Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20543:e7d0505c8a30
8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso
| author | tschatzl |
|---|---|
| date | Fri, 10 Oct 2014 15:51:58 +0200 |
| parents | d3fd73295885 |
| children | 1d6eb209432a c2844108a708 |
| 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 | |
| 20543 | 388 void G1RegionMappingChangedListener::on_commit(uint start_idx, size_t num_regions, bool zero_filled) { |
| 389 // The from card cache is not the memory that is actually committed. So we cannot | |
| 390 // take advantage of the zero_filled parameter. | |
| 20337 | 391 reset_from_card_cache(start_idx, num_regions); |
| 392 } | |
| 393 | |
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394 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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395 { |
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396 // Claim the right to put the region on the dirty cards region list |
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397 // by installing a self pointer. |
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398 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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399 if (next == NULL) { |
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400 HeapRegion* res = (HeapRegion*) |
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401 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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402 NULL); |
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403 if (res == NULL) { |
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404 HeapRegion* head; |
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405 do { |
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406 // Put the region to the dirty cards region list. |
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407 head = _dirty_cards_region_list; |
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408 next = (HeapRegion*) |
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409 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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410 if (next == head) { |
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411 assert(hr->get_next_dirty_cards_region() == hr, |
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412 "hr->get_next_dirty_cards_region() != hr"); |
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413 if (next == NULL) { |
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414 // The last region in the list points to itself. |
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415 hr->set_next_dirty_cards_region(hr); |
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416 } else { |
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417 hr->set_next_dirty_cards_region(next); |
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418 } |
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419 } |
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420 } while (next != head); |
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421 } |
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422 } |
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423 } |
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424 |
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425 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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426 { |
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427 HeapRegion* head; |
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428 HeapRegion* hr; |
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429 do { |
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430 head = _dirty_cards_region_list; |
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431 if (head == NULL) { |
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432 return NULL; |
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433 } |
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434 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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435 if (head == new_head) { |
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436 // The last region. |
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437 new_head = NULL; |
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438 } |
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439 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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440 head); |
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441 } while (hr != head); |
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442 assert(hr != NULL, "invariant"); |
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443 hr->set_next_dirty_cards_region(NULL); |
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444 return hr; |
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445 } |
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446 |
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447 #ifdef ASSERT |
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448 // A region is added to the collection set as it is retired |
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449 // so an address p can point to a region which will be in the |
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450 // collection set but has not yet been retired. This method |
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451 // therefore is only accurate during a GC pause after all |
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452 // regions have been retired. It is used for debugging |
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453 // to check if an nmethod has references to objects that can |
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454 // be move during a partial collection. Though it can be |
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455 // inaccurate, it is sufficient for G1 because the conservative |
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456 // implementation of is_scavengable() for G1 will indicate that |
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457 // all nmethods must be scanned during a partial collection. |
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458 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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459 if (p == NULL) { |
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460 return false; |
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461 } |
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462 return heap_region_containing(p)->in_collection_set(); |
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463 } |
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464 #endif |
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465 |
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466 // Returns true if the reference points to an object that |
| 10405 | 467 // can move in an incremental collection. |
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468 bool G1CollectedHeap::is_scavengable(const void* p) { |
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469 HeapRegion* hr = heap_region_containing(p); |
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470 return !hr->isHumongous(); |
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471 } |
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472 |
| 342 | 473 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 474 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 12343 | 475 CardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 476 |
| 477 // Count the dirty cards at the start. | |
| 478 CountNonCleanMemRegionClosure count1(this); | |
| 479 ct_bs->mod_card_iterate(&count1); | |
| 480 int orig_count = count1.n(); | |
| 481 | |
| 482 // First clear the logged cards. | |
| 483 ClearLoggedCardTableEntryClosure clear; | |
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484 dcqs.apply_closure_to_all_completed_buffers(&clear); |
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485 dcqs.iterate_closure_all_threads(&clear, false); |
| 342 | 486 clear.print_histo(); |
| 487 | |
| 488 // Now ensure that there's no dirty cards. | |
| 489 CountNonCleanMemRegionClosure count2(this); | |
| 490 ct_bs->mod_card_iterate(&count2); | |
| 491 if (count2.n() != 0) { | |
| 492 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 493 count2.n(), orig_count); | |
| 494 } | |
| 495 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 496 | |
| 497 RedirtyLoggedCardTableEntryClosure redirty; | |
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498 dcqs.apply_closure_to_all_completed_buffers(&redirty); |
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499 dcqs.iterate_closure_all_threads(&redirty, false); |
| 342 | 500 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", |
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501 clear.num_processed(), orig_count); |
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502 guarantee(redirty.num_processed() == clear.num_processed(), |
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503 err_msg("Redirtied "SIZE_FORMAT" cards, bug cleared "SIZE_FORMAT, |
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504 redirty.num_processed(), clear.num_processed())); |
| 342 | 505 |
| 506 CountNonCleanMemRegionClosure count3(this); | |
| 507 ct_bs->mod_card_iterate(&count3); | |
| 508 if (count3.n() != orig_count) { | |
| 509 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 510 orig_count, count3.n()); | |
| 511 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 512 } | |
| 513 } | |
| 514 | |
| 515 // Private class members. | |
| 516 | |
| 517 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 518 | |
| 519 // Private methods. | |
| 520 | |
| 2152 | 521 HeapRegion* |
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522 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
| 2152 | 523 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 524 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 525 if (!_secondary_free_list.is_empty()) { | |
| 526 if (G1ConcRegionFreeingVerbose) { | |
| 527 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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528 "secondary_free_list has %u entries", |
| 2152 | 529 _secondary_free_list.length()); |
| 530 } | |
| 531 // It looks as if there are free regions available on the | |
| 532 // secondary_free_list. Let's move them to the free_list and try | |
| 533 // again to allocate from it. | |
| 534 append_secondary_free_list(); | |
| 535 | |
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536 assert(_hrm.num_free_regions() > 0, "if the secondary_free_list was not " |
| 2152 | 537 "empty we should have moved at least one entry to the free_list"); |
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538 HeapRegion* res = _hrm.allocate_free_region(is_old); |
| 2152 | 539 if (G1ConcRegionFreeingVerbose) { |
| 540 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 541 "allocated "HR_FORMAT" from secondary_free_list", | |
| 542 HR_FORMAT_PARAMS(res)); | |
| 543 } | |
| 544 return res; | |
| 545 } | |
| 546 | |
| 10405 | 547 // Wait here until we get notified either when (a) there are no |
| 2152 | 548 // more free regions coming or (b) some regions have been moved on |
| 549 // the secondary_free_list. | |
| 550 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 551 } | |
| 552 | |
| 553 if (G1ConcRegionFreeingVerbose) { | |
| 554 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 555 "could not allocate from secondary_free_list"); | |
| 556 } | |
| 557 return NULL; | |
| 558 } | |
| 559 | |
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560 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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561 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 562 "the only time we use this to allocate a humongous region is " |
| 563 "when we are allocating a single humongous region"); | |
| 564 | |
| 565 HeapRegion* res; | |
| 566 if (G1StressConcRegionFreeing) { | |
| 567 if (!_secondary_free_list.is_empty()) { | |
| 568 if (G1ConcRegionFreeingVerbose) { | |
| 569 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 570 "forced to look at the secondary_free_list"); | |
| 571 } | |
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572 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 573 if (res != NULL) { |
| 574 return res; | |
| 575 } | |
| 576 } | |
| 577 } | |
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578 |
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579 res = _hrm.allocate_free_region(is_old); |
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580 |
| 2152 | 581 if (res == NULL) { |
| 582 if (G1ConcRegionFreeingVerbose) { | |
| 583 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 584 "res == NULL, trying the secondary_free_list"); | |
| 585 } | |
|
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586 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 587 } |
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588 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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589 // Currently, only attempts to allocate GC alloc regions set |
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590 // do_expand to true. So, we should only reach here during a |
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591 // safepoint. If this assumption changes we might have to |
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592 // reconsider the use of _expand_heap_after_alloc_failure. |
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593 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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594 |
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595 ergo_verbose1(ErgoHeapSizing, |
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596 "attempt heap expansion", |
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597 ergo_format_reason("region allocation request failed") |
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598 ergo_format_byte("allocation request"), |
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599 word_size * HeapWordSize); |
|
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600 if (expand(word_size * HeapWordSize)) { |
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601 // Given that expand() succeeded in expanding the heap, and we |
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602 // always expand the heap by an amount aligned to the heap |
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603 // region size, the free list should in theory not be empty. |
|
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604 // In either case allocate_free_region() will check for NULL. |
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605 res = _hrm.allocate_free_region(is_old); |
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606 } else { |
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607 _expand_heap_after_alloc_failure = false; |
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608 } |
| 342 | 609 } |
| 610 return res; | |
| 611 } | |
| 612 | |
| 2361 | 613 HeapWord* |
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614 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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615 uint num_regions, |
|
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616 size_t word_size, |
|
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617 AllocationContext_t context) { |
|
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618 assert(first != G1_NO_HRM_INDEX, "pre-condition"); |
| 2361 | 619 assert(isHumongous(word_size), "word_size should be humongous"); |
| 620 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 621 | |
| 622 // Index of last region in the series + 1. | |
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623 uint last = first + num_regions; |
| 2361 | 624 |
| 625 // We need to initialize the region(s) we just discovered. This is | |
| 626 // a bit tricky given that it can happen concurrently with | |
| 627 // refinement threads refining cards on these regions and | |
| 628 // potentially wanting to refine the BOT as they are scanning | |
| 629 // those cards (this can happen shortly after a cleanup; see CR | |
| 630 // 6991377). So we have to set up the region(s) carefully and in | |
| 631 // a specific order. | |
| 632 | |
| 633 // The word size sum of all the regions we will allocate. | |
|
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634 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 635 assert(word_size <= word_size_sum, "sanity"); |
| 636 | |
| 637 // This will be the "starts humongous" region. | |
| 3766 | 638 HeapRegion* first_hr = region_at(first); |
| 2361 | 639 // The header of the new object will be placed at the bottom of |
| 640 // the first region. | |
| 641 HeapWord* new_obj = first_hr->bottom(); | |
| 642 // This will be the new end of the first region in the series that | |
| 10405 | 643 // should also match the end of the last region in the series. |
| 2361 | 644 HeapWord* new_end = new_obj + word_size_sum; |
| 645 // This will be the new top of the first region that will reflect | |
| 646 // this allocation. | |
| 647 HeapWord* new_top = new_obj + word_size; | |
| 648 | |
| 649 // First, we need to zero the header of the space that we will be | |
| 650 // allocating. When we update top further down, some refinement | |
| 651 // threads might try to scan the region. By zeroing the header we | |
| 652 // ensure that any thread that will try to scan the region will | |
| 653 // come across the zero klass word and bail out. | |
| 654 // | |
| 655 // NOTE: It would not have been correct to have used | |
| 656 // CollectedHeap::fill_with_object() and make the space look like | |
| 657 // an int array. The thread that is doing the allocation will | |
| 658 // later update the object header to a potentially different array | |
| 659 // type and, for a very short period of time, the klass and length | |
| 660 // fields will be inconsistent. This could cause a refinement | |
| 661 // thread to calculate the object size incorrectly. | |
| 662 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 663 | |
| 664 // We will set up the first region as "starts humongous". This | |
| 665 // will also update the BOT covering all the regions to reflect | |
| 666 // that there is a single object that starts at the bottom of the | |
| 667 // first region. | |
| 668 first_hr->set_startsHumongous(new_top, new_end); | |
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669 first_hr->set_allocation_context(context); |
| 2361 | 670 // Then, if there are any, we will set up the "continues |
| 671 // humongous" regions. | |
| 672 HeapRegion* hr = NULL; | |
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673 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 674 hr = region_at(i); |
| 2361 | 675 hr->set_continuesHumongous(first_hr); |
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676 hr->set_allocation_context(context); |
| 2361 | 677 } |
| 678 // If we have "continues humongous" regions (hr != NULL), then the | |
| 679 // end of the last one should match new_end. | |
| 680 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 681 | |
| 682 // Up to this point no concurrent thread would have been able to | |
| 683 // do any scanning on any region in this series. All the top | |
| 684 // fields still point to bottom, so the intersection between | |
| 685 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 686 // update the top fields, we'll do a storestore to make sure that | |
| 687 // no thread sees the update to top before the zeroing of the | |
| 688 // object header and the BOT initialization. | |
| 689 OrderAccess::storestore(); | |
| 690 | |
| 691 // Now that the BOT and the object header have been initialized, | |
| 692 // we can update top of the "starts humongous" region. | |
| 693 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 694 "new_top should be in this region"); | |
| 695 first_hr->set_top(new_top); | |
|
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696 if (_hr_printer.is_active()) { |
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697 HeapWord* bottom = first_hr->bottom(); |
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698 HeapWord* end = first_hr->orig_end(); |
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699 if ((first + 1) == last) { |
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700 // the series has a single humongous region |
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701 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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702 } else { |
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703 // the series has more than one humongous regions |
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704 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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705 } |
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706 } |
| 2361 | 707 |
| 708 // Now, we will update the top fields of the "continues humongous" | |
| 709 // regions. The reason we need to do this is that, otherwise, | |
| 710 // these regions would look empty and this will confuse parts of | |
| 711 // G1. For example, the code that looks for a consecutive number | |
| 712 // of empty regions will consider them empty and try to | |
| 713 // re-allocate them. We can extend is_empty() to also include | |
| 714 // !continuesHumongous(), but it is easier to just update the top | |
| 715 // fields here. The way we set top for all regions (i.e., top == | |
| 716 // end for all regions but the last one, top == new_top for the | |
| 717 // last one) is actually used when we will free up the humongous | |
| 718 // region in free_humongous_region(). | |
| 719 hr = NULL; | |
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720 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 721 hr = region_at(i); |
| 2361 | 722 if ((i + 1) == last) { |
| 723 // last continues humongous region | |
| 724 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 725 "new_top should fall on this region"); | |
| 726 hr->set_top(new_top); | |
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727 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 728 } else { |
| 729 // not last one | |
| 730 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 731 hr->set_top(hr->end()); | |
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732 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 733 } |
| 734 } | |
| 735 // If we have continues humongous regions (hr != NULL), then the | |
| 736 // end of the last one should match new_end and its top should | |
| 737 // match new_top. | |
| 738 assert(hr == NULL || | |
| 739 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
|
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740 check_bitmaps("Humongous Region Allocation", first_hr); |
| 2361 | 741 |
| 742 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
|
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743 _allocator->increase_used(first_hr->used()); |
| 2361 | 744 _humongous_set.add(first_hr); |
| 745 | |
| 746 return new_obj; | |
| 747 } | |
| 748 | |
| 342 | 749 // If could fit into free regions w/o expansion, try. |
| 750 // Otherwise, if can expand, do so. | |
| 751 // Otherwise, if using ex regions might help, try with ex given back. | |
|
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752 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size, AllocationContext_t context) { |
| 2152 | 753 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 754 | |
| 755 verify_region_sets_optional(); | |
| 342 | 756 |
|
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757 uint first = G1_NO_HRM_INDEX; |
|
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758 uint obj_regions = (uint)(align_size_up_(word_size, HeapRegion::GrainWords) / HeapRegion::GrainWords); |
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759 |
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760 if (obj_regions == 1) { |
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761 // Only one region to allocate, try to use a fast path by directly allocating |
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762 // from the free lists. Do not try to expand here, we will potentially do that |
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763 // later. |
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764 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
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765 if (hr != NULL) { |
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766 first = hr->hrm_index(); |
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767 } |
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768 } else { |
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769 // We can't allocate humongous regions spanning more than one region while |
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770 // cleanupComplete() is running, since some of the regions we find to be |
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771 // empty might not yet be added to the free list. It is not straightforward |
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772 // to know in which list they are on so that we can remove them. We only |
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773 // need to do this if we need to allocate more than one region to satisfy the |
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774 // current humongous allocation request. If we are only allocating one region |
| 20337 | 775 // we use the one-region region allocation code (see above), that already |
| 776 // potentially waits for regions from the secondary free list. | |
|
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777 wait_while_free_regions_coming(); |
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778 append_secondary_free_list_if_not_empty_with_lock(); |
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779 |
|
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780 // Policy: Try only empty regions (i.e. already committed first). Maybe we |
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781 // are lucky enough to find some. |
|
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782 first = _hrm.find_contiguous_only_empty(obj_regions); |
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783 if (first != G1_NO_HRM_INDEX) { |
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784 _hrm.allocate_free_regions_starting_at(first, obj_regions); |
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785 } |
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786 } |
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787 |
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788 if (first == G1_NO_HRM_INDEX) { |
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789 // Policy: We could not find enough regions for the humongous object in the |
|
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790 // free list. Look through the heap to find a mix of free and uncommitted regions. |
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791 // If so, try expansion. |
|
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792 first = _hrm.find_contiguous_empty_or_unavailable(obj_regions); |
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793 if (first != G1_NO_HRM_INDEX) { |
|
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794 // We found something. Make sure these regions are committed, i.e. expand |
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795 // the heap. Alternatively we could do a defragmentation GC. |
|
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796 ergo_verbose1(ErgoHeapSizing, |
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797 "attempt heap expansion", |
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798 ergo_format_reason("humongous allocation request failed") |
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799 ergo_format_byte("allocation request"), |
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800 word_size * HeapWordSize); |
|
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801 |
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802 _hrm.expand_at(first, obj_regions); |
|
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803 g1_policy()->record_new_heap_size(num_regions()); |
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804 |
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805 #ifdef ASSERT |
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806 for (uint i = first; i < first + obj_regions; ++i) { |
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807 HeapRegion* hr = region_at(i); |
|
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808 assert(hr->is_free(), "sanity"); |
|
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809 assert(hr->is_empty(), "sanity"); |
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810 assert(is_on_master_free_list(hr), "sanity"); |
|
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811 } |
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812 #endif |
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813 _hrm.allocate_free_regions_starting_at(first, obj_regions); |
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814 } else { |
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815 // Policy: Potentially trigger a defragmentation GC. |
| 2152 | 816 } |
| 817 } | |
| 818 | |
| 2361 | 819 HeapWord* result = NULL; |
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820 if (first != G1_NO_HRM_INDEX) { |
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821 result = humongous_obj_allocate_initialize_regions(first, obj_regions, |
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822 word_size, context); |
| 2361 | 823 assert(result != NULL, "it should always return a valid result"); |
|
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824 |
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825 // A successful humongous object allocation changes the used space |
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826 // information of the old generation so we need to recalculate the |
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827 // sizes and update the jstat counters here. |
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828 g1mm()->update_sizes(); |
| 2152 | 829 } |
| 830 | |
| 831 verify_region_sets_optional(); | |
| 2361 | 832 |
| 833 return result; | |
| 342 | 834 } |
| 835 | |
| 1973 | 836 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 837 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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838 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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839 |
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840 unsigned int dummy_gc_count_before; |
|
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841 int dummy_gclocker_retry_count = 0; |
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842 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
| 342 | 843 } |
| 844 | |
| 845 HeapWord* | |
| 846 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 847 bool* gc_overhead_limit_was_exceeded) { |
| 848 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 849 |
| 10405 | 850 // Loop until the allocation is satisfied, or unsatisfied after GC. |
|
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851 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
| 1973 | 852 unsigned int gc_count_before; |
|
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853 |
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854 HeapWord* result = NULL; |
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855 if (!isHumongous(word_size)) { |
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856 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
|
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857 } else { |
|
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858 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
|
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859 } |
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860 if (result != NULL) { |
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861 return result; |
| 342 | 862 } |
| 863 | |
| 864 // Create the garbage collection operation... | |
| 1973 | 865 VM_G1CollectForAllocation op(gc_count_before, word_size); |
|
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866 op.set_allocation_context(AllocationContext::current()); |
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867 |
| 342 | 868 // ...and get the VM thread to execute it. |
| 869 VMThread::execute(&op); | |
| 1973 | 870 |
| 871 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 872 // If the operation was successful we'll return the result even | |
| 873 // if it is NULL. If the allocation attempt failed immediately | |
| 874 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 875 HeapWord* result = op.result(); | |
| 876 if (result != NULL && !isHumongous(word_size)) { | |
| 877 // Allocations that take place on VM operations do not do any | |
| 878 // card dirtying and we have to do it here. We only have to do | |
| 879 // this for non-humongous allocations, though. | |
| 880 dirty_young_block(result, word_size); | |
| 881 } | |
| 342 | 882 return result; |
| 1973 | 883 } else { |
|
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884 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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885 return NULL; |
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|
886 } |
| 1973 | 887 assert(op.result() == NULL, |
| 888 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 889 } |
| 890 | |
| 891 // Give a warning if we seem to be looping forever. | |
| 892 if ((QueuedAllocationWarningCount > 0) && | |
| 893 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 894 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 895 } |
| 896 } | |
| 1973 | 897 |
| 898 ShouldNotReachHere(); | |
|
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899 return NULL; |
| 342 | 900 } |
| 901 | |
|
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902 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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903 AllocationContext_t context, |
|
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904 unsigned int *gc_count_before_ret, |
|
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905 int* gclocker_retry_count_ret) { |
|
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906 // Make sure you read the note in attempt_allocation_humongous(). |
|
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907 |
|
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|
908 assert_heap_not_locked_and_not_at_safepoint(); |
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909 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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910 "be called for humongous allocation requests"); |
|
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911 |
|
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|
912 // We should only get here after the first-level allocation attempt |
|
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|
913 // (attempt_allocation()) failed to allocate. |
|
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|
914 |
|
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|
915 // We will loop until a) we manage to successfully perform the |
|
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|
916 // allocation or b) we successfully schedule a collection which |
|
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|
917 // fails to perform the allocation. b) is the only case when we'll |
|
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|
918 // return NULL. |
|
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|
919 HeapWord* result = NULL; |
|
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920 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
921 bool should_try_gc; |
|
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|
922 unsigned int gc_count_before; |
|
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|
923 |
|
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|
924 { |
|
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|
925 MutexLockerEx x(Heap_lock); |
|
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|
926 result = _allocator->mutator_alloc_region(context)->attempt_allocation_locked(word_size, |
|
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|
927 false /* bot_updates */); |
|
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|
928 if (result != NULL) { |
|
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|
929 return result; |
|
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|
930 } |
|
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|
931 |
|
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|
932 // If we reach here, attempt_allocation_locked() above failed to |
|
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|
933 // allocate a new region. So the mutator alloc region should be NULL. |
|
20404
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|
934 assert(_allocator->mutator_alloc_region(context)->get() == NULL, "only way to get here"); |
|
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|
935 |
|
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|
936 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
937 if (g1_policy()->can_expand_young_list()) { |
|
3914
20213c8a3c40
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|
938 // No need for an ergo verbose message here, |
|
20213c8a3c40
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|
939 // can_expand_young_list() does this when it returns true. |
|
20404
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|
940 result = _allocator->mutator_alloc_region(context)->attempt_allocation_force(word_size, |
|
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|
941 false /* bot_updates */); |
|
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|
942 if (result != NULL) { |
|
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|
943 return result; |
|
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|
944 } |
|
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|
945 } |
|
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|
946 should_try_gc = false; |
|
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|
947 } else { |
|
6106
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|
948 // The GCLocker may not be active but the GCLocker initiated |
|
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|
949 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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|
950 // returns true). In this case we do not try this GC and |
|
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|
951 // wait until the GCLocker initiated GC is performed, and |
|
1d478c993020
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|
952 // then retry the allocation. |
|
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|
953 if (GC_locker::needs_gc()) { |
|
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|
954 should_try_gc = false; |
|
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|
955 } else { |
|
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|
956 // Read the GC count while still holding the Heap_lock. |
|
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|
957 gc_count_before = total_collections(); |
|
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|
958 should_try_gc = true; |
|
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|
959 } |
|
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|
960 } |
|
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|
961 } |
|
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|
962 |
|
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|
963 if (should_try_gc) { |
|
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|
964 bool succeeded; |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
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12082
diff
changeset
|
965 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
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12082
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changeset
|
966 GCCause::_g1_inc_collection_pause); |
|
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|
967 if (result != NULL) { |
|
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|
968 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
969 return result; |
|
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|
970 } |
|
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|
971 |
|
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|
972 if (succeeded) { |
|
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|
973 // If we get here we successfully scheduled a collection which |
|
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|
974 // failed to allocate. No point in trying to allocate |
|
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|
975 // further. We'll just return NULL. |
|
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|
976 MutexLockerEx x(Heap_lock); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
977 *gc_count_before_ret = total_collections(); |
|
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|
978 return NULL; |
|
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|
979 } |
|
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|
980 } else { |
|
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|
981 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
2e093b564241
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changeset
|
982 MutexLockerEx x(Heap_lock); |
|
2e093b564241
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changeset
|
983 *gc_count_before_ret = total_collections(); |
|
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|
984 return NULL; |
|
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|
985 } |
|
6106
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|
986 // The GCLocker is either active or the GCLocker initiated |
|
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|
987 // GC has not yet been performed. Stall until it is and |
|
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|
988 // then retry the allocation. |
|
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|
989 GC_locker::stall_until_clear(); |
|
8853
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|
990 (*gclocker_retry_count_ret) += 1; |
|
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991 } |
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992 |
| 10405 | 993 // We can reach here if we were unsuccessful in scheduling a |
|
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994 // collection (because another thread beat us to it) or if we were |
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995 // stalled due to the GC locker. In either can we should retry the |
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996 // allocation attempt in case another thread successfully |
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997 // performed a collection and reclaimed enough space. We do the |
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998 // first attempt (without holding the Heap_lock) here and the |
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999 // follow-on attempt will be at the start of the next loop |
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1000 // iteration (after taking the Heap_lock). |
|
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1001 result = _allocator->mutator_alloc_region(context)->attempt_allocation(word_size, |
|
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1002 false /* bot_updates */); |
|
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1003 if (result != NULL) { |
|
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1004 return result; |
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1005 } |
|
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1006 |
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1007 // Give a warning if we seem to be looping forever. |
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1008 if ((QueuedAllocationWarningCount > 0) && |
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1009 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1010 warning("G1CollectedHeap::attempt_allocation_slow() " |
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1011 "retries %d times", try_count); |
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1012 } |
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1013 } |
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1014 |
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1015 ShouldNotReachHere(); |
|
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1016 return NULL; |
|
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1017 } |
|
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1018 |
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1019 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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1020 unsigned int * gc_count_before_ret, |
|
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1021 int* gclocker_retry_count_ret) { |
|
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1022 // The structure of this method has a lot of similarities to |
|
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1023 // attempt_allocation_slow(). The reason these two were not merged |
|
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1024 // into a single one is that such a method would require several "if |
|
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1025 // allocation is not humongous do this, otherwise do that" |
|
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1026 // conditional paths which would obscure its flow. In fact, an early |
|
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1027 // version of this code did use a unified method which was harder to |
|
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1028 // follow and, as a result, it had subtle bugs that were hard to |
|
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1029 // track down. So keeping these two methods separate allows each to |
|
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1030 // be more readable. It will be good to keep these two in sync as |
|
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1031 // much as possible. |
|
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1032 |
|
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1033 assert_heap_not_locked_and_not_at_safepoint(); |
|
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1034 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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1035 "should only be called for humongous allocations"); |
|
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1036 |
|
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|
1037 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
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|
1038 // need to start a marking cycle at each humongous object allocation. We do |
|
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|
1039 // the check before we do the actual allocation. The reason for doing it |
|
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|
1040 // before the allocation is that we avoid having to keep track of the newly |
|
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|
1041 // allocated memory while we do a GC. |
|
4910
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1042 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
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|
1043 word_size)) { |
|
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|
1044 collect(GCCause::_g1_humongous_allocation); |
|
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|
1045 } |
|
6a78aa6ac1ff
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|
1046 |
|
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1047 // We will loop until a) we manage to successfully perform the |
|
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|
1048 // allocation or b) we successfully schedule a collection which |
|
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|
1049 // fails to perform the allocation. b) is the only case when we'll |
|
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|
1050 // return NULL. |
|
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|
1051 HeapWord* result = NULL; |
|
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1052 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
1053 bool should_try_gc; |
|
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|
1054 unsigned int gc_count_before; |
|
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|
1055 |
|
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|
1056 { |
|
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|
1057 MutexLockerEx x(Heap_lock); |
|
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|
1058 |
|
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|
1059 // Given that humongous objects are not allocated in young |
|
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|
1060 // regions, we'll first try to do the allocation without doing a |
|
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|
1061 // collection hoping that there's enough space in the heap. |
|
20404
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|
1062 result = humongous_obj_allocate(word_size, AllocationContext::current()); |
|
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|
1063 if (result != NULL) { |
|
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|
1064 return result; |
|
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|
1065 } |
|
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|
1066 |
|
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|
1067 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
1068 should_try_gc = false; |
|
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|
1069 } else { |
|
6106
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
|
1070 // 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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|
1071 // 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
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diff
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|
1072 // 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
|
1073 // wait until the GCLocker initiated GC is performed, and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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parents:
6064
diff
changeset
|
1074 // then retry the allocation. |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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diff
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|
1075 if (GC_locker::needs_gc()) { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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6064
diff
changeset
|
1076 should_try_gc = false; |
|
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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|
1077 } else { |
|
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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|
1078 // Read the GC count while still holding the Heap_lock. |
|
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
1079 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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|
1080 should_try_gc = true; |
|
1d478c993020
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|
1081 } |
|
2433
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|
1082 } |
|
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|
1083 } |
|
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diff
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|
1084 |
|
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|
1085 if (should_try_gc) { |
|
abdfc822206f
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|
1086 // If we failed to allocate the humongous object, we should try to |
|
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|
1087 // do a collection pause (if we're allowed) in case it reclaims |
|
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|
1088 // enough space for the allocation to succeed after the pause. |
|
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|
1089 |
|
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diff
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|
