page_size(), | |
| 2004 HeapRegion::GrainBytes, | |
| 2005 G1BlockOffsetSharedArray::N_bytes, | |
| 2006 mtGC); | |
| 2007 | |
| 2008 ReservedSpace cardtable_rs(G1SATBCardTableLoggingModRefBS::compute_size(g1_rs.size() / HeapWordSize)); | |
| 2009 G1RegionToSpaceMapper* cardtable_storage = | |
| 2010 G1RegionToSpaceMapper::create_mapper(cardtable_rs, | |
| 2011 os::vm_page_size(), | |
| 2012 HeapRegion::GrainBytes, | |
| 2013 G1BlockOffsetSharedArray::N_bytes, | |
| 2014 mtGC); | |
| 2015 | |
| 2016 // Reserve space for the card counts table. | |
| 2017 ReservedSpace card_counts_rs(G1BlockOffsetSharedArray::compute_size(g1_rs.size() / HeapWordSize)); | |
| 2018 G1RegionToSpaceMapper* card_counts_storage = | |
| 2019 G1RegionToSpaceMapper::create_mapper(card_counts_rs, | |
| 2020 os::vm_page_size(), | |
| 2021 HeapRegion::GrainBytes, | |
| 2022 G1BlockOffsetSharedArray::N_bytes, | |
| 2023 mtGC); | |
| 2024 | |
| 2025 // Reserve space for prev and next bitmap. | |
| 2026 size_t bitmap_size = CMBitMap::compute_size(g1_rs.size()); | |
| 2027 | |
| 2028 ReservedSpace prev_bitmap_rs(ReservedSpace::allocation_align_size_up(bitmap_size)); | |
| 2029 G1RegionToSpaceMapper* prev_bitmap_storage = | |
| 2030 G1RegionToSpaceMapper::create_mapper(prev_bitmap_rs, | |
| 2031 os::vm_page_size(), | |
| 2032 HeapRegion::GrainBytes, | |
| 2033 CMBitMap::mark_distance(), | |
| 2034 mtGC); | |
| 2035 | |
| 2036 ReservedSpace next_bitmap_rs(ReservedSpace::allocation_align_size_up(bitmap_size)); | |
| 2037 G1RegionToSpaceMapper* next_bitmap_storage = | |
| 2038 G1RegionToSpaceMapper::create_mapper(next_bitmap_rs, | |
| 2039 os::vm_page_size(), | |
| 2040 HeapRegion::GrainBytes, | |
| 2041 CMBitMap::mark_distance(), | |
| 2042 mtGC); | |
| 2043 | |
|
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2044 _hrm.initialize(heap_storage, prev_bitmap_storage, next_bitmap_storage, bot_storage, cardtable_storage, card_counts_storage); |
| 20337 | 2045 g1_barrier_set()->initialize(cardtable_storage); |
| 2046 // Do later initialization work for concurrent refinement. | |
| 2047 _cg1r->init(card_counts_storage); | |
|
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2048 |
|
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2049 // 6843694 - ensure that the maximum region index can fit |
|
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2050 // in the remembered set structures. |
|
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2051 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
|
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2052 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
|
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2053 |
|
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2054 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
|
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2055 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
|
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2056 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
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2057 "too many cards per region"); |
|
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2058 |
|
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2059 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
| 2152 | 2060 |
| 20337 | 2061 _bot_shared = new G1BlockOffsetSharedArray(_reserved, bot_storage); |
| 342 | 2062 |
| 2063 _g1h = this; | |
| 2064 | |
|
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2065 _in_cset_fast_test.initialize(_hrm.reserved().start(), _hrm.reserved().end(), HeapRegion::GrainBytes); |
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changeset
|
2066 _humongous_is_live.initialize(_hrm.reserved().start(), _hrm.reserved().end(), HeapRegion::GrainBytes); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2067 |
| 342 | 2068 // Create the ConcurrentMark data structure and thread. |
| 2069 // (Must do this late, so that "max_regions" is defined.) | |
| 20337 | 2070 _cm = new ConcurrentMark(this, prev_bitmap_storage, next_bitmap_storage); |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2071 if (_cm == NULL || !_cm->completed_initialization()) { |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2072 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2073 return JNI_ENOMEM; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2074 } |
| 342 | 2075 _cmThread = _cm->cmThread(); |
| 2076 | |
| 2077 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2078 HeapRegionRemSet::init_heap(max_regions()); | |
| 2079 | |
| 677 | 2080 // Now expand into the initial heap size. |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2081 if (!expand(init_byte_size)) { |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2082 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2083 return JNI_ENOMEM; |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2084 } |
| 342 | 2085 |
| 2086 // Perform any initialization actions delegated to the policy. | |
| 2087 g1_policy()->init(); | |
| 2088 | |
| 2089 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2090 SATB_Q_FL_lock, | |
| 1111 | 2091 G1SATBProcessCompletedThreshold, |
| 342 | 2092 Shared_SATB_Q_lock); |
| 794 | 2093 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2094 JavaThread::dirty_card_queue_set().initialize(_refine_cte_cl, |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2095 DirtyCardQ_CBL_mon, |
| 794 | 2096 DirtyCardQ_FL_lock, |
| 1111 | 2097 concurrent_g1_refine()->yellow_zone(), |
| 2098 concurrent_g1_refine()->red_zone(), | |
| 794 | 2099 Shared_DirtyCardQ_lock); |
| 2100 | |
|
20504
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2101 dirty_card_queue_set().initialize(NULL, // Should never be called by the Java code |
|
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2102 DirtyCardQ_CBL_mon, |
|
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2103 DirtyCardQ_FL_lock, |
|
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2104 -1, // never trigger processing |
|
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2105 -1, // no limit on length |
|
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2106 Shared_DirtyCardQ_lock, |
|
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2107 &JavaThread::dirty_card_queue_set()); |
| 1705 | 2108 |
| 2109 // Initialize the card queue set used to hold cards containing | |
| 2110 // references into the collection set. | |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2111 _into_cset_dirty_card_queue_set.initialize(NULL, // Should never be called by the Java code |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2112 DirtyCardQ_CBL_mon, |
| 1705 | 2113 DirtyCardQ_FL_lock, |
| 2114 -1, // never trigger processing | |
| 2115 -1, // no limit on length | |
| 2116 Shared_DirtyCardQ_lock, | |
| 2117 &JavaThread::dirty_card_queue_set()); | |
| 2118 | |
| 342 | 2119 // In case we're keeping closure specialization stats, initialize those |
| 2120 // counts and that mechanism. | |
| 2121 SpecializationStats::clear(); | |
| 2122 | |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2123 // Here we allocate the dummy HeapRegion that is required by the |
|
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2124 // G1AllocRegion class. |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2125 HeapRegion* dummy_region = _hrm.get_dummy_region(); |
| 20337 | 2126 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2127 // We'll re-use the same region whether the alloc region will |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2128 // require BOT updates or not and, if it doesn't, then a non-young |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2129 // region will complain that it cannot support allocations without |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
2130 // BOT updates. So we'll tag the dummy region as eden to avoid that. |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
2131 dummy_region->set_eden(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2132 // Make sure it's full. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2133 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2134 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2135 |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2136 _allocator->init_mutator_alloc_region(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2137 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2138 // Do create of the monitoring and management support so that |
|
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2139 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2140 _g1mm = new G1MonitoringSupport(this); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2141 |
| 17764 | 2142 G1StringDedup::initialize(); |
| 2143 | |
| 342 | 2144 return JNI_OK; |
| 2145 } | |
| 2146 | |
|
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2147 void G1CollectedHeap::stop() { |
| 17992 | 2148 // Stop all concurrent threads. We do this to make sure these threads |
| 2149 // do not continue to execute and access resources (e.g. gclog_or_tty) | |
|
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2150 // that are destroyed during shutdown. |
| 17992 | 2151 _cg1r->stop(); |
| 2152 _cmThread->stop(); | |
| 2153 if (G1StringDedup::is_enabled()) { | |
| 2154 G1StringDedup::stop(); | |
| 2155 } | |
|
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2156 } |
|
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2157 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2158 void G1CollectedHeap::clear_humongous_is_live_table() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2159 guarantee(G1ReclaimDeadHumongousObjectsAtYoungGC, "Should only be called if true"); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2160 _humongous_is_live.clear(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2161 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2162 |
|
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2163 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2164 return HeapRegion::max_region_size(); |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2165 } |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2166 |
| 342 | 2167 void G1CollectedHeap::ref_processing_init() { |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2168 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2169 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2170 // * There are two reference processor instances. One is |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2171 // used to record and process discovered references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2172 // during concurrent marking; the other is used to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2173 // record and process references during STW pauses |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2174 // (both full and incremental). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2175 // * Both ref processors need to 'span' the entire heap as |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2176 // the regions in the collection set may be dotted around. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2177 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2178 // * For the concurrent marking ref processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2179 // * Reference discovery is enabled at initial marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2180 // * Reference discovery is disabled and the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2181 // references processed etc during remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2182 // * Reference discovery is MT (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2183 // * Reference discovery requires a barrier (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2184 // * Reference processing may or may not be MT |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2185 // (depending on the value of ParallelRefProcEnabled |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2186 // and ParallelGCThreads). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2187 // * A full GC disables reference discovery by the CM |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2188 // ref processor and abandons any entries on it's |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2189 // discovered lists. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2190 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2191 // * For the STW processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2192 // * Non MT discovery is enabled at the start of a full GC. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2193 // * Processing and enqueueing during a full GC is non-MT. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2194 // * During a full GC, references are processed after marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2195 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2196 // * Discovery (may or may not be MT) is enabled at the start |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2197 // of an incremental evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 // * References are processed near the end of a STW evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2199 // * For both types of GC: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 // * Discovery is atomic - i.e. not concurrent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // * Reference discovery will not need a barrier. |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2202 |
| 342 | 2203 SharedHeap::ref_processing_init(); |
| 2204 MemRegion mr = reserved_region(); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2206 // Concurrent Mark ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2207 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2208 new ReferenceProcessor(mr, // span |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2210 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 (int) ParallelGCThreads, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 // mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2217 false, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2218 // Reference discovery is not atomic |
|
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
parents:
17948
diff
changeset
|
2219 &_is_alive_closure_cm); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2220 // is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2221 // (for efficiency/performance) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2223 // STW ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2224 _ref_processor_stw = |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
2225 new ReferenceProcessor(mr, // span |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
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|
2226 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
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|
2227 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2228 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
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|
2229 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2230 (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
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|
2231 // mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2232 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2233 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2234 true, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2235 // Reference discovery is atomic |
|
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
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17948
diff
changeset
|
2236 &_is_alive_closure_stw); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
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|
2237 // is alive closure |
|
4dfb2df418f2
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diff
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|
2238 // (for efficiency/performance) |
| 342 | 2239 } |
| 2240 | |
| 2241 size_t G1CollectedHeap::capacity() const { | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
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20359
diff
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|
2242 return _hrm.length() * HeapRegion::GrainBytes; |
| 342 | 2243 } |
| 2244 | |
|
6254
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|
2245 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
|
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|
2246 assert(!hr->continuesHumongous(), "pre-condition"); |
|
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|
2247 hr->reset_gc_time_stamp(); |
|
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|
2248 if (hr->startsHumongous()) { |
|
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8054819: Rename HeapRegionSeq to HeapRegionManager
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|
2249 uint first_index = hr->hrm_index() + 1; |
|
6254
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|
2250 uint last_index = hr->last_hc_index(); |
|
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|
2251 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2252 HeapRegion* chr = region_at(i); |
|
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|
2253 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2254 chr->reset_gc_time_stamp(); |
|
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|
2255 } |
|
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|
2256 } |
|
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|
2257 } |
|
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|
2258 |
|
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|
2259 #ifndef PRODUCT |
|
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|
2260 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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|
2261 private: |
|
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|
2262 unsigned _gc_time_stamp; |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2263 bool _failures; |
|
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|
2264 |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2265 public: |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2266 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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|
2267 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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|
2268 |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2269 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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|
2270 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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|
2271 if (_gc_time_stamp != region_gc_time_stamp) { |
|
a2f7274eb6ef
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|
2272 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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parents:
6220
diff
changeset
|
2273 "expected %d", HR_FORMAT_PARAMS(hr), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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changeset
|
2274 region_gc_time_stamp, _gc_time_stamp); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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changeset
|
2275 _failures = true; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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changeset
|
2276 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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diff
changeset
|
2277 return false; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2278 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2279 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
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changeset
|
2280 bool failures() { return _failures; } |
|
a2f7274eb6ef
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 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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changeset
|
2283 void G1CollectedHeap::check_gc_time_stamps() { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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6220
diff
changeset
|
2284 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2285 heap_region_iterate(&cl); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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6220
diff
changeset
|
2286 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
|
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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parents:
6220
diff
changeset
|
2288 #endif // PRODUCT |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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6220
diff
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|
2289 |
| 1705 | 2290 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2291 DirtyCardQueue* into_cset_dcq, | |
| 2292 bool concurrent, | |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2293 uint worker_i) { |
| 889 | 2294 // 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
|
2295 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
|
2296 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2297 |
| 342 | 2298 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2299 int n_completed_buffers = 0; | |
| 1705 | 2300 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2301 n_completed_buffers++; |
| 2302 } | |
|
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
|
2303 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
| 342 | 2304 dcqs.clear_n_completed_buffers(); |
| 2305 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2306 } | |
| 2307 | |
| 2308 | |
| 2309 // Computes the sum of the storage used by the various regions. | |
| 2310 size_t G1CollectedHeap::used() const { | |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2311 return _allocator->used(); |
| 342 | 2312 } |
| 2313 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2314 size_t G1CollectedHeap::used_unlocked() const { |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2315 return _allocator->used_unlocked(); |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2316 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2317 |
| 342 | 2318 class SumUsedClosure: public HeapRegionClosure { |
| 2319 size_t _used; | |
| 2320 public: | |
| 2321 SumUsedClosure() : _used(0) {} | |
| 2322 bool doHeapRegion(HeapRegion* r) { | |
| 2323 if (!r->continuesHumongous()) { | |
| 2324 _used += r->used(); | |
| 2325 } | |
| 2326 return false; | |
| 2327 } | |
| 2328 size_t result() { return _used; } | |
| 2329 }; | |
| 2330 | |
| 2331 size_t G1CollectedHeap::recalculate_used() const { | |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2332 double recalculate_used_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2333 |
| 342 | 2334 SumUsedClosure blk; |
| 3766 | 2335 heap_region_iterate(&blk); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2336 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2337 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
| 342 | 2338 return blk.result(); |
| 2339 } | |
| 2340 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2341 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
|
2342 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2343 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
|
2344 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
|
2345 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
|
2346 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2347 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2348 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2349 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2350 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2351 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2352 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2353 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2354 // 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
|
2355 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2356 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2357 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2358 // Let's use the existing mechanism for the allocation |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2359 HeapWord* dummy_obj = humongous_obj_allocate(word_size, |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2360 AllocationContext::system()); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2361 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2362 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2363 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2364 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2365 // 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
|
2366 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2367 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2368 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2369 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2370 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2371 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2372 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2373 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
|
2374 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
|
2375 _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
|
2376 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
|
2377 _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
|
2378 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2379 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2380 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2381 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2382 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
|
2383 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2384 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2385 // 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
|
2386 // 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
|
2387 // 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
|
2388 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2389 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2390 // 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
|
2391 // 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
|
2392 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2393 // 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
|
2394 // 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
|
2395 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2396 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2397 // 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
|
2398 assert(concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2399 (_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
|
2400 (_old_marking_cycles_started == _old_marking_cycles_completed + 2), |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2401 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
|
2402 "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
|
2403 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2404 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2405 // 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
|
2406 assert(!concurrent || |
|
6120
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), |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2408 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
|
2409 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2410 "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
|
2411 _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
|
2412 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2413 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2414 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2415 // 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
|
2416 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2417 // is set) so that if a waiter requests another System.gc() it doesn't |
| 10405 | 2418 // 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
|
2419 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2420 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2421 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2422 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2423 // 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
|
2424 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2425 // and it's waiting for a full GC to finish will be woken up. It is |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2426 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2427 FullGCCount_lock->notify_all(); |
|
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 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2430 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
| 10405 | 2431 _concurrent_cycle_started = true; |
| 2432 _gc_timer_cm->register_gc_start(start_time); | |
| 2433 | |
| 2434 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
| 2435 trace_heap_before_gc(_gc_tracer_cm); | |
| 2436 } | |
| 2437 | |
| 2438 void G1CollectedHeap::register_concurrent_cycle_end() { | |
| 2439 if (_concurrent_cycle_started) { | |
| 2440 if (_cm->has_aborted()) { | |
| 2441 _gc_tracer_cm->report_concurrent_mode_failure(); | |
| 2442 } | |
|
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2443 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2444 _gc_timer_cm->register_gc_end(); |
| 10405 | 2445 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
| 2446 | |
| 2447 _concurrent_cycle_started = false; | |
| 2448 } | |
| 2449 } | |
| 2450 | |
| 2451 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
| 2452 if (_concurrent_cycle_started) { | |
| 2453 trace_heap_after_gc(_gc_tracer_cm); | |
| 2454 } | |
| 2455 } | |
| 2456 | |
| 2457 G1YCType G1CollectedHeap::yc_type() { | |
| 2458 bool is_young = g1_policy()->gcs_are_young(); | |
| 2459 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
| 2460 bool is_during_mark = mark_in_progress(); | |
| 2461 | |
| 2462 if (is_initial_mark) { | |
| 2463 return InitialMark; | |
| 2464 } else if (is_during_mark) { | |
| 2465 return DuringMark; | |
| 2466 } else if (is_young) { | |
| 2467 return Normal; | |
| 2468 } else { | |
| 2469 return Mixed; | |
| 2470 } | |
| 2471 } | |
| 2472 | |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2473 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
|
2474 assert_heap_not_locked(); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2475 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2476 unsigned int gc_count_before; |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2477 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
|
2478 bool retry_gc; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2479 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2480 do { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2481 retry_gc = false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2482 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2483 { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2484 MutexLocker ml(Heap_lock); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2485 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2486 // 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
|
2487 gc_count_before = total_collections(); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2488 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
|
2489 } |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2490 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2491 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
|
2492 // 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
|
2493 // 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
|
2494 // we are not requesting a post-GC allocation. |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2495 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2496 0, /* word_size */ |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2497 true, /* should_initiate_conc_mark */ |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2498 g1_policy()->max_pause_time_ms(), |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2499 cause); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2500 op.set_allocation_context(AllocationContext::current()); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2501 |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2502 VMThread::execute(&op); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2503 if (!op.pause_succeeded()) { |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2504 if (old_marking_count_before == _old_marking_cycles_started) { |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2505 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
|
2506 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2507 // 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
|
2508 // 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
|
2509 // 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
|
2510 } |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2511 |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2512 if (retry_gc) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2513 if (GC_locker::is_active_and_needs_gc()) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2514 GC_locker::stall_until_clear(); |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2515 } |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2516 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2517 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2518 } else { |
|
20357
4bfc44ba0d19
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
20337
diff
changeset
|
2519 if (cause == GCCause::_gc_locker || cause == GCCause::_wb_young_gc |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
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|
2520 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
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2521 |
|
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|
2522 // Schedule a standard evacuation pause. We're setting word_size |
|
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|
2523 // to 0 which means that we are not requesting a post-GC allocation. |
|
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|
2524 VM_G1IncCollectionPause op(gc_count_before, |
|
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2525 0, /* word_size */ |
|
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|
2526 false, /* should_initiate_conc_mark */ |
|
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|
2527 g1_policy()->max_pause_time_ms(), |
|
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|
2528 cause); |
|
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|
2529 VMThread::execute(&op); |
|
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|
2530 } else { |
|
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|
2531 // Schedule a Full GC. |
|
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|
2532 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
|
4910
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|
2533 VMThread::execute(&op); |
|
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|
2534 } |
|
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|
2535 } |
|
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|
2536 } while (retry_gc); |
| 342 | 2537 } |
| 2538 | |
| 2539 bool G1CollectedHeap::is_in(const void* p) const { | |
|
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|
2540 if (_hrm.reserved().contains(p)) { |
| 20337 | 2541 // Given that we know that p is in the reserved space, |
| 4708 | 2542 // heap_region_containing_raw() should successfully |
| 2543 // return the containing region. | |
| 2544 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2545 return hr->is_in(p); |
| 2546 } else { | |
|
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|
2547 return false; |
| 342 | 2548 } |
| 2549 } | |
| 2550 | |
| 20337 | 2551 #ifdef ASSERT |
| 2552 bool G1CollectedHeap::is_in_exact(const void* p) const { | |
| 2553 bool contains = reserved_region().contains(p); | |
|
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|
2554 bool available = _hrm.is_available(addr_to_region((HeapWord*)p)); |
| 20337 | 2555 if (contains && available) { |
| 2556 return true; | |
| 2557 } else { | |
| 2558 return false; | |
| 2559 } | |
| 2560 } | |
| 2561 #endif | |
| 2562 | |
| 342 | 2563 // Iteration functions. |
| 2564 | |
|
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|
2565 // Applies an ExtendedOopClosure onto all references of objects within a HeapRegion. |
| 342 | 2566 |
| 2567 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
|
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|
2568 ExtendedOopClosure* _cl; |
| 342 | 2569 public: |
|
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|
2570 IterateOopClosureRegionClosure(ExtendedOopClosure* cl) : _cl(cl) {} |
| 342 | 2571 bool doHeapRegion(HeapRegion* r) { |
|
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2572 if (!r->continuesHumongous()) { |
| 342 | 2573 r->oop_iterate(_cl); |
| 2574 } | |
| 2575 return false; | |
| 2576 } | |
| 2577 }; | |
| 2578 | |
|
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2579 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
|
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|
2580 IterateOopClosureRegionClosure blk(cl); |
| 3766 | 2581 heap_region_iterate(&blk); |
| 342 | 2582 } |
| 2583 | |
| 2584 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2585 | |
| 2586 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2587 ObjectClosure* _cl; | |
| 2588 public: | |
| 2589 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2590 bool doHeapRegion(HeapRegion* r) { | |
| 2591 if (! r->continuesHumongous()) { | |
| 2592 r->object_iterate(_cl); | |
| 2593 } | |
| 2594 return false; | |
| 2595 } | |
| 2596 }; | |
| 2597 | |
|
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|
2598 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
| 342 | 2599 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2600 heap_region_iterate(&blk); |
| 342 | 2601 } |
| 2602 | |
| 2603 // Calls a SpaceClosure on a HeapRegion. | |
| 2604 | |
| 2605 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2606 SpaceClosure* _cl; | |
| 2607 public: | |
| 2608 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2609 bool doHeapRegion(HeapRegion* r) { | |
| 2610 _cl->do_space(r); | |
| 2611 return false; | |
| 2612 } | |
| 2613 }; | |
| 2614 | |
| 2615 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2616 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2617 heap_region_iterate(&blk); |
| 342 | 2618 } |
| 2619 | |
| 3766 | 2620 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
|
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|
2621 _hrm.iterate(cl); |
| 342 | 2622 } |
| 2623 | |
| 2624 void | |
| 2625 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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|
2626 uint worker_id, |
|
20336
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|
2627 uint num_workers, |
|
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|
2628 jint claim_value) const { |
|
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|
2629 _hrm.par_iterate(cl, worker_id, num_workers, claim_value); |
| 355 | 2630 } |
| 2631 | |
| 390 | 2632 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2633 public: | |
| 2634 bool doHeapRegion(HeapRegion* r) { | |
| 2635 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2636 return false; | |
| 2637 } | |
| 2638 }; | |
| 2639 | |
|
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|
2640 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2641 ResetClaimValuesClosure blk; |
| 2642 heap_region_iterate(&blk); | |
| 2643 } | |
| 2644 | |
|
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|
2645 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
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|
2646 ResetClaimValuesClosure blk; |
|
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|