1090 bool succeeded; |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
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|
1091 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
f7d3b4387a16
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brutisso
parents:
12082
diff
changeset
|
1092 GCCause::_g1_humongous_allocation); |
|
2433
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|
1093 if (result != NULL) { |
|
abdfc822206f
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diff
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|
1094 assert(succeeded, "only way to get back a non-NULL result"); |
|
abdfc822206f
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diff
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|
1095 return result; |
|
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diff
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|
1096 } |
|
abdfc822206f
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diff
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|
1097 |
|
abdfc822206f
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diff
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|
1098 if (succeeded) { |
|
abdfc822206f
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diff
changeset
|
1099 // If we get here we successfully scheduled a collection which |
|
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|
1100 // failed to allocate. No point in trying to allocate |
|
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|
1101 // further. We'll just return NULL. |
|
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|
1102 MutexLockerEx x(Heap_lock); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
1103 *gc_count_before_ret = total_collections(); |
|
2433
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|
1104 return NULL; |
|
abdfc822206f
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diff
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|
1105 } |
|
abdfc822206f
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|
1106 } else { |
|
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
1107 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
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1108 MutexLockerEx x(Heap_lock); |
|
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1109 *gc_count_before_ret = total_collections(); |
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1110 return NULL; |
|
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1111 } |
|
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1112 // The GCLocker is either active or the GCLocker initiated |
|
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1113 // GC has not yet been performed. Stall until it is and |
|
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1114 // then retry the allocation. |
|
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1115 GC_locker::stall_until_clear(); |
|
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1116 (*gclocker_retry_count_ret) += 1; |
|
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1117 } |
|
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1118 |
| 10405 | 1119 // We can reach here if we were unsuccessful in scheduling a |
|
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1120 // collection (because another thread beat us to it) or if we were |
|
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1121 // stalled due to the GC locker. In either can we should retry the |
|
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1122 // allocation attempt in case another thread successfully |
|
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1123 // performed a collection and reclaimed enough space. Give a |
|
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1124 // warning if we seem to be looping forever. |
|
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1125 |
|
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1126 if ((QueuedAllocationWarningCount > 0) && |
|
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1127 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1128 warning("G1CollectedHeap::attempt_allocation_humongous() " |
|
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1129 "retries %d times", try_count); |
|
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1130 } |
|
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1131 } |
|
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1132 |
|
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1133 ShouldNotReachHere(); |
|
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1134 return NULL; |
|
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1135 } |
|
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1136 |
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1137 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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1138 AllocationContext_t context, |
|
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1139 bool expect_null_mutator_alloc_region) { |
| 2152 | 1140 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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1141 assert(_allocator->mutator_alloc_region(context)->get() == NULL || |
|
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1142 !expect_null_mutator_alloc_region, |
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1143 "the current alloc region was unexpectedly found to be non-NULL"); |
|
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1144 |
|
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|
1145 if (!isHumongous(word_size)) { |
|
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1146 return _allocator->mutator_alloc_region(context)->attempt_allocation_locked(word_size, |
|
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1147 false /* bot_updates */); |
|
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1148 } else { |
|
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|
1149 HeapWord* result = humongous_obj_allocate(word_size, context); |
|
4829
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1150 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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|
1151 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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|
1152 } |
|
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|
1153 return result; |
|
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|
1154 } |
|
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|
1155 |
|
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|
1156 ShouldNotReachHere(); |
| 342 | 1157 } |
| 1158 | |
| 1159 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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1160 G1CollectedHeap* _g1h; |
| 342 | 1161 ModRefBarrierSet* _mr_bs; |
| 1162 public: | |
|
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1163 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
| 12080 | 1164 _g1h(g1h), _mr_bs(mr_bs) {} |
| 1165 | |
| 342 | 1166 bool doHeapRegion(HeapRegion* r) { |
| 12080 | 1167 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1168 | |
|
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1169 if (r->continuesHumongous()) { |
| 12080 | 1170 // We'll assert that the strong code root list and RSet is empty |
| 1171 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
| 1172 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
| 342 | 1173 return false; |
|
6254
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|
1174 } |
| 12080 | 1175 |
|
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1176 _g1h->reset_gc_time_stamps(r); |
| 12080 | 1177 hrrs->clear(); |
| 342 | 1178 // You might think here that we could clear just the cards |
| 1179 // corresponding to the used region. But no: if we leave a dirty card | |
| 1180 // in a region we might allocate into, then it would prevent that card | |
| 1181 // from being enqueued, and cause it to be missed. | |
| 1182 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1183 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 12080 | 1184 |
| 342 | 1185 return false; |
| 1186 } | |
| 1187 }; | |
| 1188 | |
|
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|
1189 void G1CollectedHeap::clear_rsets_post_compaction() { |
| 12343 | 1190 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
|
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1191 heap_region_iterate(&rs_clear); |
|
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1192 } |
| 342 | 1193 |
|
626
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|
1194 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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|
1195 G1CollectedHeap* _g1h; |
|
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1196 UpdateRSOopClosure _cl; |
|
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|
1197 int _worker_i; |
|
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|
1198 public: |
|
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|
1199 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1200 _cl(g1->g1_rem_set(), worker_i), |
|
626
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|
1201 _worker_i(worker_i), |
|
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|
1202 _g1h(g1) |
|
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|
1203 { } |
|
1960
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|
1204 |
|
626
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|
1205 bool doHeapRegion(HeapRegion* r) { |
|
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1206 if (!r->continuesHumongous()) { |
|
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|
1207 _cl.set_from(r); |
|
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|
1208 r->oop_iterate(&_cl); |
|
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|
1209 } |
|
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|
1210 return false; |
|
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|
1211 } |
|
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|
1212 }; |
|
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|
1213 |
|
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|
1214 class ParRebuildRSTask: public AbstractGangTask { |
|
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|
1215 G1CollectedHeap* _g1; |
|
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|
1216 public: |
|
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|
1217 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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|
1218 : AbstractGangTask("ParRebuildRSTask"), |
|
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|
1219 _g1(g1) |
|
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|
1220 { } |
|
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|
1221 |
|
4728
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|
1222 void work(uint worker_id) { |
|
441e946dc1af
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|
1223 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
441e946dc1af
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|
1224 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
bca17e38de00
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|
1225 _g1->workers()->active_workers(), |
|
626
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|
1226 HeapRegion::RebuildRSClaimValue); |
|
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|
1227 } |
|
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|
1228 }; |
|
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|
1229 |
|
3778
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|
1230 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
5f6f2615433a
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|
1231 private: |
|
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|
1232 G1HRPrinter* _hr_printer; |
|
5f6f2615433a
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|
1233 public: |
|
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|
1234 bool doHeapRegion(HeapRegion* hr) { |
|
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|
1235 assert(!hr->is_young(), "not expecting to find young regions"); |
|
20481
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|
1236 if (hr->is_free()) { |
|
c02ec279b062
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|
1237 // We only generate output for non-empty regions. |
|
c02ec279b062
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|
1238 } else if (hr->startsHumongous()) { |
|
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changeset
|
1239 if (hr->region_num() == 1) { |
|
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|
1240 // single humongous region |
|
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|
1241 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
3778
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|
1242 } else { |
|
20481
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|
1243 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
3778
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|
1244 } |
|
20481
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|
1245 } else if (hr->continuesHumongous()) { |
|
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changeset
|
1246 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
c02ec279b062
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diff
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|
1247 } else if (hr->is_old()) { |
|
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diff
changeset
|
1248 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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|
1249 } else { |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
1250 ShouldNotReachHere(); |
|
3778
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 return false; |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1253 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1254 |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1255 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1256 : _hr_printer(hr_printer) { } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1257 }; |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1258 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
1259 void G1CollectedHeap::print_hrm_post_compaction() { |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1260 PostCompactionPrinterClosure cl(hr_printer()); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1261 heap_region_iterate(&cl); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1262 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
1263 |
| 1973 | 1264 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1265 bool clear_all_soft_refs, |
| 342 | 1266 size_t word_size) { |
| 2152 | 1267 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1268 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1269 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1270 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1271 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1272 |
| 10405 | 1273 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
|
1274 gc_timer->register_gc_start(); |
| 10405 | 1275 |
| 1276 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
| 1277 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
| 1278 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1279 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1280 ResourceMark rm; |
| 1281 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
1282 print_heap_before_gc(); |
| 10405 | 1283 trace_heap_before_gc(gc_tracer); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1284 |
|
17866
270d7cb38f40
8038934: Remove prefix allocated_ from methods and variables in Metaspace
ehelin
parents:
17844
diff
changeset
|
1285 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
|
1286 |
| 2152 | 1287 verify_region_sets_optional(); |
| 342 | 1288 |
|
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1289 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
|
1290 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
|
1291 |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1292 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
|
1293 |
| 342 | 1294 { |
| 1295 IsGCActiveMark x; | |
| 1296 | |
| 1297 // Timing | |
| 6030 | 1298 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
|
1299 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1300 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1301 |
| 342 | 1302 { |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
1303 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL, gc_tracer->gc_id()); |
|
10098
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diff
changeset
|
1304 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1305 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1306 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1307 double start = os::elapsedTime(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1308 g1_policy()->record_full_collection_start(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1309 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1310 // 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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parents:
8855
diff
changeset
|
1311 // 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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parents:
8855
diff
changeset
|
1312 // could consider timing and reporting how long we wait in the |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1313 // following two methods. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1314 wait_while_free_regions_coming(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1315 // If we start the compaction before the CM threads finish |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1316 // 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
|
1317 // 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
|
1318 // 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:
8855
diff
changeset
|
1319 // early. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1320 _cm->root_regions()->abort(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1321 _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
|
1322 append_secondary_free_list_if_not_empty_with_lock(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1323 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1324 gc_prologue(true); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1325 increment_total_collections(true /* full gc */); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1326 increment_old_marking_cycles_started(); |
|
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:
8855
diff
changeset
|
1328 assert(used() == recalculate_used(), "Should be equal"); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1329 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1330 verify_before_gc(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1331 |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
1332 check_bitmaps("Full GC Start"); |
| 10405 | 1333 pre_full_gc_dump(gc_timer); |
|
10098
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:
8855
diff
changeset
|
1335 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1336 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1337 // Disable discovery and empty the discovered lists |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1338 // for the CM ref processor. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1339 ref_processor_cm()->disable_discovery(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1340 ref_processor_cm()->abandon_partial_discovery(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1341 ref_processor_cm()->verify_no_references_recorded(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1342 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1343 // 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
|
1344 // 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
|
1345 // wait_until_scan_finished() below. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1346 concurrent_mark()->abort(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1347 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1348 // 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
|
1349 _allocator->release_mutator_alloc_region(); |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
1350 _allocator->abandon_gc_alloc_regions(); |
|
10098
71013d764f6e
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parents:
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diff
changeset
|
1351 g1_rem_set()->cleanupHRRS(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1352 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1353 // We should call this after we retire any currently active alloc |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1354 // 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
|
1355 // before the start GC event. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1356 _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
|
1357 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1358 // 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
|
1359 // 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
johnc
parents:
8855
diff
changeset
|
1360 // incremental collection set and then start rebuilding it afresh |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1361 // 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
|
1362 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1363 g1_policy()->clear_incremental_cset(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1364 g1_policy()->stop_incremental_cset_building(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1365 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1366 tear_down_region_sets(false /* free_list_only */); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1367 g1_policy()->set_gcs_are_young(true); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1368 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1369 // See the comments in g1CollectedHeap.hpp and |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1370 // G1CollectedHeap::ref_processing_init() about |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1371 // how reference processing currently works in G1. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
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diff
changeset
|
1372 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1373 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1374 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
71013d764f6e
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diff
changeset
|
1375 |
|
71013d764f6e
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parents:
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diff
changeset
|
1376 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1377 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1378 |
|
71013d764f6e
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parents:
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diff
changeset
|
1379 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1380 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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parents:
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diff
changeset
|
1381 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1382 // Do collection work |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1383 { |
|
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1384 HandleMark hm; // Discard invalid handles created during gc |
|
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1385 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
|
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1386 } |
|
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|
1387 |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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|
1388 assert(num_free_regions() == 0, "we should not have added any free regions"); |
|
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1389 rebuild_region_sets(false /* free_list_only */); |
|
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|
1390 |
|
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|
1391 // Enqueue any discovered reference objects that have |
|
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1392 // not been removed from the discovered lists. |
|
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|
1393 ref_processor_stw()->enqueue_discovered_references(); |
|
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|
1394 |
|
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|
1395 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
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|
1396 |
|
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|
1397 MemoryService::track_memory_usage(); |
|
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|
1398 |
|
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|
1399 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
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|
1400 ref_processor_stw()->verify_no_references_recorded(); |
|
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1401 |
|
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1402 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
|
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|
1403 ClassLoaderDataGraph::purge(); |
| 12080 | 1404 MetaspaceAux::verify_metrics(); |
|
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1405 |
|
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1406 // Note: since we've just done a full GC, concurrent |
|
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1407 // marking is no longer active. Therefore we need not |
|
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|
1408 // re-enable reference discovery for the CM ref processor. |
|
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1409 // That will be done at the start of the next marking cycle. |
|
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|
1410 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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|
1411 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1412 |
|
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|
1413 reset_gc_time_stamp(); |
|
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|
1414 // Since everything potentially moved, we will clear all remembered |
| 10405 | 1415 // sets, and clear all cards. Later we will rebuild remembered |
|
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1416 // sets. We will also reset the GC time stamps of the regions. |
|
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|
1417 clear_rsets_post_compaction(); |
|
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|
1418 check_gc_time_stamps(); |
|
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|
1419 |
|
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|
1420 // Resize the heap if necessary. |
|
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|
1421 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
|
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|
1422 |
|
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|
1423 if (_hr_printer.is_active()) { |
|
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|
1424 // We should do this after we potentially resize the heap so |
|
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|
1425 // that all the COMMIT / UNCOMMIT events are generated before |
|
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|
1426 // the end GC event. |
|
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|
1427 |
|
20377
a8ea2f110d87
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|
1428 print_hrm_post_compaction(); |
|
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|
1429 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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|
1430 } |
|
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|
1431 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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|
1432 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
194f52aa2f23
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|
1433 if (hot_card_cache->use_cache()) { |
|
194f52aa2f23
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|
1434 hot_card_cache->reset_card_counts(); |
|
194f52aa2f23
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|
1435 hot_card_cache->reset_hot_cache(); |
|
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|
1436 } |
|
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|
1437 |
|
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|
1438 // Rebuild remembered sets of all regions. |
|
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|
1439 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
1440 uint n_workers = |
|
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|
1441 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1442 workers()->active_workers(), |
|
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|
1443 Threads::number_of_non_daemon_threads()); |
|
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|
1444 assert(UseDynamicNumberOfGCThreads || |
|
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|
1445 n_workers == workers()->total_workers(), |
|
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|
1446 "If not dynamic should be using all the workers"); |
|
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|
1447 workers()->set_active_workers(n_workers); |
|
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|
1448 // Set parallel threads in the heap (_n_par_threads) only |
|
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|
1449 // before a parallel phase and always reset it to 0 after |
|
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|
1450 // the phase so that the number of parallel threads does |
|
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|
1451 // no get carried forward to a serial phase where there |
|
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|
1452 // may be code that is "possibly_parallel". |
|
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|
1453 set_par_threads(n_workers); |
|
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|
1454 |
|
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|
1455 ParRebuildRSTask rebuild_rs_task(this); |
|
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|
1456 assert(check_heap_region_claim_values( |
|
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|
1457 HeapRegion::InitialClaimValue), "sanity check"); |
|
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|
1458 assert(UseDynamicNumberOfGCThreads || |
|
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|
1459 workers()->active_workers() == workers()->total_workers(), |
|
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|
1460 "Unless dynamic should use total workers"); |
|
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|
1461 // Use the most recent number of active workers |
|
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|
1462 assert(workers()->active_workers() > 0, |
|
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|
1463 "Active workers not properly set"); |
|
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|
1464 set_par_threads(workers()->active_workers()); |
|
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|
1465 workers()->run_task(&rebuild_rs_task); |
|
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|
1466 set_par_threads(0); |
|
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|
1467 assert(check_heap_region_claim_values( |
|
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|
1468 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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|
1469 reset_heap_region_claim_values(); |
|
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|
1470 } else { |
|
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|
1471 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1472 heap_region_iterate(&rebuild_rs); |
|
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|
1473 } |
|
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|
1474 |
| 12080 | 1475 // Rebuild the strong code root lists for each region |
| 1476 rebuild_strong_code_roots(); | |
| 1477 | |
|
10098
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|
1478 if (true) { // FIXME |
|
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|
1479 MetaspaceGC::compute_new_size(); |
|
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|
1480 } |
| 342 | 1481 |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1482 #ifdef TRACESPINNING |
|
10098
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|
1483 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1484 #endif |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
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545
diff
changeset
|
1485 |
|
10098
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|
1486 // Discard all rset updates |
|
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|
1487 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
|
1488 assert(dirty_card_queue_set().completed_buffers_num() == 0, "DCQS should be empty"); |
|
10098
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|
1489 |
|
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|
1490 _young_list->reset_sampled_info(); |
|
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|
1491 // At this point there should be no regions in the |
|
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|
1492 // entire heap tagged as young. |
|
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|
1493 assert(check_young_list_empty(true /* check_heap */), |
|
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|
1494 "young list should be empty at this point"); |
|
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|
1495 |
|
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|
1496 // Update the number of full collections that have been completed. |
|
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|
1497 increment_old_marking_cycles_completed(false /* concurrent */); |
|
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|
1498 |
|
20377
a8ea2f110d87
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|
1499 _hrm.verify_optional(); |
|
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|
1500 verify_region_sets_optional(); |
|
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|
1501 |
|
10373
3a4805ad0005
8015244: G1: Verification after a full GC is incorrectly placed.
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10372
diff
changeset
|
1502 verify_after_gc(); |
|
3a4805ad0005
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10372
diff
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|
1503 |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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20282
diff
changeset
|
1504 // 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
|
1505 // Note we cannot do this when we clear the next marking bitmap in |
|
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1506 // ConcurrentMark::abort() above since VerifyDuringGC verifies the |
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1507 // objects marked during a full GC against the previous bitmap. |
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1508 // But we need to clear it before calling check_bitmaps below since |
|
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1509 // the full GC has compacted objects and updated TAMS but not updated |
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1510 // the prev bitmap. |
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1511 if (G1VerifyBitmaps) { |
|
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1512 ((CMBitMap*) concurrent_mark()->prevMarkBitMap())->clearAll(); |
|
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1513 } |
|
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|
1514 check_bitmaps("Full GC End"); |
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1515 |
|
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1516 // Start a new incremental collection set for the next pause |
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1517 assert(g1_policy()->collection_set() == NULL, "must be"); |
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1518 g1_policy()->start_incremental_cset_building(); |
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1519 |
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1520 clear_cset_fast_test(); |
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1521 |
|
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1522 _allocator->init_mutator_alloc_region(); |
|
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1523 |
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1524 double end = os::elapsedTime(); |
|
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1525 g1_policy()->record_full_collection_end(); |
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1526 |
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1527 if (G1Log::fine()) { |
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1528 g1_policy()->print_heap_transition(); |
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1529 } |
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1530 |
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1531 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1532 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1533 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1534 // before any GC notifications are raised. |
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1535 g1mm()->update_sizes(); |
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1536 |
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1537 gc_epilogue(true); |
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1538 } |
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1539 |
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1540 if (G1Log::finer()) { |
|
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1541 g1_policy()->print_detailed_heap_transition(true /* full */); |
|
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1542 } |
|
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1543 |
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1544 print_heap_after_gc(); |
| 10405 | 1545 trace_heap_after_gc(gc_tracer); |
| 1546 | |
| 1547 post_full_gc_dump(gc_timer); | |
| 1548 | |
|
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1549 gc_timer->register_gc_end(); |
| 10405 | 1550 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
|
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1551 } |
| 1973 | 1552 |
| 1553 return true; | |
| 342 | 1554 } |
| 1555 | |
| 1556 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1557 // do_collection() will return whether it succeeded in performing |
| 1558 // the GC. Currently, there is no facility on the | |
| 1559 // do_full_collection() API to notify the caller than the collection | |
| 1560 // did not succeed (e.g., because it was locked out by the GC | |
| 1561 // locker). So, right now, we'll ignore the return value. | |
| 1562 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1563 clear_all_soft_refs, | |
| 1564 0 /* word_size */); | |
| 342 | 1565 } |
| 1566 | |
| 1567 // This code is mostly copied from TenuredGeneration. | |
| 1568 void | |
| 1569 G1CollectedHeap:: | |
| 1570 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1571 // Include the current allocation, if any, and bytes that will be | |
| 1572 // pre-allocated to support collections, as "used". | |
| 1573 const size_t used_after_gc = used(); | |
| 1574 const size_t capacity_after_gc = capacity(); | |
| 1575 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1576 | |
|
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1577 // This is enforced in arguments.cpp. |
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1578 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1579 "otherwise the code below doesn't make sense"); |
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1580 |
| 342 | 1581 // We don't have floating point command-line arguments |
|
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1582 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1583 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
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1584 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1585 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1586 | |
|
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1587 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1588 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1589 |
|
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1590 // We have to be careful here as these two calculations can overflow |
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1591 // 32-bit size_t's. |
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1592 double used_after_gc_d = (double) used_after_gc; |
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1593 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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|
1594 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1595 |
|
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1596 // Let's make sure that they are both under the max heap size, which |
|
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1597 // by default will make them fit into a size_t. |
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|
1598 double desired_capacity_upper_bound = (double) max_heap_size; |
|
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1599 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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|
1600 desired_capacity_upper_bound); |
|
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1601 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1602 desired_capacity_upper_bound); |
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1603 |
|
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1604 // We can now safely turn them into size_t's. |
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1605 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1606 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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|
1607 |
|
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1608 // This assert only makes sense here, before we adjust them |
|
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|
1609 // with respect to the min and max heap size. |
|
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|
1610 assert(minimum_desired_capacity <= maximum_desired_capacity, |
|
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|
1611 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
|
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|
1612 "maximum_desired_capacity = "SIZE_FORMAT, |
|
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|
1613 minimum_desired_capacity, maximum_desired_capacity)); |
|
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|
1614 |
|
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1615 // Should not be greater than the heap max size. No need to adjust |
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1616 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1617 // we'll try to make the capacity larger than it, not smaller). |
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1618 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1619 // Should not be less than the heap min size. No need to adjust it |
|
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1620 // with respect to the heap max size as it's an upper bound (i.e., |
|
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1621 // we'll try to make the capacity smaller than it, not greater). |
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|
1622 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1623 |
|
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1624 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1625 // Don't expand unless it's significant |
| 1626 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1627 ergo_verbose4(ErgoHeapSizing, |
|
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1628 "attempt heap expansion", |
|
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1629 ergo_format_reason("capacity lower than " |
|
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1630 "min desired capacity after Full GC") |
|
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1631 ergo_format_byte("capacity") |
|
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|
1632 ergo_format_byte("occupancy") |
|
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|
1633 ergo_format_byte_perc("min desired capacity"), |
|
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|
1634 capacity_after_gc, used_after_gc, |
|
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|
1635 minimum_desired_capacity, (double) MinHeapFreeRatio); |
|
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|
1636 expand(expand_bytes); |
| 342 | 1637 |
| 1638 // No expansion, now see if we want to shrink | |
|
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1639 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1640 // Capacity too large, compute shrinking size |
| 1641 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1642 ergo_verbose4(ErgoHeapSizing, |
|
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1643 "attempt heap shrinking", |
|
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1644 ergo_format_reason("capacity higher than " |
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1645 "max desired capacity after Full GC") |
|
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1646 ergo_format_byte("capacity") |
|
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1647 ergo_format_byte("occupancy") |
|
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|
1648 ergo_format_byte_perc("max desired capacity"), |
|
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1649 capacity_after_gc, used_after_gc, |
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1650 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1651 shrink(shrink_bytes); |
| 1652 } | |
| 1653 } | |
| 1654 | |
| 1655 | |
| 1656 HeapWord* | |
| 1973 | 1657 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
|
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1658 AllocationContext_t context, |
| 1973 | 1659 bool* succeeded) { |
| 2152 | 1660 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1661 |
| 1662 *succeeded = true; | |
| 1663 // Let's attempt the allocation first. | |
|
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1664 HeapWord* result = |
|
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1665 attempt_allocation_at_safepoint(word_size, |
|
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1666 context, |
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1667 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1668 if (result != NULL) { |
| 1669 assert(*succeeded, "sanity"); | |
| 1670 return result; | |
| 1671 } | |
| 342 | 1672 |
| 1673 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1674 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1675 // expansion over collection. (This might change in the future if we can | |
| 1676 // do something smarter than full collection to satisfy a failed alloc.) | |
|
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1677 result = expand_and_allocate(word_size, context); |
| 342 | 1678 if (result != NULL) { |
| 1973 | 1679 assert(*succeeded, "sanity"); |
| 342 | 1680 return result; |
| 1681 } | |
| 1682 | |
| 1973 | 1683 // Expansion didn't work, we'll try to do a Full GC. |
| 1684 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1685 false, /* clear_all_soft_refs */ | |
| 1686 word_size); | |
| 1687 if (!gc_succeeded) { | |
| 1688 *succeeded = false; | |
| 1689 return NULL; | |
| 1690 } | |
| 1691 | |
| 1692 // Retry the allocation | |
| 1693 result = attempt_allocation_at_safepoint(word_size, | |
|
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1694 context, |
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1695 true /* expect_null_mutator_alloc_region */); |
| 342 | 1696 if (result != NULL) { |
| 1973 | 1697 assert(*succeeded, "sanity"); |
| 342 | 1698 return result; |
| 1699 } | |
| 1700 | |
| 1973 | 1701 // Then, try a Full GC that will collect all soft references. |
| 1702 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1703 true, /* clear_all_soft_refs */ | |
| 1704 word_size); | |
| 1705 if (!gc_succeeded) { | |
| 1706 *succeeded = false; | |
| 1707 return NULL; | |
| 1708 } | |
| 1709 | |
| 1710 // Retry the allocation once more | |
| 1711 result = attempt_allocation_at_safepoint(word_size, | |
|
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1712 context, |
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1713 true /* expect_null_mutator_alloc_region */); |
| 342 | 1714 if (result != NULL) { |
| 1973 | 1715 assert(*succeeded, "sanity"); |
| 342 | 1716 return result; |
| 1717 } | |
| 1718 | |
|
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1719 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1720 "Flag should have been handled and cleared prior to this point"); |
|
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1721 |
| 342 | 1722 // What else? We might try synchronous finalization later. If the total |
| 1723 // space available is large enough for the allocation, then a more | |
| 1724 // complete compaction phase than we've tried so far might be | |
| 1725 // appropriate. | |
| 1973 | 1726 assert(*succeeded, "sanity"); |
| 342 | 1727 return NULL; |
| 1728 } | |
| 1729 | |
| 1730 // Attempting to expand the heap sufficiently | |
| 1731 // to support an allocation of the given "word_size". If | |
| 1732 // successful, perform the allocation and return the address of the | |
| 1733 // allocated block, or else "NULL". | |
| 1734 | |
|
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1735 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size, AllocationContext_t context) { |
| 2152 | 1736 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1737 | |
| 1738 verify_region_sets_optional(); | |
| 1973 | 1739 |
|
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1740 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1741 ergo_verbose1(ErgoHeapSizing, |
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1742 "attempt heap expansion", |
|
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1743 ergo_format_reason("allocation request failed") |
|
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1744 ergo_format_byte("allocation request"), |
|
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1745 word_size * HeapWordSize); |
|
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1746 if (expand(expand_bytes)) { |
|
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1747 _hrm.verify_optional(); |
|
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1748 verify_region_sets_optional(); |
|
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1749 return attempt_allocation_at_safepoint(word_size, |
|
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1750 context, |
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1751 false /* expect_null_mutator_alloc_region */); |
|
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1752 } |
|
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1753 return NULL; |
| 342 | 1754 } |
| 1755 | |
|
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1756 bool G1CollectedHeap::expand(size_t expand_bytes) { |
|
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1757 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1758 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1759 HeapRegion::GrainBytes); | |
|
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1760 ergo_verbose2(ErgoHeapSizing, |
|
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1761 "expand the heap", |
|
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1762 ergo_format_byte("requested expansion amount") |
|
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1763 ergo_format_byte("attempted expansion amount"), |
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1764 expand_bytes, aligned_expand_bytes); |
|
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1765 |
|
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1766 if (is_maximal_no_gc()) { |
|
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1767 ergo_verbose0(ErgoHeapSizing, |
|
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1768 "did not expand the heap", |
|
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1769 ergo_format_reason("heap already fully expanded")); |
|
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1770 return false; |
|
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|
1771 } |
|
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1772 |
|
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1773 uint regions_to_expand = (uint)(aligned_expand_bytes / HeapRegion::GrainBytes); |
|
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1774 assert(regions_to_expand > 0, "Must expand by at least one region"); |
|
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1775 |
|
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1776 uint expanded_by = _hrm.expand_by(regions_to_expand); |
|
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1777 |
|
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1778 if (expanded_by > 0) { |
|
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1779 size_t actual_expand_bytes = expanded_by * HeapRegion::GrainBytes; |
| 3766 | 1780 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); |
|
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1781 g1_policy()->record_new_heap_size(num_regions()); |
|
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1782 } else { |
|
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1783 ergo_verbose0(ErgoHeapSizing, |
|
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1784 "did not expand the heap", |
|
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|
1785 ergo_format_reason("heap expansion operation failed")); |
|
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1786 // The expansion of the virtual storage space was unsuccessful. |
|
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1787 // Let's see if it was because we ran out of swap. |
|
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1788 if (G1ExitOnExpansionFailure && |
|
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1789 _hrm.available() >= regions_to_expand) { |
|
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1790 // We had head room... |
|
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|
1791 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
| 342 | 1792 } |
| 1793 } | |
|
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1794 return regions_to_expand > 0; |
| 342 | 1795 } |
| 1796 | |
| 3766 | 1797 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1798 size_t aligned_shrink_bytes = |
| 1799 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1800 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1801 HeapRegion::GrainBytes); | |
|
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1802 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1803 |
|
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1804 uint num_regions_removed = _hrm.shrink_by(num_regions_to_remove); |
|
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1805 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
|
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1806 |
|
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1807 ergo_verbose3(ErgoHeapSizing, |
|
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1808 "shrink the heap", |
|
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1809 ergo_format_byte("requested shrinking amount") |
|
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1810 ergo_format_byte("aligned shrinking amount") |
|
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|
1811 ergo_format_byte("attempted shrinking amount"), |
|
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1812 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
|
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1813 if (num_regions_removed > 0) { |
|
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1814 g1_policy()->record_new_heap_size(num_regions()); |
|
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1815 } else { |
|
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|
1816 ergo_verbose0(ErgoHeapSizing, |
|
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1817 "did not shrink the heap", |
|
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|
1818 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1819 } |
| 1820 } | |
| 1821 | |
| 1822 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1823 verify_region_sets_optional(); |
| 1824 | |
|
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1825 // We should only reach here at the end of a Full GC which means we |
|
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1826 // should not not be holding to any GC alloc regions. The method |
|
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|
1827 // below will make sure of that and do any remaining clean up. |
|
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1828 _allocator->abandon_gc_alloc_regions(); |
|
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1829 |
| 2152 | 1830 // Instead of tearing down / rebuilding the free lists here, we |
| 1831 // could instead use the remove_all_pending() method on free_list to | |
| 1832 // remove only the ones that we need to remove. | |
| 4072 | 1833 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1834 shrink_helper(shrink_bytes); |
| 4072 | 1835 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1836 |
|
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1837 _hrm.verify_optional(); |
| 2152 | 1838 verify_region_sets_optional(); |
| 342 | 1839 } |
| 1840 | |
| 1841 // Public methods. | |
| 1842 | |
| 1843 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1844 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1845 #endif // _MSC_VER | |
| 1846 | |
| 1847 | |
| 1848 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1849 SharedHeap(policy_), | |
| 1850 _g1_policy(policy_), | |
| 1111 | 1851 _dirty_card_queue_set(false), |
| 1705 | 1852 _into_cset_dirty_card_queue_set(false), |
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1853 _is_alive_closure_cm(this), |
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1854 _is_alive_closure_stw(this), |
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1855 _ref_processor_cm(NULL), |
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1856 _ref_processor_stw(NULL), |
| 342 | 1857 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1858 _bot_shared(NULL), | |
| 10405 | 1859 _evac_failure_scan_stack(NULL), |
| 342 | 1860 _mark_in_progress(false), |
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1861 _cg1r(NULL), |
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1862 _g1mm(NULL), |
| 342 | 1863 _refine_cte_cl(NULL), |
| 1864 _full_collection(false), | |
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1865 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1866 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1867 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
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1868 _humongous_is_live(), |
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1869 _has_humongous_reclaim_candidates(false), |
| 2152 | 1870 _free_regions_coming(false), |
| 342 | 1871 _young_list(new YoungList(this)), |
| 1872 _gc_time_stamp(0), | |
| 6595 | 1873 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1874 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1875 _expand_heap_after_alloc_failure(true), |
| 526 | 1876 _surviving_young_words(NULL), |
|
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1877 _old_marking_cycles_started(0), |
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1878 _old_marking_cycles_completed(0), |
| 10405 | 1879 _concurrent_cycle_started(false), |
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1880 _in_cset_fast_test(), |
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1881 _dirty_cards_region_list(NULL), |
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1882 _worker_cset_start_region(NULL), |
| 10405 | 1883 _worker_cset_start_region_time_stamp(NULL), |
| 1884 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
| 1885 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
| 1886 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
| 1887 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
| 1888 | |
| 1889 _g1h = this; | |
| 342 | 1890 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
| 1891 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1892 } | |
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1893 |
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1894 _allocator = G1Allocator::create_allocator(_g1h); |
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1895 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1896 |
| 342 | 1897 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1898 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1899 | |
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1900 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
| 342 | 1901 assert(n_rem_sets > 0, "Invariant."); |
| 1902 | |
| 6197 | 1903 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1904 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
| 10405 | 1905 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
|
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1906 |
| 342 | 1907 for (int i = 0; i < n_queues; i++) { |
| 1908 RefToScanQueue* q = new RefToScanQueue(); | |
| 1909 q->initialize(); | |
| 1910 _task_queues->register_queue(i, q); | |
| 10405 | 1911 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
| 1912 } | |
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1913 clear_cset_start_regions(); |
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1914 |
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1915 // Initialize the G1EvacuationFailureALot counters and flags. |
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1916 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1917 |
| 342 | 1918 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1919 } | |
| 1920 | |
| 1921 jint G1CollectedHeap::initialize() { | |
| 1166 | 1922 CollectedHeap::pre_initialize(); |
| 342 | 1923 os::enable_vtime(); |
| 1924 | |
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1925 G1Log::init(); |
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1926 |
| 342 | 1927 // Necessary to satisfy locking discipline assertions. |
| 1928 | |
| 1929 MutexLocker x(Heap_lock); | |
| 1930 | |
|
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1931 // We have to initialize the printer before committing the heap, as |
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1932 // it will be used then. |
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1933 _hr_printer.set_active(G1PrintHeapRegions); |
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1934 |
| 342 | 1935 // While there are no constraints in the GC code that HeapWordSize |
| 1936 // be any particular value, there are multiple other areas in the | |
| 1937 // system which believe this to be true (e.g. oop->object_size in some | |
| 1938 // cases incorrectly returns the size in wordSize units rather than | |
| 1939 // HeapWordSize). | |
| 1940 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 1941 | |
| 1942 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 1943 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
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1944 size_t heap_alignment = collector_policy()->heap_alignment(); |
| 342 | 1945 |
| 1946 // Ensure that the sizes are properly aligned. | |
| 1947 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1948 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
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1949 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
| 342 | 1950 |
|
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1951 _refine_cte_cl = new RefineCardTableEntryClosure(); |
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1952 |
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1953 _cg1r = new ConcurrentG1Refine(this, _refine_cte_cl); |
| 342 | 1954 |
| 1955 // Reserve the maximum. | |
|
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1956 |
|
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1957 // When compressed oops are enabled, the preferred heap base |
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1958 // is calculated by subtracting the requested size from the |
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1959 // 32Gb boundary and using the result as the base address for |
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1960 // heap reservation. If the requested size is not aligned to |
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1961 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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1962 // into the ReservedHeapSpace constructor) then the actual |
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1963 // base of the reserved heap may end up differing from the |
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1964 // address that was requested (i.e. the preferred heap base). |
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1965 // If this happens then we could end up using a non-optimal |
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1966 // compressed oops mode. |
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1967 |
|
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1968 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
|
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1969 heap_alignment); |
| 342 | 1970 |
| 1971 // It is important to do this in a way such that concurrent readers can't | |
| 10405 | 1972 // temporarily think something is in the heap. (I've actually seen this |
| 342 | 1973 // happen in asserts: DLD.) |
| 1974 _reserved.set_word_size(0); | |
| 1975 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 1976 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 1977 | |
| 1978 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 1979 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 1980 set_barrier_set(rem_set()->bs()); | |
| 12343 | 1981 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
| 1982 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
| 342 | 1983 return JNI_ENOMEM; |
| 1984 } | |
| 1985 | |
| 1986 // Also create a G1 rem set. | |
| 12343 | 1987 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
| 342 | 1988 |
| 1989 // Carve out the G1 part of the heap. | |
| 1990 | |
|
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1991 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); |
| 20337 | 1992 G1RegionToSpaceMapper* heap_storage = |
| 1993 G1RegionToSpaceMapper::create_mapper(g1_rs, | |
| 1994 UseLargePages ? os::large_page_size() : os::vm_page_size(), | |
| 1995 HeapRegion::GrainBytes, | |
| 1996 1, | |
| 1997 mtJavaHeap); | |
| 1998 heap_storage->set_mapping_changed_listener(&_listener); | |
| 1999 | |
| 2000 // Reserve space for the block offset table. We do not support automatic uncommit | |
| 2001 // for the card table at this time. BOT only. | |
| 2002 ReservedSpace bot_rs(G1BlockOffsetSharedArray::compute_size(g1_rs.size() / HeapWordSize)); | |
| 2003 G1RegionToSpaceMapper* bot_storage = | |
| 2004 G1RegionToSpaceMapper::create_mapper(bot_rs, | |
| 2005 os::vm_page_size(), | |
| 2006 HeapRegion::GrainBytes, | |
| 2007 G1BlockOffsetSharedArray::N_bytes, | |
| 2008 mtGC); | |
| 2009 | |
| 2010 ReservedSpace cardtable_rs(G1SATBCardTableLoggingModRefBS::compute_size(g1_rs.size() / HeapWordSize)); | |
| 2011 G1RegionToSpaceMapper* cardtable_storage = | |
| 2012 G1RegionToSpaceMapper::create_mapper(cardtable_rs, | |
| 2013 os::vm_page_size(), | |
| 2014 HeapRegion::GrainBytes, | |
| 2015 G1BlockOffsetSharedArray::N_bytes, | |
| 2016 mtGC); | |
| 2017 | |
| 2018 // Reserve space for the card counts table. | |
| 2019 ReservedSpace card_counts_rs(G1BlockOffsetSharedArray::compute_size(g1_rs.size() / HeapWordSize)); | |
| 2020 G1RegionToSpaceMapper* card_counts_storage = | |
| 2021 G1RegionToSpaceMapper::create_mapper(card_counts_rs, | |
| 2022 os::vm_page_size(), | |
| 2023 HeapRegion::GrainBytes, | |
| 2024 G1BlockOffsetSharedArray::N_bytes, | |
| 2025 mtGC); | |
| 2026 | |
| 2027 // Reserve space for prev and next bitmap. | |
| 2028 size_t bitmap_size = CMBitMap::compute_size(g1_rs.size()); | |
| 2029 | |
| 2030 ReservedSpace prev_bitmap_rs(ReservedSpace::allocation_align_size_up(bitmap_size)); | |
| 2031 G1RegionToSpaceMapper* prev_bitmap_storage = | |
| 2032 G1RegionToSpaceMapper::create_mapper(prev_bitmap_rs, | |
| 2033 os::vm_page_size(), | |
| 2034 HeapRegion::GrainBytes, | |
| 2035 CMBitMap::mark_distance(), | |
| 2036 mtGC); | |
| 2037 | |
| 2038 ReservedSpace next_bitmap_rs(ReservedSpace::allocation_align_size_up(bitmap_size)); | |
| 2039 G1RegionToSpaceMapper* next_bitmap_storage = | |
| 2040 G1RegionToSpaceMapper::create_mapper(next_bitmap_rs, | |
| 2041 os::vm_page_size(), | |
| 2042 HeapRegion::GrainBytes, | |
| 2043 CMBitMap::mark_distance(), | |
| 2044 mtGC); | |
| 2045 | |
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2046 _hrm.initialize(heap_storage, prev_bitmap_storage, next_bitmap_storage, bot_storage, cardtable_storage, card_counts_storage); |
| 20337 | 2047 g1_barrier_set()->initialize(cardtable_storage); |
| 2048 // Do later initialization work for concurrent refinement. | |
| 2049 _cg1r->init(card_counts_storage); | |
|
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2050 |
|
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2051 // 6843694 - ensure that the maximum region index can fit |
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2052 // in the remembered set structures. |
|
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2053 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
|
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2054 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
|
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2055 |
|
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2056 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
|
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2057 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
|
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2058 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
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2059 "too many cards per region"); |
|
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2060 |
|
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2061 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
| 2152 | 2062 |
| 20337 | 2063 _bot_shared = new G1BlockOffsetSharedArray(_reserved, bot_storage); |
| 342 | 2064 |
| 2065 _g1h = this; | |
| 2066 | |
|
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2067 _in_cset_fast_test.initialize(_hrm.reserved().start(), _hrm.reserved().end(), HeapRegion::GrainBytes); |
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changeset
|
2068 _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
|
2069 |
| 342 | 2070 // Create the ConcurrentMark data structure and thread. |
| 2071 // (Must do this late, so that "max_regions" is defined.) | |
| 20337 | 2072 _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
|
2073 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
|
2074 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
|
2075 return JNI_ENOMEM; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2076 } |
| 342 | 2077 _cmThread = _cm->cmThread(); |
| 2078 | |
| 2079 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2080 HeapRegionRemSet::init_heap(max_regions()); | |
| 2081 | |
| 677 | 2082 // Now expand into the initial heap size. |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2083 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
|
2084 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
|
2085 return JNI_ENOMEM; |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2086 } |
| 342 | 2087 |
| 2088 // Perform any initialization actions delegated to the policy. | |
| 2089 g1_policy()->init(); | |
| 2090 | |
| 2091 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2092 SATB_Q_FL_lock, | |
| 1111 | 2093 G1SATBProcessCompletedThreshold, |
| 342 | 2094 Shared_SATB_Q_lock); |
| 794 | 2095 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2096 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
|
2097 DirtyCardQ_CBL_mon, |
| 794 | 2098 DirtyCardQ_FL_lock, |
| 1111 | 2099 concurrent_g1_refine()->yellow_zone(), |
| 2100 concurrent_g1_refine()->red_zone(), | |
| 794 | 2101 Shared_DirtyCardQ_lock); |
| 2102 | |
|
20504
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2103 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
|
2104 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
|
2105 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
|
2106 -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
|
2107 -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
|
2108 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
|
2109 &JavaThread::dirty_card_queue_set()); |
| 1705 | 2110 |
| 2111 // Initialize the card queue set used to hold cards containing | |
| 2112 // references into the collection set. | |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2113 _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
|
2114 DirtyCardQ_CBL_mon, |
| 1705 | 2115 DirtyCardQ_FL_lock, |
| 2116 -1, // never trigger processing | |
| 2117 -1, // no limit on length | |
| 2118 Shared_DirtyCardQ_lock, | |
| 2119 &JavaThread::dirty_card_queue_set()); | |
| 2120 | |
| 342 | 2121 // In case we're keeping closure specialization stats, initialize those |
| 2122 // counts and that mechanism. | |
| 2123 SpecializationStats::clear(); | |
| 2124 | |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2125 // 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
|
2126 // G1AllocRegion class. |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2127 HeapRegion* dummy_region = _hrm.get_dummy_region(); |
| 20337 | 2128 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2129 // 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
|
2130 // 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
|
2131 // 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
|
2132 // 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
|
2133 dummy_region->set_eden(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2134 // Make sure it's full. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2135 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2136 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2137 |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2138 _allocator->init_mutator_alloc_region(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2139 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2140 // 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
|
2141 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2142 _g1mm = new G1MonitoringSupport(this); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2143 |
| 17764 | 2144 G1StringDedup::initialize(); |
| 2145 | |
| 342 | 2146 return JNI_OK; |
| 2147 } | |
| 2148 | |
|
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2149 void G1CollectedHeap::stop() { |
| 17992 | 2150 // Stop all concurrent threads. We do this to make sure these threads |
| 2151 // 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
|
2152 // that are destroyed during shutdown. |
| 17992 | 2153 _cg1r->stop(); |
| 2154 _cmThread->stop(); | |
| 2155 if (G1StringDedup::is_enabled()) { | |
| 2156 G1StringDedup::stop(); | |
| 2157 } | |
|
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2158 } |
|
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2159 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2160 void G1CollectedHeap::clear_humongous_is_live_table() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2161 guarantee(G1ReclaimDeadHumongousObjectsAtYoungGC, "Should only be called if true"); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2162 _humongous_is_live.clear(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2163 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2164 |
|
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2165 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2166 return HeapRegion::max_region_size(); |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2167 } |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2168 |
| 342 | 2169 void G1CollectedHeap::ref_processing_init() { |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2170 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2171 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2172 // * There are two reference processor instances. One is |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2173 // used to record and process discovered references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2174 // during concurrent marking; the other is used to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2175 // record and process references during STW pauses |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2176 // (both full and incremental). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2177 // * Both ref processors need to 'span' the entire heap as |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2178 // the regions in the collection set may be dotted around. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2179 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2180 // * For the concurrent marking ref processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2181 // * Reference discovery is enabled at initial marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2182 // * Reference discovery is disabled and the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2183 // references processed etc during remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2184 // * Reference discovery is MT (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2185 // * Reference discovery requires a barrier (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2186 // * Reference processing may or may not be MT |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2187 // (depending on the value of ParallelRefProcEnabled |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2188 // and ParallelGCThreads). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2189 // * A full GC disables reference discovery by the CM |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2190 // ref processor and abandons any entries on it's |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2191 // discovered lists. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2192 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2193 // * For the STW processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2194 // * 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
|
2195 // * Processing and enqueueing during a full GC is non-MT. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2196 // * During a full GC, references are processed after marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2197 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 // * 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
|
2199 // of an incremental evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 // * References are processed near the end of a STW evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // * For both types of GC: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2202 // * Discovery is atomic - i.e. not concurrent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2203 // * Reference discovery will not need a barrier. |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2204 |
| 342 | 2205 SharedHeap::ref_processing_init(); |
| 2206 MemRegion mr = reserved_region(); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2207 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2208 // Concurrent Mark ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2210 new ReferenceProcessor(mr, // span |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 (int) ParallelGCThreads, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 // mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2217 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2218 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2219 false, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2220 // 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
|
2221 &_is_alive_closure_cm); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 // is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2223 // (for efficiency/performance) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2224 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2225 // STW ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2226 _ref_processor_stw = |
|
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6484982: G1: process references during evacuation pauses
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|
2227 new ReferenceProcessor(mr, // span |
|
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6484982: G1: process references during evacuation pauses
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|
2228 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2229 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
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changeset
|
2230 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
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|
2231 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2232 (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2233 // mt discovery |
|
4dfb2df418f2
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changeset
|
2234 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2235 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2236 true, |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2237 // 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
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|
2238 &_is_alive_closure_stw); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2239 // is alive closure |
|
4dfb2df418f2
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|
2240 // (for efficiency/performance) |
| 342 | 2241 } |
| 2242 | |
| 2243 size_t G1CollectedHeap::capacity() const { | |
|
20377
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8054819: Rename HeapRegionSeq to HeapRegionManager
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diff
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|
2244 return _hrm.length() * HeapRegion::GrainBytes; |
| 342 | 2245 } |
| 2246 | |
|
6254
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|
2247 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
|
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|
2248 assert(!hr->continuesHumongous(), "pre-condition"); |
|
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|
2249 hr->reset_gc_time_stamp(); |
|
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|
2250 if (hr->startsHumongous()) { |
|
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diff
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|
2251 uint first_index = hr->hrm_index() + 1; |
|
6254
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|
2252 uint last_index = hr->last_hc_index(); |
|
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|
2253 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2254 HeapRegion* chr = region_at(i); |
|
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|
2255 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2256 chr->reset_gc_time_stamp(); |
|
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|
2257 } |
|
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|
2258 } |
|
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|
2259 } |
|
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|
2260 |
|
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|
2261 #ifndef PRODUCT |
|
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|
2262 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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|
2263 private: |
|
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|
2264 unsigned _gc_time_stamp; |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2265 bool _failures; |
|
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|
2266 |
|
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|
2267 public: |
|
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|
2268 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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|
2269 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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|
2270 |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2271 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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|
2272 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
|
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|
2273 if (_gc_time_stamp != region_gc_time_stamp) { |
|
a2f7274eb6ef
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|
2274 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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changeset
|
2275 "expected %d", HR_FORMAT_PARAMS(hr), |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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changeset
|
2276 region_gc_time_stamp, _gc_time_stamp); |
|
a2f7274eb6ef
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changeset
|
2277 _failures = true; |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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changeset
|
2278 } |
|
a2f7274eb6ef
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diff
changeset
|
2279 return false; |
|
a2f7274eb6ef
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6220
diff
changeset
|
2280 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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changeset
|
2281 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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changeset
|
2282 bool failures() { return _failures; } |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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6220
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|
2283 }; |
|
a2f7274eb6ef
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|
2284 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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changeset
|
2285 void G1CollectedHeap::check_gc_time_stamps() { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2286 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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6220
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|
2287 heap_region_iterate(&cl); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2288 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2289 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2290 #endif // PRODUCT |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2291 |
| 1705 | 2292 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2293 DirtyCardQueue* into_cset_dcq, | |
| 2294 bool concurrent, | |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2295 uint worker_i) { |
| 889 | 2296 // 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
|
2297 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
|
2298 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2299 |
| 342 | 2300 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2301 int n_completed_buffers = 0; | |
| 1705 | 2302 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2303 n_completed_buffers++; |
| 2304 } | |
|
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
|
2305 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
| 342 | 2306 dcqs.clear_n_completed_buffers(); |
| 2307 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2308 } | |
| 2309 | |
| 2310 | |
| 2311 // Computes the sum of the storage used by the various regions. | |
| 2312 size_t G1CollectedHeap::used() const { | |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2313 return _allocator->used(); |
| 342 | 2314 } |
| 2315 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2316 size_t G1CollectedHeap::used_unlocked() const { |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2317 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
|
2318 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2319 |
| 342 | 2320 class SumUsedClosure: public HeapRegionClosure { |
| 2321 size_t _used; | |
| 2322 public: | |
| 2323 SumUsedClosure() : _used(0) {} | |
| 2324 bool doHeapRegion(HeapRegion* r) { | |
| 2325 if (!r->continuesHumongous()) { | |
| 2326 _used += r->used(); | |
| 2327 } | |
| 2328 return false; | |
| 2329 } | |
| 2330 size_t result() { return _used; } | |
| 2331 }; | |
| 2332 | |
| 2333 size_t G1CollectedHeap::recalculate_used() const { | |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2334 double recalculate_used_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
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17756
diff
changeset
|
2335 |
| 342 | 2336 SumUsedClosure blk; |
| 3766 | 2337 heap_region_iterate(&blk); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
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17756
diff
changeset
|
2338 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2339 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
| 342 | 2340 return blk.result(); |
| 2341 } | |
| 2342 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2343 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
|
2344 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2345 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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4875
diff
changeset
|
2346 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
|
2347 case GCCause::_g1_humongous_allocation: return true; |
|
20522
d3fd73295885
8059466: Force young GC to initiate marking cycle when stat update is requested
sjohanss
parents:
20504
diff
changeset
|
2348 case GCCause::_update_allocation_context_stats_inc: return true; |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2349 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2350 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2351 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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1611
diff
changeset
|
2352 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2353 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2354 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2355 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2356 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2357 // 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
|
2358 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2359 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2360 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2361 // Let's use the existing mechanism for the allocation |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2362 HeapWord* dummy_obj = humongous_obj_allocate(word_size, |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
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20377
diff
changeset
|
2363 AllocationContext::system()); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2364 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2365 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2366 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2367 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2368 // 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
|
2369 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2370 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2371 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2372 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2373 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2374 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2375 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2376 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
|
2377 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
|
2378 _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
|
2379 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
|
2380 _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
|
2381 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2382 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2383 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2384 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2385 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
|
2386 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2387 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2388 // 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
|
2389 // 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
|
2390 // 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
|
2391 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2392 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2393 // 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
|
2394 // 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
|
2395 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2396 // 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
|
2397 // 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
|
2398 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2399 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2400 // 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
|
2401 assert(concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2402 (_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
|
2403 (_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
|
2404 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
|
2405 "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
|
2406 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2407 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2408 // 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
|
2409 assert(!concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2410 (_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
|
2411 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
|
2412 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2413 "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
|
2414 _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
|
2415 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2416 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2417 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2418 // 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
|
2419 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2420 // is set) so that if a waiter requests another System.gc() it doesn't |
| 10405 | 2421 // 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
|
2422 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2423 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2424 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2425 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2426 // 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
|
2427 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2428 // 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
|
2429 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2430 FullGCCount_lock->notify_all(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2431 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2432 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2433 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
| 10405 | 2434 _concurrent_cycle_started = true; |
| 2435 _gc_timer_cm->register_gc_start(start_time); | |
| 2436 | |
| 2437 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
| 2438 trace_heap_before_gc(_gc_tracer_cm); | |
| 2439 } | |
| 2440 | |
| 2441 void G1CollectedHeap::register_concurrent_cycle_end() { | |
| 2442 if (_concurrent_cycle_started) { | |
| 2443 if (_cm->has_aborted()) { | |
| 2444 _gc_tracer_cm->report_concurrent_mode_failure(); | |
| 2445 } | |
|
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2446 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2447 _gc_timer_cm->register_gc_end(); |
| 10405 | 2448 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
| 2449 | |
| 2450 _concurrent_cycle_started = false; | |
| 2451 } | |
| 2452 } | |
| 2453 | |
| 2454 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
| 2455 if (_concurrent_cycle_started) { | |
| 2456 trace_heap_after_gc(_gc_tracer_cm); | |
| 2457 } | |
| 2458 } | |
| 2459 | |
| 2460 G1YCType G1CollectedHeap::yc_type() { | |
| 2461 bool is_young = g1_policy()->gcs_are_young(); | |
| 2462 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
| 2463 bool is_during_mark = mark_in_progress(); | |
| 2464 | |
| 2465 if (is_initial_mark) { | |
| 2466 return InitialMark; | |
| 2467 } else if (is_during_mark) { | |
| 2468 return DuringMark; | |
| 2469 } else if (is_young) { | |
| 2470 return Normal; | |
| 2471 } else { | |
| 2472 return Mixed; | |
| 2473 } | |
| 2474 } | |
| 2475 | |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2476 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
|
2477 assert_heap_not_locked(); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2478 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2479 unsigned int gc_count_before; |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2480 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
|
2481 bool retry_gc; |
|
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 do { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2484 retry_gc = false; |
|
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 { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2487 MutexLocker ml(Heap_lock); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2488 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2489 // 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
|
2490 gc_count_before = total_collections(); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2491 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
|
2492 } |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2493 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2494 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
|
2495 // 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
|
2496 // 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
|
2497 // we are not requesting a post-GC allocation. |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2498 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2499 0, /* word_size */ |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2500 true, /* should_initiate_conc_mark */ |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2501 g1_policy()->max_pause_time_ms(), |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2502 cause); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2503 op.set_allocation_context(AllocationContext::current()); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2504 |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2505 VMThread::execute(&op); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2506 if (!op.pause_succeeded()) { |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2507 if (old_marking_count_before == _old_marking_cycles_started) { |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2508 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
|
2509 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2510 // 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
|
2511 // 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
|
2512 // 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
|
2513 } |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2514 |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2515 if (retry_gc) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2516 if (GC_locker::is_active_and_needs_gc()) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2517 GC_locker::stall_until_clear(); |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2518 } |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2519 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2520 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2521 } else { |
|
20357
4bfc44ba0d19
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
20337
diff
changeset
|
2522 if (cause == GCCause::_gc_locker || cause == GCCause::_wb_young_gc |
|
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2523 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
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|
2524 |
|
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|
2525 // Schedule a standard evacuation pause. We're setting word_size |
|
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|
2526 // to 0 which means that we are not requesting a post-GC allocation. |
|
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|
2527 VM_G1IncCollectionPause op(gc_count_before, |
|
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|
2528 0, /* word_size */ |
|
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|
2529 false, /* should_initiate_conc_mark */ |
|
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|
2530 g1_policy()->max_pause_time_ms(), |
|
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|
2531 cause); |
|
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|
2532 VMThread::execute(&op); |
|
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|
2533 } else { |
|
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|
2534 // Schedule a Full GC. |
|
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|
2535 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
|
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|
2536 VMThread::execute(&op); |
|
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|
2537 } |
|
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|
2538 } |
|
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|
2539 } while (retry_gc); |
| 342 | 2540 } |
| 2541 | |
| 2542 bool G1CollectedHeap::is_in(const void* p) const { | |
|
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|
2543 if (_hrm.reserved().contains(p)) { |
| 20337 | 2544 // Given that we know that p is in the reserved space, |
| 4708 | 2545 // heap_region_containing_raw() should successfully |
| 2546 // return the containing region. | |
| 2547 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2548 return hr->is_in(p); |
| 2549 } else { | |
|
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|
2550 return false; |
| 342 | 2551 } |
| 2552 } | |
| 2553 | |
| 20337 | 2554 #ifdef ASSERT |
| 2555 bool G1CollectedHeap::is_in_exact(const void* p) const { | |
| 2556 bool contains = reserved_region().contains(p); | |
|
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|
2557 bool available = _hrm.is_available(addr_to_region((HeapWord*)p)); |
| 20337 | 2558 if (contains && available) { |
| 2559 return true; | |
| 2560 } else { | |
| 2561 return false; | |
| 2562 } | |
| 2563 } | |
| 2564 #endif | |
| 2565 | |
| 342 | 2566 // Iteration functions. |
| 2567 | |
|
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|
2568 // Applies an ExtendedOopClosure onto all references of objects within a HeapRegion. |
| 342 | 2569 |
| 2570 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
|
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|
2571 ExtendedOopClosure* _cl; |
| 342 | 2572 public: |
|
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|
2573 IterateOopClosureRegionClosure(ExtendedOopClosure* cl) : _cl(cl) {} |
| 342 | 2574 bool doHeapRegion(HeapRegion* r) { |
|
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|
2575 if (!r->continuesHumongous()) { |
| 342 | 2576 r->oop_iterate(_cl); |
| 2577 } | |
| 2578 return false; | |
| 2579 } | |
| 2580 }; | |
| 2581 | |
|
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|
2582 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
|
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|
2583 IterateOopClosureRegionClosure blk(cl); |
| 3766 | 2584 heap_region_iterate(&blk); |
| 342 | 2585 } |
| 2586 | |
| 2587 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2588 | |
| 2589 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2590 ObjectClosure* _cl; | |
| 2591 public: | |
| 2592 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2593 bool doHeapRegion(HeapRegion* r) { | |
| 2594 if (! r->continuesHumongous()) { | |
| 2595 r->object_iterate(_cl); | |
| 2596 } | |
| 2597 return false; | |
| 2598 } | |
| 2599 }; | |
| 2600 | |
|
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|
2601 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
| 342 | 2602 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2603 heap_region_iterate(&blk); |
| 342 | 2604 } |
| 2605 | |
| 2606 // Calls a SpaceClosure on a HeapRegion. | |
| 2607 | |
| 2608 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2609 SpaceClosure* _cl; | |
| 2610 public: | |
| 2611 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2612 bool doHeapRegion(HeapRegion* r) { | |
| 2613 _cl->do_space(r); | |
| 2614 return false; | |
| 2615 } | |
| 2616 }; | |
| 2617 | |
| 2618 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2619 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2620 heap_region_iterate(&blk); |
| 342 | 2621 } |
| 2622 | |
| 3766 | 2623 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
|
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|