2647 collection_set_iterate(&blk); |
|
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|
2648 } |
|
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|
2649 |
| 355 | 2650 #ifdef ASSERT |
| 2651 // This checks whether all regions in the heap have the correct claim | |
| 2652 // value. I also piggy-backed on this a check to ensure that the | |
| 2653 // humongous_start_region() information on "continues humongous" | |
| 2654 // regions is correct. | |
| 2655 | |
| 2656 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2657 private: | |
| 2658 jint _claim_value; | |
|
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|
2659 uint _failures; |
| 355 | 2660 HeapRegion* _sh_region; |
|
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|
2661 |
| 355 | 2662 public: |
| 2663 CheckClaimValuesClosure(jint claim_value) : | |
| 2664 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2665 bool doHeapRegion(HeapRegion* r) { | |
| 2666 if (r->claim_value() != _claim_value) { | |
|
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|
2667 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2668 "claim value = %d, should be %d", |
|
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|
2669 HR_FORMAT_PARAMS(r), |
|
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|
2670 r->claim_value(), _claim_value); |
| 355 | 2671 ++_failures; |
| 2672 } | |
| 2673 if (!r->isHumongous()) { | |
| 2674 _sh_region = NULL; | |
| 2675 } else if (r->startsHumongous()) { | |
| 2676 _sh_region = r; | |
| 2677 } else if (r->continuesHumongous()) { | |
| 2678 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2679 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2680 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2681 HR_FORMAT_PARAMS(r), |
| 355 | 2682 r->humongous_start_region(), |
| 2683 _sh_region); | |
| 2684 ++_failures; | |
| 342 | 2685 } |
| 2686 } | |
| 355 | 2687 return false; |
| 2688 } | |
|
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|
2689 uint failures() { return _failures; } |
| 355 | 2690 }; |
| 2691 | |
| 2692 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2693 CheckClaimValuesClosure cl(claim_value); | |
| 2694 heap_region_iterate(&cl); | |
| 2695 return cl.failures() == 0; | |
| 2696 } | |
|
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|
2697 |
|
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|
2698 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
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|
2699 private: |
|
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|
2700 jint _claim_value; |
|
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|
2701 uint _failures; |
|
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|
2702 |
|
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|
2703 public: |
|
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|
2704 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
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|
2705 _claim_value(claim_value), _failures(0) { } |
|
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|
2706 |
|
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|
2707 uint failures() { return _failures; } |
|
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|
2708 |
|
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|
2709 bool doHeapRegion(HeapRegion* hr) { |
|
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|
2710 assert(hr->in_collection_set(), "how?"); |
|
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|
2711 assert(!hr->isHumongous(), "H-region in CSet"); |
|
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|
2712 if (hr->claim_value() != _claim_value) { |
|
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|
2713 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
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|
2714 "claim value = %d, should be %d", |
|
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|
2715 HR_FORMAT_PARAMS(hr), |
|
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|
2716 hr->claim_value(), _claim_value); |
|
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|
2717 _failures += 1; |
|
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|
2718 } |
|
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|
2719 return false; |
|
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|
2720 } |
|
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|
2721 }; |
|
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|
2722 |
|
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|
2723 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
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|
2724 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2725 collection_set_iterate(&cl); |
|
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|
2726 return cl.failures() == 0; |
|
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|
2727 } |
| 355 | 2728 #endif // ASSERT |
| 342 | 2729 |
|
4709
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|
2730 // Clear the cached CSet starting regions and (more importantly) |
|
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|
2731 // the time stamps. Called when we reset the GC time stamp. |
|
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|
2732 void G1CollectedHeap::clear_cset_start_regions() { |
|
fd2b426c30db
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|
2733 assert(_worker_cset_start_region != NULL, "sanity"); |
|
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|
2734 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
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|
2735 |
|
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|
2736 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
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|
2737 for (int i = 0; i < n_queues; i++) { |
|
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|
2738 _worker_cset_start_region[i] = NULL; |
|
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|
2739 _worker_cset_start_region_time_stamp[i] = 0; |
|
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|
2740 } |
|
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diff
changeset
|
2741 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2742 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2743 // Given the id of a worker, obtain or calculate a suitable |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2744 // 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
|
2745 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
|
2746 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
|
2747 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2748 HeapRegion* result = NULL; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2749 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
|
2750 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2751 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
|
2752 // 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
|
2753 // 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
|
2754 // 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
|
2755 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2756 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
|
2757 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
|
2758 return result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2759 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2760 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2761 // 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
|
2762 // 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
|
2763 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2764 // 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
|
2765 // 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
|
2766 // avoid contention. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2767 // If we have: |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2768 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2769 // p threads |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2770 // 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
|
2771 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2772 result = g1_policy()->collection_set(); |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2773 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2774 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
|
2775 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
|
2776 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2777 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2778 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2779 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2780 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
|
2781 uint start_ind = 0; |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2782 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2783 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2784 _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
|
2785 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2786 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2787 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
|
2788 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
|
2789 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2790 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2791 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
|
2792 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2793 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2794 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2795 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2796 // 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
|
2797 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2798 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
|
2799 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
|
2800 "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
|
2801 _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
|
2802 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2803 _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
|
2804 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2805 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2806 |
| 342 | 2807 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2808 HeapRegion* r = g1_policy()->collection_set(); | |
| 2809 while (r != NULL) { | |
| 2810 HeapRegion* next = r->next_in_collection_set(); | |
| 2811 if (cl->doHeapRegion(r)) { | |
| 2812 cl->incomplete(); | |
| 2813 return; | |
| 2814 } | |
| 2815 r = next; | |
| 2816 } | |
| 2817 } | |
| 2818 | |
| 2819 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2820 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2821 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2822 // 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
|
2823 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2824 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2825 |
| 342 | 2826 assert(r->in_collection_set(), |
| 2827 "Start region must be a member of the collection set."); | |
| 2828 HeapRegion* cur = r; | |
| 2829 while (cur != NULL) { | |
| 2830 HeapRegion* next = cur->next_in_collection_set(); | |
| 2831 if (cl->doHeapRegion(cur) && false) { | |
| 2832 cl->incomplete(); | |
| 2833 return; | |
| 2834 } | |
| 2835 cur = next; | |
| 2836 } | |
| 2837 cur = g1_policy()->collection_set(); | |
| 2838 while (cur != r) { | |
| 2839 HeapRegion* next = cur->next_in_collection_set(); | |
| 2840 if (cl->doHeapRegion(cur) && false) { | |
| 2841 cl->incomplete(); | |
| 2842 return; | |
| 2843 } | |
| 2844 cur = next; | |
| 2845 } | |
| 2846 } | |
| 2847 | |
|
20304
a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
tschatzl
parents:
20282
diff
changeset
|
2848 HeapRegion* G1CollectedHeap::next_compaction_region(const HeapRegion* from) const { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2849 HeapRegion* result = _hrm.next_region_in_heap(from); |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2850 while (result != NULL && result->isHumongous()) { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2851 result = _hrm.next_region_in_heap(result); |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2852 } |
|
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2853 return result; |
|
20304
a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
tschatzl
parents:
20282
diff
changeset
|
2854 } |
| 342 | 2855 |
| 2856 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
2857 return heap_region_containing(addr); |
| 342 | 2858 } |
| 2859 | |
| 2860 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2861 Space* sp = space_containing(addr); | |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
2862 return sp->block_start(addr); |
| 342 | 2863 } |
| 2864 | |
| 2865 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 2866 Space* sp = space_containing(addr); | |
| 2867 return sp->block_size(addr); | |
| 2868 } | |
| 2869 | |
| 2870 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 2871 Space* sp = space_containing(addr); | |
| 2872 return sp->block_is_obj(addr); | |
| 2873 } | |
| 2874 | |
| 2875 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 2876 return true; | |
| 2877 } | |
| 2878 | |
| 2879 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 17727 | 2880 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
| 2881 } | |
| 2882 | |
| 2883 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
| 2884 return young_list()->eden_used_bytes(); | |
| 2885 } | |
| 2886 | |
| 2887 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
| 2888 // must be smaller than the humongous object limit. | |
| 2889 size_t G1CollectedHeap::max_tlab_size() const { | |
| 2890 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
| 342 | 2891 } |
| 2892 | |
| 2893 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 2894 // Return the remaining space in the cur alloc region, but not less than | |
| 2895 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2896 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2897 // Also, this value can be at most the humongous object threshold, |
| 10405 | 2898 // 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
|
2899 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2900 |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2901 HeapRegion* hr = _allocator->mutator_alloc_region(AllocationContext::current())->get(); |
| 17727 | 2902 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
|
2903 if (hr == NULL) { |
| 17727 | 2904 return max_tlab; |
| 342 | 2905 } else { |
| 17727 | 2906 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
| 342 | 2907 } |
| 2908 } | |
| 2909 | |
| 2910 size_t G1CollectedHeap::max_capacity() const { | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2911 return _hrm.reserved().byte_size(); |
| 342 | 2912 } |
| 2913 | |
| 2914 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 2915 // assert(false, "NYI"); | |
| 2916 return 0; | |
| 2917 } | |
| 2918 | |
| 2919 void G1CollectedHeap::prepare_for_verify() { | |
| 2920 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 2921 ensure_parsability(false); | |
| 2922 } | |
| 2923 g1_rem_set()->prepare_for_verify(); | |
| 2924 } | |
| 2925 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2926 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2927 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2928 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2929 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2930 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2931 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2932 return hr->obj_allocated_since_next_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2933 case VerifyOption_G1UseMarkWord: |
|
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2934 return false; |
|
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|
2935 default: |
|
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|
2936 ShouldNotReachHere(); |
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|
2937 } |
|
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|
2938 return false; // keep some compilers happy |
|
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|
2939 } |
|
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|
2940 |
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2941 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
|
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2942 switch (vo) { |
|
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2943 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
|
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2944 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
|
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2945 case VerifyOption_G1UseMarkWord: return NULL; |
|
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2946 default: ShouldNotReachHere(); |
|
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|
2947 } |
|
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|
2948 return NULL; // keep some compilers happy |
|
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|
2949 } |
|
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2950 |
|
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2951 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
|
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2952 switch (vo) { |
|
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2953 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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2954 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
|
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2955 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
|
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2956 default: ShouldNotReachHere(); |
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2957 } |
|
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2958 return false; // keep some compilers happy |
|
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|
2959 } |
|
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2960 |
|
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2961 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
|
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2962 switch (vo) { |
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2963 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
|
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2964 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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2965 case VerifyOption_G1UseMarkWord: return "NONE"; |
|
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2966 default: ShouldNotReachHere(); |
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|
2967 } |
|
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2968 return NULL; // keep some compilers happy |
|
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|
2969 } |
|
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|
2970 |
|
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|
2971 class VerifyRootsClosure: public OopClosure { |
| 12080 | 2972 private: |
| 2973 G1CollectedHeap* _g1h; | |
| 2974 VerifyOption _vo; | |
| 2975 bool _failures; | |
| 2976 public: | |
| 2977 // _vo == UsePrevMarking -> use "prev" marking information, | |
| 2978 // _vo == UseNextMarking -> use "next" marking information, | |
| 2979 // _vo == UseMarkWord -> use mark word from object header. | |
| 2980 VerifyRootsClosure(VerifyOption vo) : | |
| 2981 _g1h(G1CollectedHeap::heap()), | |
| 2982 _vo(vo), | |
| 2983 _failures(false) { } | |
| 2984 | |
| 2985 bool failures() { return _failures; } | |
| 2986 | |
| 2987 template <class T> void do_oop_nv(T* p) { | |
| 2988 T heap_oop = oopDesc::load_heap_oop(p); | |
| 2989 if (!oopDesc::is_null(heap_oop)) { | |
| 2990 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 2991 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
| 2992 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
| 2993 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
| 2994 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 2995 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
| 2996 } | |
| 2997 obj->print_on(gclog_or_tty); | |
| 2998 _failures = true; | |
| 2999 } | |
| 3000 } | |
| 3001 } | |
| 3002 | |
| 3003 void do_oop(oop* p) { do_oop_nv(p); } | |
| 3004 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 3005 }; | |
| 3006 | |
|
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|
3007 class G1VerifyCodeRootOopClosure: public OopClosure { |
| 12080 | 3008 G1CollectedHeap* _g1h; |
| 3009 OopClosure* _root_cl; | |
| 3010 nmethod* _nm; | |
| 3011 VerifyOption _vo; | |
| 3012 bool _failures; | |
| 3013 | |
| 3014 template <class T> void do_oop_work(T* p) { | |
| 3015 // First verify that this root is live | |
| 3016 _root_cl->do_oop(p); | |
| 3017 | |
| 3018 if (!G1VerifyHeapRegionCodeRoots) { | |
| 3019 // We're not verifying the code roots attached to heap region. | |
| 3020 return; | |
| 3021 } | |
| 3022 | |
| 3023 // Don't check the code roots during marking verification in a full GC | |
| 3024 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3025 return; | |
| 3026 } | |
| 3027 | |
| 3028 // Now verify that the current nmethod (which contains p) is | |
| 3029 // in the code root list of the heap region containing the | |
| 3030 // object referenced by p. | |
| 3031 | |
| 3032 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3033 if (!oopDesc::is_null(heap_oop)) { | |
| 3034 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3035 | |
| 3036 // Now fetch the region containing the object | |
| 3037 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
| 3038 HeapRegionRemSet* hrrs = hr->rem_set(); | |
| 3039 // Verify that the strong code root list for this region | |
| 3040 // contains the nmethod | |
| 3041 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
| 3042 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
| 3043 "from nmethod "PTR_FORMAT" not in strong " | |
| 3044 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
| 3045 p, _nm, hr->bottom(), hr->end()); | |
| 3046 _failures = true; | |
| 3047 } | |
| 3048 } | |
| 3049 } | |
| 3050 | |
| 3051 public: | |
| 3052 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
| 3053 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
| 3054 | |
| 3055 void do_oop(oop* p) { do_oop_work(p); } | |
| 3056 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 3057 | |
| 3058 void set_nmethod(nmethod* nm) { _nm = nm; } | |
| 3059 bool failures() { return _failures; } | |
| 3060 }; | |
| 3061 | |
| 3062 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
| 3063 G1VerifyCodeRootOopClosure* _oop_cl; | |
| 3064 | |
| 3065 public: | |
| 3066 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
| 3067 _oop_cl(oop_cl) {} | |
| 3068 | |
| 3069 void do_code_blob(CodeBlob* cb) { | |
| 3070 nmethod* nm = cb->as_nmethod_or_null(); | |
| 3071 if (nm != NULL) { | |
| 3072 _oop_cl->set_nmethod(nm); | |
| 3073 nm->oops_do(_oop_cl); | |
| 3074 } | |
| 3075 } | |
| 3076 }; | |
| 3077 | |
| 3078 class YoungRefCounterClosure : public OopClosure { | |
| 3079 G1CollectedHeap* _g1h; | |
| 3080 int _count; | |
| 3081 public: | |
| 3082 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
| 3083 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
| 3084 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 3085 | |
| 3086 int count() { return _count; } | |
| 3087 void reset_count() { _count = 0; }; | |
| 3088 }; | |
| 3089 | |
| 3090 class VerifyKlassClosure: public KlassClosure { | |
| 3091 YoungRefCounterClosure _young_ref_counter_closure; | |
| 3092 OopClosure *_oop_closure; | |
| 3093 public: | |
| 3094 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
| 3095 void do_klass(Klass* k) { | |
| 3096 k->oops_do(_oop_closure); | |
| 3097 | |
| 3098 _young_ref_counter_closure.reset_count(); | |
| 3099 k->oops_do(&_young_ref_counter_closure); | |
| 3100 if (_young_ref_counter_closure.count() > 0) { | |
| 3101 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
| 3102 } | |
| 3103 } | |
| 3104 }; | |
| 3105 | |
| 342 | 3106 class VerifyLivenessOopClosure: public OopClosure { |
|
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|
3107 G1CollectedHeap* _g1h; |
|
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|
3108 VerifyOption _vo; |
| 342 | 3109 public: |
|
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|
3110 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
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|
3111 _g1h(g1h), _vo(vo) |
|
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|
3112 { } |
|
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|
3113 void do_oop(narrowOop *p) { do_oop_work(p); } |
|
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|
3114 void do_oop( oop *p) { do_oop_work(p); } |
|
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|
3115 |
|
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|
3116 template <class T> void do_oop_work(T *p) { |
|
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|
3117 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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|
3118 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
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|
3119 "Dead object referenced by a not dead object"); |
| 342 | 3120 } |
| 3121 }; | |
| 3122 | |
| 3123 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3124 private: |
| 342 | 3125 G1CollectedHeap* _g1h; |
| 3126 size_t _live_bytes; | |
| 3127 HeapRegion *_hr; | |
|
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|
3128 VerifyOption _vo; |
| 342 | 3129 public: |
|
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|
3130 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3131 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3132 // _vo == UseMarkWord -> use mark word from object header. |
|
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|
3133 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
|
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|
3134 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3135 _g1h = G1CollectedHeap::heap(); |
| 3136 } | |
| 3137 void do_object(oop o) { | |
|
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|
3138 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3139 assert(o != NULL, "Huh?"); |
|
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|
3140 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
|
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|
3141 // If the object is alive according to the mark word, |
|
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|
3142 // then verify that the marking information agrees. |
|
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|
3143 // Note we can't verify the contra-positive of the |
|
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|
3144 // above: if the object is dead (according to the mark |
|
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|
3145 // word), it may not be marked, or may have been marked |
|
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|
3146 // but has since became dead, or may have been allocated |
|
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|
3147 // since the last marking. |
|
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|
3148 if (_vo == VerifyOption_G1UseMarkWord) { |
|
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|
3149 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
|
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|
3150 } |
|
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|
3151 |
|
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6629
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changeset
|
3152 o->oop_iterate_no_header(&isLive); |
|
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|
3153 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
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|
3154 size_t obj_size = o->size(); // Make sure we don't overflow |
|
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|
3155 _live_bytes += (obj_size * HeapWordSize); |
|
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|
3156 } |
| 342 | 3157 } |
| 3158 } | |
| 3159 size_t live_bytes() { return _live_bytes; } | |
| 3160 }; | |
| 3161 | |
| 3162 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3163 HeapRegion *_hr; | |
| 3164 G1CollectedHeap *_g1; | |
| 3165 public: | |
| 3166 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3167 _g1 = G1CollectedHeap::heap(); | |
| 3168 }; | |
| 3169 | |
| 3170 void do_object(oop o) { | |
| 3171 if (o != NULL) { | |
| 3172 HeapWord *start = (HeapWord *) o; | |
| 3173 size_t word_sz = o->size(); | |
| 3174 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3175 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3176 (void*) o, word_sz, | |
| 3177 _g1->isMarkedPrev(o), | |
| 3178 _g1->isMarkedNext(o), | |
| 3179 _hr->obj_allocated_since_prev_marking(o)); | |
| 3180 HeapWord *end = start + word_sz; | |
| 3181 HeapWord *cur; | |
| 3182 int *val; | |
| 3183 for (cur = start; cur < end; cur++) { | |
| 3184 val = (int *) cur; | |
| 3185 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3186 } | |
| 3187 } | |
| 3188 } | |
| 3189 }; | |
| 3190 | |
| 3191 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3192 private: |
|
6254
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
3193 bool _par; |
|
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|
3194 VerifyOption _vo; |
|
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|
3195 bool _failures; |
| 811 | 3196 public: |
|
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|
3197 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3198 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3199 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3200 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3201 : _par(par), | |
|
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|
3202 _vo(vo), |
|
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|
3203 _failures(false) {} |
|
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|
3204 |
|
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|
3205 bool failures() { |
|
ff2402f6a50b
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|
3206 return _failures; |
|
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|
3207 } |
|
845
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|
3208 |
| 342 | 3209 bool doHeapRegion(HeapRegion* r) { |
|
637
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|
3210 if (!r->continuesHumongous()) { |
|
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|
3211 bool failures = false; |
| 6008 | 3212 r->verify(_vo, &failures); |
|
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|
3213 if (failures) { |
|
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|
3214 _failures = true; |
|
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|
3215 } else { |
|
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|
3216 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
1020
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|
3217 r->object_iterate(¬_dead_yet_cl); |
|
4787
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|
3218 if (_vo != VerifyOption_G1UseNextMarking) { |
|
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|
3219 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
2ace1c4ee8da
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|
3220 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
2ace1c4ee8da
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|
3221 "max_live_bytes "SIZE_FORMAT" " |
|
2ace1c4ee8da
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changeset
|
3222 "< calculated "SIZE_FORMAT, |
|
2ace1c4ee8da
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|
3223 r->bottom(), r->end(), |
|
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|
3224 r->max_live_bytes(), |
|
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|
3225 not_dead_yet_cl.live_bytes()); |
|
4787
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diff
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|
3226 _failures = true; |
|
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diff
changeset
|
3227 } |
|
2ace1c4ee8da
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diff
changeset
|
3228 } else { |
|
2ace1c4ee8da
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diff
changeset
|
3229 // When vo == UseNextMarking we cannot currently do a sanity |
|
2ace1c4ee8da
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diff
changeset
|
3230 // check on the live bytes as the calculation has not been |
|
2ace1c4ee8da
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diff
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|
3231 // finalized yet. |
|
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|
3232 } |
|
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|
3233 } |
| 342 | 3234 } |
|
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|
3235 return false; // stop the region iteration if we hit a failure |
| 342 | 3236 } |
| 3237 }; | |
| 3238 | |
| 12080 | 3239 // This is the task used for parallel verification of the heap regions |
| 390 | 3240 |
| 3241 class G1ParVerifyTask: public AbstractGangTask { | |
| 3242 private: | |
| 3243 G1CollectedHeap* _g1h; | |
|
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|
3244 VerifyOption _vo; |
|
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|
3245 bool _failures; |
| 390 | 3246 |
| 3247 public: | |
|
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|
3248 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
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|
3249 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3250 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3251 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3252 AbstractGangTask("Parallel verify task"), |
|
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|
3253 _g1h(g1h), |
|
3772
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|
3254 _vo(vo), |
|
1020
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|
3255 _failures(false) { } |
|
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|
3256 |
|
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|
3257 bool failures() { |
|
ff2402f6a50b
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|
3258 return _failures; |
|
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|
3259 } |
| 390 | 3260 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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diff
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|
3261 void work(uint worker_id) { |
|
637
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diff
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|
3262 HandleMark hm; |
| 6008 | 3263 VerifyRegionClosure blk(true, _vo); |
|
4728
441e946dc1af
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jmasa
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4711
diff
changeset
|
3264 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
4095
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|
3265 _g1h->workers()->active_workers(), |
| 390 | 3266 HeapRegion::ParVerifyClaimValue); |
|
1020
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|
3267 if (blk.failures()) { |
|
ff2402f6a50b
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diff
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|
3268 _failures = true; |
|
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diff
changeset
|
3269 } |
| 390 | 3270 } |
| 3271 }; | |
| 3272 | |
| 12080 | 3273 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3274 if (SafepointSynchronize::is_at_safepoint()) { |
| 12080 | 3275 assert(Thread::current()->is_VM_thread(), |
| 3276 "Expected to be executed serially by the VM thread at this point"); | |
| 3277 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3278 if (!silent) { gclog_or_tty->print("Roots "); } |
|
3772
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|
3279 VerifyRootsClosure rootsCl(vo); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3280 VerifyKlassClosure klassCl(this, &rootsCl); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3281 CLDToKlassAndOopClosure cldCl(&klassCl, &rootsCl, false); |
|
3772
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diff
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|
3282 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
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3289
diff
changeset
|
3283 // We apply the relevant closures to all the oops in the |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3284 // system dictionary, class loader data graph, the string table |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3285 // and the nmethods in the code cache. |
|
20257
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3286 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
|
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3287 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3288 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3289 process_all_roots(true, // activate StrongRootsScope |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3290 SO_AllCodeCache, // roots scanning options |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3291 &rootsCl, |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
3292 &cldCl, |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
3293 &blobsCl); |
|
20257
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
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20256
diff
changeset
|
3294 |
| 12080 | 3295 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
|
3772
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|
3296 |
|
6747fd0512e0
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3766
diff
changeset
|
3297 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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3766
diff
changeset
|
3298 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
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3766
diff
changeset
|
3299 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
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3766
diff
changeset
|
3300 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
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3766
diff
changeset
|
3301 // the region sets when not in a full GC. |
|
6747fd0512e0
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3766
diff
changeset
|
3302 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
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3766
diff
changeset
|
3303 verify_region_sets(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
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3766
diff
changeset
|
3304 } |
|
6747fd0512e0
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3766
diff
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|
3305 |
| 2152 | 3306 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3307 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3308 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3309 "sanity check"); | |
| 3310 | |
| 6008 | 3311 G1ParVerifyTask task(this, vo); |
|
4095
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4090
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|
3312 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
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4090
diff
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|
3313 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
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|
3314 "If not dynamic should be using all the workers"); |
|
bca17e38de00
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4090
diff
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|
3315 int n_workers = workers()->active_workers(); |
| 390 | 3316 set_par_threads(n_workers); |
| 3317 workers()->run_task(&task); | |
| 3318 set_par_threads(0); | |
|
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|