2624 _hrm.iterate(cl); |
| 342 | 2625 } |
| 2626 | |
| 2627 void | |
| 2628 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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|
2629 uint worker_id, |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff
changeset
|
2630 uint num_workers, |
|
6701abbc4441
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|
2631 jint claim_value) const { |
|
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|
2632 _hrm.par_iterate(cl, worker_id, num_workers, claim_value); |
| 355 | 2633 } |
| 2634 | |
| 390 | 2635 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2636 public: | |
| 2637 bool doHeapRegion(HeapRegion* r) { | |
| 2638 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2639 return false; | |
| 2640 } | |
| 2641 }; | |
| 2642 | |
|
4783
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|
2643 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2644 ResetClaimValuesClosure blk; |
| 2645 heap_region_iterate(&blk); | |
| 2646 } | |
| 2647 | |
|
4783
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|
2648 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
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|
2649 ResetClaimValuesClosure blk; |
|
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|
2650 collection_set_iterate(&blk); |
|
023652e49ac0
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|
2651 } |
|
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|
2652 |
| 355 | 2653 #ifdef ASSERT |
| 2654 // This checks whether all regions in the heap have the correct claim | |
| 2655 // value. I also piggy-backed on this a check to ensure that the | |
| 2656 // humongous_start_region() information on "continues humongous" | |
| 2657 // regions is correct. | |
| 2658 | |
| 2659 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2660 private: | |
| 2661 jint _claim_value; | |
|
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|
2662 uint _failures; |
| 355 | 2663 HeapRegion* _sh_region; |
|
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|
2664 |
| 355 | 2665 public: |
| 2666 CheckClaimValuesClosure(jint claim_value) : | |
| 2667 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2668 bool doHeapRegion(HeapRegion* r) { | |
| 2669 if (r->claim_value() != _claim_value) { | |
|
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|
2670 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2671 "claim value = %d, should be %d", |
|
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|
2672 HR_FORMAT_PARAMS(r), |
|
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|
2673 r->claim_value(), _claim_value); |
| 355 | 2674 ++_failures; |
| 2675 } | |
| 2676 if (!r->isHumongous()) { | |
| 2677 _sh_region = NULL; | |
| 2678 } else if (r->startsHumongous()) { | |
| 2679 _sh_region = r; | |
| 2680 } else if (r->continuesHumongous()) { | |
| 2681 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2682 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2683 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2684 HR_FORMAT_PARAMS(r), |
| 355 | 2685 r->humongous_start_region(), |
| 2686 _sh_region); | |
| 2687 ++_failures; | |
| 342 | 2688 } |
| 2689 } | |
| 355 | 2690 return false; |
| 2691 } | |
|
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|
2692 uint failures() { return _failures; } |
| 355 | 2693 }; |
| 2694 | |
| 2695 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2696 CheckClaimValuesClosure cl(claim_value); | |
| 2697 heap_region_iterate(&cl); | |
| 2698 return cl.failures() == 0; | |
| 2699 } | |
|
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|
2700 |
|
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|
2701 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
6010
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|
2702 private: |
|
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|
2703 jint _claim_value; |
|
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|
2704 uint _failures; |
|
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|
2705 |
|
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|
2706 public: |
|
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|
2707 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
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|
2708 _claim_value(claim_value), _failures(0) { } |
|
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|
2709 |
|
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|
2710 uint failures() { return _failures; } |
|
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|
2711 |
|
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|
2712 bool doHeapRegion(HeapRegion* hr) { |
|
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|
2713 assert(hr->in_collection_set(), "how?"); |
|
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|
2714 assert(!hr->isHumongous(), "H-region in CSet"); |
|
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|
2715 if (hr->claim_value() != _claim_value) { |
|
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|
2716 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
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|
2717 "claim value = %d, should be %d", |
|
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|
2718 HR_FORMAT_PARAMS(hr), |
|
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|
2719 hr->claim_value(), _claim_value); |
|
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|
2720 _failures += 1; |
|
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|
2721 } |
|
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|
2722 return false; |
|
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|
2723 } |
|
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|
2724 }; |
|
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|
2725 |
|
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|
2726 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
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|
2727 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2728 collection_set_iterate(&cl); |
|
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|
2729 return cl.failures() == 0; |
|
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|
2730 } |
| 355 | 2731 #endif // ASSERT |
| 342 | 2732 |
|
4709
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|
2733 // Clear the cached CSet starting regions and (more importantly) |
|
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|
2734 // the time stamps. Called when we reset the GC time stamp. |
|
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|
2735 void G1CollectedHeap::clear_cset_start_regions() { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2736 assert(_worker_cset_start_region != NULL, "sanity"); |
|
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|
2737 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
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|
2738 |
|
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|
2739 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
fd2b426c30db
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|
2740 for (int i = 0; i < n_queues; i++) { |
|
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|
2741 _worker_cset_start_region[i] = NULL; |
|
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|
2742 _worker_cset_start_region_time_stamp[i] = 0; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2743 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2744 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2745 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2746 // 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
|
2747 // 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
|
2748 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
|
2749 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
|
2750 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2751 HeapRegion* result = NULL; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2752 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
|
2753 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2754 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
|
2755 // 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
|
2756 // 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
|
2757 // 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
|
2758 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2759 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
|
2760 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
|
2761 return result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2762 } |
|
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 // 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
|
2765 // 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
|
2766 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2767 // 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
|
2768 // 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
|
2769 // avoid contention. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2770 // If we have: |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2771 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2772 // p threads |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2773 // 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
|
2774 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2775 result = g1_policy()->collection_set(); |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2776 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2777 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
|
2778 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
|
2779 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2780 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2781 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2782 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2783 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
|
2784 uint start_ind = 0; |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2785 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2786 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2787 _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
|
2788 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2789 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2790 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
|
2791 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
|
2792 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2793 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2794 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
|
2795 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2796 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2797 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2798 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2799 // 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
|
2800 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2801 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
|
2802 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
|
2803 "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
|
2804 _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
|
2805 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2806 _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
|
2807 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2808 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2809 |
| 342 | 2810 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2811 HeapRegion* r = g1_policy()->collection_set(); | |
| 2812 while (r != NULL) { | |
| 2813 HeapRegion* next = r->next_in_collection_set(); | |
| 2814 if (cl->doHeapRegion(r)) { | |
| 2815 cl->incomplete(); | |
| 2816 return; | |
| 2817 } | |
| 2818 r = next; | |
| 2819 } | |
| 2820 } | |
| 2821 | |
| 2822 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2823 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2824 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2825 // 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
|
2826 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2827 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2828 |
| 342 | 2829 assert(r->in_collection_set(), |
| 2830 "Start region must be a member of the collection set."); | |
| 2831 HeapRegion* cur = r; | |
| 2832 while (cur != NULL) { | |
| 2833 HeapRegion* next = cur->next_in_collection_set(); | |
| 2834 if (cl->doHeapRegion(cur) && false) { | |
| 2835 cl->incomplete(); | |
| 2836 return; | |
| 2837 } | |
| 2838 cur = next; | |
| 2839 } | |
| 2840 cur = g1_policy()->collection_set(); | |
| 2841 while (cur != r) { | |
| 2842 HeapRegion* next = cur->next_in_collection_set(); | |
| 2843 if (cl->doHeapRegion(cur) && false) { | |
| 2844 cl->incomplete(); | |
| 2845 return; | |
| 2846 } | |
| 2847 cur = next; | |
| 2848 } | |
| 2849 } | |
| 2850 | |
|
20304
a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
tschatzl
parents:
20282
diff
changeset
|
2851 HeapRegion* G1CollectedHeap::next_compaction_region(const HeapRegion* from) const { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2852 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
|
2853 while (result != NULL && result->isHumongous()) { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2854 result = _hrm.next_region_in_heap(result); |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2855 } |
|
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2856 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
|
2857 } |
| 342 | 2858 |
| 2859 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
2860 return heap_region_containing(addr); |
| 342 | 2861 } |
| 2862 | |
| 2863 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2864 Space* sp = space_containing(addr); | |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
2865 return sp->block_start(addr); |
| 342 | 2866 } |
| 2867 | |
| 2868 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 2869 Space* sp = space_containing(addr); | |
| 2870 return sp->block_size(addr); | |
| 2871 } | |
| 2872 | |
| 2873 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 2874 Space* sp = space_containing(addr); | |
| 2875 return sp->block_is_obj(addr); | |
| 2876 } | |
| 2877 | |
| 2878 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 2879 return true; | |
| 2880 } | |
| 2881 | |
| 2882 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 17727 | 2883 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
| 2884 } | |
| 2885 | |
| 2886 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
| 2887 return young_list()->eden_used_bytes(); | |
| 2888 } | |
| 2889 | |
| 2890 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
| 2891 // must be smaller than the humongous object limit. | |
| 2892 size_t G1CollectedHeap::max_tlab_size() const { | |
| 2893 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
| 342 | 2894 } |
| 2895 | |
| 2896 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 2897 // Return the remaining space in the cur alloc region, but not less than | |
| 2898 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2899 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2900 // Also, this value can be at most the humongous object threshold, |
| 10405 | 2901 // 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
|
2902 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2903 |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2904 HeapRegion* hr = _allocator->mutator_alloc_region(AllocationContext::current())->get(); |
| 17727 | 2905 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
|
2906 if (hr == NULL) { |
| 17727 | 2907 return max_tlab; |
| 342 | 2908 } else { |
| 17727 | 2909 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
| 342 | 2910 } |
| 2911 } | |
| 2912 | |
| 2913 size_t G1CollectedHeap::max_capacity() const { | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2914 return _hrm.reserved().byte_size(); |
| 342 | 2915 } |
| 2916 | |
| 2917 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 2918 // assert(false, "NYI"); | |
| 2919 return 0; | |
| 2920 } | |
| 2921 | |
| 2922 void G1CollectedHeap::prepare_for_verify() { | |
| 2923 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 2924 ensure_parsability(false); | |
| 2925 } | |
| 2926 g1_rem_set()->prepare_for_verify(); | |
| 2927 } | |
| 2928 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2929 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2930 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2931 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2932 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2933 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2934 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
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2935 return hr->obj_allocated_since_next_marking(obj); |
|
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2936 case VerifyOption_G1UseMarkWord: |
|
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2937 return false; |
|
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|
2938 default: |
|
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2939 ShouldNotReachHere(); |
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2940 } |
|
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2941 return false; // keep some compilers happy |
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2942 } |
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2943 |
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2944 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
|
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2945 switch (vo) { |
|
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2946 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
|
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2947 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
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2948 case VerifyOption_G1UseMarkWord: return NULL; |
|
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2949 default: ShouldNotReachHere(); |
|
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2950 } |
|
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2951 return NULL; // keep some compilers happy |
|
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2952 } |
|
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|
2953 |
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2954 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
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2955 switch (vo) { |
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2956 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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2957 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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2958 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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2959 default: ShouldNotReachHere(); |
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2960 } |
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2961 return false; // keep some compilers happy |
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2962 } |
|
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2963 |
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2964 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
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2965 switch (vo) { |
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2966 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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2967 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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2968 case VerifyOption_G1UseMarkWord: return "NONE"; |
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2969 default: ShouldNotReachHere(); |
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2970 } |
|
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2971 return NULL; // keep some compilers happy |
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2972 } |
|
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|
2973 |
|
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|
2974 class VerifyRootsClosure: public OopClosure { |
| 12080 | 2975 private: |
| 2976 G1CollectedHeap* _g1h; | |
| 2977 VerifyOption _vo; | |
| 2978 bool _failures; | |
| 2979 public: | |
| 2980 // _vo == UsePrevMarking -> use "prev" marking information, | |
| 2981 // _vo == UseNextMarking -> use "next" marking information, | |
| 2982 // _vo == UseMarkWord -> use mark word from object header. | |
| 2983 VerifyRootsClosure(VerifyOption vo) : | |
| 2984 _g1h(G1CollectedHeap::heap()), | |
| 2985 _vo(vo), | |
| 2986 _failures(false) { } | |
| 2987 | |
| 2988 bool failures() { return _failures; } | |
| 2989 | |
| 2990 template <class T> void do_oop_nv(T* p) { | |
| 2991 T heap_oop = oopDesc::load_heap_oop(p); | |
| 2992 if (!oopDesc::is_null(heap_oop)) { | |
| 2993 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 2994 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
| 2995 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
| 2996 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
| 2997 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 2998 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
| 2999 } | |
| 3000 obj->print_on(gclog_or_tty); | |
| 3001 _failures = true; | |
| 3002 } | |
| 3003 } | |
| 3004 } | |
| 3005 | |
| 3006 void do_oop(oop* p) { do_oop_nv(p); } | |
| 3007 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 3008 }; | |
| 3009 | |
|
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|
3010 class G1VerifyCodeRootOopClosure: public OopClosure { |
| 12080 | 3011 G1CollectedHeap* _g1h; |
| 3012 OopClosure* _root_cl; | |
| 3013 nmethod* _nm; | |
| 3014 VerifyOption _vo; | |
| 3015 bool _failures; | |
| 3016 | |
| 3017 template <class T> void do_oop_work(T* p) { | |
| 3018 // First verify that this root is live | |
| 3019 _root_cl->do_oop(p); | |
| 3020 | |
| 3021 if (!G1VerifyHeapRegionCodeRoots) { | |
| 3022 // We're not verifying the code roots attached to heap region. | |
| 3023 return; | |
| 3024 } | |
| 3025 | |
| 3026 // Don't check the code roots during marking verification in a full GC | |
| 3027 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3028 return; | |
| 3029 } | |
| 3030 | |
| 3031 // Now verify that the current nmethod (which contains p) is | |
| 3032 // in the code root list of the heap region containing the | |
| 3033 // object referenced by p. | |
| 3034 | |
| 3035 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3036 if (!oopDesc::is_null(heap_oop)) { | |
| 3037 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3038 | |
| 3039 // Now fetch the region containing the object | |
| 3040 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
| 3041 HeapRegionRemSet* hrrs = hr->rem_set(); | |
| 3042 // Verify that the strong code root list for this region | |
| 3043 // contains the nmethod | |
| 3044 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
| 3045 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
| 3046 "from nmethod "PTR_FORMAT" not in strong " | |
| 3047 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
| 3048 p, _nm, hr->bottom(), hr->end()); | |
| 3049 _failures = true; | |
| 3050 } | |
| 3051 } | |
| 3052 } | |
| 3053 | |
| 3054 public: | |
| 3055 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
| 3056 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
| 3057 | |
| 3058 void do_oop(oop* p) { do_oop_work(p); } | |
| 3059 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 3060 | |
| 3061 void set_nmethod(nmethod* nm) { _nm = nm; } | |
| 3062 bool failures() { return _failures; } | |
| 3063 }; | |
| 3064 | |
| 3065 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
| 3066 G1VerifyCodeRootOopClosure* _oop_cl; | |
| 3067 | |
| 3068 public: | |
| 3069 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
| 3070 _oop_cl(oop_cl) {} | |
| 3071 | |
| 3072 void do_code_blob(CodeBlob* cb) { | |
| 3073 nmethod* nm = cb->as_nmethod_or_null(); | |
| 3074 if (nm != NULL) { | |
| 3075 _oop_cl->set_nmethod(nm); | |
| 3076 nm->oops_do(_oop_cl); | |
| 3077 } | |
| 3078 } | |
| 3079 }; | |
| 3080 | |
| 3081 class YoungRefCounterClosure : public OopClosure { | |
| 3082 G1CollectedHeap* _g1h; | |
| 3083 int _count; | |
| 3084 public: | |
| 3085 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
| 3086 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
| 3087 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 3088 | |
| 3089 int count() { return _count; } | |
| 3090 void reset_count() { _count = 0; }; | |
| 3091 }; | |
| 3092 | |
| 3093 class VerifyKlassClosure: public KlassClosure { | |
| 3094 YoungRefCounterClosure _young_ref_counter_closure; | |
| 3095 OopClosure *_oop_closure; | |
| 3096 public: | |
| 3097 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
| 3098 void do_klass(Klass* k) { | |
| 3099 k->oops_do(_oop_closure); | |
| 3100 | |
| 3101 _young_ref_counter_closure.reset_count(); | |
| 3102 k->oops_do(&_young_ref_counter_closure); | |
| 3103 if (_young_ref_counter_closure.count() > 0) { | |
| 3104 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
| 3105 } | |
| 3106 } | |
| 3107 }; | |
| 3108 | |
| 342 | 3109 class VerifyLivenessOopClosure: public OopClosure { |
|
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3110 G1CollectedHeap* _g1h; |
|
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|
3111 VerifyOption _vo; |
| 342 | 3112 public: |
|
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|
3113 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
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|
3114 _g1h(g1h), _vo(vo) |
|
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|
3115 { } |
|
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|
3116 void do_oop(narrowOop *p) { do_oop_work(p); } |
|
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|
3117 void do_oop( oop *p) { do_oop_work(p); } |
|
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|
3118 |
|
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|
3119 template <class T> void do_oop_work(T *p) { |
|
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|
3120 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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|
3121 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
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|
3122 "Dead object referenced by a not dead object"); |
| 342 | 3123 } |
| 3124 }; | |
| 3125 | |
| 3126 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3127 private: |
| 342 | 3128 G1CollectedHeap* _g1h; |
| 3129 size_t _live_bytes; | |
| 3130 HeapRegion *_hr; | |
|
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|
3131 VerifyOption _vo; |
| 342 | 3132 public: |
|
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|
3133 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3134 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3135 // _vo == UseMarkWord -> use mark word from object header. |
|
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|
3136 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
|
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|
3137 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3138 _g1h = G1CollectedHeap::heap(); |
| 3139 } | |
| 3140 void do_object(oop o) { | |
|
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|
3141 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3142 assert(o != NULL, "Huh?"); |
|
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|
3143 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
|
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|
3144 // If the object is alive according to the mark word, |
|
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|
3145 // then verify that the marking information agrees. |
|
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|
3146 // Note we can't verify the contra-positive of the |
|
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|
3147 // above: if the object is dead (according to the mark |
|
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|
3148 // word), it may not be marked, or may have been marked |
|
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|
3149 // but has since became dead, or may have been allocated |
|
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|
3150 // since the last marking. |
|
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|
3151 if (_vo == VerifyOption_G1UseMarkWord) { |
|
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|
3152 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
|
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|
3153 } |
|
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|
3154 |
|
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changeset
|
3155 o->oop_iterate_no_header(&isLive); |
|
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|
3156 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
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|
3157 size_t obj_size = o->size(); // Make sure we don't overflow |
|
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|
3158 _live_bytes += (obj_size * HeapWordSize); |
|
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|
3159 } |
| 342 | 3160 } |
| 3161 } | |
| 3162 size_t live_bytes() { return _live_bytes; } | |
| 3163 }; | |
| 3164 | |
| 3165 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3166 HeapRegion *_hr; | |
| 3167 G1CollectedHeap *_g1; | |
| 3168 public: | |
| 3169 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3170 _g1 = G1CollectedHeap::heap(); | |
| 3171 }; | |
| 3172 | |
| 3173 void do_object(oop o) { | |
| 3174 if (o != NULL) { | |
| 3175 HeapWord *start = (HeapWord *) o; | |
| 3176 size_t word_sz = o->size(); | |
| 3177 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3178 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3179 (void*) o, word_sz, | |
| 3180 _g1->isMarkedPrev(o), | |
| 3181 _g1->isMarkedNext(o), | |
| 3182 _hr->obj_allocated_since_prev_marking(o)); | |
| 3183 HeapWord *end = start + word_sz; | |
| 3184 HeapWord *cur; | |
| 3185 int *val; | |
| 3186 for (cur = start; cur < end; cur++) { | |
| 3187 val = (int *) cur; | |
| 3188 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3189 } | |
| 3190 } | |
| 3191 } | |
| 3192 }; | |
| 3193 | |
| 3194 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3195 private: |
|
6254
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|
3196 bool _par; |
|
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|
3197 VerifyOption _vo; |
|
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|
3198 bool _failures; |
| 811 | 3199 public: |
|
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|
3200 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3201 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3202 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3203 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3204 : _par(par), | |
|
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|
3205 _vo(vo), |
|
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|
3206 _failures(false) {} |
|
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|
3207 |
|
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|
3208 bool failures() { |
|
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|
3209 return _failures; |
|
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|
3210 } |
|
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|
3211 |
| 342 | 3212 bool doHeapRegion(HeapRegion* r) { |
|
637
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|
3213 if (!r->continuesHumongous()) { |
|
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|
3214 bool failures = false; |
| 6008 | 3215 r->verify(_vo, &failures); |
|
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|
3216 if (failures) { |
|
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|
3217 _failures = true; |
|
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|
3218 } else { |
|
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|
3219 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
1020
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|
3220 r->object_iterate(¬_dead_yet_cl); |
|
4787
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|
3221 if (_vo != VerifyOption_G1UseNextMarking) { |
|
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|
3222 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
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|
3223 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
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|
3224 "max_live_bytes "SIZE_FORMAT" " |
|
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|
3225 "< calculated "SIZE_FORMAT, |
|
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|
3226 r->bottom(), r->end(), |
|
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|
3227 r->max_live_bytes(), |
|
1020
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|
3228 not_dead_yet_cl.live_bytes()); |
|
4787
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|
3229 _failures = true; |
|
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|
3230 } |
|
2ace1c4ee8da
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diff
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|
3231 } else { |
|
2ace1c4ee8da
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changeset
|
3232 // When vo == UseNextMarking we cannot currently do a sanity |
|
2ace1c4ee8da
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changeset
|
3233 // check on the live bytes as the calculation has not been |
|
2ace1c4ee8da
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|
3234 // finalized yet. |
|
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|
3235 } |
|
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|
3236 } |
| 342 | 3237 } |
|
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|
3238 return false; // stop the region iteration if we hit a failure |
| 342 | 3239 } |
| 3240 }; | |
| 3241 | |
| 12080 | 3242 // This is the task used for parallel verification of the heap regions |
| 390 | 3243 |
| 3244 class G1ParVerifyTask: public AbstractGangTask { | |
| 3245 private: | |
| 3246 G1CollectedHeap* _g1h; | |
|
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|
3247 VerifyOption _vo; |
|
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|
3248 bool _failures; |
| 390 | 3249 |
| 3250 public: | |
|
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|
3251 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3252 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3253 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3254 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3255 AbstractGangTask("Parallel verify task"), |
|
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|
3256 _g1h(g1h), |
|
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|
3257 _vo(vo), |
|
1020
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|
3258 _failures(false) { } |
|
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|
3259 |
|
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|
3260 bool failures() { |
|
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|
3261 return _failures; |
|
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|
3262 } |
| 390 | 3263 |
|
4728
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jmasa
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|
3264 void work(uint worker_id) { |
|
637
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diff
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|
3265 HandleMark hm; |
| 6008 | 3266 VerifyRegionClosure blk(true, _vo); |
|
4728
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jmasa
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|
3267 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
4095
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|
3268 _g1h->workers()->active_workers(), |
| 390 | 3269 HeapRegion::ParVerifyClaimValue); |
|
1020
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|
3270 if (blk.failures()) { |
|
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|
3271 _failures = true; |
|
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changeset
|
3272 } |
| 390 | 3273 } |
| 3274 }; | |
| 3275 | |
| 12080 | 3276 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
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8853
diff
changeset
|
3277 if (SafepointSynchronize::is_at_safepoint()) { |
| 12080 | 3278 assert(Thread::current()->is_VM_thread(), |
| 3279 "Expected to be executed serially by the VM thread at this point"); | |
| 3280 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
3281 if (!silent) { gclog_or_tty->print("Roots "); } |
|
3772
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|
3282 VerifyRootsClosure rootsCl(vo); |
|
6725
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6629
diff
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|
3283 VerifyKlassClosure klassCl(this, &rootsCl); |
|
20278
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8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3284 CLDToKlassAndOopClosure cldCl(&klassCl, &rootsCl, false); |
|
3772
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|
3285 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
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3289
diff
changeset
|
3286 // 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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diff
changeset
|
3287 // 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
|
3288 // 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
|
3289 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
|
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
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20256
diff
changeset
|
3290 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3291 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
3292 process_all_roots(true, // activate StrongRootsScope |
|
2c6ef90f030a
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20274
diff
changeset
|
3293 SO_AllCodeCache, // roots scanning options |
|
2c6ef90f030a
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stefank
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diff
changeset
|
3294 &rootsCl, |
|
2c6ef90f030a
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20274
diff
changeset
|
3295 &cldCl, |
|
2c6ef90f030a
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diff
changeset
|
3296 &blobsCl); |
|
20257
7426d8d76305
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diff
changeset
|
3297 |
| 12080 | 3298 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
|
3772
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|
3299 |
|
6747fd0512e0
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changeset
|
3300 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
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|
3301 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
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changeset
|
3302 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
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changeset
|
3303 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
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diff
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|
3304 // the region sets when not in a full GC. |
|
6747fd0512e0
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diff
changeset
|
3305 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
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johnc
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3766
diff
changeset
|
3306 verify_region_sets(); |
|
6747fd0512e0
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3766
diff
changeset
|
3307 } |
|
6747fd0512e0
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3766
diff
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|
3308 |
| 2152 | 3309 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3310 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3311 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3312 "sanity check"); | |
| 3313 | |
| 6008 | 3314 G1ParVerifyTask task(this, vo); |
|
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|
3315 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
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|
3316 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
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|
3317 "If not dynamic should be using all the workers"); |
|
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|
3318 int n_workers = workers()->active_workers(); |
| 390 | 3319 set_par_threads(n_workers); |
| 3320 workers()->run_task(&task); | |
| 3321 set_par_threads(0); | |
|
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|
3322 if (task.failures()) { |
|
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|
3323 failures = true; |
|
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|
3324 } |
| 390 | 3325 |
|
4095
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|
3326 // Checks that the expected amount of parallel work was done. |
|
bca17e38de00
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4090
diff
changeset
|
3327 // The implication is that n_workers is > 0. |
| 390 | 3328 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3329 "sanity check"); | |
| 3330 | |
| 3331 reset_heap_region_claim_values(); | |
| 3332 | |
| 3333 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3334 "sanity check"); | |
| 3335 } else { | |
| 6008 | 3336 VerifyRegionClosure blk(false, vo); |
| 3766 | 3337 heap_region_iterate(&blk); |
|
1020
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|
3338 if (blk.failures()) { |
|
ff2402f6a50b
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1019
diff
changeset
|
3339 failures = true; |
|
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changeset
|
3340 } |
| 390 | 3341 } |
| 2152 | 3342 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3343 rem_set()->verify(); |
|
1020
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changeset
|
3344 |
| 17764 | 3345 if (G1StringDedup::is_enabled()) { |
| 3346 if (!silent) gclog_or_tty->print("StrDedup "); | |
| 3347 G1StringDedup::verify(); | |
| 3348 } | |
| 3349 | |
|
1020
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|
3350 if (failures) { |
|
ff2402f6a50b
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diff
changeset
|
3351 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3352 // 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
|
3353 // help us track down what went wrong. This is why we call |
|
53074c2c4600
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4072
diff
changeset
|
3354 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3355 print_extended_on(gclog_or_tty); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3356 gclog_or_tty->cr(); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3357 #ifndef PRODUCT |
| 1044 | 3358 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3359 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3360 vo, false /* all */); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3361 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3362 #endif |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3363 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3364 } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3365 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3366 } else { |
| 17764 | 3367 if (!silent) { |
| 3368 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
| 3369 if (G1StringDedup::is_enabled()) { | |
| 3370 gclog_or_tty->print(", StrDedup"); | |
| 3371 } | |
| 3372 gclog_or_tty->print(") "); | |
| 3373 } | |
| 342 | 3374 } |
| 3375 } | |
| 3376 | |
| 12080 | 3377 void G1CollectedHeap::verify(bool silent) { |
| 3378 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3379 } | |
| 3380 | |
| 3381 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
| 3382 double verify_time_ms = 0.0; | |
| 3383 | |
| 3384 if (guard && total_collections() >= VerifyGCStartAt) { | |
| 3385 double verify_start = os::elapsedTime(); | |
| 3386 HandleMark hm; // Discard invalid handles created during verification | |
| 3387 prepare_for_verify(); | |
| 3388 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
| 3389 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
| 3390 } | |
| 3391 | |
| 3392 return verify_time_ms; | |
| 3393 } | |
| 3394 | |
| 3395 void G1CollectedHeap::verify_before_gc() { | |
| 3396 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
| 3397 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
| 3398 } | |
| 3399 | |
| 3400 void G1CollectedHeap::verify_after_gc() { | |
| 3401 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
| 3402 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
| 3403 } | |
| 3404 | |
| 342 | 3405 class PrintRegionClosure: public HeapRegionClosure { |
| 3406 outputStream* _st; | |
| 3407 public: | |
| 3408 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3409 bool doHeapRegion(HeapRegion* r) { | |
| 3410 r->print_on(_st); | |
| 3411 return false; | |
| 3412 } | |
| 3413 }; | |
| 3414 | |
|
17833
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3415 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3416 const HeapRegion* hr, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3417 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3418 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3419 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3420 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3421 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3422 default: ShouldNotReachHere(); |
|
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 return false; // keep some compilers happy |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3425 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3426 |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3427 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3428 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3429 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3430 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3431 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3432 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3433 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3434 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3435 return false; // keep some compilers happy |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3436 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3437 |
| 342 | 3438 void G1CollectedHeap::print_on(outputStream* st) const { |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3439 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3440 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
|
3441 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3442 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3443 _hrm.reserved().start(), |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3444 _hrm.reserved().start() + _hrm.length() + HeapRegion::GrainWords, |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3445 _hrm.reserved().end()); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3446 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3447 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
|
3448 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3449 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
|
3450 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3451 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
|
3452 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
|
3453 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3454 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3455 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3456 } |
|
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 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3459 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3460 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3461 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3462 st->cr(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3463 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
|
3464 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3465 "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
|
3466 "PTAMS=previous top-at-mark-start, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3467 "NTAMS=next top-at-mark-start)"); |
| 342 | 3468 PrintRegionClosure blk(st); |
| 3766 | 3469 heap_region_iterate(&blk); |
| 342 | 3470 } |
| 3471 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3472 void G1CollectedHeap::print_on_error(outputStream* st) const { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3473 this->CollectedHeap::print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3474 |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3475 if (_cm != NULL) { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3476 st->cr(); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3477 _cm->print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3478 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3479 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3480 |
| 342 | 3481 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3482 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3483 workers()->print_worker_threads_on(st); |
| 3484 } | |
| 3485 _cmThread->print_on(st); | |
| 342 | 3486 st->cr(); |
| 1019 | 3487 _cm->print_worker_threads_on(st); |
| 3488 _cg1r->print_worker_threads_on(st); | |
| 17764 | 3489 if (G1StringDedup::is_enabled()) { |
| 3490 G1StringDedup::print_worker_threads_on(st); | |
| 3491 } | |
| 342 | 3492 } |
| 3493 | |
| 3494 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3495 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3496 workers()->threads_do(tc); |
| 3497 } | |
| 3498 tc->do_thread(_cmThread); | |
| 794 | 3499 _cg1r->threads_do(tc); |
| 17764 | 3500 if (G1StringDedup::is_enabled()) { |
| 3501 G1StringDedup::threads_do(tc); | |
| 3502 } | |
| 342 | 3503 } |
| 3504 | |
| 3505 void G1CollectedHeap::print_tracing_info() const { | |
| 3506 // We'll overload this to mean "trace GC pause statistics." | |
| 3507 if (TraceGen0Time || TraceGen1Time) { | |
| 3508 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3509 // to that. | |
| 3510 g1_policy()->print_tracing_info(); | |
| 3511 } | |
| 751 | 3512 if (G1SummarizeRSetStats) { |
| 342 | 3513 g1_rem_set()->print_summary_info(); |
| 3514 } | |
| 1282 | 3515 if (G1SummarizeConcMark) { |
| 342 | 3516 concurrent_mark()->print_summary_info(); |
| 3517 } | |
| 3518 g1_policy()->print_yg_surv_rate_info(); | |
| 3519 SpecializationStats::print(); | |
| 3520 } | |
| 3521 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3522 #ifndef PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3523 // Helpful for debugging RSet issues. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3524 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3525 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3526 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3527 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3528 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3529 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3530 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3531 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3532 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3533 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3534 _occupied_sum += occupied; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3535 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3536 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3537 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3538 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3539 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3540 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3541 hrrs->print(); |
|
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 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3544 return false; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3545 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3546 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3547 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
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 gclog_or_tty->print_cr("========================================"); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3550 gclog_or_tty->print_cr("%s", msg); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3551 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3552 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3553 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3554 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3555 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
|
3556 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3557 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3558 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3559 }; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3560 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3561 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3562 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3563 collection_set_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3564 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3565 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3566 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3567 PrintRSetsClosure cl("Printing All RSets");; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3568 heap_region_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3569 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3570 #endif // PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3571 |
| 342 | 3572 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3573 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3574 "not a garbage-first heap"); | |
| 3575 return _g1h; | |
| 3576 } | |
| 3577 | |
| 3578 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3579 // always_do_update_barrier = false; |
| 342 | 3580 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3581 // Fill TLAB's and such | |
| 17727 | 3582 accumulate_statistics_all_tlabs(); |
| 342 | 3583 ensure_parsability(true); |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3584 |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3585 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3586 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3587 g1_rem_set()->print_periodic_summary_info("Before GC RS summary"); |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3588 } |
| 342 | 3589 } |
| 3590 | |
|
20445
e5668dcf12e9
8057818: collect allocation context statistics at gc pauses
jcoomes
parents:
20404
diff
changeset
|
3591 void G1CollectedHeap::gc_epilogue(bool full) { |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3592 |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3593 if (G1SummarizeRSetStats && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3594 (G1SummarizeRSetStatsPeriod > 0) && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3595 // 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
|
3596 ((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
|
3597 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
|
3598 } |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3599 |
| 342 | 3600 // FIXME: what is this about? |
| 3601 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3602 // is set. | |
| 3603 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3604 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3605 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3606 |
| 17727 | 3607 resize_all_tlabs(); |
|
20445
e5668dcf12e9
8057818: collect allocation context statistics at gc pauses
jcoomes
parents:
20404
diff
changeset
|
3608 allocation_context_stats().update(full); |
| 17727 | 3609 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3610 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3611 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3612 Universe::update_heap_info_at_gc(); |
| 342 | 3613 } |
| 3614 | |
| 1973 | 3615 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3616 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
|
3617 bool* succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3618 GCCause::Cause gc_cause) { |
| 1973 | 3619 assert_heap_not_locked_and_not_at_safepoint(); |
| 342 | 3620 g1_policy()->record_stop_world_start(); |
| 1973 | 3621 VM_G1IncCollectionPause op(gc_count_before, |
| 3622 word_size, | |
| 3623 false, /* should_initiate_conc_mark */ | |
| 3624 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
|
3625 gc_cause); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3626 |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3627 op.set_allocation_context(AllocationContext::current()); |
| 1973 | 3628 VMThread::execute(&op); |
| 3629 | |
| 3630 HeapWord* result = op.result(); | |
| 3631 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3632 assert(result == NULL || ret_succeeded, | |
| 3633 "the result should be NULL if the VM did not succeed"); | |
| 3634 *succeeded = ret_succeeded; | |
| 3635 | |
| 3636 assert_heap_not_locked(); | |
| 3637 return result; | |
| 342 | 3638 } |
| 3639 | |
| 3640 void | |
| 3641 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3642 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
|
3643 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3644 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3645 CGC_lock->notify(); |
| 342 | 3646 } |
| 3647 } | |
| 3648 | |
| 3649 size_t G1CollectedHeap::pending_card_num() { | |
| 3650 size_t extra_cards = 0; | |
| 3651 JavaThread *curr = Threads::first(); | |
| 3652 while (curr != NULL) { | |
| 3653 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3654 extra_cards += dcq.size(); | |
| 3655 curr = curr->next(); | |
| 3656 } | |
| 3657 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3658 size_t buffer_size = dcqs.buffer_size(); | |
| 3659 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3660 |
| 3661 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3662 // in bytes - not the number of 'entries'. We need to convert | |
| 3663 // into a number of cards. | |
| 3664 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3665 } |
| 3666 | |
| 3667 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3668 return g1_rem_set()->cardsScanned(); |
| 342 | 3669 } |
| 3670 | |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3671 bool G1CollectedHeap::humongous_region_is_always_live(uint index) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3672 HeapRegion* region = region_at(index); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3673 assert(region->startsHumongous(), "Must start a humongous object"); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3674 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
|
3675 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3676 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3677 class RegisterHumongousWithInCSetFastTestClosure : public HeapRegionClosure { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3678 private: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3679 size_t _total_humongous; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3680 size_t _candidate_humongous; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3681 public: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3682 RegisterHumongousWithInCSetFastTestClosure() : _total_humongous(0), _candidate_humongous(0) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3683 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3684 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3685 virtual bool doHeapRegion(HeapRegion* r) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3686 if (!r->startsHumongous()) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3687 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3688 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3689 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3690 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3691 uint region_idx = r->hrm_index(); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3692 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
|
3693 // 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
|
3694 // 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
|
3695 // 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
|
3696 if (is_candidate) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3697 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
|
3698 _candidate_humongous++; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3699 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3700 _total_humongous++; |
|
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 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3703 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3704 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3705 size_t total_humongous() const { return _total_humongous; } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3706 size_t candidate_humongous() const { return _candidate_humongous; } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3707 }; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3708 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3709 void G1CollectedHeap::register_humongous_regions_with_in_cset_fast_test() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3710 if (!G1ReclaimDeadHumongousObjectsAtYoungGC) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3711 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
|
3712 return; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3713 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3714 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3715 RegisterHumongousWithInCSetFastTestClosure cl; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3716 heap_region_iterate(&cl); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3717 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
|
3718 cl.candidate_humongous()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3719 _has_humongous_reclaim_candidates = cl.candidate_humongous() > 0; |
|
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 if (_has_humongous_reclaim_candidates) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3722 clear_humongous_is_live_table(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3723 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3724 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3725 |
| 342 | 3726 void |
| 3727 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3728 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3729 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3730 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3731 if (_surviving_young_words == NULL) { |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3732 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
| 342 | 3733 "Not enough space for young surv words summary."); |
| 3734 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3735 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
|
3736 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3737 for (uint i = 0; i < array_length; ++i) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3738 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3739 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3740 #endif // !ASSERT |
| 342 | 3741 } |
| 3742 | |
| 3743 void | |
| 3744 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3745 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
|
3746 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
|
3747 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3748 _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
|
3749 } |
| 342 | 3750 } |
| 3751 | |
| 3752 void | |
| 3753 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3754 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3755 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3756 _surviving_young_words = NULL; |
| 3757 } | |
| 3758 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3759 #ifdef ASSERT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3760 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3761 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3762 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3763 // 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
|
3764 // 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
|
3765 // 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
|
3766 // 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
|
3767 // 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
|
3768 // 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
|
3769 // 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
|
3770 // 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
|
3771 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3772 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
|
3773 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3774 // 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
|
3775 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3776 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3777 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3778 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3779 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3780 |
| 1709 | 3781 #if TASKQUEUE_STATS |
| 3782 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3783 st->print_raw_cr("GC Task Stats"); | |
| 3784 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3785 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3786 } | |
| 3787 | |
| 3788 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3789 print_taskqueue_stats_hdr(st); | |
| 3790 | |
| 3791 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3792 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3793 for (int i = 0; i < n; ++i) { |
| 3794 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3795 totals += task_queue(i)->stats; | |
| 3796 } | |
| 3797 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3798 | |
| 3799 DEBUG_ONLY(totals.verify()); | |
| 3800 } | |
| 3801 | |
| 3802 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3803 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3804 for (int i = 0; i < n; ++i) { |
| 3805 task_queue(i)->stats.reset(); | |
| 3806 } | |
| 3807 } | |
| 3808 #endif // TASKQUEUE_STATS | |
| 3809 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3810 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3811 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3812 return; |
|
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 |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3815 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
|
3816 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3817 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
|
3818 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3819 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
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 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3822 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3823 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3824 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3825 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3826 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3827 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3828 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3829 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3830 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3831 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3832 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3833 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
|
3834 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3835 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3836 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3837 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3838 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3839 gclog_or_tty->print("--"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3840 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3841 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3842 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
|
3843 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3844 gclog_or_tty->flush(); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3845 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3846 |
| 1973 | 3847 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3848 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3849 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3850 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3851 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3852 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3853 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3854 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3855 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3856 _gc_timer_stw->register_gc_start(); |
| 10405 | 3857 |
| 3858 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
| 3859 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3860 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3861 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3862 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3863 print_heap_before_gc(); |
| 10405 | 3864 trace_heap_before_gc(_gc_tracer_stw); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3865 |
| 2152 | 3866 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3867 verify_dirty_young_regions(); |
| 2152 | 3868 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3869 // 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
|
3870 // 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
|
3871 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3872 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3873 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3874 // 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
|
3875 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3876 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 // 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
|
3879 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
|
3880 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3881 // 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
|
3882 // 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
|
3883 // 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
|
3884 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
|
3885 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3886 // 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
|
3887 { |
| 10405 | 3888 EvacuationInfo evacuation_info; |
| 3889 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3890 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3891 // 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
|
3892 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3893 increment_old_marking_cycles_started(); |
| 10405 | 3894 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
|
3895 } |
| 10405 | 3896 |
| 3897 _gc_tracer_stw->report_yc_type(yc_type()); | |
| 3898 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3899 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3900 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3901 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
|
3902 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
|
3903 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
|
3904 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3905 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3906 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3907 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3908 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3909 |
| 2361 | 3910 // If the secondary_free_list is not empty, append it to the |
| 3911 // free_list. No need to wait for the cleanup operation to finish; | |
| 3912 // the region allocation code will check the secondary_free_list | |
| 3913 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3914 // set, skip this step so that the region allocation code has to | |
| 3915 // get entries from the secondary_free_list. | |
| 2152 | 3916 if (!G1StressConcRegionFreeing) { |
| 2361 | 3917 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3918 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3919 |
| 12080 | 3920 assert(check_young_list_well_formed(), "young list should be well formed"); |
| 3921 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3922 "sanity check"); | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3923 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3924 // 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
|
3925 // 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
|
3926 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3927 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3928 { // 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
|
3929 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3930 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3931 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3932 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
|
3933 increment_gc_time_stamp(); |
| 342 | 3934 |
|
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
|
3935 verify_before_gc(); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
3936 check_bitmaps("GC Start"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3937 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3938 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3939 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3940 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3941 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3942 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3943 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3944 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3945 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3946 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3947 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3948 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3949 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3950 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3951 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3952 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3953 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3954 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3955 // 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
|
3956 // of the collection set!). |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3957 _allocator->release_mutator_alloc_region(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3958 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3959 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3960 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3961 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3962 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3963 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3964 // 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
|
3965 // 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
|
3966 // 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
|
3967 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3968 // 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
|
3969 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3970 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3971 // 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
|
3972 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3973 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3974 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3975 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3976 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3977 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
|
3978 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3979 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
3980 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
|
3981 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3982 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3983 // 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
|
3984 // 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
|
3985 // 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
|
3986 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3987 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
|
3988 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3989 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3990 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
|
3991 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
|
3992 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3993 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
|
3994 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3995 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3996 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3998 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3999 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4000 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4001 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4002 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4003 |
|
1394
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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|
4004 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4005 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4006 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4007 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
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parents:
1391
diff
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|
4008 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
4009 |
| 10405 | 4010 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4011 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4012 register_humongous_regions_with_in_cset_fast_test(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4013 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4014 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4015 // 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
|
4016 // 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
|
4017 // 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
|
4018 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4019 _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
|
4020 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4021 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4022 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4023 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4027 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4028 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4029 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4030 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4032 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4033 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4034 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4035 #endif // ASSERT |
| 1707 | 4036 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4037 setup_surviving_young_words(); |
|
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 // Initialize the GC alloc regions. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4040 _allocator->init_gc_alloc_regions(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 // Actually do the work... |
| 10405 | 4043 evacuate_collection_set(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4044 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4045 // 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
|
4046 // (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
|
4047 // 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
|
4048 // 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
|
4049 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4050 _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
|
4051 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4052 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4053 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4054 |
| 10405 | 4055 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4056 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4057 eagerly_reclaim_humongous_regions(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4058 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4059 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4060 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4061 cleanup_surviving_young_words(); |
|
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 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4065 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4066 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4067 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4068 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4069 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4070 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4071 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4072 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4073 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4074 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4075 "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
|
4076 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4077 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4078 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4080 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4081 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4082 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
| 10405 | 4083 _young_list->first_survivor_region(), |
| 4084 _young_list->last_survivor_region()); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4087 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4088 if (evacuation_failed()) { |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4089 _allocator->set_used(recalculate_used()); |
| 10405 | 4090 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
| 4091 for (uint i = 0; i < n_queues; i++) { | |
| 4092 if (_evacuation_failed_info_array[i].has_failed()) { | |
| 4093 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
| 4094 } | |
| 4095 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4096 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4097 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4098 // when they were freed. Add in the bytes evacuated. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4099 _allocator->increase_used(g1_policy()->bytes_copied_during_gc()); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4100 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4101 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4103 // 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
|
4104 // 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
|
4105 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4106 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4107 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4108 // 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
|
4109 // 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
|
4110 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4111 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4112 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4113 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4114 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4115 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4117 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4118 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
|
4119 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4120 |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4121 _allocator->init_mutator_alloc_region(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 size_t bytes_before = capacity(); |
| 4785 | 4127 // No need for an ergo verbose message here, |
| 4128 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 if (!expand(expand_bytes)) { |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
4130 // 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
|
4131 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4132 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4133 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4134 |
| 10405 | 4135 // 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
|
4136 // 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
|
4137 _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
|
4138 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4139 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4140 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4141 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4142 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4143 // 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
|
4144 // 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
|
4145 // 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
|
4146 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
|
4147 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
| 10405 | 4148 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
|
4149 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4150 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4151 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4152 // 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
|
4153 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4155 // 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
|
4156 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4160 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 // 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
|
4164 // 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
|
4165 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 // 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
|
4167 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4173 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4174 |
|
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
|
4175 verify_after_gc(); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
4176 check_bitmaps("GC End"); |
|
3979
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 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4179 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4180 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4181 // 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
|
4182 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4183 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4184 // 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
|
4185 // 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
|
4186 // 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
|
4187 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4188 _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
|
4189 |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4190 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4191 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4192 #endif |
| 342 | 4193 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4194 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4195 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4196 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4197 // 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
|
4198 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
|
4199 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4200 // 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
|
4201 // 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
|
4202 // 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
|
4203 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4204 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
4205 _hrm.verify_optional(); |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4206 verify_region_sets_optional(); |
|
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 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
|
4209 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
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 print_heap_after_gc(); |
| 10405 | 4212 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
|
4213 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4214 // 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
|
4215 // 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
|
4216 // 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
|
4217 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4218 g1mm()->update_sizes(); |
| 10405 | 4219 |
| 4220 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
| 4221 _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
|
4222 _gc_timer_stw->register_gc_end(); |
| 10405 | 4223 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
| 4224 } | |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4225 // 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
|
4226 // 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
|
4227 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4228 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4229 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4230 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4231 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4232 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4233 // 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
|
4234 // 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
|
4235 // not start until the safepoint itself is released in |
| 20192 | 4236 // SuspendibleThreadSet::desynchronize(). |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4237 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4238 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4239 |
| 1973 | 4240 return true; |
| 342 | 4241 } |
| 4242 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4243 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4244 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4245 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4246 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4247 case GCAllocForSurvived: |
| 6595 | 4248 gclab_word_size = _survivor_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 case GCAllocForTenured: |
| 6595 | 4251 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4252 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4253 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4254 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4255 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4256 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4257 } |
| 6595 | 4258 |
| 4259 // Prevent humongous PLAB sizes for two reasons: | |
| 4260 // * PLABs are allocated using a similar paths as oops, but should | |
| 4261 // never be in a humongous region | |
| 4262 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4263 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
|
4264 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4265 |
| 342 | 4266 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { |
| 4267 _drain_in_progress = false; | |
| 4268 set_evac_failure_closure(cl); | |
| 6197 | 4269 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4270 } |
| 4271 | |
| 4272 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4273 assert(_evac_failure_scan_stack != NULL && | |
| 4274 _evac_failure_scan_stack->length() == 0, | |
| 4275 "Postcondition"); | |
| 4276 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4277 delete _evac_failure_scan_stack; |
| 342 | 4278 _evac_failure_scan_stack = NULL; |
| 4279 } | |
| 4280 | |
| 4281 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
|
4282 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
|
4283 |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4284 double remove_self_forwards_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4285 |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4286 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4287 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4288 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4289 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4290 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4291 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4292 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4293 rsfp_task.work(0); |
|
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 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4296 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
|
4297 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4298 // 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
|
4299 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4300 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4301 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4302 |
| 4303 // 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
|
4304 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
|
4305 _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
|
4306 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
|
4307 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
|
4308 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
|
4309 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
|
4310 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4311 _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
|
4312 _preserved_marks_of_objs.clear(true); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4313 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4314 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
| 342 | 4315 } |
| 4316 | |
| 4317 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4318 _evac_failure_scan_stack->push(obj); | |
| 4319 } | |
| 4320 | |
| 4321 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4322 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4323 | |
| 4324 while (_evac_failure_scan_stack->length() > 0) { | |
| 4325 oop obj = _evac_failure_scan_stack->pop(); | |
| 4326 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4327 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4328 } | |
| 4329 } | |
| 4330 | |
| 4331 oop | |
| 10405 | 4332 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
|
4333 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
|
4334 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
|
4335 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
|
4336 (HeapWord*) old)); |
| 342 | 4337 markOop m = old->mark(); |
| 4338 oop forward_ptr = old->forward_to_atomic(old); | |
| 4339 if (forward_ptr == NULL) { | |
| 4340 // Forward-to-self succeeded. | |
| 10405 | 4341 assert(_par_scan_state != NULL, "par scan state"); |
| 4342 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
| 4343 uint queue_num = _par_scan_state->queue_num(); | |
| 4344 | |
| 4345 _evacuation_failed = true; | |
| 4346 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
| 342 | 4347 if (_evac_failure_closure != cl) { |
| 4348 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4349 assert(!_drain_in_progress, | |
| 4350 "Should only be true while someone holds the lock."); | |
| 4351 // Set the global evac-failure closure to the current thread's. | |
| 4352 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4353 set_evac_failure_closure(cl); | |
| 4354 // Now do the common part. | |
| 4355 handle_evacuation_failure_common(old, m); | |
| 4356 // Reset to NULL. | |
| 4357 set_evac_failure_closure(NULL); | |
| 4358 } else { | |
| 4359 // The lock is already held, and this is recursive. | |
| 4360 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4361 handle_evacuation_failure_common(old, m); | |
| 4362 } | |
| 4363 return old; | |
| 4364 } 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
|
4365 // 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
|
4366 // 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
|
4367 // 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
|
4368 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
|
4369 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
|
4370 "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
|
4371 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4372 return forward_ptr; |
| 4373 } | |
| 4374 } | |
| 4375 | |
| 4376 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4377 preserve_mark_if_necessary(old, m); | |
| 4378 | |
| 4379 HeapRegion* r = heap_region_containing(old); | |
| 4380 if (!r->evacuation_failed()) { | |
| 4381 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4382 _hr_printer.evac_failure(r); |
| 342 | 4383 } |
| 4384 | |
| 4385 push_on_evac_failure_scan_stack(old); | |
| 4386 | |
| 4387 if (!_drain_in_progress) { | |
| 4388 // prevent recursion in copy_to_survivor_space() | |
| 4389 _drain_in_progress = true; | |
| 4390 drain_evac_failure_scan_stack(); | |
| 4391 _drain_in_progress = false; | |
| 4392 } | |
| 4393 } | |
| 4394 | |
| 4395 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
|
4396 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4397 // 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
|
4398 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4399 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
|
4400 _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
|
4401 _preserved_marks_of_objs.push(m); |
| 342 | 4402 } |
| 4403 } | |
| 4404 | |
| 4405 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4406 size_t word_size, |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4407 AllocationContext_t context) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4408 if (purpose == GCAllocForSurvived) { |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4409 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
|
4410 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4411 return result; |
| 342 | 4412 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4413 // 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
|
4414 // object there. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4415 return old_attempt_allocation(word_size, context); |
| 342 | 4416 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4417 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4418 assert(purpose == GCAllocForTenured, "sanity"); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4419 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
|
4420 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4421 return result; |
| 342 | 4422 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4423 // 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
|
4424 // object there. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4425 return survivor_attempt_allocation(word_size, context); |
| 342 | 4426 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4427 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4428 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4429 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4430 // 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
|
4431 return NULL; |
| 342 | 4432 } |
| 4433 | |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4434 void G1ParCopyHelper::mark_object(oop obj) { |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4435 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
|
4436 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4437 // 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
|
4438 _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
|
4439 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4440 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4441 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
|
4442 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
|
4443 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
|
4444 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
|
4445 |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4446 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
|
4447 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
|
4448 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4449 // 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
|
4450 // 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
|
4451 // 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
|
4452 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4453 _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
|
4454 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4455 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4456 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4457 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
|
4458 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
|
4459 _scanned_klass->record_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4460 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4461 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4462 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4463 template <G1Barrier barrier, G1Mark do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4464 template <class T> |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4465 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
|
4466 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
|
4467 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4468 if (oopDesc::is_null(heap_oop)) { |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4469 return; |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4470 } |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4471 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4472 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
|
4473 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4474 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4475 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4476 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
|
4477 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4478 if (state == G1CollectedHeap::InCSet) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4479 oop forwardee; |
| 526 | 4480 if (obj->is_forwarded()) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4481 forwardee = obj->forwardee(); |
| 526 | 4482 } else { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4483 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
| 342 | 4484 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4485 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
|
4486 oopDesc::encode_store_heap_oop(p, forwardee); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4487 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
|
4488 // 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
|
4489 // 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
|
4490 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4491 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4492 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4493 if (barrier == G1BarrierKlass) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4494 do_klass_barrier(p, forwardee); |
| 342 | 4495 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4496 } else { |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4497 if (state == G1CollectedHeap::IsHumongous) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4498 _g1->set_humongous_is_live(obj); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4499 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4500 // 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
|
4501 // 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
|
4502 if (do_mark_object == G1MarkFromRoot) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4503 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4504 } |
| 526 | 4505 } |
| 4506 | |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4507 if (barrier == G1BarrierEvac) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4508 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4509 } |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4510 } |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4511 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4512 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
|
4513 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
|
4514 |
| 342 | 4515 class G1ParEvacuateFollowersClosure : public VoidClosure { |
| 4516 protected: | |
| 4517 G1CollectedHeap* _g1h; | |
| 4518 G1ParScanThreadState* _par_scan_state; | |
| 4519 RefToScanQueueSet* _queues; | |
| 4520 ParallelTaskTerminator* _terminator; | |
| 4521 | |
| 4522 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4523 RefToScanQueueSet* queues() { return _queues; } | |
| 4524 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4525 | |
| 4526 public: | |
| 4527 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4528 G1ParScanThreadState* par_scan_state, | |
| 4529 RefToScanQueueSet* queues, | |
| 4530 ParallelTaskTerminator* terminator) | |
| 4531 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4532 _queues(queues), _terminator(terminator) {} | |
| 4533 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4534 void do_void(); |
|
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 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4537 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4538 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4539 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4540 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4541 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4542 pss->start_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4543 const bool res = terminator()->offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4544 pss->end_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4545 return res; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4546 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4547 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4548 void G1ParEvacuateFollowersClosure::do_void() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4549 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4550 pss->trim_queue(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4551 do { |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4552 pss->steal_and_trim_queue(queues()); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4553 } while (!offer_termination()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4554 } |