3319 if (task.failures()) { |
|
ff2402f6a50b
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1019
diff
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|
3320 failures = true; |
|
ff2402f6a50b
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diff
changeset
|
3321 } |
| 390 | 3322 |
|
4095
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4090
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changeset
|
3323 // Checks that the expected amount of parallel work was done. |
|
bca17e38de00
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4090
diff
changeset
|
3324 // The implication is that n_workers is > 0. |
| 390 | 3325 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3326 "sanity check"); | |
| 3327 | |
| 3328 reset_heap_region_claim_values(); | |
| 3329 | |
| 3330 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3331 "sanity check"); | |
| 3332 } else { | |
| 6008 | 3333 VerifyRegionClosure blk(false, vo); |
| 3766 | 3334 heap_region_iterate(&blk); |
|
1020
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|
3335 if (blk.failures()) { |
|
ff2402f6a50b
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1019
diff
changeset
|
3336 failures = true; |
|
ff2402f6a50b
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1019
diff
changeset
|
3337 } |
| 390 | 3338 } |
| 2152 | 3339 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3340 rem_set()->verify(); |
|
1020
ff2402f6a50b
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diff
changeset
|
3341 |
| 17764 | 3342 if (G1StringDedup::is_enabled()) { |
| 3343 if (!silent) gclog_or_tty->print("StrDedup "); | |
| 3344 G1StringDedup::verify(); | |
| 3345 } | |
| 3346 | |
|
1020
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changeset
|
3347 if (failures) { |
|
ff2402f6a50b
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diff
changeset
|
3348 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
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4072
diff
changeset
|
3349 // It helps to have the per-region information in the output to |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3350 // 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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4072
diff
changeset
|
3351 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3352 print_extended_on(gclog_or_tty); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3353 gclog_or_tty->cr(); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3354 #ifndef PRODUCT |
| 1044 | 3355 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3356 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3357 vo, false /* all */); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3358 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3359 #endif |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3360 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3361 } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3362 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3363 } else { |
| 17764 | 3364 if (!silent) { |
| 3365 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
| 3366 if (G1StringDedup::is_enabled()) { | |
| 3367 gclog_or_tty->print(", StrDedup"); | |
| 3368 } | |
| 3369 gclog_or_tty->print(") "); | |
| 3370 } | |
| 342 | 3371 } |
| 3372 } | |
| 3373 | |
| 12080 | 3374 void G1CollectedHeap::verify(bool silent) { |
| 3375 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3376 } | |
| 3377 | |
| 3378 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
| 3379 double verify_time_ms = 0.0; | |
| 3380 | |
| 3381 if (guard && total_collections() >= VerifyGCStartAt) { | |
| 3382 double verify_start = os::elapsedTime(); | |
| 3383 HandleMark hm; // Discard invalid handles created during verification | |
| 3384 prepare_for_verify(); | |
| 3385 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
| 3386 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
| 3387 } | |
| 3388 | |
| 3389 return verify_time_ms; | |
| 3390 } | |
| 3391 | |
| 3392 void G1CollectedHeap::verify_before_gc() { | |
| 3393 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
| 3394 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
| 3395 } | |
| 3396 | |
| 3397 void G1CollectedHeap::verify_after_gc() { | |
| 3398 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
| 3399 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
| 3400 } | |
| 3401 | |
| 342 | 3402 class PrintRegionClosure: public HeapRegionClosure { |
| 3403 outputStream* _st; | |
| 3404 public: | |
| 3405 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3406 bool doHeapRegion(HeapRegion* r) { | |
| 3407 r->print_on(_st); | |
| 3408 return false; | |
| 3409 } | |
| 3410 }; | |
| 3411 | |
|
17833
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3412 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
|
3413 const HeapRegion* hr, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3414 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3415 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3416 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3417 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3418 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3419 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3420 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3421 return false; // keep some compilers happy |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3422 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3423 |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3424 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3425 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3426 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3427 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3428 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3429 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3430 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3431 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3432 return false; // keep some compilers happy |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3433 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3434 |
| 342 | 3435 void G1CollectedHeap::print_on(outputStream* st) const { |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3436 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3437 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
|
3438 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3439 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3440 _hrm.reserved().start(), |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3441 _hrm.reserved().start() + _hrm.length() + HeapRegion::GrainWords, |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3442 _hrm.reserved().end()); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3443 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3444 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
|
3445 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3446 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
|
3447 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3448 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
|
3449 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
|
3450 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3451 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3452 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3453 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3454 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3455 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3456 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3457 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3458 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3459 st->cr(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3460 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
|
3461 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3462 "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
|
3463 "PTAMS=previous top-at-mark-start, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3464 "NTAMS=next top-at-mark-start)"); |
| 342 | 3465 PrintRegionClosure blk(st); |
| 3766 | 3466 heap_region_iterate(&blk); |
| 342 | 3467 } |
| 3468 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3469 void G1CollectedHeap::print_on_error(outputStream* st) const { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3470 this->CollectedHeap::print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3471 |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3472 if (_cm != NULL) { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3473 st->cr(); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3474 _cm->print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3475 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3476 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3477 |
| 342 | 3478 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3479 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3480 workers()->print_worker_threads_on(st); |
| 3481 } | |
| 3482 _cmThread->print_on(st); | |
| 342 | 3483 st->cr(); |
| 1019 | 3484 _cm->print_worker_threads_on(st); |
| 3485 _cg1r->print_worker_threads_on(st); | |
| 17764 | 3486 if (G1StringDedup::is_enabled()) { |
| 3487 G1StringDedup::print_worker_threads_on(st); | |
| 3488 } | |
| 342 | 3489 } |
| 3490 | |
| 3491 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3492 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3493 workers()->threads_do(tc); |
| 3494 } | |
| 3495 tc->do_thread(_cmThread); | |
| 794 | 3496 _cg1r->threads_do(tc); |
| 17764 | 3497 if (G1StringDedup::is_enabled()) { |
| 3498 G1StringDedup::threads_do(tc); | |
| 3499 } | |
| 342 | 3500 } |
| 3501 | |
| 3502 void G1CollectedHeap::print_tracing_info() const { | |
| 3503 // We'll overload this to mean "trace GC pause statistics." | |
| 3504 if (TraceGen0Time || TraceGen1Time) { | |
| 3505 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3506 // to that. | |
| 3507 g1_policy()->print_tracing_info(); | |
| 3508 } | |
| 751 | 3509 if (G1SummarizeRSetStats) { |
| 342 | 3510 g1_rem_set()->print_summary_info(); |
| 3511 } | |
| 1282 | 3512 if (G1SummarizeConcMark) { |
| 342 | 3513 concurrent_mark()->print_summary_info(); |
| 3514 } | |
| 3515 g1_policy()->print_yg_surv_rate_info(); | |
| 3516 SpecializationStats::print(); | |
| 3517 } | |
| 3518 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3519 #ifndef PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3520 // Helpful for debugging RSet issues. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3521 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3522 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3523 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3524 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3525 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3526 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3527 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3528 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3529 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3530 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3531 _occupied_sum += occupied; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3532 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3533 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
|
3534 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3535 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3536 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3537 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3538 hrrs->print(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3539 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3540 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3541 return false; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3542 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3543 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3544 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3545 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3546 gclog_or_tty->print_cr("========================================"); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3547 gclog_or_tty->print_cr("%s", msg); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3548 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3549 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3550 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3551 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3552 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
|
3553 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3554 gclog_or_tty->cr(); |
|
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3555 } |
|
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parents:
3774
diff
changeset
|
3556 }; |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3557 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3558 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3559 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3560 collection_set_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3561 } |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3562 |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3563 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3564 PrintRSetsClosure cl("Printing All RSets");; |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3565 heap_region_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3566 } |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3567 #endif // PRODUCT |
|
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tonyp
parents:
3774
diff
changeset
|
3568 |
| 342 | 3569 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3570 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3571 "not a garbage-first heap"); | |
| 3572 return _g1h; | |
| 3573 } | |
| 3574 | |
| 3575 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
|
3576 // always_do_update_barrier = false; |
| 342 | 3577 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3578 // Fill TLAB's and such | |
| 17727 | 3579 accumulate_statistics_all_tlabs(); |
| 342 | 3580 ensure_parsability(true); |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3581 |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3582 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3583 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3584 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
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12305
diff
changeset
|
3585 } |
| 342 | 3586 } |
| 3587 | |
|
20445
e5668dcf12e9
8057818: collect allocation context statistics at gc pauses
jcoomes
parents:
20404
diff
changeset
|
3588 void G1CollectedHeap::gc_epilogue(bool full) { |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3589 |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3590 if (G1SummarizeRSetStats && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3591 (G1SummarizeRSetStatsPeriod > 0) && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3592 // 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
|
3593 ((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
|
3594 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
|
3595 } |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3596 |
| 342 | 3597 // FIXME: what is this about? |
| 3598 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3599 // is set. | |
| 3600 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3601 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3602 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3603 |
| 17727 | 3604 resize_all_tlabs(); |
|
20445
e5668dcf12e9
8057818: collect allocation context statistics at gc pauses
jcoomes
parents:
20404
diff
changeset
|
3605 allocation_context_stats().update(full); |
| 17727 | 3606 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3607 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3608 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3609 Universe::update_heap_info_at_gc(); |
| 342 | 3610 } |
| 3611 | |
| 1973 | 3612 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3613 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
|
3614 bool* succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3615 GCCause::Cause gc_cause) { |
| 1973 | 3616 assert_heap_not_locked_and_not_at_safepoint(); |
| 342 | 3617 g1_policy()->record_stop_world_start(); |
| 1973 | 3618 VM_G1IncCollectionPause op(gc_count_before, |
| 3619 word_size, | |
| 3620 false, /* should_initiate_conc_mark */ | |
| 3621 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
|
3622 gc_cause); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3623 |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3624 op.set_allocation_context(AllocationContext::current()); |
| 1973 | 3625 VMThread::execute(&op); |
| 3626 | |
| 3627 HeapWord* result = op.result(); | |
| 3628 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3629 assert(result == NULL || ret_succeeded, | |
| 3630 "the result should be NULL if the VM did not succeed"); | |
| 3631 *succeeded = ret_succeeded; | |
| 3632 | |
| 3633 assert_heap_not_locked(); | |
| 3634 return result; | |
| 342 | 3635 } |
| 3636 | |
| 3637 void | |
| 3638 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3639 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
|
3640 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3641 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3642 CGC_lock->notify(); |
| 342 | 3643 } |
| 3644 } | |
| 3645 | |
| 3646 size_t G1CollectedHeap::pending_card_num() { | |
| 3647 size_t extra_cards = 0; | |
| 3648 JavaThread *curr = Threads::first(); | |
| 3649 while (curr != NULL) { | |
| 3650 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3651 extra_cards += dcq.size(); | |
| 3652 curr = curr->next(); | |
| 3653 } | |
| 3654 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3655 size_t buffer_size = dcqs.buffer_size(); | |
| 3656 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3657 |
| 3658 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3659 // in bytes - not the number of 'entries'. We need to convert | |
| 3660 // into a number of cards. | |
| 3661 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3662 } |
| 3663 | |
| 3664 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3665 return g1_rem_set()->cardsScanned(); |
| 342 | 3666 } |
| 3667 | |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3668 bool G1CollectedHeap::humongous_region_is_always_live(uint index) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3669 HeapRegion* region = region_at(index); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3670 assert(region->startsHumongous(), "Must start a humongous object"); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3671 return oop(region->bottom())->is_objArray() || !region->rem_set()->is_empty(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3672 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3673 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3674 class RegisterHumongousWithInCSetFastTestClosure : public HeapRegionClosure { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3675 private: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3676 size_t _total_humongous; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3677 size_t _candidate_humongous; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3678 public: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3679 RegisterHumongousWithInCSetFastTestClosure() : _total_humongous(0), _candidate_humongous(0) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3680 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3681 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3682 virtual bool doHeapRegion(HeapRegion* r) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3683 if (!r->startsHumongous()) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3684 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3685 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3686 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3687 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3688 uint region_idx = r->hrm_index(); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3689 bool is_candidate = !g1h->humongous_region_is_always_live(region_idx); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3690 // Is_candidate already filters out humongous regions with some remembered set. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3691 // This will not lead to humongous object that we mistakenly keep alive because |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3692 // during young collection the remembered sets will only be added to. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3693 if (is_candidate) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3694 g1h->register_humongous_region_with_in_cset_fast_test(region_idx); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3695 _candidate_humongous++; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3696 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3697 _total_humongous++; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3698 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3699 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3700 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3701 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3702 size_t total_humongous() const { return _total_humongous; } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3703 size_t candidate_humongous() const { return _candidate_humongous; } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3704 }; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3705 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3706 void G1CollectedHeap::register_humongous_regions_with_in_cset_fast_test() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3707 if (!G1ReclaimDeadHumongousObjectsAtYoungGC) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3708 g1_policy()->phase_times()->record_fast_reclaim_humongous_stats(0, 0); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3709 return; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3710 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3711 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3712 RegisterHumongousWithInCSetFastTestClosure cl; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3713 heap_region_iterate(&cl); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3714 g1_policy()->phase_times()->record_fast_reclaim_humongous_stats(cl.total_humongous(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3715 cl.candidate_humongous()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3716 _has_humongous_reclaim_candidates = cl.candidate_humongous() > 0; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3717 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3718 if (_has_humongous_reclaim_candidates) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3719 clear_humongous_is_live_table(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3720 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3721 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3722 |
| 342 | 3723 void |
| 3724 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3725 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3726 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3727 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3728 if (_surviving_young_words == NULL) { |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3729 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
| 342 | 3730 "Not enough space for young surv words summary."); |
| 3731 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3732 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
|
3733 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3734 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
|
3735 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3736 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3737 #endif // !ASSERT |
| 342 | 3738 } |
| 3739 | |
| 3740 void | |
| 3741 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3742 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
|
3743 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
|
3744 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3745 _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
|
3746 } |
| 342 | 3747 } |
| 3748 | |
| 3749 void | |
| 3750 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3751 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3752 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3753 _surviving_young_words = NULL; |
| 3754 } | |
| 3755 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3756 #ifdef ASSERT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3757 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3758 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3759 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3760 // 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
|
3761 // 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
|
3762 // 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
|
3763 // 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
|
3764 // 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
|
3765 // 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
|
3766 // 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
|
3767 // 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
|
3768 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3769 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
|
3770 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3771 // 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
|
3772 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3773 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3774 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3775 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3776 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3777 |
| 1709 | 3778 #if TASKQUEUE_STATS |
| 3779 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3780 st->print_raw_cr("GC Task Stats"); | |
| 3781 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3782 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3783 } | |
| 3784 | |
| 3785 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3786 print_taskqueue_stats_hdr(st); | |
| 3787 | |
| 3788 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3789 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3790 for (int i = 0; i < n; ++i) { |
| 3791 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3792 totals += task_queue(i)->stats; | |
| 3793 } | |
| 3794 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3795 | |
| 3796 DEBUG_ONLY(totals.verify()); | |
| 3797 } | |
| 3798 | |
| 3799 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3800 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3801 for (int i = 0; i < n; ++i) { |
| 3802 task_queue(i)->stats.reset(); | |
| 3803 } | |
| 3804 } | |
| 3805 #endif // TASKQUEUE_STATS | |
| 3806 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3807 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3808 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3809 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3810 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3811 |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3812 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
|
3813 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3814 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
|
3815 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3816 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3817 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3818 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3819 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3820 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3821 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3822 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3823 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3824 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3825 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3826 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3827 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3828 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3829 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3830 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
|
3831 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3832 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3833 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3834 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3835 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3836 gclog_or_tty->print("--"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3837 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3838 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3839 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
|
3840 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3841 gclog_or_tty->flush(); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3842 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3843 |
| 1973 | 3844 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3845 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3846 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3847 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3848 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3849 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3850 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3851 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3852 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3853 _gc_timer_stw->register_gc_start(); |
| 10405 | 3854 |
| 3855 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
| 3856 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3857 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3858 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3859 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3860 print_heap_before_gc(); |
| 10405 | 3861 trace_heap_before_gc(_gc_tracer_stw); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3862 |
| 2152 | 3863 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3864 verify_dirty_young_regions(); |
| 2152 | 3865 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3866 // 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
|
3867 // 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
|
3868 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3869 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3870 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3871 // 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
|
3872 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3873 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3874 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3875 // 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
|
3876 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
|
3877 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3878 // 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
|
3879 // 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
|
3880 // 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
|
3881 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
|
3882 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3883 // 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
|
3884 { |
| 10405 | 3885 EvacuationInfo evacuation_info; |
| 3886 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3887 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3888 // 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
|
3889 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3890 increment_old_marking_cycles_started(); |
| 10405 | 3891 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
|
3892 } |
| 10405 | 3893 |
| 3894 _gc_tracer_stw->report_yc_type(yc_type()); | |
| 3895 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3896 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3897 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3898 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
|
3899 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
|
3900 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
|
3901 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3902 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3903 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3904 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3905 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3906 |
| 2361 | 3907 // If the secondary_free_list is not empty, append it to the |
| 3908 // free_list. No need to wait for the cleanup operation to finish; | |
| 3909 // the region allocation code will check the secondary_free_list | |
| 3910 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3911 // set, skip this step so that the region allocation code has to | |
| 3912 // get entries from the secondary_free_list. | |
| 2152 | 3913 if (!G1StressConcRegionFreeing) { |
| 2361 | 3914 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3915 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3916 |
| 12080 | 3917 assert(check_young_list_well_formed(), "young list should be well formed"); |
| 3918 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3919 "sanity check"); | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3920 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3921 // 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
|
3922 // 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
|
3923 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3924 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3925 { // 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
|
3926 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3927 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3928 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3929 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
|
3930 increment_gc_time_stamp(); |
| 342 | 3931 |
|
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
|
3932 verify_before_gc(); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
3933 check_bitmaps("GC Start"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3934 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3935 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3936 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3937 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3938 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3939 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3940 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3941 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3942 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3943 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3944 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3945 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3946 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3947 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3948 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3949 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3950 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3951 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3952 // 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
|
3953 // of the collection set!). |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3954 _allocator->release_mutator_alloc_region(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3955 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3956 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3957 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3958 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3959 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3960 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3961 // 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
|
3962 // 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
|
3963 // 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
|
3964 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3965 // 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
|
3966 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3967 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3968 // 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
|
3969 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3970 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3971 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3972 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3973 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3974 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
|
3975 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3976 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
3977 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
|
3978 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3979 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3980 // 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
|
3981 // 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
|
3982 // 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
|
3983 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3984 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
|
3985 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3986 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3987 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
|
3988 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
|
3989 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3990 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
|
3991 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3992 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3993 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3994 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3995 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3996 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3998 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3999 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4000 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4001 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4002 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4003 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4004 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
|
4005 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4006 |
| 10405 | 4007 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4008 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4009 register_humongous_regions_with_in_cset_fast_test(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4010 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4011 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4012 // 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
|
4013 // 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
|
4014 // 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
|
4015 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4016 _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
|
4017 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4018 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4019 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4020 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4021 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4026 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4027 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4028 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4029 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4030 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4032 #endif // ASSERT |
| 1707 | 4033 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4034 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4035 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4036 // Initialize the GC alloc regions. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4037 _allocator->init_gc_alloc_regions(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4038 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4039 // Actually do the work... |