| 342 | 4555 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4556 class G1KlassScanClosure : public KlassClosure { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4557 G1ParCopyHelper* _closure; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4558 bool _process_only_dirty; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4559 int _count; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4560 public: |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4561 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4562 : _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
|
4563 void do_klass(Klass* klass) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4564 // 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
|
4565 // 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
|
4566 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4567 // 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
|
4568 klass->clear_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4569 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4570 // 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
|
4571 // 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
|
4572 _closure->set_scanned_klass(klass); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4573 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4574 klass->oops_do(_closure); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4575 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4576 _closure->set_scanned_klass(NULL); |
|
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 _count++; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4579 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4580 }; |
|
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|
4581 |
| 20494 | 4582 class G1CodeBlobClosure : public CodeBlobClosure { |
| 4583 class HeapRegionGatheringOopClosure : public OopClosure { | |
| 4584 G1CollectedHeap* _g1h; | |
| 4585 OopClosure* _work; | |
| 4586 nmethod* _nm; | |
| 4587 | |
| 4588 template <typename T> | |
| 4589 void do_oop_work(T* p) { | |
| 4590 _work->do_oop(p); | |
| 4591 T oop_or_narrowoop = oopDesc::load_heap_oop(p); | |
| 4592 if (!oopDesc::is_null(oop_or_narrowoop)) { | |
| 4593 oop o = oopDesc::decode_heap_oop_not_null(oop_or_narrowoop); | |
| 4594 HeapRegion* hr = _g1h->heap_region_containing_raw(o); | |
| 4595 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"); | |
| 4596 hr->add_strong_code_root(_nm); | |
| 4597 } | |
| 4598 } | |
| 4599 | |
| 4600 public: | |
| 4601 HeapRegionGatheringOopClosure(OopClosure* oc) : _g1h(G1CollectedHeap::heap()), _work(oc), _nm(NULL) {} | |
| 4602 | |
| 4603 void do_oop(oop* o) { | |
| 4604 do_oop_work(o); | |
| 4605 } | |
| 4606 | |
| 4607 void do_oop(narrowOop* o) { | |
| 4608 do_oop_work(o); | |
| 4609 } | |
| 4610 | |
| 4611 void set_nm(nmethod* nm) { | |
| 4612 _nm = nm; | |
| 4613 } | |
| 4614 }; | |
| 4615 | |
| 4616 HeapRegionGatheringOopClosure _oc; | |
| 4617 public: | |
| 4618 G1CodeBlobClosure(OopClosure* oc) : _oc(oc) {} | |
| 4619 | |
| 4620 void do_code_blob(CodeBlob* cb) { | |
| 4621 nmethod* nm = cb->as_nmethod_or_null(); | |
| 4622 if (nm != NULL) { | |
| 4623 if (!nm->test_set_oops_do_mark()) { | |
| 4624 _oc.set_nm(nm); | |
| 4625 nm->oops_do(&_oc); | |
| 4626 nm->fix_oop_relocations(); | |
| 4627 } | |
| 4628 } | |
| 4629 } | |
| 4630 }; | |
| 4631 | |
| 342 | 4632 class G1ParTask : public AbstractGangTask { |
| 4633 protected: | |
| 4634 G1CollectedHeap* _g1h; | |
| 4635 RefToScanQueueSet *_queues; | |
| 4636 ParallelTaskTerminator _terminator; | |
|
4728
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|
4637 uint _n_workers; |
| 342 | 4638 |
| 4639 Mutex _stats_lock; | |
| 4640 Mutex* stats_lock() { return &_stats_lock; } | |
| 4641 | |
| 4642 public: | |
|
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|
4643 G1ParTask(G1CollectedHeap* g1h, RefToScanQueueSet *task_queues) |
| 342 | 4644 : AbstractGangTask("G1 collection"), |
| 4645 _g1h(g1h), | |
| 4646 _queues(task_queues), | |
|
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|
4647 _terminator(0, _queues), |
|
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|
4648 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4649 {} |
| 4650 | |
| 4651 RefToScanQueueSet* queues() { return _queues; } | |
| 4652 | |
| 4653 RefToScanQueue *work_queue(int i) { | |
| 4654 return queues()->queue(i); | |
| 4655 } | |
| 4656 | |
|
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|
4657 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
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|
4658 |
|
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|
4659 virtual void set_for_termination(int active_workers) { |
|
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|
4660 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
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|
4661 // in the young space (_par_seq_tasks) in the G1 heap |
|
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|
4662 // for SequentialSubTasksDone. |
|
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4663 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
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|
4664 // both of which need setting by set_n_termination(). |
|
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|
4665 _g1h->SharedHeap::set_n_termination(active_workers); |
|
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|
4666 _g1h->set_n_termination(active_workers); |
|
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|
4667 terminator()->reset_for_reuse(active_workers); |
|
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|
4668 _n_workers = active_workers; |
|
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|
4669 } |
|
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|
4670 |
|
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|
4671 // Helps out with CLD processing. |
|
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|
4672 // |
|
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|
4673 // During InitialMark we need to: |
|
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|
4674 // 1) Scavenge all CLDs for the young GC. |
|
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|
4675 // 2) Mark all objects directly reachable from strong CLDs. |
|
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|
4676 template <G1Mark do_mark_object> |
|
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|
4677 class G1CLDClosure : public CLDClosure { |
|
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|
4678 G1ParCopyClosure<G1BarrierNone, do_mark_object>* _oop_closure; |
|
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|
4679 G1ParCopyClosure<G1BarrierKlass, do_mark_object> _oop_in_klass_closure; |
|
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|
4680 G1KlassScanClosure _klass_in_cld_closure; |
|
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|
4681 bool _claim; |
|
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|
4682 |
|
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|
4683 public: |
|
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changeset
|
4684 G1CLDClosure(G1ParCopyClosure<G1BarrierNone, do_mark_object>* oop_closure, |
|
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|
4685 bool only_young, bool claim) |
|
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|
4686 : _oop_closure(oop_closure), |
|
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changeset
|
4687 _oop_in_klass_closure(oop_closure->g1(), |
|
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changeset
|
4688 oop_closure->pss(), |
|
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changeset
|
4689 oop_closure->rp()), |
|
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|
4690 _klass_in_cld_closure(&_oop_in_klass_closure, only_young), |
|
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|
4691 _claim(claim) { |
|
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|
4692 |
|
2c6ef90f030a
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|
4693 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
4694 |
|
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changeset
|
4695 void do_cld(ClassLoaderData* cld) { |
|
2c6ef90f030a
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changeset
|
4696 cld->oops_do(_oop_closure, &_klass_in_cld_closure, _claim); |
|
2c6ef90f030a
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|
4697 } |
|
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|
4698 }; |
|
2c6ef90f030a
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|
4699 |
|
4728
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diff
changeset
|
4700 void work(uint worker_id) { |
|
441e946dc1af
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diff
changeset
|
4701 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 4702 |
| 4703 double start_time_ms = os::elapsedTime() * 1000.0; | |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4704 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 4705 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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diff
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|
4706 { |
|
500023bd0818
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changeset
|
4707 ResourceMark rm; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4708 HandleMark hm; |
|
500023bd0818
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diff
changeset
|
4709 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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changeset
|
4710 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
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|
4711 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4712 G1ParScanThreadState pss(_g1h, worker_id, rp); |
|
5986
500023bd0818
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5963
diff
changeset
|
4713 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
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17758
diff
changeset
|
4714 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4715 pss.set_evac_failure_closure(&evac_failure_cl); |
|
500023bd0818
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diff
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|
4716 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4717 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
4718 |
|
2c6ef90f030a
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|
4719 // Non-IM young GC. |
|
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changeset
|
4720 G1ParCopyClosure<G1BarrierNone, G1MarkNone> scan_only_root_cl(_g1h, &pss, rp); |
|
2c6ef90f030a
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|
4721 G1CLDClosure<G1MarkNone> scan_only_cld_cl(&scan_only_root_cl, |
|
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changeset
|
4722 only_young, // Only process dirty klasses. |
|
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|
4723 false); // No need to claim CLDs. |
|
2c6ef90f030a
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diff
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|
4724 // IM young GC. |
|
2c6ef90f030a
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changeset
|
4725 // Strong roots closures. |
|
2c6ef90f030a
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changeset
|
4726 G1ParCopyClosure<G1BarrierNone, G1MarkFromRoot> scan_mark_root_cl(_g1h, &pss, rp); |
|
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changeset
|
4727 G1CLDClosure<G1MarkFromRoot> scan_mark_cld_cl(&scan_mark_root_cl, |
|
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changeset
|
4728 false, // Process all klasses. |
|
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changeset
|
4729 true); // Need to claim CLDs. |
|
2c6ef90f030a
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diff
changeset
|
4730 // Weak roots closures. |
|
2c6ef90f030a
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changeset
|
4731 G1ParCopyClosure<G1BarrierNone, G1MarkPromotedFromRoot> scan_mark_weak_root_cl(_g1h, &pss, rp); |
|
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|
4732 G1CLDClosure<G1MarkPromotedFromRoot> scan_mark_weak_cld_cl(&scan_mark_weak_root_cl, |
|
2c6ef90f030a
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|
4733 false, // Process all klasses. |
|
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changeset
|
4734 true); // Need to claim CLDs. |
|
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|
4735 |
|
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|
4736 G1CodeBlobClosure scan_only_code_cl(&scan_only_root_cl); |
|
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|
4737 G1CodeBlobClosure scan_mark_code_cl(&scan_mark_root_cl); |
|
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changeset
|
4738 // IM Weak code roots are handled later. |
|
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diff
changeset
|
4739 |
|
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changeset
|
4740 OopClosure* strong_root_cl; |
|
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changeset
|
4741 OopClosure* weak_root_cl; |
|
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|
4742 CLDClosure* strong_cld_cl; |
|
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changeset
|
4743 CLDClosure* weak_cld_cl; |
|
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|
4744 CodeBlobClosure* strong_code_cl; |
|
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|
4745 |
|
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|
4746 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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changeset
|
4747 // We also need to mark copied objects. |
|
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changeset
|
4748 strong_root_cl = &scan_mark_root_cl; |
|
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changeset
|
4749 strong_cld_cl = &scan_mark_cld_cl; |
|
2c6ef90f030a
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changeset
|
4750 strong_code_cl = &scan_mark_code_cl; |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
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20279
diff
changeset
|
4751 if (ClassUnloadingWithConcurrentMark) { |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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|
4752 weak_root_cl = &scan_mark_weak_root_cl; |
|
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8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
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|
4753 weak_cld_cl = &scan_mark_weak_cld_cl; |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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20279
diff
changeset
|
4754 } else { |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
changeset
|
4755 weak_root_cl = &scan_mark_root_cl; |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
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|
4756 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
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|
4757 } |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4758 } else { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4759 strong_root_cl = &scan_only_root_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4760 weak_root_cl = &scan_only_root_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4761 strong_cld_cl = &scan_only_cld_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4762 weak_cld_cl = &scan_only_cld_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4763 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
|
4764 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4765 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4766 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4767 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4768 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4769 pss.start_strong_roots(); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4770 _g1h->g1_process_roots(strong_root_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4771 weak_root_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4772 &push_heap_rs_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4773 strong_cld_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4774 weak_cld_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4775 strong_code_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4776 worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4777 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4778 pss.end_strong_roots(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4779 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4780 { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4781 double start = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4782 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4783 evac.do_void(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4784 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
|
4785 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
|
4786 _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
|
4787 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4788 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4789 _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
|
4790 _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
|
4791 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4792 if (ParallelGCVerbose) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4793 MutexLocker x(stats_lock()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4794 pss.print_termination_stats(worker_id); |
|
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 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4797 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
|
4798 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4799 // 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
|
4800 // 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
|
4801 // "GC Worker Time". |
| 342 | 4802 } |
| 4803 | |
| 1611 | 4804 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
|
4805 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 4806 } |
| 4807 }; | |
| 4808 | |
| 4809 // *** Common G1 Evacuation Stuff | |
| 4810 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4811 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4812 |
| 342 | 4813 void |
| 4814 G1CollectedHeap:: | |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4815 g1_process_roots(OopClosure* scan_non_heap_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4816 OopClosure* scan_non_heap_weak_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4817 OopsInHeapRegionClosure* scan_rs, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4818 CLDClosure* scan_strong_clds, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4819 CLDClosure* scan_weak_clds, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4820 CodeBlobClosure* scan_strong_code, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4821 uint worker_i) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4822 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4823 // First scan the shared roots. |
| 342 | 4824 double ext_roots_start = os::elapsedTime(); |
| 4825 double closure_app_time_sec = 0.0; | |
| 4826 | |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4827 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
|
4828 bool trace_metadata = during_im && ClassUnloadingWithConcurrentMark; |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4829 |
| 342 | 4830 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
|
4831 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
|
4832 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4833 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
|
4834 SharedHeap::SO_None, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4835 &buf_scan_non_heap_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4836 &buf_scan_non_heap_weak_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4837 scan_strong_clds, |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4838 // 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
|
4839 (trace_metadata ? NULL : scan_weak_clds), |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4840 scan_strong_code); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4841 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4842 // 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
|
4843 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
|
4844 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4845 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4846 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4847 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4848 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
|
4849 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4850 |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4851 if (trace_metadata) { |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4852 // Barrier to make sure all workers passed |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4853 // the strong CLD and strong nmethods phases. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4854 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
|
4855 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4856 // Now take the complement of the strong CLDs. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4857 ClassLoaderDataGraph::roots_cld_do(NULL, scan_weak_clds); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4858 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4859 |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4860 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 4861 buf_scan_non_heap_roots.done(); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4862 buf_scan_non_heap_weak_roots.done(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4863 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4864 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
|
4865 + 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
|
4866 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4867 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
|
4868 |
| 342 | 4869 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
|
4870 ((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
|
4871 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4872 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 4873 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4874 // 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
|
4875 // 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
|
4876 // 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
|
4877 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4878 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
|
4879 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
|
4880 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
|
4881 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4882 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
|
4883 |
|
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
|
4884 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
|
4885 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4886 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4887 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 4888 |
| 4889 // Now scan the complement of the collection set. | |
| 20494 | 4890 G1CodeBlobClosure scavenge_cs_nmethods(scan_non_heap_weak_roots); |
|
20278
2c6ef90f030a
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changeset
|
4891 |
|
2c6ef90f030a
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parents:
20274
diff
changeset
|
4892 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
|
4893 |
| 342 | 4894 _process_strong_tasks->all_tasks_completed(); |
| 4895 } | |
| 4896 | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
4897 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
|
5a32d2a3cc1e
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|
4898 private: |
|
5a32d2a3cc1e
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diff
changeset
|
4899 BoolObjectClosure* _is_alive; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
4900 int _initial_string_table_size; |
|
5a32d2a3cc1e
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diff
changeset
|
4901 int _initial_symbol_table_size; |
|
5a32d2a3cc1e
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diff
changeset
|
4902 |
|
5a32d2a3cc1e
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diff
changeset
|
4903 bool _process_strings; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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changeset
|
4904 int _strings_processed; |
|
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diff
changeset
|
4905 int _strings_removed; |
|
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diff
changeset
|
4906 |
|
5a32d2a3cc1e
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diff
changeset
|
4907 bool _process_symbols; |
|
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diff
changeset
|
4908 int _symbols_processed; |
|
5a32d2a3cc1e
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changeset
|
4909 int _symbols_removed; |
|
17652
0eb64cfc0b76
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diff
changeset
|
4910 |
|
0eb64cfc0b76
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|
4911 bool _do_in_parallel; |
|
17634
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diff
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|
4912 public: |
|
5a32d2a3cc1e
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|
4913 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
|
20278
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changeset
|
4914 AbstractGangTask("String/Symbol Unlinking"), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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changeset
|
4915 _is_alive(is_alive), |
|
17652
0eb64cfc0b76
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tschatzl
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17651
diff
changeset
|
4916 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
|
17634
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|
4917 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
|
5a32d2a3cc1e
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|
4918 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
|
5a32d2a3cc1e
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changeset
|
4919 |
|
5a32d2a3cc1e
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diff
changeset
|
4920 _initial_string_table_size = StringTable::the_table()->table_size(); |
|
5a32d2a3cc1e
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|
4921 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
|
5a32d2a3cc1e
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diff
changeset
|
4922 if (process_strings) { |
|
5a32d2a3cc1e
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diff
changeset
|
4923 StringTable::clear_parallel_claimed_index(); |
|
5a32d2a3cc1e
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diff
changeset
|
4924 } |
|
5a32d2a3cc1e
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diff
changeset
|
4925 if (process_symbols) { |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4926 SymbolTable::clear_parallel_claimed_index(); |
|
5a32d2a3cc1e
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tschatzl
parents:
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diff
changeset
|
4927 } |
|
5a32d2a3cc1e
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parents:
13400
diff
changeset
|
4928 } |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
4929 |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
4930 ~G1StringSymbolTableUnlinkTask() { |
|
17652
0eb64cfc0b76
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tschatzl
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17651
diff
changeset
|
4931 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
4932 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
|
5a32d2a3cc1e
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tschatzl
parents:
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diff
changeset
|
4933 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
|
4934 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
|
4935 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4936 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
|
4937 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4938 if (G1TraceStringSymbolTableScrubbing) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4939 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
|
4940 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4941 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4942 strings_processed(), strings_removed(), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4943 symbols_processed(), symbols_removed()); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4944 } |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4945 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4946 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4947 void work(uint worker_id) { |
|
17652
0eb64cfc0b76
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tschatzl
parents:
17651
diff
changeset
|
4948 if (_do_in_parallel) { |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4949 int strings_processed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4950 int strings_removed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4951 int symbols_processed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4952 int symbols_removed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4953 if (_process_strings) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
4954 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
4955 Atomic::add(strings_processed, &_strings_processed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
4956 Atomic::add(strings_removed, &_strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4957 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4958 if (_process_symbols) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
4959 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
4960 Atomic::add(symbols_processed, &_symbols_processed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4961 Atomic::add(symbols_removed, &_symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4962 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4963 } else { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4964 if (_process_strings) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4965 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
4966 } |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4967 if (_process_symbols) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4968 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4969 } |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
4970 } |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4971 } |
|
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 strings_processed() const { return (size_t)_strings_processed; } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
4974 size_t strings_removed() const { return (size_t)_strings_removed; } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
4975 |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4976 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4977 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4978 }; |
|
5a32d2a3cc1e
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13400
diff
changeset
|
4979 |
|
20278
2c6ef90f030a
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changeset
|
4980 class G1CodeCacheUnloadingTask VALUE_OBJ_CLASS_SPEC { |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4981 private: |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4982 static Monitor* _lock; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4983 |
|
2c6ef90f030a
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20274
diff
changeset
|
4984 BoolObjectClosure* const _is_alive; |
|
2c6ef90f030a
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stefank
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changeset
|
4985 const bool _unloading_occurred; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4986 const uint _num_workers; |
|
2c6ef90f030a
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stefank
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changeset
|
4987 |
|
2c6ef90f030a
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20274
diff
changeset
|
4988 // Variables used to claim nmethods. |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4989 nmethod* _first_nmethod; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4990 volatile nmethod* _claimed_nmethod; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4991 |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4992 // The list of nmethods that need to be processed by the second pass. |
|
2c6ef90f030a
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stefank
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changeset
|
4993 volatile nmethod* _postponed_list; |
|
2c6ef90f030a
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changeset
|
4994 volatile uint _num_entered_barrier; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4995 |
|
2c6ef90f030a
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20274
diff
changeset
|
4996 public: |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4997 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
|
4998 _is_alive(is_alive), |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4999 _unloading_occurred(unloading_occurred), |
|
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|
5000 _num_workers(num_workers), |
|
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|
5001 _first_nmethod(NULL), |
|
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|
5002 _claimed_nmethod(NULL), |
|
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|
5003 _postponed_list(NULL), |
|
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|
5004 _num_entered_barrier(0) |
|
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|
5005 { |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5006 nmethod::increase_unloading_clock(); |
|
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|
5007 _first_nmethod = CodeCache::alive_nmethod(CodeCache::first()); |
|
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|
5008 _claimed_nmethod = (volatile nmethod*)_first_nmethod; |
|
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changeset
|
5009 } |
|
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diff
changeset
|
5010 |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
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|
5011 ~G1CodeCacheUnloadingTask() { |
|
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|
5012 CodeCache::verify_clean_inline_caches(); |
|
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|
5013 |
|
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changeset
|
5014 CodeCache::set_needs_cache_clean(false); |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
5015 guarantee(CodeCache::scavenge_root_nmethods() == NULL, "Must be"); |
|
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|
5016 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5017 CodeCache::verify_icholder_relocations(); |
|
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|
5018 } |
|
2c6ef90f030a
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diff
changeset
|
5019 |
|
2c6ef90f030a
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changeset
|
5020 private: |
|
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changeset
|
5021 void add_to_postponed_list(nmethod* nm) { |
|
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|
5022 nmethod* old; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5023 do { |
|
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diff
changeset
|
5024 old = (nmethod*)_postponed_list; |
|
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changeset
|
5025 nm->set_unloading_next(old); |
|
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|
5026 } while ((nmethod*)Atomic::cmpxchg_ptr(nm, &_postponed_list, old) != old); |
|
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changeset
|
5027 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5028 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5029 void clean_nmethod(nmethod* nm) { |
|
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changeset
|
5030 bool postponed = nm->do_unloading_parallel(_is_alive, _unloading_occurred); |
|
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changeset
|
5031 |
|
2c6ef90f030a
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diff
changeset
|
5032 if (postponed) { |
|
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changeset
|
5033 // This nmethod referred to an nmethod that has not been cleaned/unloaded yet. |
|
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|
5034 add_to_postponed_list(nm); |
|
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diff
changeset
|
5035 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5036 |
|
2c6ef90f030a
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diff
changeset
|
5037 // Mark that this thread has been cleaned/unloaded. |
|
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changeset
|
5038 // After this call, it will be safe to ask if this nmethod was unloaded or not. |
|
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changeset
|
5039 nm->set_unloading_clock(nmethod::global_unloading_clock()); |
|
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changeset
|
5040 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5041 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5042 void clean_nmethod_postponed(nmethod* nm) { |
|
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changeset
|
5043 nm->do_unloading_parallel_postponed(_is_alive, _unloading_occurred); |
|
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changeset
|
5044 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5045 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5046 static const int MaxClaimNmethods = 16; |
|
2c6ef90f030a
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diff
changeset
|
5047 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5048 void claim_nmethods(nmethod** claimed_nmethods, int *num_claimed_nmethods) { |
|
2c6ef90f030a
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diff
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|
5049 nmethod* first; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5050 nmethod* last; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5051 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5052 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5053 *num_claimed_nmethods = 0; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5054 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
5055 first = last = (nmethod*)_claimed_nmethod; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5056 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5057 if (first != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5058 for (int i = 0; i < MaxClaimNmethods; i++) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5059 last = CodeCache::alive_nmethod(CodeCache::next(last)); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5060 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5061 if (last == NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5062 break; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5063 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5064 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5065 claimed_nmethods[i] = last; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5066 (*num_claimed_nmethods)++; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5067 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
20274
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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20274
diff
changeset
|
5070 } while ((nmethod*)Atomic::cmpxchg_ptr(last, &_claimed_nmethod, first) != first); |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5071 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5072 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5073 nmethod* claim_postponed_nmethod() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5074 nmethod* claim; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5075 nmethod* next; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5076 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5077 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5078 claim = (nmethod*)_postponed_list; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5079 if (claim == NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5080 return NULL; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5081 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5082 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5083 next = claim->unloading_next(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5084 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
5085 } 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
|
5086 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5087 return claim; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5088 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5089 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5090 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5091 // 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
|
5092 void barrier_mark(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5093 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
|
5094 _num_entered_barrier++; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5095 if (_num_entered_barrier == _num_workers) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5096 ml.notify_all(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5097 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5098 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5099 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5100 // 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
|
5101 // 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
|
5102 void barrier_wait(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5103 if (_num_entered_barrier < _num_workers) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5104 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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changeset
|
5105 while (_num_entered_barrier < _num_workers) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5106 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
|
5107 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5108 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5109 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5110 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5111 // Cleaning and unloading of nmethods. Some work has to be postponed |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5112 // to the second pass, when we know which nmethods survive. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5113 void work_first_pass(uint worker_id) { |
|
2c6ef90f030a
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diff
changeset
|
5114 // The first nmethods is claimed by the first worker. |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5115 if (worker_id == 0 && _first_nmethod != NULL) { |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5116 clean_nmethod(_first_nmethod); |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5117 _first_nmethod = NULL; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5118 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5119 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5120 int num_claimed_nmethods; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5121 nmethod* claimed_nmethods[MaxClaimNmethods]; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5122 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5123 while (true) { |
|
2c6ef90f030a
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20274
diff
changeset
|
5124 claim_nmethods(claimed_nmethods, &num_claimed_nmethods); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5125 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5126 if (num_claimed_nmethods == 0) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5127 break; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5128 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5129 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5130 for (int i = 0; i < num_claimed_nmethods; i++) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5131 clean_nmethod(claimed_nmethods[i]); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5132 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5133 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5134 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5135 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5136 void work_second_pass(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5137 nmethod* nm; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5138 // Take care of postponed nmethods. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5139 while ((nm = claim_postponed_nmethod()) != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5140 clean_nmethod_postponed(nm); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5141 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5142 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5143 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5144 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5145 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
|
5146 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5147 class G1KlassCleaningTask : public StackObj { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5148 BoolObjectClosure* _is_alive; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5149 volatile jint _clean_klass_tree_claimed; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5150 ClassLoaderDataGraphKlassIteratorAtomic _klass_iterator; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5151 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5152 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5153 G1KlassCleaningTask(BoolObjectClosure* is_alive) : |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5154 _is_alive(is_alive), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5155 _clean_klass_tree_claimed(0), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5156 _klass_iterator() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5157 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5158 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5159 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5160 bool claim_clean_klass_tree_task() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5161 if (_clean_klass_tree_claimed) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5162 return false; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
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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diff
changeset
|
5165 return Atomic::cmpxchg(1, (jint*)&_clean_klass_tree_claimed, 0) == 0; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5166 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5167 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5168 InstanceKlass* claim_next_klass() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5169 Klass* klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5170 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5171 klass =_klass_iterator.next_klass(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5172 } while (klass != NULL && !klass->oop_is_instance()); |
|
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 return (InstanceKlass*)klass; |
|
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 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5177 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5178 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5179 void clean_klass(InstanceKlass* ik) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5180 ik->clean_implementors_list(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5181 ik->clean_method_data(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5182 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5183 // G1 specific cleanup work that has |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5184 // been moved here to be done in parallel. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5185 ik->clean_dependent_nmethods(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5186 } |
|
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 void work() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5189 ResourceMark rm; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5190 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5191 // One worker will clean the subklass/sibling klass tree. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5192 if (claim_clean_klass_tree_task()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5193 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
|
5194 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5195 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5196 // All workers will help cleaning the classes, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5197 InstanceKlass* klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5198 while ((klass = claim_next_klass()) != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5199 clean_klass(klass); |
|
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 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5202 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5203 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5204 // 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
|
5205 class G1ParallelCleaningTask : public AbstractGangTask { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5206 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5207 G1StringSymbolTableUnlinkTask _string_symbol_task; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5208 G1CodeCacheUnloadingTask _code_cache_task; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5209 G1KlassCleaningTask _klass_cleaning_task; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5210 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5211 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5212 // The constructor is run in the VMThread. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5213 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
|
5214 AbstractGangTask("Parallel Cleaning"), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5215 _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
|
5216 _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
|
5217 _klass_cleaning_task(is_alive) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5218 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5219 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5220 // The parallel work done by all worker threads. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5221 void work(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5222 // Do first pass of code cache cleaning. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5223 _code_cache_task.work_first_pass(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5224 |
| 20279 | 5225 // 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
|
5226 _code_cache_task.barrier_mark(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 // Clean the Strings and Symbols. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5229 _string_symbol_task.work(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 // 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
|
5232 _code_cache_task.barrier_wait(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5233 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5234 // 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
|
5235 // the liveness information gathered during the first pass. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5236 _code_cache_task.work_second_pass(worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5237 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5238 // Clean all klasses that were not unloaded. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5239 _klass_cleaning_task.work(); |
|
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
parents:
20274
diff
changeset
|
5241 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5242 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5243 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5244 void G1CollectedHeap::parallel_cleaning(BoolObjectClosure* is_alive, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5245 bool process_strings, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5246 bool process_symbols, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5247 bool class_unloading_occurred) { |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5248 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
|
5249 workers()->active_workers() : 1); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5250 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5251 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
|
5252 n_workers, class_unloading_occurred); |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5253 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5254 set_par_threads(n_workers); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5255 workers()->run_task(&g1_unlink_task); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5256 set_par_threads(0); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5257 } else { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5258 g1_unlink_task.work(0); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5259 } |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5260 } |
|
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 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
|
5263 bool process_strings, bool process_symbols) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5264 { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5265 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5266 _g1h->workers()->active_workers() : 1); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5267 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
|
5268 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5269 set_par_threads(n_workers); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5270 workers()->run_task(&g1_unlink_task); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5271 set_par_threads(0); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5272 } else { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5273 g1_unlink_task.work(0); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5274 } |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5275 } |
| 17764 | 5276 |
| 5277 if (G1StringDedup::is_enabled()) { | |
| 5278 G1StringDedup::unlink(is_alive); | |
| 5279 } | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5280 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5281 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5282 class G1RedirtyLoggedCardsTask : public AbstractGangTask { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5283 private: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5284 DirtyCardQueueSet* _queue; |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5285 public: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5286 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
|
5287 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5288 virtual void work(uint worker_id) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5289 double start_time = os::elapsedTime(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5290 |
|
20217
6b52700a896b
8040002: Clean up code and code duplication in re-diryting cards for verification
tschatzl
parents:
20216
diff
changeset
|
5291 RedirtyLoggedCardTableEntryClosure cl; |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5292 if (G1CollectedHeap::heap()->use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5293 _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
|
5294 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5295 _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
|
5296 } |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5297 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5298 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
|
5299 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
|
5300 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
|
5301 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5302 }; |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5303 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5304 void G1CollectedHeap::redirty_logged_cards() { |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5305 double redirty_logged_cards_start = os::elapsedTime(); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5306 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5307 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5308 _g1h->workers()->active_workers() : 1); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5309 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5310 G1RedirtyLoggedCardsTask redirty_task(&dirty_card_queue_set()); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5311 dirty_card_queue_set().reset_for_par_iteration(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5312 if (use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5313 set_par_threads(n_workers); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5314 workers()->run_task(&redirty_task); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5315 set_par_threads(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5316 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5317 redirty_task.work(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5318 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5319 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5320 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5321 dcq.merge_bufferlists(&dirty_card_queue_set()); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5322 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
|
5323 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5324 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
|
5325 } |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5326 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5327 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5328 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5329 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5330 // 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
|
5331 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5332 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5333 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5334 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5335 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5336 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5337 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5338 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5339 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5340 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5341 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5342 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5343 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5345 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5354 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5355 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5356 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5357 void do_oop(oop* p) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5358 oop obj = *p; |
|
20503
fa56205f142c
8057799: Unnecessary NULL check in G1KeepAliveClosure
tonyp
parents:
20494
diff
changeset
|
5359 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
|
5360 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5361 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
|
5362 if (cset_state == G1CollectedHeap::InNeither) { |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5363 return; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5364 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5365 if (cset_state == G1CollectedHeap::InCSet) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5366 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5367 *p = obj->forwardee(); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5368 } else { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5369 assert(!obj->is_forwarded(), "invariant" ); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5370 assert(cset_state == G1CollectedHeap::IsHumongous, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5371 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
|
5372 _g1->set_humongous_is_live(obj); |
|
3979
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 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5375 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5377 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5378 // serial and parallel code as long as different worker |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5379 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5380 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5381 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5382 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5383 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 OopClosure* _copy_non_heap_obj_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5385 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5386 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5387 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5388 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 OopClosure* non_heap_obj_cl, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 G1ParScanThreadState* pss): |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5391 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5394 {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5396 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5399 template <class T> void do_oop_work(T* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5400 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5402 if (_g1h->is_in_cset_or_humongous(obj)) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5403 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5404 // 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
|
5405 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5406 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5407 // heap, update the RSet for 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 referent has not been forwarded then we have to keep |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5410 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5411 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5412 // 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
|
5413 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5414 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5415 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5416 // 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
|
5417 // use the the non-heap or metadata closures directly to copy |
| 10405 | 5418 // the referent object and update the pointer, while avoiding |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5419 // updating the RSet. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5420 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5421 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5422 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 } else { |
|
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17866
diff
changeset
|
5424 assert(!Metaspace::contains((const void*)p), |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5425 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
|
5426 PTR_FORMAT, p)); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5427 _copy_non_heap_obj_cl->do_oop(p); |
|
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 } |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5430 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5431 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5432 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5433 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5434 // closure for each discovered list in some of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5435 // reference processing phases. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5436 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5437 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5438 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5439 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5440 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5442 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5443 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5444 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5448 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5450 void do_void() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5451 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5452 pss->trim_queue(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5453 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5455 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5456 // Parallel Reference Processing closures |
|
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 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5459 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5460 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5461 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5462 private: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5463 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5464 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5465 FlexibleWorkGang* _workers; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5466 int _active_workers; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5467 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5468 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5469 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5470 FlexibleWorkGang* workers, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5471 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5472 int n_workers) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5473 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5474 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5475 _workers(workers), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5476 _active_workers(n_workers) |
|
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 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5479 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5480 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5481 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5482 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5483 virtual void execute(EnqueueTask& task); |
|
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 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5486 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5487 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5488 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5489 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5490 ProcessTask& _proc_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5491 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5492 RefToScanQueueSet *_task_queues; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5493 ParallelTaskTerminator* _terminator; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5494 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5495 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5496 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
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|
5497 G1CollectedHeap* g1h, |
|
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|
5498 RefToScanQueueSet *task_queues, |
|
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|
5499 ParallelTaskTerminator* terminator) : |
|
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|
5500 AbstractGangTask("Process reference objects in parallel"), |
|
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|
5501 _proc_task(proc_task), |
|
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|
5502 _g1h(g1h), |
|
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|
5503 _task_queues(task_queues), |
|
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|
5504 _terminator(terminator) |
|
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|
5505 {} |
|
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|
5506 |
|
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|
5507 virtual void work(uint worker_id) { |
|
3979
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|
5508 // The reference processing task executed by a single worker. |
|
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|
5509 ResourceMark rm; |
|
4dfb2df418f2
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diff
changeset
|
5510 HandleMark hm; |
|
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changeset
|
5511 |
|
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|
5512 G1STWIsAliveClosure is_alive(_g1h); |
|
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|
5513 |
|
17689
5d492d192cbf
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|
5514 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
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|
5515 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
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|
5516 |
|
3979
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|
5517 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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|
5518 |
|
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|
5519 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
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|
5520 |
|
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|
5521 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
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|
5522 |
|
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|
5523 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
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|
5524 |
|
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changeset
|
5525 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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|
5526 // We also need to mark copied objects. |
|
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changeset
|
5527 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
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|
5528 } |
|
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changeset
|
5529 |
|
4dfb2df418f2
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changeset
|
5530 // Keep alive closure. |
|
20270
b7d24d2bc8be
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|
5531 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
|
3979
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|
5532 |
|
4dfb2df418f2
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|
5533 // Complete GC closure |
|
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|
5534 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
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|
5535 |
|
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|
5536 // Call the reference processing task's work routine. |
|
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|
5537 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
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|
5538 |
|
4dfb2df418f2
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|
5539 // Note we cannot assert that the refs array is empty here as not all |
|
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|
5540 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
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|
5541 // the complete_gc closure (which ordinarily would drain the queue) so |
|
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|
5542 // the queue may not be empty. |
|
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parents:
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diff
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|
5543 } |
|
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diff
changeset
|
5544 }; |
|
4dfb2df418f2
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diff
changeset
|
5545 |
|
4dfb2df418f2
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diff
changeset
|
5546 // Driver routine for parallel reference processing. |
|
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diff
changeset
|
5547 // Creates an instance of the ref processing gang |
|
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diff
changeset
|
5548 // task and has the worker threads execute it. |
|
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|
5549 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
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changeset
|
5550 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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diff
changeset
|
5551 |
|
4dfb2df418f2
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diff
changeset
|
5552 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
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changeset
|
5553 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
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changeset
|
5554 |
|
4dfb2df418f2
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diff
changeset
|
5555 _g1h->set_par_threads(_active_workers); |
|
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diff
changeset
|
5556 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
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diff
changeset
|
5557 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5558 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5559 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5560 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5561 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5562 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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|
5563 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
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|
5564 EnqueueTask& _enq_task; |
|
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diff
changeset
|
5565 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5566 public: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5567 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5568 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
|
5569 _enq_task(enq_task) |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5570 { } |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5571 |
|
4728
441e946dc1af
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parents:
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diff
changeset
|
5572 virtual void work(uint worker_id) { |
|
441e946dc1af
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jmasa
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diff
changeset
|
5573 _enq_task.work(worker_id); |
|
3979
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parents:
3973
diff
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|
5574 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5575 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5576 |
| 10405 | 5577 // Driver routine for parallel reference enqueueing. |
|
3979
4dfb2df418f2
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diff
changeset
|
5578 // Creates an instance of the ref enqueueing gang |
|
4dfb2df418f2
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diff
changeset
|
5579 // task and has the worker threads execute it. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5580 |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5581 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5582 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5583 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5584 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5585 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5586 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5587 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5588 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5589 } |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5590 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5591 // End of weak reference support closures |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5592 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5593 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5594 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5595 // objects discovered by the CM ref processor. |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5596 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5597 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5598 protected: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5599 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5600 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5601 ParallelTaskTerminator _terminator; |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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changeset
|
5602 uint _n_workers; |
|
3979
4dfb2df418f2
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diff
changeset
|
5603 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5604 public: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5605 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
|
5606 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5607 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5608 _queues(task_queues), |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5609 _terminator(workers, _queues), |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5610 _n_workers(workers) |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5611 { } |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5612 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5613 void work(uint worker_id) { |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5614 ResourceMark rm; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5615 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5616 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5617 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5618 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5619 |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5620 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
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diff
changeset
|
5621 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5622 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
|
5623 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5624 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5625 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5626 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5627 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5628 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5629 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5630 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5631 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5632 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5633 } |
|
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 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5636 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5637 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5638 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5639 // to be copied. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5640 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5641 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5642 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5643 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5644 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
|
5645 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5646 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5647 // 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
|
5648 // 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
|
5649 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5650 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5651 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5652 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5653 // 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
|
5654 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5655 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5656 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5657 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5658 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5659 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5660 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5661 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5662 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5663 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5665 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5666 iter.make_referent_alive(); |
|
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 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5669 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5671 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5672 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5673 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5674 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5675 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5676 assert(pss.queue_is_empty(), "should be"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5677 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5678 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5679 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5680 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5681 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5682 double ref_proc_start = os::elapsedTime(); |
|
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 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5685 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5686 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5687 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5688 // 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
|
5689 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5690 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5691 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 // 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
|
5693 // 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
|
5694 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5695 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5696 // but would not have treated the reference object as a regular oop. |
| 10405 | 5697 // 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
|
5698 // referent object. |
|
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 need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5701 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 // 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
|
5704 // 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
|
5705 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 |
| 4711 | 5708 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5709 no_of_gc_workers == workers()->active_workers(), |
| 5710 "Need to reset active GC workers"); | |
| 5711 | |
| 5712 set_par_threads(no_of_gc_workers); | |
| 5713 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5714 no_of_gc_workers, | |
| 5715 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5716 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5717 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5718 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5719 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 keep_cm_referents.work(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 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 set_par_threads(0); |
|
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 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5727 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5728 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5729 // 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
|
5730 // 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
|
5731 // JNI refs. |
|
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 // Use only a single queue for this PSS. |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5734 G1ParScanThreadState pss(this, 0, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5735 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5736 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5737 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5738 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5739 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5740 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5741 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5743 assert(pss.queue_is_empty(), "pre-condition"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5744 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5745 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5746 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5747 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5748 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5749 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5750 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5751 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5752 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5753 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5754 } |
|
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 // Keep alive closure. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5757 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, &pss); |
|
3979
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 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5760 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5761 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5762 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5763 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5764 |
| 10405 | 5765 ReferenceProcessorStats stats; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5766 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5767 // Serial reference processing... |
| 10405 | 5768 stats = rp->process_discovered_references(&is_alive, |
| 5769 &keep_alive, | |
| 5770 &drain_queue, | |
| 5771 NULL, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5772 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5773 _gc_tracer_stw->gc_id()); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5774 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5775 // Parallel reference processing |
| 6819 | 5776 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5777 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5778 | |
| 5779 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
| 10405 | 5780 stats = rp->process_discovered_references(&is_alive, |
| 5781 &keep_alive, | |
| 5782 &drain_queue, | |
| 5783 &par_task_executor, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5784 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5785 _gc_tracer_stw->gc_id()); |
| 10405 | 5786 } |
| 5787 | |
| 5788 _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
|
5789 |
|
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5790 // We have completed copying any necessary live referent objects. |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5791 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
|
5792 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5793 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
|
5794 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
|
5795 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5796 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5797 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5798 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5799 double ref_enq_start = os::elapsedTime(); |
|
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 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5802 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
|
5803 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5804 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5805 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5806 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5807 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5808 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5809 } else { |
| 10405 | 5810 // Parallel reference enqueueing |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5811 |
| 6819 | 5812 assert(no_of_gc_workers == workers()->active_workers(), |
| 5813 "Need to reset active workers"); | |
| 5814 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5815 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5816 | |
| 5817 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
|
5818 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5819 } |
|
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 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5822 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5823 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5824 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5825 // 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
|
5826 // Should we do that here also? We could, but it is a serial operation |
| 10405 | 5827 // and could significantly increase the pause time. |
|
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 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
|
5830 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
|
5831 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5832 |
| 10405 | 5833 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
|
5834 _expand_heap_after_alloc_failure = true; |
| 10405 | 5835 _evacuation_failed = false; |
| 342 | 5836 |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5837 // 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
|
5838 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
|
5839 |
| 342 | 5840 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
|
5841 |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5842 // Disable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5843 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
|
5844 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
|
5845 hot_card_cache->set_use_cache(false); |
| 889 | 5846 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5847 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5848 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5849 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5850 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5851 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5852 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5853 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5854 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5855 "If not dynamic should be using all the workers"); |
| 4711 | 5856 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5857 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5858 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5859 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5860 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5861 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5862 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5863 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5864 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5865 |
| 5866 init_for_evac_failure(NULL); | |
| 5867 | |
| 5868 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
|
5869 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5870 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
|
5871 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5872 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5873 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5874 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5875 StrongRootsScope srs(this); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5876 // 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
|
5877 if (g1_policy()->during_initial_mark_pause()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5878 ClassLoaderDataGraph::clear_claimed_marks(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5879 } |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5880 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5881 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5882 // 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
|
5883 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5884 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5885 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5886 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5887 "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
|
5888 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5889 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5890 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
|
5891 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5892 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5893 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5894 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5895 // 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
|
5896 // 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
|
5897 // 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
|
5898 // 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
|
5899 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5900 } |
|
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 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
|
5903 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
|
5904 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5905 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5906 (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
|
5907 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
|
5908 |
| 342 | 5909 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5910 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5911 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5912 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5913 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5914 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5915 // not copied during the pause. |
| 6819 | 5916 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5917 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5918 // Weak root processing. |
| 342 | 5919 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5920 G1STWIsAliveClosure is_alive(this); |
| 342 | 5921 G1KeepAliveClosure keep_alive(this); |
| 5922 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 17764 | 5923 if (G1StringDedup::is_enabled()) { |
| 5924 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
| 5925 } | |
| 342 | 5926 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5927 |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
5928 _allocator->release_gc_alloc_regions(n_workers, evacuation_info); |
| 342 | 5929 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
|
5930 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5931 // 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
|
5932 // 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
|
5933 // 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
|
5934 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
|
5935 hot_card_cache->set_use_cache(true); |
| 342 | 5936 |
|
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5937 purge_code_root_memory(); |
|
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5938 |
| 12080 | 5939 if (g1_policy()->during_initial_mark_pause()) { |
| 5940 // Reset the claim values set during marking the strong code roots | |
| 5941 reset_heap_region_claim_values(); | |
| 5942 } | |
| 5943 | |
| 342 | 5944 finalize_for_evac_failure(); |
| 5945 | |
| 5946 if (evacuation_failed()) { | |
| 5947 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5948 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5949 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5950 // 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
|
5951 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5952 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 5953 } |
| 5954 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5955 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5956 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5957 // this after the card table is cleaned (and verified) as |
| 10405 | 5958 // the act of enqueueing entries on to the pending list |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5959 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5960 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5961 // RSets. |
| 6819 | 5962 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5963 |
|
20504
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
5964 redirty_logged_cards(); |
| 342 | 5965 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5966 } | |
| 5967 | |
| 2152 | 5968 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5969 FreeRegionList* free_list, | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5970 bool par, |
|
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5971 bool locked) { |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
5972 assert(!hr->is_free(), "the region should not be free"); |
| 2152 | 5973 assert(!hr->is_empty(), "the region should not be empty"); |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
5974 assert(_hrm.is_available(hr->hrm_index()), "region should be committed"); |
| 2152 | 5975 assert(free_list != NULL, "pre-condition"); |
| 5976 | |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5977 if (G1VerifyBitmaps) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5978 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
|
5979 concurrent_mark()->clearRangePrevBitmap(mr); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5980 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5981 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5982 // 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
|
5983 // 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
|
5984 // (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
|
5985 if (!hr->is_young()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5986 _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
|
5987 } |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5988 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
|
5989 free_list->add_ordered(hr); |
| 2152 | 5990 } |
| 5991 | |
| 5992 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5993 FreeRegionList* free_list, | |
| 5994 bool par) { | |
| 5995 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 5996 assert(free_list != NULL, "pre-condition"); | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5997 |
| 2152 | 5998 size_t hr_capacity = hr->capacity(); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5999 // 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
|
6000 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6001 uint last_index = hr->last_hc_index(); |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6002 hr->clear_humongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6003 free_region(hr, free_list, par); |
| 2152 | 6004 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6005 uint i = hr->hrm_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6006 while (i < last_index) { |
| 3766 | 6007 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6008 assert(curr_hr->continuesHumongous(), "invariant"); |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6009 curr_hr->clear_humongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6010 free_region(curr_hr, free_list, par); |
| 2152 | 6011 i += 1; |
| 6012 } | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6013 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6014 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6015 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6016 const HeapRegionSetCount& humongous_regions_removed) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6017 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6018 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6019 _old_set.bulk_remove(old_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6020 _humongous_set.bulk_remove(humongous_regions_removed); |
|
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 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6023 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6024 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6025 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6026 assert(list != NULL, "list can't be null"); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6027 if (!list->is_empty()) { |
| 2152 | 6028 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6029 _hrm.insert_list_into_free_list(list); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6030 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6031 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6032 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6033 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6034 _allocator->decrease_used(bytes); |
| 342 | 6035 } |
| 6036 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6037 class G1ParCleanupCTTask : public AbstractGangTask { |
| 12343 | 6038 G1SATBCardTableModRefBS* _ct_bs; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6039 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6040 HeapRegion* volatile _su_head; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6041 public: |
| 12343 | 6042 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6043 G1CollectedHeap* g1h) : |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6044 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
|
6045 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6046 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6047 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6048 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6049 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6050 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6051 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6052 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6053 |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6054 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
|
6055 // 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
|
6056 if (!r->is_survivor()) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6057 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6058 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6059 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6060 }; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6061 |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6062 #ifndef PRODUCT |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6063 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
|
6064 G1CollectedHeap* _g1h; |
| 12343 | 6065 G1SATBCardTableModRefBS* _ct_bs; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6066 public: |
| 12343 | 6067 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
|
6068 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6069 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
|
6070 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
|
6071 _g1h->verify_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6072 } else { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6073 _g1h->verify_not_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6074 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6075 return false; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6076 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6077 }; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6078 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6079 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
|
6080 // All of the region should be clean. |
| 12343 | 6081 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
|
6082 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
|
6083 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
|
6084 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6085 |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6086 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6087 // 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
|
6088 // 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
|
6089 // 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
|