| 10405 | 4040 evacuate_collection_set(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4042 // 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
|
4043 // (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
|
4044 // 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
|
4045 // 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
|
4046 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4047 _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
|
4048 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4049 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4050 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4051 |
| 10405 | 4052 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4053 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4054 eagerly_reclaim_humongous_regions(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4055 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4056 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4057 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4058 cleanup_surviving_young_words(); |
|
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 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4061 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4062 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4063 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4065 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4066 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4067 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4068 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4069 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4070 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4071 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4072 "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
|
4073 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4074 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4075 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4076 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4077 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4078 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
| 10405 | 4080 _young_list->first_survivor_region(), |
| 4081 _young_list->last_survivor_region()); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4082 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 if (evacuation_failed()) { |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4086 _allocator->set_used(recalculate_used()); |
| 10405 | 4087 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
| 4088 for (uint i = 0; i < n_queues; i++) { | |
| 4089 if (_evacuation_failed_info_array[i].has_failed()) { | |
| 4090 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
| 4091 } | |
| 4092 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4093 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4094 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4095 // when they were freed. Add in the bytes evacuated. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4096 _allocator->increase_used(g1_policy()->bytes_copied_during_gc()); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4097 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4098 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4099 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4100 // 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
|
4101 // 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
|
4102 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4103 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4104 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4105 // 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
|
4106 // 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
|
4107 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4108 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4109 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4110 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4111 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4112 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4113 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4114 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4115 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
|
4116 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4117 |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4118 _allocator->init_mutator_alloc_region(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4119 |
|
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 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 size_t bytes_before = capacity(); |
| 4785 | 4124 // No need for an ergo verbose message here, |
| 4125 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 if (!expand(expand_bytes)) { |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
4127 // We failed to expand the heap. Cannot do anything about it. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4129 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4130 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4131 |
| 10405 | 4132 // 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
|
4133 // 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
|
4134 _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
|
4135 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4136 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4137 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4138 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4139 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4140 // 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
|
4141 // 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
|
4142 // 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
|
4143 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
|
4144 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
| 10405 | 4145 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
|
4146 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4147 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4148 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4149 // 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
|
4150 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4151 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4152 // 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
|
4153 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4155 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4160 // 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
|
4161 // 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
|
4162 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 // 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
|
4164 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4165 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 |
|
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
|
4172 verify_after_gc(); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
4173 check_bitmaps("GC End"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4174 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4177 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4178 // 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
|
4179 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4180 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4181 // 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
|
4182 // 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
|
4183 // 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
|
4184 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4185 _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
|
4186 |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4187 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4188 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4189 #endif |
| 342 | 4190 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4191 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4192 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4193 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4194 // 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
|
4195 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
|
4196 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4197 // 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
|
4198 // 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
|
4199 // 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
|
4200 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4201 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
4202 _hrm.verify_optional(); |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4203 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4204 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4205 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
|
4206 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4207 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4208 print_heap_after_gc(); |
| 10405 | 4209 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
|
4210 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4211 // 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
|
4212 // 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
|
4213 // 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
|
4214 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4215 g1mm()->update_sizes(); |
| 10405 | 4216 |
| 4217 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
| 4218 _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
|
4219 _gc_timer_stw->register_gc_end(); |
| 10405 | 4220 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
| 4221 } | |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4222 // 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
|
4223 // 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
|
4224 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4225 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4226 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4227 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4228 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4229 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4230 // 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
|
4231 // 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
|
4232 // not start until the safepoint itself is released in |
| 20192 | 4233 // SuspendibleThreadSet::desynchronize(). |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4234 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4235 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4236 |
| 1973 | 4237 return true; |
| 342 | 4238 } |
| 4239 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4240 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4241 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4242 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4243 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4244 case GCAllocForSurvived: |
| 6595 | 4245 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4246 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4247 case GCAllocForTenured: |
| 6595 | 4248 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4249 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4250 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4251 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4252 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4253 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4254 } |
| 6595 | 4255 |
| 4256 // Prevent humongous PLAB sizes for two reasons: | |
| 4257 // * PLABs are allocated using a similar paths as oops, but should | |
| 4258 // never be in a humongous region | |
| 4259 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4260 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
|
4261 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4262 |
| 342 | 4263 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { |
| 4264 _drain_in_progress = false; | |
| 4265 set_evac_failure_closure(cl); | |
| 6197 | 4266 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4267 } |
| 4268 | |
| 4269 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4270 assert(_evac_failure_scan_stack != NULL && | |
| 4271 _evac_failure_scan_stack->length() == 0, | |
| 4272 "Postcondition"); | |
| 4273 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4274 delete _evac_failure_scan_stack; |
| 342 | 4275 _evac_failure_scan_stack = NULL; |
| 4276 } | |
| 4277 | |
| 4278 void G1CollectedHeap::remove_self_forwarding_pointers() { | |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4279 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4280 |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4281 double remove_self_forwards_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4282 |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4283 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4284 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4285 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4286 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4287 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4288 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4289 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4290 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4291 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4292 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4293 assert(check_cset_heap_region_claim_values(HeapRegion::ParEvacFailureClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4294 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4295 // 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
|
4296 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4297 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4298 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4299 |
| 4300 // Now restore saved marks, if any. | |
|
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4301 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
|
4302 _preserved_marks_of_objs.size(), "Both or none."); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4303 while (!_objs_with_preserved_marks.is_empty()) { |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4304 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
|
4305 markOop m = _preserved_marks_of_objs.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4306 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
|
4307 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4308 _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
|
4309 _preserved_marks_of_objs.clear(true); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4310 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4311 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
| 342 | 4312 } |
| 4313 | |
| 4314 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4315 _evac_failure_scan_stack->push(obj); | |
| 4316 } | |
| 4317 | |
| 4318 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4319 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4320 | |
| 4321 while (_evac_failure_scan_stack->length() > 0) { | |
| 4322 oop obj = _evac_failure_scan_stack->pop(); | |
| 4323 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4324 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4325 } | |
| 4326 } | |
| 4327 | |
| 4328 oop | |
| 10405 | 4329 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
|
4330 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
|
4331 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
|
4332 err_msg("obj: "PTR_FORMAT" should still be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4333 (HeapWord*) old)); |
| 342 | 4334 markOop m = old->mark(); |
| 4335 oop forward_ptr = old->forward_to_atomic(old); | |
| 4336 if (forward_ptr == NULL) { | |
| 4337 // Forward-to-self succeeded. | |
| 10405 | 4338 assert(_par_scan_state != NULL, "par scan state"); |
| 4339 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
| 4340 uint queue_num = _par_scan_state->queue_num(); | |
| 4341 | |
| 4342 _evacuation_failed = true; | |
| 4343 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
| 342 | 4344 if (_evac_failure_closure != cl) { |
| 4345 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4346 assert(!_drain_in_progress, | |
| 4347 "Should only be true while someone holds the lock."); | |
| 4348 // Set the global evac-failure closure to the current thread's. | |
| 4349 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4350 set_evac_failure_closure(cl); | |
| 4351 // Now do the common part. | |
| 4352 handle_evacuation_failure_common(old, m); | |
| 4353 // Reset to NULL. | |
| 4354 set_evac_failure_closure(NULL); | |
| 4355 } else { | |
| 4356 // The lock is already held, and this is recursive. | |
| 4357 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4358 handle_evacuation_failure_common(old, m); | |
| 4359 } | |
| 4360 return old; | |
| 4361 } 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
|
4362 // 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
|
4363 // 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
|
4364 // 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
|
4365 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
|
4366 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
|
4367 "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
|
4368 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4369 return forward_ptr; |
| 4370 } | |
| 4371 } | |
| 4372 | |
| 4373 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4374 preserve_mark_if_necessary(old, m); | |
| 4375 | |
| 4376 HeapRegion* r = heap_region_containing(old); | |
| 4377 if (!r->evacuation_failed()) { | |
| 4378 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4379 _hr_printer.evac_failure(r); |
| 342 | 4380 } |
| 4381 | |
| 4382 push_on_evac_failure_scan_stack(old); | |
| 4383 | |
| 4384 if (!_drain_in_progress) { | |
| 4385 // prevent recursion in copy_to_survivor_space() | |
| 4386 _drain_in_progress = true; | |
| 4387 drain_evac_failure_scan_stack(); | |
| 4388 _drain_in_progress = false; | |
| 4389 } | |
| 4390 } | |
| 4391 | |
| 4392 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
|
4393 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4394 // 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
|
4395 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4396 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
|
4397 _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
|
4398 _preserved_marks_of_objs.push(m); |
| 342 | 4399 } |
| 4400 } | |
| 4401 | |
| 4402 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4403 size_t word_size, |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4404 AllocationContext_t context) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4405 if (purpose == GCAllocForSurvived) { |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4406 HeapWord* result = survivor_attempt_allocation(word_size, context); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4407 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4408 return result; |
| 342 | 4409 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4410 // 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
|
4411 // object there. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4412 return old_attempt_allocation(word_size, context); |
| 342 | 4413 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4414 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4415 assert(purpose == GCAllocForTenured, "sanity"); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4416 HeapWord* result = old_attempt_allocation(word_size, context); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4417 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4418 return result; |
| 342 | 4419 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4420 // 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
|
4421 // object there. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4422 return survivor_attempt_allocation(word_size, context); |
| 342 | 4423 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4424 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4425 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4426 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4427 // 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
|
4428 return NULL; |
| 342 | 4429 } |
| 4430 | |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4431 void G1ParCopyHelper::mark_object(oop obj) { |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4432 assert(!_g1->heap_region_containing(obj)->in_collection_set(), "should not mark objects in the CSet"); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4433 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4434 // 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
|
4435 _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
|
4436 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4437 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4438 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
|
4439 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
|
4440 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
|
4441 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
|
4442 |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4443 assert(_g1->heap_region_containing(from_obj)->in_collection_set(), "from obj should be in the CSet"); |
|
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4444 assert(!_g1->heap_region_containing(to_obj)->in_collection_set(), "should not mark objects in the CSet"); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4445 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4446 // 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
|
4447 // 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
|
4448 // 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
|
4449 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4450 _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
|
4451 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4452 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4453 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4454 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
|
4455 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
|
4456 _scanned_klass->record_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4457 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4458 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4459 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4460 template <G1Barrier barrier, G1Mark do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4461 template <class T> |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4462 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
|
4463 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
|
4464 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4465 if (oopDesc::is_null(heap_oop)) { |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4466 return; |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4467 } |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4468 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4469 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
|
4470 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4471 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4472 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4473 G1CollectedHeap::in_cset_state_t state = _g1->in_cset_state(obj); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4474 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4475 if (state == G1CollectedHeap::InCSet) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4476 oop forwardee; |
| 526 | 4477 if (obj->is_forwarded()) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4478 forwardee = obj->forwardee(); |
| 526 | 4479 } else { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4480 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
| 342 | 4481 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4482 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
|
4483 oopDesc::encode_store_heap_oop(p, forwardee); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4484 if (do_mark_object != G1MarkNone && forwardee != obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4485 // 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
|
4486 // 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
|
4487 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4488 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4489 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4490 if (barrier == G1BarrierKlass) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4491 do_klass_barrier(p, forwardee); |
| 342 | 4492 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4493 } else { |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4494 if (state == G1CollectedHeap::IsHumongous) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4495 _g1->set_humongous_is_live(obj); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4496 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4497 // The object is not in collection set. If we're a root scanning |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4498 // closure during an initial mark pause then attempt to mark the object. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4499 if (do_mark_object == G1MarkFromRoot) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4500 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4501 } |
| 526 | 4502 } |
| 4503 | |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4504 if (barrier == G1BarrierEvac) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4505 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4506 } |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4507 } |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4508 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4509 template void G1ParCopyClosure<G1BarrierEvac, G1MarkNone>::do_oop_work(oop* p); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4510 template void G1ParCopyClosure<G1BarrierEvac, G1MarkNone>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4511 |
| 342 | 4512 class G1ParEvacuateFollowersClosure : public VoidClosure { |
| 4513 protected: | |
| 4514 G1CollectedHeap* _g1h; | |
| 4515 G1ParScanThreadState* _par_scan_state; | |
| 4516 RefToScanQueueSet* _queues; | |
| 4517 ParallelTaskTerminator* _terminator; | |
| 4518 | |
| 4519 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4520 RefToScanQueueSet* queues() { return _queues; } | |
| 4521 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4522 | |
| 4523 public: | |
| 4524 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4525 G1ParScanThreadState* par_scan_state, | |
| 4526 RefToScanQueueSet* queues, | |
| 4527 ParallelTaskTerminator* terminator) | |
| 4528 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4529 _queues(queues), _terminator(terminator) {} | |
| 4530 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4531 void do_void(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4532 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4533 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4534 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4535 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4536 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4537 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4538 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4539 pss->start_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4540 const bool res = terminator()->offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4541 pss->end_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4542 return res; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4543 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4544 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4545 void G1ParEvacuateFollowersClosure::do_void() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4546 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4547 pss->trim_queue(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4548 do { |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4549 pss->steal_and_trim_queue(queues()); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4550 } while (!offer_termination()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4551 } |
| 342 | 4552 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4553 class G1KlassScanClosure : public KlassClosure { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4554 G1ParCopyHelper* _closure; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4555 bool _process_only_dirty; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4556 int _count; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4557 public: |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4558 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4559 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4560 void do_klass(Klass* klass) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4561 // If the klass has not been dirtied we know that there's |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4562 // no references into the young gen and we can skip it. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4563 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4564 // Clean the klass since we're going to scavenge all the metadata. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4565 klass->clear_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4566 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4567 // Tell the closure that this klass is the Klass to scavenge |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4568 // and is the one to dirty if oops are left pointing into the young gen. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4569 _closure->set_scanned_klass(klass); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4570 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4571 klass->oops_do(_closure); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4572 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4573 _closure->set_scanned_klass(NULL); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4574 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4575 _count++; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4576 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4577 }; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4578 |
| 20494 | 4579 class G1CodeBlobClosure : public CodeBlobClosure { |
| 4580 class HeapRegionGatheringOopClosure : public OopClosure { | |
| 4581 G1CollectedHeap* _g1h; | |
| 4582 OopClosure* _work; | |
| 4583 nmethod* _nm; | |
| 4584 | |
| 4585 template <typename T> | |
| 4586 void do_oop_work(T* p) { | |
| 4587 _work->do_oop(p); | |
| 4588 T oop_or_narrowoop = oopDesc::load_heap_oop(p); | |
| 4589 if (!oopDesc::is_null(oop_or_narrowoop)) { | |
| 4590 oop o = oopDesc::decode_heap_oop_not_null(oop_or_narrowoop); | |
| 4591 HeapRegion* hr = _g1h->heap_region_containing_raw(o); | |
| 4592 assert(!_g1h->obj_in_cs(o) || hr->rem_set()->strong_code_roots_list_contains(_nm), "if o still in CS then evacuation failed and nm must already be in the remset"); | |
| 4593 hr->add_strong_code_root(_nm); | |
| 4594 } | |
| 4595 } | |
| 4596 | |
| 4597 public: | |
| 4598 HeapRegionGatheringOopClosure(OopClosure* oc) : _g1h(G1CollectedHeap::heap()), _work(oc), _nm(NULL) {} | |
| 4599 | |
| 4600 void do_oop(oop* o) { | |
| 4601 do_oop_work(o); | |
| 4602 } | |
| 4603 | |
| 4604 void do_oop(narrowOop* o) { | |
| 4605 do_oop_work(o); | |
| 4606 } | |
| 4607 | |
| 4608 void set_nm(nmethod* nm) { | |
| 4609 _nm = nm; | |
| 4610 } | |
| 4611 }; | |
| 4612 | |
| 4613 HeapRegionGatheringOopClosure _oc; | |
| 4614 public: | |
| 4615 G1CodeBlobClosure(OopClosure* oc) : _oc(oc) {} | |
| 4616 | |
| 4617 void do_code_blob(CodeBlob* cb) { | |
| 4618 nmethod* nm = cb->as_nmethod_or_null(); | |
| 4619 if (nm != NULL) { | |
| 4620 if (!nm->test_set_oops_do_mark()) { | |
| 4621 _oc.set_nm(nm); | |
| 4622 nm->oops_do(&_oc); | |
| 4623 nm->fix_oop_relocations(); | |
| 4624 } | |
| 4625 } | |
| 4626 } | |
| 4627 }; | |
| 4628 | |
| 342 | 4629 class G1ParTask : public AbstractGangTask { |
| 4630 protected: | |
| 4631 G1CollectedHeap* _g1h; | |
| 4632 RefToScanQueueSet *_queues; | |
| 4633 ParallelTaskTerminator _terminator; | |
|
4728
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4634 uint _n_workers; |
| 342 | 4635 |
| 4636 Mutex _stats_lock; | |
| 4637 Mutex* stats_lock() { return &_stats_lock; } | |
| 4638 | |
| 4639 public: | |
|
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4640 G1ParTask(G1CollectedHeap* g1h, RefToScanQueueSet *task_queues) |
| 342 | 4641 : AbstractGangTask("G1 collection"), |
| 4642 _g1h(g1h), | |
| 4643 _queues(task_queues), | |
|
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4644 _terminator(0, _queues), |
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4645 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4646 {} |
| 4647 | |
| 4648 RefToScanQueueSet* queues() { return _queues; } | |
| 4649 | |
| 4650 RefToScanQueue *work_queue(int i) { | |
| 4651 return queues()->queue(i); | |
| 4652 } | |
| 4653 | |
|
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4654 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
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4655 |
|
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|
4656 virtual void set_for_termination(int active_workers) { |
|
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4657 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
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4658 // in the young space (_par_seq_tasks) in the G1 heap |
|
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4659 // for SequentialSubTasksDone. |
|
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4660 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
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4661 // both of which need setting by set_n_termination(). |
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4662 _g1h->SharedHeap::set_n_termination(active_workers); |
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4663 _g1h->set_n_termination(active_workers); |
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|
4664 terminator()->reset_for_reuse(active_workers); |
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4665 _n_workers = active_workers; |
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|
4666 } |
|
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|
4667 |
|
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4668 // Helps out with CLD processing. |
|
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4669 // |
|
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4670 // During InitialMark we need to: |
|
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4671 // 1) Scavenge all CLDs for the young GC. |
|
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4672 // 2) Mark all objects directly reachable from strong CLDs. |
|
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4673 template <G1Mark do_mark_object> |
|
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4674 class G1CLDClosure : public CLDClosure { |
|
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4675 G1ParCopyClosure<G1BarrierNone, do_mark_object>* _oop_closure; |
|
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4676 G1ParCopyClosure<G1BarrierKlass, do_mark_object> _oop_in_klass_closure; |
|
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4677 G1KlassScanClosure _klass_in_cld_closure; |
|
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4678 bool _claim; |
|
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4679 |
|
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|
4680 public: |
|
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|
4681 G1CLDClosure(G1ParCopyClosure<G1BarrierNone, do_mark_object>* oop_closure, |
|
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4682 bool only_young, bool claim) |
|
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4683 : _oop_closure(oop_closure), |
|
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4684 _oop_in_klass_closure(oop_closure->g1(), |
|
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|
4685 oop_closure->pss(), |
|
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|
4686 oop_closure->rp()), |
|
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4687 _klass_in_cld_closure(&_oop_in_klass_closure, only_young), |
|
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|
4688 _claim(claim) { |
|
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|
4689 |
|
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|
4690 } |
|
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|
4691 |
|
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|
4692 void do_cld(ClassLoaderData* cld) { |
|
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4693 cld->oops_do(_oop_closure, &_klass_in_cld_closure, _claim); |
|
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4694 } |
|
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|
4695 }; |
|
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|
4696 |
|
4728
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|
4697 void work(uint worker_id) { |
|
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|
4698 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 4699 |
| 4700 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
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changeset
|
4701 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 4702 |
|
5986
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|
4703 { |
|
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|
4704 ResourceMark rm; |
|
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|
4705 HandleMark hm; |
|
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|
4706 |
|
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|
4707 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
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|
4708 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
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17688
diff
changeset
|
4709 G1ParScanThreadState pss(_g1h, worker_id, rp); |
|
5986
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|
4710 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
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|
4711 |
|
5986
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|
4712 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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|
4713 |
|
20278
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|
4714 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
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|
4715 |
|
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|
4716 // Non-IM young GC. |
|
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|
4717 G1ParCopyClosure<G1BarrierNone, G1MarkNone> scan_only_root_cl(_g1h, &pss, rp); |
|
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|
4718 G1CLDClosure<G1MarkNone> scan_only_cld_cl(&scan_only_root_cl, |
|
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|
4719 only_young, // Only process dirty klasses. |
|
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|
4720 false); // No need to claim CLDs. |
|
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|
4721 // IM young GC. |
|
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|
4722 // Strong roots closures. |
|
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|
4723 G1ParCopyClosure<G1BarrierNone, G1MarkFromRoot> scan_mark_root_cl(_g1h, &pss, rp); |
|
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|
4724 G1CLDClosure<G1MarkFromRoot> scan_mark_cld_cl(&scan_mark_root_cl, |
|
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|
4725 false, // Process all klasses. |
|
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|
4726 true); // Need to claim CLDs. |
|
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|
4727 // Weak roots closures. |
|
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|
4728 G1ParCopyClosure<G1BarrierNone, G1MarkPromotedFromRoot> scan_mark_weak_root_cl(_g1h, &pss, rp); |
|
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|
4729 G1CLDClosure<G1MarkPromotedFromRoot> scan_mark_weak_cld_cl(&scan_mark_weak_root_cl, |
|
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|
4730 false, // Process all klasses. |
|
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|
4731 true); // Need to claim CLDs. |
|
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|
4732 |
|
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|
4733 G1CodeBlobClosure scan_only_code_cl(&scan_only_root_cl); |
|
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|
4734 G1CodeBlobClosure scan_mark_code_cl(&scan_mark_root_cl); |
|
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|
4735 // IM Weak code roots are handled later. |
|
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|
4736 |
|
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|
4737 OopClosure* strong_root_cl; |
|
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|
4738 OopClosure* weak_root_cl; |
|
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|
4739 CLDClosure* strong_cld_cl; |
|
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|
4740 CLDClosure* weak_cld_cl; |
|
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|
4741 CodeBlobClosure* strong_code_cl; |
|
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|
4742 |
|
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|
4743 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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|
4744 // We also need to mark copied objects. |
|
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|
4745 strong_root_cl = &scan_mark_root_cl; |
|
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|
4746 strong_cld_cl = &scan_mark_cld_cl; |
|
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|
4747 strong_code_cl = &scan_mark_code_cl; |
|
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|
4748 if (ClassUnloadingWithConcurrentMark) { |
|
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changeset
|
4749 weak_root_cl = &scan_mark_weak_root_cl; |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
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20279
diff
changeset
|
4750 weak_cld_cl = &scan_mark_weak_cld_cl; |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
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diff
changeset
|
4751 } else { |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
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diff
changeset
|
4752 weak_root_cl = &scan_mark_root_cl; |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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20279
diff
changeset
|
4753 weak_cld_cl = &scan_mark_cld_cl; |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
changeset
|
4754 } |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4755 } else { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4756 strong_root_cl = &scan_only_root_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4757 weak_root_cl = &scan_only_root_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4758 strong_cld_cl = &scan_only_cld_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4759 weak_cld_cl = &scan_only_cld_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4760 strong_code_cl = &scan_only_code_cl; |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4761 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4762 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4763 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4764 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4765 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4766 pss.start_strong_roots(); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4767 _g1h->g1_process_roots(strong_root_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4768 weak_root_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4769 &push_heap_rs_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4770 strong_cld_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4771 weak_cld_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4772 strong_code_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4773 worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4774 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4775 pss.end_strong_roots(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4776 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4777 { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4778 double start = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4779 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4780 evac.do_void(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4781 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
|
4782 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
|
4783 _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
|
4784 _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
|
4785 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4786 _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
|
4787 _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
|
4788 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4789 if (ParallelGCVerbose) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4790 MutexLocker x(stats_lock()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4791 pss.print_termination_stats(worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4792 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4793 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4794 assert(pss.queue_is_empty(), "should be empty"); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4795 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4796 // 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
|
4797 // 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
|
4798 // "GC Worker Time". |
| 342 | 4799 } |
| 4800 | |
| 1611 | 4801 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
|
4802 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 4803 } |
| 4804 }; | |
| 4805 | |
| 4806 // *** Common G1 Evacuation Stuff | |
| 4807 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4808 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4809 |
| 342 | 4810 void |
| 4811 G1CollectedHeap:: | |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4812 g1_process_roots(OopClosure* scan_non_heap_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4813 OopClosure* scan_non_heap_weak_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4814 OopsInHeapRegionClosure* scan_rs, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4815 CLDClosure* scan_strong_clds, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4816 CLDClosure* scan_weak_clds, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4817 CodeBlobClosure* scan_strong_code, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4818 uint worker_i) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4819 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4820 // First scan the shared roots. |
| 342 | 4821 double ext_roots_start = os::elapsedTime(); |
| 4822 double closure_app_time_sec = 0.0; | |
| 4823 | |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4824 bool during_im = _g1h->g1_policy()->during_initial_mark_pause(); |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4825 bool trace_metadata = during_im && ClassUnloadingWithConcurrentMark; |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4826 |
| 342 | 4827 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4828 BufferingOopClosure buf_scan_non_heap_weak_roots(scan_non_heap_weak_roots); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4829 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4830 process_roots(false, // no scoping; this is parallel code |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4831 SharedHeap::SO_None, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4832 &buf_scan_non_heap_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4833 &buf_scan_non_heap_weak_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4834 scan_strong_clds, |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4835 // Unloading Initial Marks handle the weak CLDs separately. |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4836 (trace_metadata ? NULL : scan_weak_clds), |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4837 scan_strong_code); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4838 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4839 // 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
|
4840 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
|
4841 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4842 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4843 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4844 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4845 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
|
4846 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4847 |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4848 if (trace_metadata) { |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4849 // Barrier to make sure all workers passed |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4850 // the strong CLD and strong nmethods phases. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4851 active_strong_roots_scope()->wait_until_all_workers_done_with_threads(n_par_threads()); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4852 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4853 // Now take the complement of the strong CLDs. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4854 ClassLoaderDataGraph::roots_cld_do(NULL, scan_weak_clds); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4855 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4856 |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4857 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 4858 buf_scan_non_heap_roots.done(); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4859 buf_scan_non_heap_weak_roots.done(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4860 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4861 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds() |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4862 + buf_scan_non_heap_weak_roots.closure_app_seconds(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4863 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4864 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
|
4865 |
| 342 | 4866 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
|
4867 ((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
|
4868 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4869 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 4870 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4871 // 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
|
4872 // 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
|
4873 // 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
|
4874 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4875 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4876 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
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6611
diff
changeset
|
4877 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
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6611
diff
changeset
|
4878 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4879 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
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6611
diff
changeset
|
4880 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
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6611
diff
changeset
|
4881 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4882 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4883 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4884 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 4885 |
| 4886 // Now scan the complement of the collection set. | |
| 20494 | 4887 G1CodeBlobClosure scavenge_cs_nmethods(scan_non_heap_weak_roots); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4888 |
|
2c6ef90f030a
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20274
diff
changeset
|
4889 g1_rem_set()->oops_into_collection_set_do(scan_rs, &scavenge_cs_nmethods, worker_i); |
|
20256
b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
stefank
parents:
20254
diff
changeset
|
4890 |
| 342 | 4891 _process_strong_tasks->all_tasks_completed(); |
| 4892 } | |
| 4893 | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
4894 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4895 private: |
|
5a32d2a3cc1e
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diff
changeset
|
4896 BoolObjectClosure* _is_alive; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
4897 int _initial_string_table_size; |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4898 int _initial_symbol_table_size; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
4899 |
|
5a32d2a3cc1e
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13400
diff
changeset
|
4900 bool _process_strings; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
4901 int _strings_processed; |
|
5a32d2a3cc1e
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diff
changeset
|
4902 int _strings_removed; |
|
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diff
changeset
|
4903 |
|
5a32d2a3cc1e
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diff
changeset
|
4904 bool _process_symbols; |
|
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diff
changeset
|
4905 int _symbols_processed; |
|
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changeset
|
4906 int _symbols_removed; |
|
17652
0eb64cfc0b76
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tschatzl
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17651
diff
changeset
|
4907 |
|
0eb64cfc0b76
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diff
changeset
|
4908 bool _do_in_parallel; |
|
17634
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|
4909 public: |
|
5a32d2a3cc1e
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|
4910 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
|
20278
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changeset
|
4911 AbstractGangTask("String/Symbol Unlinking"), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4912 _is_alive(is_alive), |
|
17652
0eb64cfc0b76
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tschatzl
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17651
diff
changeset
|
4913 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
|
17634
5a32d2a3cc1e
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|
4914 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
|
5a32d2a3cc1e
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|
4915 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
4916 |
|
5a32d2a3cc1e
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diff
changeset
|
4917 _initial_string_table_size = StringTable::the_table()->table_size(); |
|
5a32d2a3cc1e
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|
4918 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
4919 if (process_strings) { |
|
5a32d2a3cc1e
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diff
changeset
|
4920 StringTable::clear_parallel_claimed_index(); |
|
5a32d2a3cc1e
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diff
changeset
|
4921 } |
|
5a32d2a3cc1e
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diff
changeset
|
4922 if (process_symbols) { |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4923 SymbolTable::clear_parallel_claimed_index(); |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4924 } |
|
5a32d2a3cc1e
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13400
diff
changeset
|
4925 } |
|
5a32d2a3cc1e
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parents:
13400
diff
changeset
|
4926 |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
4927 ~G1StringSymbolTableUnlinkTask() { |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4928 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
4929 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4930 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4931 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4932 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4933 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4934 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4935 if (G1TraceStringSymbolTableScrubbing) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4936 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4937 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4938 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4939 strings_processed(), strings_removed(), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4940 symbols_processed(), symbols_removed()); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4941 } |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4942 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4943 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4944 void work(uint worker_id) { |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4945 if (_do_in_parallel) { |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4946 int strings_processed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4947 int strings_removed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4948 int symbols_processed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4949 int symbols_removed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4950 if (_process_strings) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4951 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4952 Atomic::add(strings_processed, &_strings_processed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4953 Atomic::add(strings_removed, &_strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4954 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4955 if (_process_symbols) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4956 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4957 Atomic::add(symbols_processed, &_symbols_processed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4958 Atomic::add(symbols_removed, &_symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4959 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4960 } else { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4961 if (_process_strings) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4962 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4963 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4964 if (_process_symbols) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4965 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4966 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4967 } |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
4968 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4969 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4970 size_t strings_processed() const { return (size_t)_strings_processed; } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4971 size_t strings_removed() const { return (size_t)_strings_removed; } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4972 |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
4973 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
4974 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4975 }; |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4976 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4977 class G1CodeCacheUnloadingTask VALUE_OBJ_CLASS_SPEC { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4978 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4979 static Monitor* _lock; |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4980 |
|
2c6ef90f030a
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20274
diff
changeset
|
4981 BoolObjectClosure* const _is_alive; |
|
2c6ef90f030a
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stefank
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changeset
|
4982 const bool _unloading_occurred; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4983 const uint _num_workers; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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changeset
|
4984 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4985 // Variables used to claim nmethods. |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4986 nmethod* _first_nmethod; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4987 volatile nmethod* _claimed_nmethod; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4988 |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4989 // The list of nmethods that need to be processed by the second pass. |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4990 volatile nmethod* _postponed_list; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4991 volatile uint _num_entered_barrier; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4992 |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4993 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4994 G1CodeCacheUnloadingTask(uint num_workers, BoolObjectClosure* is_alive, bool unloading_occurred) : |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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changeset
|
4995 _is_alive(is_alive), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4996 _unloading_occurred(unloading_occurred), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4997 _num_workers(num_workers), |
|
2c6ef90f030a
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|
4998 _first_nmethod(NULL), |
|
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|
4999 _claimed_nmethod(NULL), |
|
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|
5000 _postponed_list(NULL), |
|
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|
5001 _num_entered_barrier(0) |
|
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diff
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|
5002 { |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5003 nmethod::increase_unloading_clock(); |
|
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|
5004 _first_nmethod = CodeCache::alive_nmethod(CodeCache::first()); |
|
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|
5005 _claimed_nmethod = (volatile nmethod*)_first_nmethod; |
|
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|
5006 } |
|
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diff
changeset
|
5007 |
|
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diff
changeset
|
5008 ~G1CodeCacheUnloadingTask() { |
|
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diff
changeset
|
5009 CodeCache::verify_clean_inline_caches(); |
|
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|
5010 |
|
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changeset
|
5011 CodeCache::set_needs_cache_clean(false); |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
5012 guarantee(CodeCache::scavenge_root_nmethods() == NULL, "Must be"); |
|
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|
5013 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5014 CodeCache::verify_icholder_relocations(); |
|
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changeset
|
5015 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5016 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5017 private: |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5018 void add_to_postponed_list(nmethod* nm) { |
|
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diff
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|
5019 nmethod* old; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5020 do { |
|
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diff
changeset
|
5021 old = (nmethod*)_postponed_list; |
|
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changeset
|
5022 nm->set_unloading_next(old); |
|
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|
5023 } while ((nmethod*)Atomic::cmpxchg_ptr(nm, &_postponed_list, old) != old); |
|
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|
5024 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5025 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5026 void clean_nmethod(nmethod* nm) { |
|
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diff
changeset
|
5027 bool postponed = nm->do_unloading_parallel(_is_alive, _unloading_occurred); |
|
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diff
changeset
|
5028 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5029 if (postponed) { |
|
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changeset
|
5030 // This nmethod referred to an nmethod that has not been cleaned/unloaded yet. |
|
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|
5031 add_to_postponed_list(nm); |
|
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diff
changeset
|
5032 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5033 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5034 // Mark that this thread has been cleaned/unloaded. |
|
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changeset
|
5035 // After this call, it will be safe to ask if this nmethod was unloaded or not. |
|
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changeset
|
5036 nm->set_unloading_clock(nmethod::global_unloading_clock()); |
|
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|
5037 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5038 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5039 void clean_nmethod_postponed(nmethod* nm) { |
|
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changeset
|
5040 nm->do_unloading_parallel_postponed(_is_alive, _unloading_occurred); |
|
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changeset
|
5041 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5042 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5043 static const int MaxClaimNmethods = 16; |
|
2c6ef90f030a
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diff
changeset
|
5044 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5045 void claim_nmethods(nmethod** claimed_nmethods, int *num_claimed_nmethods) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
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|
5046 nmethod* first; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5047 nmethod* last; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5048 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5049 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5050 *num_claimed_nmethods = 0; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5051 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5052 first = last = (nmethod*)_claimed_nmethod; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5053 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5054 if (first != NULL) { |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5055 for (int i = 0; i < MaxClaimNmethods; i++) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5056 last = CodeCache::alive_nmethod(CodeCache::next(last)); |
|
2c6ef90f030a
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diff
changeset
|
5057 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5058 if (last == NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5059 break; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5060 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5061 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5062 claimed_nmethods[i] = last; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5063 (*num_claimed_nmethods)++; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5064 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
20274
diff
changeset
|
5065 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5066 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5067 } while ((nmethod*)Atomic::cmpxchg_ptr(last, &_claimed_nmethod, first) != first); |
|
2c6ef90f030a
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diff
changeset
|
5068 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5069 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5070 nmethod* claim_postponed_nmethod() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5071 nmethod* claim; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5072 nmethod* next; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5073 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5074 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5075 claim = (nmethod*)_postponed_list; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5076 if (claim == NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5077 return NULL; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5078 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5079 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5080 next = claim->unloading_next(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5081 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
5082 } while ((nmethod*)Atomic::cmpxchg_ptr(next, &_postponed_list, claim) != claim); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5083 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5084 return claim; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5085 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5086 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5087 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5088 // Mark that we're done with the first pass of nmethod cleaning. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5089 void barrier_mark(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5090 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5091 _num_entered_barrier++; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5092 if (_num_entered_barrier == _num_workers) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5093 ml.notify_all(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5094 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
20274
diff
changeset
|
5095 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5096 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5097 // See if we have to wait for the other workers to |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5098 // finish their first-pass nmethod cleaning work. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5099 void barrier_wait(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5100 if (_num_entered_barrier < _num_workers) { |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5101 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5102 while (_num_entered_barrier < _num_workers) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5103 ml.wait(Mutex::_no_safepoint_check_flag, 0, false); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5104 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5105 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5106 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5107 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5108 // Cleaning and unloading of nmethods. Some work has to be postponed |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5109 // to the second pass, when we know which nmethods survive. |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5110 void work_first_pass(uint worker_id) { |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5111 // The first nmethods is claimed by the first worker. |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5112 if (worker_id == 0 && _first_nmethod != NULL) { |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5113 clean_nmethod(_first_nmethod); |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5114 _first_nmethod = NULL; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5115 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5116 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5117 int num_claimed_nmethods; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5118 nmethod* claimed_nmethods[MaxClaimNmethods]; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5119 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5120 while (true) { |
|
2c6ef90f030a
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diff
changeset
|
5121 claim_nmethods(claimed_nmethods, &num_claimed_nmethods); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5122 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5123 if (num_claimed_nmethods == 0) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5124 break; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5125 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5126 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5127 for (int i = 0; i < num_claimed_nmethods; i++) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5128 clean_nmethod(claimed_nmethods[i]); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5129 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5130 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5131 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5132 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5133 void work_second_pass(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5134 nmethod* nm; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5135 // Take care of postponed nmethods. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5136 while ((nm = claim_postponed_nmethod()) != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5137 clean_nmethod_postponed(nm); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5138 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5139 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5140 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5141 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5142 Monitor* G1CodeCacheUnloadingTask::_lock = new Monitor(Mutex::leaf, "Code Cache Unload lock"); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5143 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5144 class G1KlassCleaningTask : public StackObj { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5145 BoolObjectClosure* _is_alive; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5146 volatile jint _clean_klass_tree_claimed; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5147 ClassLoaderDataGraphKlassIteratorAtomic _klass_iterator; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5148 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5149 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5150 G1KlassCleaningTask(BoolObjectClosure* is_alive) : |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5151 _is_alive(is_alive), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5152 _clean_klass_tree_claimed(0), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5153 _klass_iterator() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5154 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5155 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5156 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5157 bool claim_clean_klass_tree_task() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5158 if (_clean_klass_tree_claimed) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5159 return false; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5160 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5161 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5162 return Atomic::cmpxchg(1, (jint*)&_clean_klass_tree_claimed, 0) == 0; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5163 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5164 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5165 InstanceKlass* claim_next_klass() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5166 Klass* klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5167 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5168 klass =_klass_iterator.next_klass(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5169 } while (klass != NULL && !klass->oop_is_instance()); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5170 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5171 return (InstanceKlass*)klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5172 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5173 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5174 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5175 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5176 void clean_klass(InstanceKlass* ik) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5177 ik->clean_implementors_list(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5178 ik->clean_method_data(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5179 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5180 // G1 specific cleanup work that has |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5181 // been moved here to be done in parallel. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5182 ik->clean_dependent_nmethods(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5183 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5184 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5185 void work() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5186 ResourceMark rm; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5187 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5188 // One worker will clean the subklass/sibling klass tree. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5189 if (claim_clean_klass_tree_task()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5190 Klass::clean_subklass_tree(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5191 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5192 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5193 // All workers will help cleaning the classes, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5194 InstanceKlass* klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5195 while ((klass = claim_next_klass()) != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5196 clean_klass(klass); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5197 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5198 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5199 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5200 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5201 // To minimize the remark pause times, the tasks below are done in parallel. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5202 class G1ParallelCleaningTask : public AbstractGangTask { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5203 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5204 G1StringSymbolTableUnlinkTask _string_symbol_task; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5205 G1CodeCacheUnloadingTask _code_cache_task; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5206 G1KlassCleaningTask _klass_cleaning_task; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5207 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5208 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5209 // The constructor is run in the VMThread. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5210 G1ParallelCleaningTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols, uint num_workers, bool unloading_occurred) : |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5211 AbstractGangTask("Parallel Cleaning"), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5212 _string_symbol_task(is_alive, process_strings, process_symbols), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5213 _code_cache_task(num_workers, is_alive, unloading_occurred), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5214 _klass_cleaning_task(is_alive) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5215 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5216 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5217 // The parallel work done by all worker threads. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5218 void work(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5219 // Do first pass of code cache cleaning. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5220 _code_cache_task.work_first_pass(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5221 |
| 20279 | 5222 // Let the threads mark that the first pass is done. |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5223 _code_cache_task.barrier_mark(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5224 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5225 // Clean the Strings and Symbols. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5226 _string_symbol_task.work(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5227 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5228 // Wait for all workers to finish the first code cache cleaning pass. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5229 _code_cache_task.barrier_wait(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5230 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5231 // Do the second code cache cleaning work, which realize on |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5232 // the liveness information gathered during the first pass. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5233 _code_cache_task.work_second_pass(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5234 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5235 // Clean all klasses that were not unloaded. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5236 _klass_cleaning_task.work(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5237 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5238 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5239 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5240 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5241 void G1CollectedHeap::parallel_cleaning(BoolObjectClosure* is_alive, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5242 bool process_strings, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5243 bool process_symbols, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5244 bool class_unloading_occurred) { |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5245 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5246 workers()->active_workers() : 1); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5247 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5248 G1ParallelCleaningTask g1_unlink_task(is_alive, process_strings, process_symbols, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5249 n_workers, class_unloading_occurred); |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5250 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5251 set_par_threads(n_workers); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5252 workers()->run_task(&g1_unlink_task); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5253 set_par_threads(0); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5254 } else { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5255 g1_unlink_task.work(0); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5256 } |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5257 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5258 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5259 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5260 bool process_strings, bool process_symbols) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5261 { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5262 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5263 _g1h->workers()->active_workers() : 1); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5264 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5265 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5266 set_par_threads(n_workers); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5267 workers()->run_task(&g1_unlink_task); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5268 set_par_threads(0); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5269 } else { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5270 g1_unlink_task.work(0); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5271 } |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5272 } |
| 17764 | 5273 |
| 5274 if (G1StringDedup::is_enabled()) { | |
| 5275 G1StringDedup::unlink(is_alive); | |
| 5276 } | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5277 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5278 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5279 class G1RedirtyLoggedCardsTask : public AbstractGangTask { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5280 private: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5281 DirtyCardQueueSet* _queue; |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5282 public: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5283 G1RedirtyLoggedCardsTask(DirtyCardQueueSet* queue) : AbstractGangTask("Redirty Cards"), _queue(queue) { } |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5284 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5285 virtual void work(uint worker_id) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5286 double start_time = os::elapsedTime(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5287 |
|
20217
6b52700a896b
8040002: Clean up code and code duplication in re-diryting cards for verification
tschatzl
parents:
20216
diff
changeset
|
5288 RedirtyLoggedCardTableEntryClosure cl; |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5289 if (G1CollectedHeap::heap()->use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5290 _queue->par_apply_closure_to_all_completed_buffers(&cl); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5291 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5292 _queue->apply_closure_to_all_completed_buffers(&cl); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5293 } |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5294 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5295 G1GCPhaseTimes* timer = G1CollectedHeap::heap()->g1_policy()->phase_times(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5296 timer->record_redirty_logged_cards_time_ms(worker_id, (os::elapsedTime() - start_time) * 1000.0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5297 timer->record_redirty_logged_cards_processed_cards(worker_id, cl.num_processed()); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5298 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5299 }; |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5300 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5301 void G1CollectedHeap::redirty_logged_cards() { |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5302 double redirty_logged_cards_start = os::elapsedTime(); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5303 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5304 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5305 _g1h->workers()->active_workers() : 1); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5306 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5307 G1RedirtyLoggedCardsTask redirty_task(&dirty_card_queue_set()); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5308 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
|
5309 if (use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5310 set_par_threads(n_workers); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5311 workers()->run_task(&redirty_task); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5312 set_par_threads(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5313 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5314 redirty_task.work(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5315 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5316 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5317 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5318 dcq.merge_bufferlists(&dirty_card_queue_set()); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5319 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5320 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5321 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5322 } |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5323 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5324 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5325 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5326 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5327 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5328 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5329 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5330 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5331 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5332 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5333 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5334 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5335 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5336 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5337 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5338 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5339 } |
|
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 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5342 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5343 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5345 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5354 void do_oop(oop* p) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5355 oop obj = *p; |
|
20503
fa56205f142c
8057799: Unnecessary NULL check in G1KeepAliveClosure
tonyp
parents:
20494
diff
changeset
|
5356 assert(obj != NULL, "the caller should have filtered out NULL values"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5357 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5358 G1CollectedHeap::in_cset_state_t cset_state = _g1->in_cset_state(obj); |
|
20503
fa56205f142c
8057799: Unnecessary NULL check in G1KeepAliveClosure
tonyp
parents:
20494
diff
changeset
|
5359 if (cset_state == G1CollectedHeap::InNeither) { |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5360 return; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5361 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5362 if (cset_state == G1CollectedHeap::InCSet) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5363 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5364 *p = obj->forwardee(); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5365 } else { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5366 assert(!obj->is_forwarded(), "invariant" ); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5367 assert(cset_state == G1CollectedHeap::IsHumongous, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5368 err_msg("Only allowed InCSet state is IsHumongous, but is %d", cset_state)); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5369 _g1->set_humongous_is_live(obj); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 } |
|
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 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5373 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5374 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5375 // serial and parallel code as long as different worker |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5377 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5378 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5379 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5380 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5381 OopClosure* _copy_non_heap_obj_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5382 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5383 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5385 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5386 OopClosure* non_heap_obj_cl, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5387 G1ParScanThreadState* pss): |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5388 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 _par_scan_state(pss) |
|
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 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5394 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5396 template <class T> void do_oop_work(T* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5399 if (_g1h->is_in_cset_or_humongous(obj)) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5400 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 // 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
|
5402 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5403 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5404 // heap, update the RSet for the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5405 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5406 // 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
|
5407 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5408 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5409 // 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
|
5410 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5411 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5412 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5413 // 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
|
5414 // use the the non-heap or metadata closures directly to copy |
| 10405 | 5415 // the referent object and update the pointer, while avoiding |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5416 // updating the RSet. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5417 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5418 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5419 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5420 } else { |
|
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17866
diff
changeset
|
5421 assert(!Metaspace::contains((const void*)p), |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5422 err_msg("Unexpectedly found a pointer from metadata: " |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5423 PTR_FORMAT, p)); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5424 _copy_non_heap_obj_cl->do_oop(p); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5425 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5426 } |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5427 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5428 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5429 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5430 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5431 // closure for each discovered list in some of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5432 // reference processing phases. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5433 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5434 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5435 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5436 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5437 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5438 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5439 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5440 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5442 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5443 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5444 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 void do_void() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5448 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 pss->trim_queue(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5450 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5451 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5452 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5453 // Parallel Reference Processing closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5455 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5456 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5457 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5458 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5459 private: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5460 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5461 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5462 FlexibleWorkGang* _workers; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5463 int _active_workers; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5464 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5465 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5466 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5467 FlexibleWorkGang* workers, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5468 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5469 int n_workers) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5470 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5471 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5472 _workers(workers), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5473 _active_workers(n_workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5474 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5475 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5476 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5477 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5478 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5479 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5480 virtual void execute(EnqueueTask& task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5481 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5482 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5483 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5484 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5485 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5486 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5487 ProcessTask& _proc_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5488 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5489 RefToScanQueueSet *_task_queues; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5490 ParallelTaskTerminator* _terminator; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5491 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5492 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5493 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
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|
5494 G1CollectedHeap* g1h, |
|
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|
5495 RefToScanQueueSet *task_queues, |
|
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|
5496 ParallelTaskTerminator* terminator) : |
|
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|
5497 AbstractGangTask("Process reference objects in parallel"), |
|
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|
5498 _proc_task(proc_task), |
|
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changeset
|
5499 _g1h(g1h), |
|
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|
5500 _task_queues(task_queues), |
|
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|
5501 _terminator(terminator) |
|
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|
5502 {} |
|
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|
5503 |
|
4728
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|
5504 virtual void work(uint worker_id) { |
|
3979
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|
5505 // The reference processing task executed by a single worker. |
|
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|
5506 ResourceMark rm; |
|
4dfb2df418f2
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diff
changeset
|
5507 HandleMark hm; |
|
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changeset
|
5508 |
|
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changeset
|
5509 G1STWIsAliveClosure is_alive(_g1h); |
|
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|
5510 |
|
17689
5d492d192cbf
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|
5511 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
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|
5512 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
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|
5513 |
|
3979
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|
5514 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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|
5515 |
|
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changeset
|
5516 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
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|
5517 |
|
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|
5518 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
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|
5519 |
|
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|
5520 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
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|
5521 |
|
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changeset
|
5522 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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|
5523 // We also need to mark copied objects. |
|
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changeset
|
5524 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
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|
5525 } |
|
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changeset
|
5526 |
|
4dfb2df418f2
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changeset
|
5527 // Keep alive closure. |
|
20270
b7d24d2bc8be
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parents:
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|
5528 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
|
3979
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|
5529 |
|
4dfb2df418f2
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|
5530 // Complete GC closure |
|
4dfb2df418f2
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changeset
|
5531 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
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|
5532 |
|
4dfb2df418f2
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diff
changeset
|
5533 // Call the reference processing task's work routine. |
|
4728
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|
5534 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
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|
5535 |
|
4dfb2df418f2
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diff
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|
5536 // Note we cannot assert that the refs array is empty here as not all |
|
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|
5537 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
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|
5538 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
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|
5539 // the queue may not be empty. |
|
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parents:
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|
5540 } |
|
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diff
changeset
|
5541 }; |
|
4dfb2df418f2
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diff
changeset
|
5542 |
|
4dfb2df418f2
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diff
changeset
|
5543 // Driver routine for parallel reference processing. |
|
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diff
changeset
|
5544 // Creates an instance of the ref processing gang |
|
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changeset
|
5545 // task and has the worker threads execute it. |
|
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|
5546 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
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changeset
|
5547 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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changeset
|
5548 |
|
4dfb2df418f2
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diff
changeset
|
5549 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
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changeset
|
5550 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
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changeset
|
5551 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5552 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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diff
changeset
|
5553 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
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diff
changeset
|
5554 _g1h->set_par_threads(0); |
|
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diff
changeset
|
5555 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5556 |
|
4dfb2df418f2
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diff
changeset
|
5557 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5558 |
|
4dfb2df418f2
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diff
changeset
|
5559 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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changeset
|
5560 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
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changeset
|
5561 EnqueueTask& _enq_task; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5562 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5563 public: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5564 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5565 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5566 _enq_task(enq_task) |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5567 { } |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5568 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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diff
changeset
|
5569 virtual void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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diff
changeset
|
5570 _enq_task.work(worker_id); |
|
3979
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parents:
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diff
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|
5571 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5572 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5573 |
| 10405 | 5574 // Driver routine for parallel reference enqueueing. |
|
3979
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diff
changeset
|
5575 // Creates an instance of the ref enqueueing gang |
|
4dfb2df418f2
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diff
changeset
|
5576 // task and has the worker threads execute it. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5577 |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5578 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5579 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5580 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5581 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5582 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5583 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5584 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5585 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5586 } |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5587 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5588 // End of weak reference support closures |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5589 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5590 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5591 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5592 // objects discovered by the CM ref processor. |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5593 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5594 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5595 protected: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5596 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5597 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5598 ParallelTaskTerminator _terminator; |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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changeset
|
5599 uint _n_workers; |
|
3979
4dfb2df418f2
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diff
changeset
|
5600 |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5601 public: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5602 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5603 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5604 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5605 _queues(task_queues), |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5606 _terminator(workers, _queues), |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5607 _n_workers(workers) |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5608 { } |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5609 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5610 void work(uint worker_id) { |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5611 ResourceMark rm; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5612 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
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
6484982: G1: process references during evacuation pauses
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parents:
3973
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
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parents:
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diff
changeset
|
5617 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5618 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5619 assert(pss.queue_is_empty(), "both queue and overflow should be empty"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5620 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5621 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5622 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5623 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5624 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5625 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5626 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5627 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5628 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5629 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5630 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5631 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5632 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5633 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5634 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5635 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5636 // to be copied. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5637 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5638 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5639 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5640 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5641 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
|
5642 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
|
5643 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5644 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5645 // So this must be true - but assert just in case someone decides to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5646 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5647 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5648 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5649 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5650 // 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
|
5651 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5652 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5653 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5654 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5655 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5656 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5657 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5658 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5659 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5660 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5661 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5662 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5663 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5665 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5666 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5667 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5668 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5669 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5671 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5672 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5673 assert(pss.queue_is_empty(), "should be"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5674 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5675 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5676 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5677 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5678 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5679 double ref_proc_start = os::elapsedTime(); |
|
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 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5682 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5683 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5684 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5685 // by the CM ref processor should have already been copied (either by |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5686 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5687 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5688 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5689 // 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
|
5690 // 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
|
5691 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5693 // but would not have treated the reference object as a regular oop. |
| 10405 | 5694 // As a result the copy closure would not have been applied to the |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5695 // referent object. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5696 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5697 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5698 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5699 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5700 // 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
|
5701 // 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
|
5702 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 |
| 4711 | 5705 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5706 no_of_gc_workers == workers()->active_workers(), |
| 5707 "Need to reset active GC workers"); | |
| 5708 | |
| 5709 set_par_threads(no_of_gc_workers); | |
| 5710 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5711 no_of_gc_workers, | |
| 5712 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5713 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5714 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5715 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5716 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5717 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5718 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5719 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5721 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 G1STWIsAliveClosure is_alive(this); |
|
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 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 // 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
|
5727 // 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
|
5728 // JNI refs. |
|
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 // Use only a single queue for this PSS. |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5731 G1ParScanThreadState pss(this, 0, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5732 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5735 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5736 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5737 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5738 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5739 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5740 assert(pss.queue_is_empty(), "pre-condition"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5741 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5743 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5744 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5745 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5746 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5747 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5748 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5749 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5750 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5751 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5752 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5753 // Keep alive closure. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5754 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, &pss); |
|
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 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5757 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5758 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5759 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5760 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5761 |
| 10405 | 5762 ReferenceProcessorStats stats; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5763 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5764 // Serial reference processing... |
| 10405 | 5765 stats = rp->process_discovered_references(&is_alive, |
| 5766 &keep_alive, | |
| 5767 &drain_queue, | |
| 5768 NULL, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5769 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5770 _gc_tracer_stw->gc_id()); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5771 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5772 // Parallel reference processing |
| 6819 | 5773 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5774 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5775 | |
| 5776 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
| 10405 | 5777 stats = rp->process_discovered_references(&is_alive, |
| 5778 &keep_alive, | |
| 5779 &drain_queue, | |
| 5780 &par_task_executor, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5781 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5782 _gc_tracer_stw->gc_id()); |
| 10405 | 5783 } |
| 5784 | |
| 5785 _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
|
5786 |
|
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5787 // We have completed copying any necessary live referent objects. |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5788 assert(pss.queue_is_empty(), "both queue and overflow should be empty"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5789 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5790 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
|
5791 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
|
5792 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5793 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5794 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5795 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5796 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5797 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5798 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5799 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
|
5800 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5801 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5802 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5803 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5804 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5805 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5806 } else { |
| 10405 | 5807 // Parallel reference enqueueing |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5808 |
| 6819 | 5809 assert(no_of_gc_workers == workers()->active_workers(), |
| 5810 "Need to reset active workers"); | |
| 5811 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5812 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5813 | |
| 5814 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
|
5815 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5816 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5817 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5818 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5819 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5820 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5821 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5822 // 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
|
5823 // Should we do that here also? We could, but it is a serial operation |
| 10405 | 5824 // and could significantly increase the pause time. |
|
3979
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 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
|
5827 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
|
5828 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5829 |
| 10405 | 5830 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
|
5831 _expand_heap_after_alloc_failure = true; |
| 10405 | 5832 _evacuation_failed = false; |
| 342 | 5833 |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5834 // 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
|
5835 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
|
5836 |
| 342 | 5837 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
|
5838 |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5839 // Disable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5840 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
|
5841 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
|
5842 hot_card_cache->set_use_cache(false); |
| 889 | 5843 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5844 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5845 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5846 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5847 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5848 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5849 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5850 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5851 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5852 "If not dynamic should be using all the workers"); |
| 4711 | 5853 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5854 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5855 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5856 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5857 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5858 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5859 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5860 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5861 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5862 |
| 5863 init_for_evac_failure(NULL); | |
| 5864 | |
| 5865 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
|
5866 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5867 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
|
5868 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5869 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5870 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5871 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5872 StrongRootsScope srs(this); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5873 // InitialMark needs claim bits to keep track of the marked-through CLDs. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5874 if (g1_policy()->during_initial_mark_pause()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5875 ClassLoaderDataGraph::clear_claimed_marks(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5876 } |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5877 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5878 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5879 // 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
|
5880 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5881 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5882 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5883 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5884 "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
|
5885 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5886 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5887 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
|
5888 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5889 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5890 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5891 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5892 // 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
|
5893 // 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
|
5894 // 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
|
5895 // 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
|
5896 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5897 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5898 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5899 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
|
5900 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
|
5901 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5902 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5903 (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
|
5904 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
|
5905 |
| 342 | 5906 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5907 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5908 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5909 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5910 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5911 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5912 // not copied during the pause. |
| 6819 | 5913 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5914 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5915 // Weak root processing. |
| 342 | 5916 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5917 G1STWIsAliveClosure is_alive(this); |
| 342 | 5918 G1KeepAliveClosure keep_alive(this); |
| 5919 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 17764 | 5920 if (G1StringDedup::is_enabled()) { |
| 5921 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
| 5922 } | |
| 342 | 5923 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5924 |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
5925 _allocator->release_gc_alloc_regions(n_workers, evacuation_info); |
| 342 | 5926 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
|
5927 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5928 // 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
|
5929 // 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
|
5930 // 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
|
5931 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
|
5932 hot_card_cache->set_use_cache(true); |
| 342 | 5933 |
|
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5934 purge_code_root_memory(); |
|
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5935 |
| 12080 | 5936 if (g1_policy()->during_initial_mark_pause()) { |
| 5937 // Reset the claim values set during marking the strong code roots | |
| 5938 reset_heap_region_claim_values(); | |
| 5939 } | |
| 5940 | |
| 342 | 5941 finalize_for_evac_failure(); |
| 5942 | |
| 5943 if (evacuation_failed()) { | |
| 5944 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5945 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5946 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5947 // 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
|
5948 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5949 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 5950 } |
| 5951 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5952 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5953 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5954 // this after the card table is cleaned (and verified) as |
| 10405 | 5955 // the act of enqueueing entries on to the pending list |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5956 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5957 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5958 // RSets. |
| 6819 | 5959 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5960 |
|
20504
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
5961 redirty_logged_cards(); |
| 342 | 5962 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5963 } | |
| 5964 | |
| 2152 | 5965 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5966 FreeRegionList* free_list, | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5967 bool par, |
|
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5968 bool locked) { |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
5969 assert(!hr->is_free(), "the region should not be free"); |
| 2152 | 5970 assert(!hr->is_empty(), "the region should not be empty"); |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
5971 assert(_hrm.is_available(hr->hrm_index()), "region should be committed"); |
| 2152 | 5972 assert(free_list != NULL, "pre-condition"); |
| 5973 | |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5974 if (G1VerifyBitmaps) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5975 MemRegion mr(hr->bottom(), hr->end()); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5976 concurrent_mark()->clearRangePrevBitmap(mr); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5977 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5978 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5979 // 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
|
5980 // 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
|
5981 // (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
|
5982 if (!hr->is_young()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5983 _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
|
5984 } |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5985 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
|
5986 free_list->add_ordered(hr); |
| 2152 | 5987 } |
| 5988 | |
| 5989 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5990 FreeRegionList* free_list, | |
| 5991 bool par) { | |
| 5992 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 5993 assert(free_list != NULL, "pre-condition"); | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5994 |
| 2152 | 5995 size_t hr_capacity = hr->capacity(); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5996 // 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
|
5997 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5998 uint last_index = hr->last_hc_index(); |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
5999 hr->clear_humongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6000 free_region(hr, free_list, par); |
| 2152 | 6001 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6002 uint i = hr->hrm_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6003 while (i < last_index) { |
| 3766 | 6004 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6005 assert(curr_hr->continuesHumongous(), "invariant"); |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6006 curr_hr->clear_humongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6007 free_region(curr_hr, free_list, par); |
| 2152 | 6008 i += 1; |
| 6009 } | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6010 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6011 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6012 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6013 const HeapRegionSetCount& humongous_regions_removed) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6014 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6015 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6016 _old_set.bulk_remove(old_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6017 _humongous_set.bulk_remove(humongous_regions_removed); |
|
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 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6020 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6021 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6022 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6023 assert(list != NULL, "list can't be null"); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6024 if (!list->is_empty()) { |
| 2152 | 6025 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6026 _hrm.insert_list_into_free_list(list); |
|
17736
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 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6030 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6031 _allocator->decrease_used(bytes); |
| 342 | 6032 } |
| 6033 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6034 class G1ParCleanupCTTask : public AbstractGangTask { |
| 12343 | 6035 G1SATBCardTableModRefBS* _ct_bs; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6036 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6037 HeapRegion* volatile _su_head; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6038 public: |
| 12343 | 6039 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6040 G1CollectedHeap* g1h) : |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6041 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
|
6042 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6043 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6044 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6045 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6046 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6047 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6048 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6049 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6050 |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6051 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
|
6052 // 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
|
6053 if (!r->is_survivor()) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6054 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6055 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6056 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6057 }; |
|
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 #ifndef PRODUCT |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6060 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
|
6061 G1CollectedHeap* _g1h; |
| 12343 | 6062 G1SATBCardTableModRefBS* _ct_bs; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6063 public: |
| 12343 | 6064 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
|
6065 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6066 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
|
6067 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
|
6068 _g1h->verify_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6069 } else { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6070 _g1h->verify_not_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6071 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6072 return false; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6073 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6074 }; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6075 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6076 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
|
6077 // All of the region should be clean. |
| 12343 | 6078 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
|
6079 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
|
6080 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
|
6081 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6082 |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6083 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
|
6084 // 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
|
6085 // 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
|
6086 // 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
|
6087 // 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
|
6088 // 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
|
6089 // 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
|
6090 // is dirty. |
| 12343 | 6091 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
|
6092 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
|
6093 if (hr->is_young()) { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6094 ct_bs->verify_g1_young_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6095 } else { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6096 ct_bs->verify_dirty_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6097 } |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6098 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6099 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6100 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
| 12343 | 6101 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6102 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
|
6103 verify_dirty_region(hr); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6104 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6105 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6106 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6107 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6108 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6109 } |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6110 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6111 bool G1CollectedHeap::verify_no_bits_over_tams(const char* bitmap_name, CMBitMapRO* bitmap, |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6112 HeapWord* tams, HeapWord* end) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6113 guarantee(tams <= end, |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6114 err_msg("tams: "PTR_FORMAT" end: "PTR_FORMAT, tams, end)); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6115 HeapWord* result = bitmap->getNextMarkedWordAddress(tams, end); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6116 if (result < end) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6117 gclog_or_tty->cr(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6118 gclog_or_tty->print_cr("## wrong marked address on %s bitmap: "PTR_FORMAT, |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6119 bitmap_name, result); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6120 gclog_or_tty->print_cr("## %s tams: "PTR_FORMAT" end: "PTR_FORMAT, |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6121 bitmap_name, tams, end); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6122 return false; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6123 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6124 return true; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6125 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6126 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6127 bool G1CollectedHeap::verify_bitmaps(const char* caller, HeapRegion* hr) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6128 CMBitMapRO* prev_bitmap = concurrent_mark()->prevMarkBitMap(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6129 CMBitMapRO* next_bitmap = (CMBitMapRO*) concurrent_mark()->nextMarkBitMap(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6130 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6131 HeapWord* bottom = hr->bottom(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6132 HeapWord* ptams = hr->prev_top_at_mark_start(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6133 HeapWord* ntams = hr->next_top_at_mark_start(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6134 HeapWord* end = hr->end(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6135 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6136 bool res_p = verify_no_bits_over_tams("prev", prev_bitmap, ptams, end); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6137 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6138 bool res_n = true; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6139 // We reset mark_in_progress() before we reset _cmThread->in_progress() and in this window |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6140 // we do the clearing of the next bitmap concurrently. Thus, we can not verify the bitmap |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6141 // if we happen to be in that state. |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6142 if (mark_in_progress() || !_cmThread->in_progress()) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6143 res_n = verify_no_bits_over_tams("next", next_bitmap, ntams, end); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6144 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6145 if (!res_p || !res_n) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6146 gclog_or_tty->print_cr("#### Bitmap verification failed for "HR_FORMAT, |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6147 HR_FORMAT_PARAMS(hr)); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6148 gclog_or_tty->print_cr("#### Caller: %s", caller); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6149 return false; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6150 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6151 return true; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6152 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6153 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6154 void G1CollectedHeap::check_bitmaps(const char* caller, HeapRegion* hr) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6155 if (!G1VerifyBitmaps) return; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6156 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6157 guarantee(verify_bitmaps(caller, hr), "bitmap verification"); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6158 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6159 |
|
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|
6160 class G1VerifyBitmapClosure : public HeapRegionClosure { |
|
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|
6161 private: |
|
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|
6162 const char* _caller; |
|
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|
6163 G1CollectedHeap* _g1h; |
|
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|
6164 bool _failures; |
|
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|
6165 |
|
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|
6166 public: |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6167 G1VerifyBitmapClosure(const char* caller, G1CollectedHeap* g1h) : |
|
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|
6168 _caller(caller), _g1h(g1h), _failures(false) { } |
|
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|
6169 |
|
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|
6170 bool failures() { return _failures; } |
|
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|
6171 |
|
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|
6172 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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|
6173 if (hr->continuesHumongous()) return false; |
|
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|
6174 |
|
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|
6175 bool result = _g1h->verify_bitmaps(_caller, hr); |
|
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|
6176 if (!result) { |
|
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|
6177 _failures = true; |
|
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|
6178 } |
|
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|
6179 return false; |
|
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|
6180 } |
|
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|
6181 }; |
|
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|
6182 |
|
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|
6183 void G1CollectedHeap::check_bitmaps(const char* caller) { |
|
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|
6184 if (!G1VerifyBitmaps) return; |
|
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|
6185 |
|
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|
6186 G1VerifyBitmapClosure cl(caller, this); |
|
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|
6187 heap_region_iterate(&cl); |
|
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|
6188 guarantee(!cl.failures(), "bitmap verification"); |
|
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|
6189 } |
|
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|
6190 #endif // PRODUCT |
|
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|
6191 |
| 342 | 6192 void G1CollectedHeap::cleanUpCardTable() { |
| 12343 | 6193 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 6194 double start = os::elapsedTime(); |
| 6195 | |
| 4023 | 6196 { |
| 6197 // Iterate over the dirty cards region list. | |
| 6198 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 6199 | |
| 4711 | 6200 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 6201 set_par_threads(); | |
| 4023 | 6202 workers()->run_task(&cleanup_task); |
| 6203 set_par_threads(0); | |
| 6204 } else { | |
| 6205 while (_dirty_cards_region_list) { | |
| 6206 HeapRegion* r = _dirty_cards_region_list; | |
| 6207 cleanup_task.clear_cards(r); | |
| 6208 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 6209 if (_dirty_cards_region_list == r) { | |
| 6210 // The last region. | |
| 6211 _dirty_cards_region_list = NULL; | |
| 6212 } | |
| 6213 r->set_next_dirty_cards_region(NULL); | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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diff
changeset
|
6214 } |
|
29e7d79232b9
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apetrusenko
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diff
changeset
|
6215 } |
| 4023 | 6216 #ifndef PRODUCT |
| 6217 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 6218 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 6219 heap_region_iterate(&cleanup_verifier); | |
| 6220 } | |
| 6221 #endif | |
|
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|
6222 } |
|
1394
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|
6223 |
| 342 | 6224 double elapsed = os::elapsedTime() - start; |
|
6219
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7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
6225 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 6226 } |
| 6227 | |
| 10405 | 6228 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
| 2152 | 6229 size_t pre_used = 0; |
| 6230 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 6231 | |
| 342 | 6232 double young_time_ms = 0.0; |
| 6233 double non_young_time_ms = 0.0; | |
| 6234 | |
|
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|
6235 // Since the collection set is a superset of the the young list, |
|
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|
6236 // all we need to do to clear the young list is clear its |
|
1316cec51b4d
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diff
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|
6237 // head and length, and unlink any young regions in the code below |
|
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|
6238 _young_list->clear(); |
|
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diff
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|
6239 |
| 342 | 6240 G1CollectorPolicy* policy = g1_policy(); |
| 6241 | |
| 6242 double start_sec = os::elapsedTime(); | |
| 6243 bool non_young = true; | |
| 6244 | |
| 6245 HeapRegion* cur = cs_head; | |
| 6246 int age_bound = -1; | |
| 6247 size_t rs_lengths = 0; | |
| 6248 | |
| 6249 while (cur != NULL) { | |
| 2361 | 6250 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 6251 if (non_young) { |
| 6252 if (cur->is_young()) { | |
| 6253 double end_sec = os::elapsedTime(); | |
| 6254 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 6255 non_young_time_ms += elapsed_ms; | |
| 6256 | |
| 6257 start_sec = os::elapsedTime(); | |
| 6258 non_young = false; | |
| 6259 } | |
| 6260 } else { | |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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diff
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|
6261 if (!cur->is_young()) { |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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|
6262 double end_sec = os::elapsedTime(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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diff
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|
6263 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
6264 young_time_ms += elapsed_ms; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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changeset
|
6265 |
|
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changeset
|
6266 start_sec = os::elapsedTime(); |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
6267 non_young = true; |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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diff
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|
6268 } |
| 342 | 6269 } |
| 6270 | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
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17753
diff
changeset
|
6271 rs_lengths += cur->rem_set()->occupied_locked(); |
| 342 | 6272 |
| 6273 HeapRegion* next = cur->next_in_collection_set(); | |
| 6274 assert(cur->in_collection_set(), "bad CS"); | |
| 6275 cur->set_next_in_collection_set(NULL); | |
| 6276 cur->set_in_collection_set(false); | |
| 6277 | |
| 6278 if (cur->is_young()) { | |
| 6279 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4073
diff
changeset
|
6280 assert(index != -1, "invariant"); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6281 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 6282 size_t words_survived = _surviving_young_words[index]; |
| 6283 cur->record_surv_words_in_group(words_survived); | |
|
1394
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1391
diff
changeset
|
6284 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6285 // 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
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1391
diff
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|
6286 // (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
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1391
diff
changeset
|
6287 // young list (linked via next_young_region()). Clear the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6288 // _next_young_region field. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6289 cur->set_next_young_region(NULL); |
| 342 | 6290 } else { |
| 6291 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
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tonyp
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4073
diff
changeset
|
6292 assert(index == -1, "invariant"); |
| 342 | 6293 } |
| 6294 | |
| 6295 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 6296 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 6297 "invariant" ); | |
| 6298 | |
| 6299 if (!cur->evacuation_failed()) { | |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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changeset
|
6300 MemRegion used_mr = cur->used_region(); |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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diff
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|
6301 |
| 342 | 6302 // And the region is empty. |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
6303 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6304 pre_used += cur->used(); |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
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17753
diff
changeset
|
6305 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
| 342 | 6306 } else { |
| 6307 cur->uninstall_surv_rate_group(); | |
|
4090
a88de71c4e3a
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diff
changeset
|
6308 if (cur->is_young()) { |
| 342 | 6309 cur->set_young_index_in_cset(-1); |
|
4090
a88de71c4e3a
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tonyp
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diff
changeset
|
6310 } |
| 342 | 6311 cur->set_evacuation_failed(false); |
| 4072 | 6312 // The region is now considered to be old. |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6313 cur->set_old(); |
| 4072 | 6314 _old_set.add(cur); |
| 10405 | 6315 evacuation_info.increment_collectionset_used_after(cur->used()); |
| 342 | 6316 } |
| 6317 cur = next; | |
| 6318 } | |
| 6319 | |
| 10405 | 6320 evacuation_info.set_regions_freed(local_free_list.length()); |
| 342 | 6321 policy->record_max_rs_lengths(rs_lengths); |
| 6322 policy->cset_regions_freed(); | |
| 6323 | |
| 6324 double end_sec = os::elapsedTime(); | |
| 6325 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
6326 |
|
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johnc
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4095
diff
changeset
|
6327 if (non_young) { |
| 342 | 6328 non_young_time_ms += elapsed_ms; |
|
4097
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4095
diff
changeset
|
6329 } else { |
| 342 | 6330 young_time_ms += elapsed_ms; |
|
4097
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4095
diff
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|
6331 } |
| 342 | 6332 |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6333 prepend_to_freelist(&local_free_list); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6334 decrement_summary_bytes(pre_used); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
6335 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
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6188
diff
changeset
|
6336 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6337 } |
| 6338 | |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6339 class G1FreeHumongousRegionClosure : public HeapRegionClosure { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6340 private: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6341 FreeRegionList* _free_region_list; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6342 HeapRegionSet* _proxy_set; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6343 HeapRegionSetCount _humongous_regions_removed; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6344 size_t _freed_bytes; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6345 public: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6346 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6347 G1FreeHumongousRegionClosure(FreeRegionList* free_region_list) : |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6348 _free_region_list(free_region_list), _humongous_regions_removed(), _freed_bytes(0) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6349 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6350 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6351 virtual bool doHeapRegion(HeapRegion* r) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6352 if (!r->startsHumongous()) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6353 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6354 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6355 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6356 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6357 |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6358 oop obj = (oop)r->bottom(); |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6359 CMBitMap* next_bitmap = g1h->concurrent_mark()->nextMarkBitMap(); |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6360 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6361 // The following checks whether the humongous object is live are sufficient. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6362 // The main additional check (in addition to having a reference from the roots |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6363 // or the young gen) is whether the humongous object has a remembered set entry. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6364 // |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6365 // A humongous object cannot be live if there is no remembered set for it |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6366 // because: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6367 // - there can be no references from within humongous starts regions referencing |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6368 // the object because we never allocate other objects into them. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6369 // (I.e. there are no intra-region references that may be missed by the |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6370 // remembered set) |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6371 // - as soon there is a remembered set entry to the humongous starts region |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6372 // (i.e. it has "escaped" to an old object) this remembered set entry will stay |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6373 // until the end of a concurrent mark. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6374 // |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6375 // It is not required to check whether the object has been found dead by marking |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6376 // or not, in fact it would prevent reclamation within a concurrent cycle, as |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6377 // all objects allocated during that time are considered live. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6378 // SATB marking is even more conservative than the remembered set. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6379 // So if at this point in the collection there is no remembered set entry, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6380 // nobody has a reference to it. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6381 // At the start of collection we flush all refinement logs, and remembered sets |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6382 // are completely up-to-date wrt to references to the humongous object. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6383 // |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6384 // Other implementation considerations: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6385 // - never consider object arrays: while they are a valid target, they have not |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6386 // been observed to be used as temporary objects. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6387 // - they would also pose considerable effort for cleaning up the the remembered |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6388 // sets. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6389 // While this cleanup is not strictly necessary to be done (or done instantly), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6390 // given that their occurrence is very low, this saves us this additional |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6391 // complexity. |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6392 uint region_idx = r->hrm_index(); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6393 if (g1h->humongous_is_live(region_idx) || |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6394 g1h->humongous_region_is_always_live(region_idx)) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6395 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6396 if (G1TraceReclaimDeadHumongousObjectsAtYoungGC) { |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6397 gclog_or_tty->print_cr("Live humongous %d region %d with remset "SIZE_FORMAT" code roots "SIZE_FORMAT" is marked %d live-other %d obj array %d", |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6398 r->isHumongous(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6399 region_idx, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6400 r->rem_set()->occupied(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6401 r->rem_set()->strong_code_roots_list_length(), |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6402 next_bitmap->isMarked(r->bottom()), |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6403 g1h->humongous_is_live(region_idx), |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6404 obj->is_objArray() |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6405 ); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6406 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6407 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6408 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6409 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6410 |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6411 guarantee(!obj->is_objArray(), |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6412 err_msg("Eagerly reclaiming object arrays is not supported, but the object "PTR_FORMAT" is.", |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6413 r->bottom())); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6414 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6415 if (G1TraceReclaimDeadHumongousObjectsAtYoungGC) { |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6416 gclog_or_tty->print_cr("Reclaim humongous region %d start "PTR_FORMAT" region %d length "UINT32_FORMAT" with remset "SIZE_FORMAT" code roots "SIZE_FORMAT" is marked %d live-other %d obj array %d", |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6417 r->isHumongous(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6418 r->bottom(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6419 region_idx, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6420 r->region_num(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6421 r->rem_set()->occupied(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6422 r->rem_set()->strong_code_roots_list_length(), |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6423 next_bitmap->isMarked(r->bottom()), |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6424 g1h->humongous_is_live(region_idx), |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6425 obj->is_objArray() |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6426 ); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6427 } |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6428 // Need to clear mark bit of the humongous object if already set. |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6429 if (next_bitmap->isMarked(r->bottom())) { |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6430 next_bitmap->clear(r->bottom()); |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6431 } |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6432 _freed_bytes += r->used(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6433 r->set_containing_set(NULL); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6434 _humongous_regions_removed.increment(1u, r->capacity()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6435 g1h->free_humongous_region(r, _free_region_list, false); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6436 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6437 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6438 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6439 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6440 HeapRegionSetCount& humongous_free_count() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6441 return _humongous_regions_removed; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6442 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6443 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6444 size_t bytes_freed() const { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6445 return _freed_bytes; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6446 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6447 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6448 size_t humongous_reclaimed() const { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6449 return _humongous_regions_removed.length(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6450 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6451 }; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6452 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6453 void G1CollectedHeap::eagerly_reclaim_humongous_regions() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6454 assert_at_safepoint(true); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6455 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6456 if (!G1ReclaimDeadHumongousObjectsAtYoungGC || !_has_humongous_reclaim_candidates) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6457 g1_policy()->phase_times()->record_fast_reclaim_humongous_time_ms(0.0, 0); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6458 return; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6459 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6460 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6461 double start_time = os::elapsedTime(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6462 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6463 FreeRegionList local_cleanup_list("Local Humongous Cleanup List"); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6464 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6465 G1FreeHumongousRegionClosure cl(&local_cleanup_list); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6466 heap_region_iterate(&cl); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6467 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6468 HeapRegionSetCount empty_set; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6469 remove_from_old_sets(empty_set, cl.humongous_free_count()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6470 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6471 G1HRPrinter* hr_printer = _g1h->hr_printer(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6472 if (hr_printer->is_active()) { |
|
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8027959: Early reclamation of large objects in G1
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|
6473 FreeRegionListIterator iter(&local_cleanup_list); |
|
755930f931e3
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|
6474 while (iter.more_available()) { |
|
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8027959: Early reclamation of large objects in G1
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changeset
|
6475 HeapRegion* hr = iter.get_next(); |
|
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8027959: Early reclamation of large objects in G1
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|
6476 hr_printer->cleanup(hr); |
|
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8027959: Early reclamation of large objects in G1
tschatzl
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|
6477 } |
|
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changeset
|
6478 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
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changeset
|
6479 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
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diff
changeset
|
6480 prepend_to_freelist(&local_cleanup_list); |
|
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8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6481 decrement_summary_bytes(cl.bytes_freed()); |
|
755930f931e3
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|
6482 |
|
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tschatzl
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diff
changeset
|
6483 g1_policy()->phase_times()->record_fast_reclaim_humongous_time_ms((os::elapsedTime() - start_time) * 1000.0, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
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changeset
|
6484 cl.humongous_reclaimed()); |
|
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diff
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|
6485 } |
|
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|
6486 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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diff
changeset
|
6487 // 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
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diff
changeset
|
6488 // any policy statistics or update free lists; we are abandoning |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6489 // the current incremental collection set in preparation of a |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6490 // 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
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parents:
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diff
changeset
|
6491 // the incremental collection set again. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6492 // This is only called when we're doing a full collection |
|
1316cec51b4d
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diff
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|
6493 // and is immediately followed by the tearing down of the young list. |
|
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changeset
|
6494 |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6495 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
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diff
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|
6496 HeapRegion* cur = cs_head; |
|
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|
6497 |
|
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diff
changeset
|
6498 while (cur != NULL) { |
|
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diff
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|
6499 HeapRegion* next = cur->next_in_collection_set(); |
|
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|
6500 assert(cur->in_collection_set(), "bad CS"); |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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changeset
|
6501 cur->set_next_in_collection_set(NULL); |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6502 cur->set_in_collection_set(false); |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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changeset
|
6503 cur->set_young_index_in_cset(-1); |
|
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diff
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|
6504 cur = next; |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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changeset
|
6505 } |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
changeset
|
6506 } |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6507 |
| 2152 | 6508 void G1CollectedHeap::set_free_regions_coming() { |
| 6509 if (G1ConcRegionFreeingVerbose) { | |
| 6510 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6511 "setting free regions coming"); | |
| 6512 } | |
| 6513 | |
| 6514 assert(!free_regions_coming(), "pre-condition"); | |
| 6515 _free_regions_coming = true; | |
| 342 | 6516 } |
| 6517 | |
| 2152 | 6518 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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4836
diff
changeset
|
6519 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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4836
diff
changeset
|
6520 |
| 2152 | 6521 { |
| 6522 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6523 _free_regions_coming = false; | |
| 6524 SecondaryFreeList_lock->notify_all(); | |
| 6525 } | |
| 6526 | |
| 6527 if (G1ConcRegionFreeingVerbose) { | |
| 6528 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6529 "reset free regions coming"); | |
| 342 | 6530 } |
| 6531 } | |
| 6532 | |
| 2152 | 6533 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6534 // Most of the time we won't have to wait, so let's do a quick test | |
| 6535 // first before we take the lock. | |
| 6536 if (!free_regions_coming()) { | |
| 6537 return; | |
| 6538 } | |
| 6539 | |
| 6540 if (G1ConcRegionFreeingVerbose) { | |
| 6541 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6542 "waiting for free regions"); | |
| 342 | 6543 } |
| 6544 | |
| 6545 { | |
| 2152 | 6546 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6547 while (free_regions_coming()) { | |
| 6548 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6549 } |
| 2152 | 6550 } |
| 6551 | |
| 6552 if (G1ConcRegionFreeingVerbose) { | |
| 6553 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6554 "done waiting for free regions"); | |
| 6555 } | |
| 342 | 6556 } |
| 6557 | |
| 6558 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6559 assert(heap_lock_held_for_gc(), | |
| 6560 "the heap lock should already be held by or for this thread"); | |
| 6561 _young_list->push_region(hr); | |
| 6562 } | |
| 6563 | |
| 6564 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6565 private: | |
| 6566 bool _success; | |
| 6567 public: | |
| 6568 NoYoungRegionsClosure() : _success(true) { } | |
| 6569 bool doHeapRegion(HeapRegion* r) { | |
| 6570 if (r->is_young()) { | |
| 6571 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6572 r->bottom(), r->end()); | |
| 6573 _success = false; | |
| 6574 } | |
| 6575 return false; | |
| 6576 } | |
| 6577 bool success() { return _success; } | |
| 6578 }; | |
| 6579 | |
|
1394
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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diff
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|
6580 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6581 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
|
6582 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6583 if (check_heap) { |
| 342 | 6584 NoYoungRegionsClosure closure; |
| 6585 heap_region_iterate(&closure); | |
| 6586 ret = ret && closure.success(); | |
| 6587 } | |
| 6588 | |
| 6589 return ret; | |
| 6590 } | |
| 6591 | |
| 4072 | 6592 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6593 private: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6594 HeapRegionSet *_old_set; |
| 2152 | 6595 |
| 342 | 6596 public: |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6597 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6598 |
| 342 | 6599 bool doHeapRegion(HeapRegion* r) { |
|
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c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
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diff
changeset
|
6600 if (r->is_old()) { |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6601 _old_set->remove(r); |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6602 } else { |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6603 // We ignore free regions, we'll empty the free list afterwards. |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6604 // We ignore young regions, we'll empty the young list afterwards. |
| 4072 | 6605 // We ignore humongous regions, we're not tearing down the |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6606 // humongous regions set. |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6607 assert(r->is_free() || r->is_young() || r->isHumongous(), |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6608 "it cannot be another type"); |
| 342 | 6609 } |
| 6610 return false; | |
| 6611 } | |
| 6612 | |
| 4072 | 6613 ~TearDownRegionSetsClosure() { |
| 6614 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6615 } |
| 342 | 6616 }; |
| 6617 | |
| 4072 | 6618 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6619 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6620 | |
| 6621 if (!free_list_only) { | |
| 6622 TearDownRegionSetsClosure cl(&_old_set); | |
| 6623 heap_region_iterate(&cl); | |
| 6624 | |
| 17764 | 6625 // Note that emptying the _young_list is postponed and instead done as |
| 6626 // the first step when rebuilding the regions sets again. The reason for | |
| 6627 // this is that during a full GC string deduplication needs to know if | |
| 6628 // a collected region was young or old when the full GC was initiated. | |
| 4072 | 6629 } |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6630 _hrm.remove_all_free_regions(); |
| 4072 | 6631 } |
| 6632 | |
| 6633 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6634 private: | |
| 6635 bool _free_list_only; | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6636 HeapRegionSet* _old_set; |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6637 HeapRegionManager* _hrm; |
| 4072 | 6638 size_t _total_used; |
| 6639 | |
| 6640 public: | |
| 6641 RebuildRegionSetsClosure(bool free_list_only, | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6642 HeapRegionSet* old_set, HeapRegionManager* hrm) : |
| 4072 | 6643 _free_list_only(free_list_only), |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6644 _old_set(old_set), _hrm(hrm), _total_used(0) { |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6645 assert(_hrm->num_free_regions() == 0, "pre-condition"); |
| 4072 | 6646 if (!free_list_only) { |
| 6647 assert(_old_set->is_empty(), "pre-condition"); | |
| 6648 } | |
| 6649 } | |
| 6650 | |
| 6651 bool doHeapRegion(HeapRegion* r) { | |
| 6652 if (r->continuesHumongous()) { | |
| 6653 return false; | |
| 6654 } | |
| 6655 | |
| 6656 if (r->is_empty()) { | |
| 6657 // Add free regions to the free list | |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6658 r->set_free(); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6659 r->set_allocation_context(AllocationContext::system()); |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6660 _hrm->insert_into_free_list(r); |
| 4072 | 6661 } else if (!_free_list_only) { |
| 6662 assert(!r->is_young(), "we should not come across young regions"); | |
| 6663 | |
| 6664 if (r->isHumongous()) { | |
| 6665 // We ignore humongous regions, we left the humongous set unchanged | |
| 6666 } else { | |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
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20445
diff
changeset
|
6667 // Objects that were compacted would have ended up on regions |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
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20445
diff
changeset
|
6668 // that were previously old or free. |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6669 assert(r->is_free() || r->is_old(), "invariant"); |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6670 // We now consider them old, so register as such. |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6671 r->set_old(); |
| 4072 | 6672 _old_set->add(r); |
| 6673 } | |
| 6674 _total_used += r->used(); | |
| 6675 } | |
| 6676 | |
| 6677 return false; | |
| 6678 } | |
| 6679 | |
| 6680 size_t total_used() { | |
| 6681 return _total_used; | |
| 6682 } | |
| 6683 }; | |
| 6684 | |
| 6685 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6686 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6687 | |
| 17764 | 6688 if (!free_list_only) { |
| 6689 _young_list->empty_list(); | |
| 6690 } | |
| 6691 | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6692 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_hrm); |
| 4072 | 6693 heap_region_iterate(&cl); |
| 6694 | |
| 6695 if (!free_list_only) { | |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6696 _allocator->set_used(cl.total_used()); |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6697 } |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6698 assert(_allocator->used_unlocked() == recalculate_used(), |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6699 err_msg("inconsistent _allocator->used_unlocked(), " |
| 4072 | 6700 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6701 _allocator->used_unlocked(), recalculate_used())); |
| 342 | 6702 } |
| 6703 | |
| 6704 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6705 _refine_cte_cl->set_concurrent(concurrent); | |
| 6706 } | |
| 6707 | |
| 6708 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6709 HeapRegion* hr = heap_region_containing(p); | |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
6710 return hr->is_in(p); |
| 342 | 6711 } |
| 2152 | 6712 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6713 // 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
|
6714 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6715 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
|
6716 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6717 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
|
6718 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6719 "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
|
6720 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
|
6721 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6722 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
|
6723 false /* is_old */, |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6724 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6725 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6726 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6727 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6728 check_bitmaps("Mutator Region Allocation", new_alloc_region); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6729 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6730 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6731 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6732 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6733 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6734 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6735 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
|
6736 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6737 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6738 assert(alloc_region->is_eden(), "all mutator alloc regions should be eden"); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6739 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6740 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6741 _allocator->increase_used(allocated_bytes); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6742 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6743 // 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
|
6744 // 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
|
6745 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6746 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6747 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6748 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6749 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6750 // 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
|
6751 // in the workgroup. |
| 4711 | 6752 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
|
6753 uint n_workers = workers()->active_workers(); |
| 4711 | 6754 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6755 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6756 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6757 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6758 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
|
6759 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6760 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6761 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6762 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6763 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6764 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6765 // 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
|
6766 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6767 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
|
6768 uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6769 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6770 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
|
6771 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6772 if (count < g1_policy()->max_regions(ap)) { |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6773 bool survivor = (ap == GCAllocForSurvived); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6774 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
|
6775 !survivor, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6776 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6777 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6778 // We really only need to do this for old regions given that we |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6779 // should never scan survivors. But it doesn't hurt to do it |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6780 // for survivors too. |
|
20274
a8137787acfe
8047821: G1 Does not use the save_marks functionality as intended
mgerdin
parents:
20270
diff
changeset
|
6781 new_alloc_region->record_top_and_timestamp(); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6782 if (survivor) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6783 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6784 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6785 check_bitmaps("Survivor Region Allocation", new_alloc_region); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6786 } else { |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6787 new_alloc_region->set_old(); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6788 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6789 check_bitmaps("Old Region Allocation", new_alloc_region); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6790 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6791 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
|
6792 new_alloc_region->note_start_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6793 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6794 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6795 g1_policy()->note_alloc_region_limit_reached(ap); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6796 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6797 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6798 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6799 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6800 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6801 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6802 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6803 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6804 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
|
6805 alloc_region->note_end_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6806 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6807 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6808 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6809 } else { |
| 6810 _old_set.add(alloc_region); | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6811 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6812 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6813 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6814 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6815 // Heap region set verification |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6816 |
| 2152 | 6817 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6818 private: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6819 HeapRegionSet* _old_set; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6820 HeapRegionSet* _humongous_set; |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6821 HeapRegionManager* _hrm; |
| 2152 | 6822 |
| 6823 public: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6824 HeapRegionSetCount _old_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6825 HeapRegionSetCount _humongous_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6826 HeapRegionSetCount _free_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6827 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6828 VerifyRegionListsClosure(HeapRegionSet* old_set, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6829 HeapRegionSet* humongous_set, |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6830 HeapRegionManager* hrm) : |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6831 _old_set(old_set), _humongous_set(humongous_set), _hrm(hrm), |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6832 _old_count(), _humongous_count(), _free_count(){ } |
| 2152 | 6833 |
| 6834 bool doHeapRegion(HeapRegion* hr) { | |
| 6835 if (hr->continuesHumongous()) { | |
| 6836 return false; | |
| 6837 } | |
| 6838 | |
| 6839 if (hr->is_young()) { | |
| 6840 // TODO | |
| 6841 } else if (hr->startsHumongous()) { | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6842 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->hrm_index())); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6843 _humongous_count.increment(1u, hr->capacity()); |
| 2152 | 6844 } else if (hr->is_empty()) { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6845 assert(_hrm->is_free(hr), err_msg("Heap region %u is empty but not on the free list.", hr->hrm_index())); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6846 _free_count.increment(1u, hr->capacity()); |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
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|
6847 } else if (hr->is_old()) { |
|
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|
6848 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->hrm_index())); |
|
17736
58fc1b1523dc
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diff
changeset
|
6849 _old_count.increment(1u, hr->capacity()); |
|
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|
6850 } else { |
|
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|
6851 ShouldNotReachHere(); |
| 2152 | 6852 } |
| 6853 return false; | |
| 6854 } | |
|
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|
6855 |
|
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a8ea2f110d87
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|
6856 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, HeapRegionManager* free_list) { |
|
17736
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changeset
|
6857 guarantee(old_set->length() == _old_count.length(), err_msg("Old set count mismatch. Expected %u, actual %u.", old_set->length(), _old_count.length())); |
|
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diff
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|
6858 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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diff
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|
6859 old_set->total_capacity_bytes(), _old_count.capacity())); |
|
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changeset
|
6860 |
|
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8034079: G1: Refactor the HeapRegionSet hierarchy
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changeset
|
6861 guarantee(humongous_set->length() == _humongous_count.length(), err_msg("Hum set count mismatch. Expected %u, actual %u.", humongous_set->length(), _humongous_count.length())); |
|
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|
6862 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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changeset
|
6863 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
|
58fc1b1523dc
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brutisso
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diff
changeset
|
6864 |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
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20335
diff
changeset
|
6865 guarantee(free_list->num_free_regions() == _free_count.length(), err_msg("Free list count mismatch. Expected %u, actual %u.", free_list->num_free_regions(), _free_count.length())); |
|
17736
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diff
changeset
|
6866 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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|
6867 free_list->total_capacity_bytes(), _free_count.capacity())); |
|
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|
6868 } |
| 2152 | 6869 }; |
| 6870 | |
| 6871 void G1CollectedHeap::verify_region_sets() { | |
| 6872 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6873 | |
| 6874 // First, check the explicit lists. | |
|
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a8ea2f110d87
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changeset
|
6875 _hrm.verify(); |
| 2152 | 6876 { |
| 6877 // Given that a concurrent operation might be adding regions to | |
| 6878 // the secondary free list we have to take the lock before | |
| 6879 // verifying it. | |
| 6880 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
17736
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|
6881 _secondary_free_list.verify_list(); |
|
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|
6882 } |
| 2152 | 6883 |
| 6884 // If a concurrent region freeing operation is in progress it will | |
| 6885 // be difficult to correctly attributed any free regions we come | |
| 6886 // across to the correct free list given that they might belong to | |
| 6887 // one of several (free_list, secondary_free_list, any local lists, | |
| 6888 // etc.). So, if that's the case we will skip the rest of the | |
| 6889 // verification operation. Alternatively, waiting for the concurrent | |
| 6890 // operation to complete will have a non-trivial effect on the GC's | |
| 6891 // operation (no concurrent operation will last longer than the | |
| 6892 // interval between two calls to verification) and it might hide | |
| 6893 // any issues that we would like to catch during testing. | |
| 6894 if (free_regions_coming()) { | |
| 6895 return; | |
| 6896 } | |
| 6897 | |
| 2361 | 6898 // Make sure we append the secondary_free_list on the free_list so |
| 6899 // that all free regions we will come across can be safely | |
| 6900 // attributed to the free_list. | |
| 6901 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6902 |
| 6903 // Finally, make sure that the region accounting in the lists is | |
| 6904 // consistent with what we see in the heap. | |
| 6905 | |
|
20377
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diff
changeset
|
6906 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_hrm); |
| 2152 | 6907 heap_region_iterate(&cl); |
|
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|
6908 cl.verify_counts(&_old_set, &_humongous_set, &_hrm); |
| 342 | 6909 } |
| 12080 | 6910 |
| 6911 // Optimized nmethod scanning | |
| 6912 | |
| 6913 class RegisterNMethodOopClosure: public OopClosure { | |
| 6914 G1CollectedHeap* _g1h; | |
| 6915 nmethod* _nm; | |
| 6916 | |
| 6917 template <class T> void do_oop_work(T* p) { | |
| 6918 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6919 if (!oopDesc::is_null(heap_oop)) { | |
| 6920 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6921 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
13062
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
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diff
changeset
|
6922 assert(!hr->continuesHumongous(), |
|
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
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diff
changeset
|
6923 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
28674af341ac
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tschatzl
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diff
changeset
|
6924 " starting at "HR_FORMAT, |
|
28674af341ac
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diff
changeset
|
6925 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
| 12080 | 6926 |
| 20494 | 6927 // HeapRegion::add_strong_code_root_locked() avoids adding duplicate entries. |
| 6928 hr->add_strong_code_root_locked(_nm); | |
| 12080 | 6929 } |
| 6930 } | |
| 6931 | |
| 6932 public: | |
| 6933 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6934 _g1h(g1h), _nm(nm) {} | |
| 6935 | |
| 6936 void do_oop(oop* p) { do_oop_work(p); } | |
| 6937 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6938 }; | |
| 6939 | |
| 6940 class UnregisterNMethodOopClosure: public OopClosure { | |
| 6941 G1CollectedHeap* _g1h; | |
| 6942 nmethod* _nm; | |
| 6943 | |
| 6944 template <class T> void do_oop_work(T* p) { | |
| 6945 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6946 if (!oopDesc::is_null(heap_oop)) { | |
| 6947 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6948 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
13062
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
tschatzl
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diff
changeset
|
6949 assert(!hr->continuesHumongous(), |
|
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
tschatzl
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13060
diff
changeset
|
6950 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
28674af341ac
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tschatzl
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diff
changeset
|
6951 " starting at "HR_FORMAT, |
|
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
tschatzl
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13060
diff
changeset
|
6952 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
|
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tschatzl
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diff
changeset
|
6953 |
| 12080 | 6954 hr->remove_strong_code_root(_nm); |
| 6955 } | |
| 6956 } | |
| 6957 | |
| 6958 public: | |
| 6959 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6960 _g1h(g1h), _nm(nm) {} | |
| 6961 | |
| 6962 void do_oop(oop* p) { do_oop_work(p); } | |
| 6963 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6964 }; | |
| 6965 | |
| 6966 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
| 6967 CollectedHeap::register_nmethod(nm); | |
| 6968 | |
| 6969 guarantee(nm != NULL, "sanity"); | |
| 6970 RegisterNMethodOopClosure reg_cl(this, nm); | |
| 6971 nm->oops_do(®_cl); | |
| 6972 } | |
| 6973 | |
| 6974 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
| 6975 CollectedHeap::unregister_nmethod(nm); | |
| 6976 | |
| 6977 guarantee(nm != NULL, "sanity"); | |
| 6978 UnregisterNMethodOopClosure reg_cl(this, nm); | |
| 6979 nm->oops_do(®_cl, true); | |
| 6980 } | |
| 6981 | |
|
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
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17749
diff
changeset
|
6982 void G1CollectedHeap::purge_code_root_memory() { |
|
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
6983 double purge_start = os::elapsedTime(); |
| 20494 | 6984 G1CodeRootSet::purge(); |
|
17753
191174b49bec
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tschatzl
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17749
diff
changeset
|
6985 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
|
191174b49bec
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17749
diff
changeset
|
6986 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
|
191174b49bec
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tschatzl
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17749
diff
changeset
|
6987 } |
|
191174b49bec
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tschatzl
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17749
diff
changeset
|
6988 |
| 12080 | 6989 class RebuildStrongCodeRootClosure: public CodeBlobClosure { |
| 6990 G1CollectedHeap* _g1h; | |
| 6991 | |
| 6992 public: | |
| 6993 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
| 6994 _g1h(g1h) {} | |
| 6995 | |
| 6996 void do_code_blob(CodeBlob* cb) { | |
| 6997 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
| 6998 if (nm == NULL) { | |
| 6999 return; | |
| 7000 } | |
| 7001 | |
|
20191
fd81a5764900
8046231: G1: Code root location ... from nmethod ... not in strong code roots for region
pliden
parents:
20190
diff
changeset
|
7002 if (ScavengeRootsInCode) { |
| 12080 | 7003 _g1h->register_nmethod(nm); |
| 7004 } | |
| 7005 } | |
| 7006 }; | |
| 7007 | |
| 7008 void G1CollectedHeap::rebuild_strong_code_roots() { | |
| 7009 RebuildStrongCodeRootClosure blob_cl(this); | |
| 7010 CodeCache::blobs_do(&blob_cl); | |
| 7011 } |