6090 // 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
|
6091 // 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
|
6092 // 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
|
6093 // is dirty. |
| 12343 | 6094 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
|
6095 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
|
6096 if (hr->is_young()) { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6097 ct_bs->verify_g1_young_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6098 } else { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6099 ct_bs->verify_dirty_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6100 } |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6101 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6102 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6103 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
| 12343 | 6104 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6105 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
|
6106 verify_dirty_region(hr); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6107 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6108 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6109 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6110 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6111 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6112 } |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6113 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6114 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
|
6115 HeapWord* tams, HeapWord* end) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6116 guarantee(tams <= end, |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6117 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
|
6118 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
|
6119 if (result < end) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6120 gclog_or_tty->cr(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6121 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
|
6122 bitmap_name, result); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6123 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
|
6124 bitmap_name, tams, end); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6125 return false; |
|
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 return true; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6128 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6129 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6130 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
|
6131 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
|
6132 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
|
6133 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6134 HeapWord* bottom = hr->bottom(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6135 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
|
6136 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
|
6137 HeapWord* end = hr->end(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6138 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6139 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
|
6140 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6141 bool res_n = true; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6142 // 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
|
6143 // 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
|
6144 // 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
|
6145 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
|
6146 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
|
6147 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6148 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
|
6149 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
|
6150 HR_FORMAT_PARAMS(hr)); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6151 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
|
6152 return false; |
|
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 return true; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6155 } |
|
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 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
|
6158 if (!G1VerifyBitmaps) return; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6159 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6160 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
|
6161 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6162 |
|
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|
6163 class G1VerifyBitmapClosure : public HeapRegionClosure { |
|
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|
6164 private: |
|
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|
6165 const char* _caller; |
|
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|
6166 G1CollectedHeap* _g1h; |
|
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|
6167 bool _failures; |
|
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|
6168 |
|
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|
6169 public: |
|
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|
6170 G1VerifyBitmapClosure(const char* caller, G1CollectedHeap* g1h) : |
|
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|
6171 _caller(caller), _g1h(g1h), _failures(false) { } |
|
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|
6172 |
|
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|
6173 bool failures() { return _failures; } |
|
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|
6174 |
|
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|
6175 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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|
6176 if (hr->continuesHumongous()) return false; |
|
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|
6177 |
|
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|
6178 bool result = _g1h->verify_bitmaps(_caller, hr); |
|
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|
6179 if (!result) { |
|
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|
6180 _failures = true; |
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|
6181 } |
|
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|
6182 return false; |
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|
6183 } |
|
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|
6184 }; |
|
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|
6185 |
|
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|
6186 void G1CollectedHeap::check_bitmaps(const char* caller) { |
|
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|
6187 if (!G1VerifyBitmaps) return; |
|
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|
6188 |
|
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|
6189 G1VerifyBitmapClosure cl(caller, this); |
|
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|
6190 heap_region_iterate(&cl); |
|
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|
6191 guarantee(!cl.failures(), "bitmap verification"); |
|
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|
6192 } |
|
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|
6193 #endif // PRODUCT |
|
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|
6194 |
| 342 | 6195 void G1CollectedHeap::cleanUpCardTable() { |
| 12343 | 6196 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 6197 double start = os::elapsedTime(); |
| 6198 | |
| 4023 | 6199 { |
| 6200 // Iterate over the dirty cards region list. | |
| 6201 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 6202 | |
| 4711 | 6203 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 6204 set_par_threads(); | |
| 4023 | 6205 workers()->run_task(&cleanup_task); |
| 6206 set_par_threads(0); | |
| 6207 } else { | |
| 6208 while (_dirty_cards_region_list) { | |
| 6209 HeapRegion* r = _dirty_cards_region_list; | |
| 6210 cleanup_task.clear_cards(r); | |
| 6211 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 6212 if (_dirty_cards_region_list == r) { | |
| 6213 // The last region. | |
| 6214 _dirty_cards_region_list = NULL; | |
| 6215 } | |
| 6216 r->set_next_dirty_cards_region(NULL); | |
|
796
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|
6217 } |
|
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|
6218 } |
| 4023 | 6219 #ifndef PRODUCT |
| 6220 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 6221 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 6222 heap_region_iterate(&cleanup_verifier); | |
| 6223 } | |
| 6224 #endif | |
|
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|
6225 } |
|
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|
6226 |
| 342 | 6227 double elapsed = os::elapsedTime() - start; |
|
6219
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|
6228 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 6229 } |
| 6230 | |
| 10405 | 6231 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
| 2152 | 6232 size_t pre_used = 0; |
| 6233 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 6234 | |
| 342 | 6235 double young_time_ms = 0.0; |
| 6236 double non_young_time_ms = 0.0; | |
| 6237 | |
|
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|
6238 // Since the collection set is a superset of the the young list, |
|
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|
6239 // all we need to do to clear the young list is clear its |
|
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|
6240 // head and length, and unlink any young regions in the code below |
|
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|
6241 _young_list->clear(); |
|
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|
6242 |
| 342 | 6243 G1CollectorPolicy* policy = g1_policy(); |
| 6244 | |
| 6245 double start_sec = os::elapsedTime(); | |
| 6246 bool non_young = true; | |
| 6247 | |
| 6248 HeapRegion* cur = cs_head; | |
| 6249 int age_bound = -1; | |
| 6250 size_t rs_lengths = 0; | |
| 6251 | |
| 6252 while (cur != NULL) { | |
| 2361 | 6253 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 6254 if (non_young) { |
| 6255 if (cur->is_young()) { | |
| 6256 double end_sec = os::elapsedTime(); | |
| 6257 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 6258 non_young_time_ms += elapsed_ms; | |
| 6259 | |
| 6260 start_sec = os::elapsedTime(); | |
| 6261 non_young = false; | |
| 6262 } | |
| 6263 } else { | |
|
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|
6264 if (!cur->is_young()) { |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
6265 double end_sec = os::elapsedTime(); |
|
dc467e8b2c5e
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|
6266 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
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|
6267 young_time_ms += elapsed_ms; |
|
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|
6268 |
|
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|
6269 start_sec = os::elapsedTime(); |
|
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|
6270 non_young = true; |
|
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|
6271 } |
| 342 | 6272 } |
| 6273 | |
|
17755
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8027295: Free CSet takes ~50% of young pause time
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changeset
|
6274 rs_lengths += cur->rem_set()->occupied_locked(); |
| 342 | 6275 |
| 6276 HeapRegion* next = cur->next_in_collection_set(); | |
| 6277 assert(cur->in_collection_set(), "bad CS"); | |
| 6278 cur->set_next_in_collection_set(NULL); | |
| 6279 cur->set_in_collection_set(false); | |
| 6280 | |
| 6281 if (cur->is_young()) { | |
| 6282 int index = cur->young_index_in_cset(); | |
|
4090
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changeset
|
6283 assert(index != -1, "invariant"); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6284 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 6285 size_t words_survived = _surviving_young_words[index]; |
| 6286 cur->record_surv_words_in_group(words_survived); | |
|
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|
6287 |
|
1316cec51b4d
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changeset
|
6288 // 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
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|
6289 // (linked via next_in_collection_set()) but it is still in the |
|
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|
6290 // young list (linked via next_young_region()). Clear the |
|
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|
6291 // _next_young_region field. |
|
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changeset
|
6292 cur->set_next_young_region(NULL); |
| 342 | 6293 } else { |
| 6294 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
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changeset
|
6295 assert(index == -1, "invariant"); |
| 342 | 6296 } |
| 6297 | |
| 6298 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 6299 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 6300 "invariant" ); | |
| 6301 | |
| 6302 if (!cur->evacuation_failed()) { | |
|
4097
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|
6303 MemRegion used_mr = cur->used_region(); |
|
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|
6304 |
| 342 | 6305 // And the region is empty. |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
6306 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
|
17736
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8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
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|
6307 pre_used += cur->used(); |
|
17755
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changeset
|
6308 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
| 342 | 6309 } else { |
| 6310 cur->uninstall_surv_rate_group(); | |
|
4090
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changeset
|
6311 if (cur->is_young()) { |
| 342 | 6312 cur->set_young_index_in_cset(-1); |
|
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|
6313 } |
| 342 | 6314 cur->set_evacuation_failed(false); |
| 4072 | 6315 // The region is now considered to be old. |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
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20445
diff
changeset
|
6316 cur->set_old(); |
| 4072 | 6317 _old_set.add(cur); |
| 10405 | 6318 evacuation_info.increment_collectionset_used_after(cur->used()); |
| 342 | 6319 } |
| 6320 cur = next; | |
| 6321 } | |
| 6322 | |
| 10405 | 6323 evacuation_info.set_regions_freed(local_free_list.length()); |
| 342 | 6324 policy->record_max_rs_lengths(rs_lengths); |
| 6325 policy->cset_regions_freed(); | |
| 6326 | |
| 6327 double end_sec = os::elapsedTime(); | |
| 6328 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
4097
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|
6329 |
|
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diff
changeset
|
6330 if (non_young) { |
| 342 | 6331 non_young_time_ms += elapsed_ms; |
|
4097
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|
6332 } else { |
| 342 | 6333 young_time_ms += elapsed_ms; |
|
4097
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|
6334 } |
| 342 | 6335 |
|
17736
58fc1b1523dc
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brutisso
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17727
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changeset
|
6336 prepend_to_freelist(&local_free_list); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6337 decrement_summary_bytes(pre_used); |
|
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
|
6338 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
|
922993931b3d
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6188
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changeset
|
6339 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6340 } |
| 6341 | |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
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20304
diff
changeset
|
6342 class G1FreeHumongousRegionClosure : public HeapRegionClosure { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6343 private: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6344 FreeRegionList* _free_region_list; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6345 HeapRegionSet* _proxy_set; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6346 HeapRegionSetCount _humongous_regions_removed; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6347 size_t _freed_bytes; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
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20304
diff
changeset
|
6348 public: |
|
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
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20304
diff
changeset
|
6350 G1FreeHumongousRegionClosure(FreeRegionList* free_region_list) : |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6351 _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
|
6352 } |
|
755930f931e3
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tschatzl
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20304
diff
changeset
|
6353 |
|
755930f931e3
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tschatzl
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20304
diff
changeset
|
6354 virtual bool doHeapRegion(HeapRegion* r) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6355 if (!r->startsHumongous()) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6356 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6357 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6358 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6359 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6360 |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6361 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
|
6362 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
|
6363 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6364 // 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
|
6365 // 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
|
6366 // 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
|
6367 // |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6368 // 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
|
6369 // because: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6370 // - 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
|
6371 // the object because we never allocate other objects into them. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6372 // (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
|
6373 // remembered set) |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6374 // - 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
|
6375 // (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
|
6376 // until the end of a concurrent mark. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6377 // |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6378 // 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
|
6379 // 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
|
6380 // all objects allocated during that time are considered live. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6381 // SATB marking is even more conservative than the remembered set. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6382 // 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
|
6383 // nobody has a reference to it. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6384 // 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
|
6385 // 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
|
6386 // |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6387 // Other implementation considerations: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6388 // - 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
|
6389 // been observed to be used as temporary objects. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6390 // - 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
|
6391 // sets. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6392 // 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
|
6393 // 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
|
6394 // complexity. |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6395 uint region_idx = r->hrm_index(); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6396 if (g1h->humongous_is_live(region_idx) || |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6397 g1h->humongous_region_is_always_live(region_idx)) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6398 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6399 if (G1TraceReclaimDeadHumongousObjectsAtYoungGC) { |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6400 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
|
6401 r->isHumongous(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6402 region_idx, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6403 r->rem_set()->occupied(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6404 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
|
6405 next_bitmap->isMarked(r->bottom()), |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6406 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
|
6407 obj->is_objArray() |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6408 ); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6409 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6410 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6411 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6412 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6413 |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6414 guarantee(!obj->is_objArray(), |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6415 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
|
6416 r->bottom())); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6417 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6418 if (G1TraceReclaimDeadHumongousObjectsAtYoungGC) { |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6419 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
|
6420 r->isHumongous(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6421 r->bottom(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6422 region_idx, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6423 r->region_num(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6424 r->rem_set()->occupied(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6425 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
|
6426 next_bitmap->isMarked(r->bottom()), |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6427 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
|
6428 obj->is_objArray() |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6429 ); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6430 } |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6431 // 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
|
6432 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
|
6433 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
|
6434 } |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6435 _freed_bytes += r->used(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6436 r->set_containing_set(NULL); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6437 _humongous_regions_removed.increment(1u, r->capacity()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6438 g1h->free_humongous_region(r, _free_region_list, false); |
|
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 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6441 } |
|
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 HeapRegionSetCount& humongous_free_count() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6444 return _humongous_regions_removed; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6445 } |
|
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 size_t bytes_freed() const { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6448 return _freed_bytes; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6449 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6450 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6451 size_t humongous_reclaimed() const { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6452 return _humongous_regions_removed.length(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6453 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6454 }; |
|
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 void G1CollectedHeap::eagerly_reclaim_humongous_regions() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6457 assert_at_safepoint(true); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6458 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6459 if (!G1ReclaimDeadHumongousObjectsAtYoungGC || !_has_humongous_reclaim_candidates) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6460 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
|
6461 return; |
|
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 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6464 double start_time = os::elapsedTime(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6465 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6466 FreeRegionList local_cleanup_list("Local Humongous Cleanup List"); |
|
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 G1FreeHumongousRegionClosure cl(&local_cleanup_list); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6469 heap_region_iterate(&cl); |
|
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 HeapRegionSetCount empty_set; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6472 remove_from_old_sets(empty_set, cl.humongous_free_count()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6473 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6474 G1HRPrinter* hr_printer = _g1h->hr_printer(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6475 if (hr_printer->is_active()) { |
|
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8027959: Early reclamation of large objects in G1
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|
6476 FreeRegionListIterator iter(&local_cleanup_list); |
|
755930f931e3
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|
6477 while (iter.more_available()) { |
|
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8027959: Early reclamation of large objects in G1
tschatzl
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changeset
|
6478 HeapRegion* hr = iter.get_next(); |
|
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8027959: Early reclamation of large objects in G1
tschatzl
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diff
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|
6479 hr_printer->cleanup(hr); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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diff
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|
6480 } |
|
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|
6481 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
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changeset
|
6482 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
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diff
changeset
|
6483 prepend_to_freelist(&local_cleanup_list); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6484 decrement_summary_bytes(cl.bytes_freed()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
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20304
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|
6485 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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diff
changeset
|
6486 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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diff
changeset
|
6487 cl.humongous_reclaimed()); |
|
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8027959: Early reclamation of large objects in G1
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diff
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|
6488 } |
|
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|
6489 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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diff
changeset
|
6490 // 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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1391
diff
changeset
|
6491 // any policy statistics or update free lists; we are abandoning |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
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diff
changeset
|
6492 // 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
|
6493 // 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
|
6494 // 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
|
6495 // This is only called when we're doing a full collection |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6496 // and is immediately followed by the tearing down of the young list. |
|
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changeset
|
6497 |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6498 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
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diff
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|
6499 HeapRegion* cur = cs_head; |
|
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|
6500 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6501 while (cur != 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 HeapRegion* next = cur->next_in_collection_set(); |
|
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changeset
|
6503 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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|
6504 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
|
6505 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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diff
changeset
|
6506 cur->set_young_index_in_cset(-1); |
|
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parents:
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diff
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|
6507 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
|
6508 } |
|
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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
|
6509 } |
|
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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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|
6510 |
| 2152 | 6511 void G1CollectedHeap::set_free_regions_coming() { |
| 6512 if (G1ConcRegionFreeingVerbose) { | |
| 6513 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6514 "setting free regions coming"); | |
| 6515 } | |
| 6516 | |
| 6517 assert(!free_regions_coming(), "pre-condition"); | |
| 6518 _free_regions_coming = true; | |
| 342 | 6519 } |
| 6520 | |
| 2152 | 6521 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
|
6522 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
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4836
diff
changeset
|
6523 |
| 2152 | 6524 { |
| 6525 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6526 _free_regions_coming = false; | |
| 6527 SecondaryFreeList_lock->notify_all(); | |
| 6528 } | |
| 6529 | |
| 6530 if (G1ConcRegionFreeingVerbose) { | |
| 6531 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6532 "reset free regions coming"); | |
| 342 | 6533 } |
| 6534 } | |
| 6535 | |
| 2152 | 6536 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6537 // Most of the time we won't have to wait, so let's do a quick test | |
| 6538 // first before we take the lock. | |
| 6539 if (!free_regions_coming()) { | |
| 6540 return; | |
| 6541 } | |
| 6542 | |
| 6543 if (G1ConcRegionFreeingVerbose) { | |
| 6544 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6545 "waiting for free regions"); | |
| 342 | 6546 } |
| 6547 | |
| 6548 { | |
| 2152 | 6549 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6550 while (free_regions_coming()) { | |
| 6551 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6552 } |
| 2152 | 6553 } |
| 6554 | |
| 6555 if (G1ConcRegionFreeingVerbose) { | |
| 6556 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6557 "done waiting for free regions"); | |
| 6558 } | |
| 342 | 6559 } |
| 6560 | |
| 6561 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6562 assert(heap_lock_held_for_gc(), | |
| 6563 "the heap lock should already be held by or for this thread"); | |
| 6564 _young_list->push_region(hr); | |
| 6565 } | |
| 6566 | |
| 6567 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6568 private: | |
| 6569 bool _success; | |
| 6570 public: | |
| 6571 NoYoungRegionsClosure() : _success(true) { } | |
| 6572 bool doHeapRegion(HeapRegion* r) { | |
| 6573 if (r->is_young()) { | |
| 6574 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6575 r->bottom(), r->end()); | |
| 6576 _success = false; | |
| 6577 } | |
| 6578 return false; | |
| 6579 } | |
| 6580 bool success() { return _success; } | |
| 6581 }; | |
| 6582 | |
|
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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|
6583 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
|
6584 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
|
6585 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6586 if (check_heap) { |
| 342 | 6587 NoYoungRegionsClosure closure; |
| 6588 heap_region_iterate(&closure); | |
| 6589 ret = ret && closure.success(); | |
| 6590 } | |
| 6591 | |
| 6592 return ret; | |
| 6593 } | |
| 6594 | |
| 4072 | 6595 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6596 private: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6597 HeapRegionSet *_old_set; |
| 2152 | 6598 |
| 342 | 6599 public: |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6600 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6601 |
| 342 | 6602 bool doHeapRegion(HeapRegion* r) { |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
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20445
diff
changeset
|
6603 if (r->is_old()) { |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6604 _old_set->remove(r); |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6605 } else { |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6606 // 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
|
6607 // We ignore young regions, we'll empty the young list afterwards. |
| 4072 | 6608 // 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
|
6609 // humongous regions set. |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6610 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
|
6611 "it cannot be another type"); |
| 342 | 6612 } |
| 6613 return false; | |
| 6614 } | |
| 6615 | |
| 4072 | 6616 ~TearDownRegionSetsClosure() { |
| 6617 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6618 } |
| 342 | 6619 }; |
| 6620 | |
| 4072 | 6621 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6622 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6623 | |
| 6624 if (!free_list_only) { | |
| 6625 TearDownRegionSetsClosure cl(&_old_set); | |
| 6626 heap_region_iterate(&cl); | |
| 6627 | |
| 17764 | 6628 // Note that emptying the _young_list is postponed and instead done as |
| 6629 // the first step when rebuilding the regions sets again. The reason for | |
| 6630 // this is that during a full GC string deduplication needs to know if | |
| 6631 // a collected region was young or old when the full GC was initiated. | |
| 4072 | 6632 } |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6633 _hrm.remove_all_free_regions(); |
| 4072 | 6634 } |
| 6635 | |
| 6636 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6637 private: | |
| 6638 bool _free_list_only; | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6639 HeapRegionSet* _old_set; |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6640 HeapRegionManager* _hrm; |
| 4072 | 6641 size_t _total_used; |
| 6642 | |
| 6643 public: | |
| 6644 RebuildRegionSetsClosure(bool free_list_only, | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6645 HeapRegionSet* old_set, HeapRegionManager* hrm) : |
| 4072 | 6646 _free_list_only(free_list_only), |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6647 _old_set(old_set), _hrm(hrm), _total_used(0) { |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6648 assert(_hrm->num_free_regions() == 0, "pre-condition"); |
| 4072 | 6649 if (!free_list_only) { |
| 6650 assert(_old_set->is_empty(), "pre-condition"); | |
| 6651 } | |
| 6652 } | |
| 6653 | |
| 6654 bool doHeapRegion(HeapRegion* r) { | |
| 6655 if (r->continuesHumongous()) { | |
| 6656 return false; | |
| 6657 } | |
| 6658 | |
| 6659 if (r->is_empty()) { | |
| 6660 // Add free regions to the free list | |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6661 r->set_free(); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6662 r->set_allocation_context(AllocationContext::system()); |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6663 _hrm->insert_into_free_list(r); |
| 4072 | 6664 } else if (!_free_list_only) { |
| 6665 assert(!r->is_young(), "we should not come across young regions"); | |
| 6666 | |
| 6667 if (r->isHumongous()) { | |
| 6668 // We ignore humongous regions, we left the humongous set unchanged | |
| 6669 } else { | |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6670 // Objects that were compacted would have ended up on regions |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6671 // that were previously old or free. |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6672 assert(r->is_free() || r->is_old(), "invariant"); |
|
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6673 // 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
|
6674 r->set_old(); |
| 4072 | 6675 _old_set->add(r); |
| 6676 } | |
| 6677 _total_used += r->used(); | |
| 6678 } | |
| 6679 | |
| 6680 return false; | |
| 6681 } | |
| 6682 | |
| 6683 size_t total_used() { | |
| 6684 return _total_used; | |
| 6685 } | |
| 6686 }; | |
| 6687 | |
| 6688 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6689 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6690 | |
| 17764 | 6691 if (!free_list_only) { |
| 6692 _young_list->empty_list(); | |
| 6693 } | |
| 6694 | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6695 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_hrm); |
| 4072 | 6696 heap_region_iterate(&cl); |
| 6697 | |
| 6698 if (!free_list_only) { | |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6699 _allocator->set_used(cl.total_used()); |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6700 } |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6701 assert(_allocator->used_unlocked() == recalculate_used(), |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6702 err_msg("inconsistent _allocator->used_unlocked(), " |
| 4072 | 6703 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6704 _allocator->used_unlocked(), recalculate_used())); |
| 342 | 6705 } |
| 6706 | |
| 6707 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6708 _refine_cte_cl->set_concurrent(concurrent); | |
| 6709 } | |
| 6710 | |
| 6711 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6712 HeapRegion* hr = heap_region_containing(p); | |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
6713 return hr->is_in(p); |
| 342 | 6714 } |
| 2152 | 6715 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6716 // 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
|
6717 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6718 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
|
6719 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6720 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
|
6721 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6722 "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
|
6723 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
|
6724 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6725 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
|
6726 false /* is_old */, |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6727 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6728 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6729 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6730 _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
|
6731 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
|
6732 return new_alloc_region; |
|
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 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6736 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6737 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6738 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
|
6739 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6740 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
|
6741 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
|
6742 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6743 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
|
6744 _allocator->increase_used(allocated_bytes); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6745 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6746 // 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
|
6747 // 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
|
6748 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6749 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6750 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6751 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6752 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6753 // 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
|
6754 // in the workgroup. |
| 4711 | 6755 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
|
6756 uint n_workers = workers()->active_workers(); |
| 4711 | 6757 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6758 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6759 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6760 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6761 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
|
6762 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6763 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6764 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6765 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6766 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6767 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6768 // 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
|
6769 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6770 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
|
6771 uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6772 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6773 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
|
6774 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6775 if (count < g1_policy()->max_regions(ap)) { |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6776 bool survivor = (ap == GCAllocForSurvived); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6777 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
|
6778 !survivor, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6779 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6780 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6781 // 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
|
6782 // 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
|
6783 // for survivors too. |
|
20274
a8137787acfe
8047821: G1 Does not use the save_marks functionality as intended
mgerdin
parents:
20270
diff
changeset
|
6784 new_alloc_region->record_top_and_timestamp(); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6785 if (survivor) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6786 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6787 _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
|
6788 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
|
6789 } else { |
|
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6790 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
|
6791 _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
|
6792 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
|
6793 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6794 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
|
6795 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
|
6796 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6797 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6798 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
|
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 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6802 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6803 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6804 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
|
6805 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6806 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6807 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
|
6808 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
|
6809 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
|
6810 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6811 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6812 } else { |
| 6813 _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
|
6814 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6815 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6816 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6817 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6818 // Heap region set verification |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6819 |
| 2152 | 6820 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6821 private: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6822 HeapRegionSet* _old_set; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6823 HeapRegionSet* _humongous_set; |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6824 HeapRegionManager* _hrm; |
| 2152 | 6825 |
| 6826 public: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6827 HeapRegionSetCount _old_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6828 HeapRegionSetCount _humongous_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6829 HeapRegionSetCount _free_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6830 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6831 VerifyRegionListsClosure(HeapRegionSet* old_set, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6832 HeapRegionSet* humongous_set, |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6833 HeapRegionManager* hrm) : |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6834 _old_set(old_set), _humongous_set(humongous_set), _hrm(hrm), |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6835 _old_count(), _humongous_count(), _free_count(){ } |
| 2152 | 6836 |
| 6837 bool doHeapRegion(HeapRegion* hr) { | |
| 6838 if (hr->continuesHumongous()) { | |
| 6839 return false; | |
| 6840 } | |
| 6841 | |
| 6842 if (hr->is_young()) { | |
| 6843 // TODO | |
| 6844 } else if (hr->startsHumongous()) { | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6845 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
|
6846 _humongous_count.increment(1u, hr->capacity()); |
| 2152 | 6847 } else if (hr->is_empty()) { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6848 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
|
6849 _free_count.increment(1u, hr->capacity()); |
|
20481
c02ec279b062
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|
6850 } else if (hr->is_old()) { |
|
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|
6851 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->hrm_index())); |
|
17736
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changeset
|
6852 _old_count.increment(1u, hr->capacity()); |
|
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|
6853 } else { |
|
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|
6854 ShouldNotReachHere(); |
| 2152 | 6855 } |
| 6856 return false; | |
| 6857 } | |
|
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|
6858 |
|
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a8ea2f110d87
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diff
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|
6859 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, HeapRegionManager* free_list) { |
|
17736
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changeset
|
6860 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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changeset
|
6861 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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|
6862 old_set->total_capacity_bytes(), _old_count.capacity())); |
|
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|
6863 |
|
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changeset
|
6864 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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|
6865 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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|
6866 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
|
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|
6867 |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
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20335
diff
changeset
|
6868 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
|
6869 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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|
6870 free_list->total_capacity_bytes(), _free_count.capacity())); |
|
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|
6871 } |
| 2152 | 6872 }; |
| 6873 | |
| 6874 void G1CollectedHeap::verify_region_sets() { | |
| 6875 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6876 | |
| 6877 // First, check the explicit lists. | |
|
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changeset
|
6878 _hrm.verify(); |
| 2152 | 6879 { |
| 6880 // Given that a concurrent operation might be adding regions to | |
| 6881 // the secondary free list we have to take the lock before | |
| 6882 // verifying it. | |
| 6883 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
17736
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|
6884 _secondary_free_list.verify_list(); |
|
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|
6885 } |
| 2152 | 6886 |
| 6887 // If a concurrent region freeing operation is in progress it will | |
| 6888 // be difficult to correctly attributed any free regions we come | |
| 6889 // across to the correct free list given that they might belong to | |
| 6890 // one of several (free_list, secondary_free_list, any local lists, | |
| 6891 // etc.). So, if that's the case we will skip the rest of the | |
| 6892 // verification operation. Alternatively, waiting for the concurrent | |
| 6893 // operation to complete will have a non-trivial effect on the GC's | |
| 6894 // operation (no concurrent operation will last longer than the | |
| 6895 // interval between two calls to verification) and it might hide | |
| 6896 // any issues that we would like to catch during testing. | |
| 6897 if (free_regions_coming()) { | |
| 6898 return; | |
| 6899 } | |
| 6900 | |
| 2361 | 6901 // Make sure we append the secondary_free_list on the free_list so |
| 6902 // that all free regions we will come across can be safely | |
| 6903 // attributed to the free_list. | |
| 6904 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6905 |
| 6906 // Finally, make sure that the region accounting in the lists is | |
| 6907 // consistent with what we see in the heap. | |
| 6908 | |
|
20377
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diff
changeset
|
6909 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_hrm); |
| 2152 | 6910 heap_region_iterate(&cl); |
|
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changeset
|
6911 cl.verify_counts(&_old_set, &_humongous_set, &_hrm); |
| 342 | 6912 } |
| 12080 | 6913 |
| 6914 // Optimized nmethod scanning | |
| 6915 | |
| 6916 class RegisterNMethodOopClosure: public OopClosure { | |
| 6917 G1CollectedHeap* _g1h; | |
| 6918 nmethod* _nm; | |
| 6919 | |
| 6920 template <class T> void do_oop_work(T* p) { | |
| 6921 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6922 if (!oopDesc::is_null(heap_oop)) { | |
| 6923 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6924 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
|
6925 assert(!hr->continuesHumongous(), |
|
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
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diff
changeset
|
6926 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
28674af341ac
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diff
changeset
|
6927 " starting at "HR_FORMAT, |
|
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
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diff
changeset
|
6928 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
| 12080 | 6929 |
| 20494 | 6930 // HeapRegion::add_strong_code_root_locked() avoids adding duplicate entries. |
| 6931 hr->add_strong_code_root_locked(_nm); | |
| 12080 | 6932 } |
| 6933 } | |
| 6934 | |
| 6935 public: | |
| 6936 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6937 _g1h(g1h), _nm(nm) {} | |
| 6938 | |
| 6939 void do_oop(oop* p) { do_oop_work(p); } | |
| 6940 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6941 }; | |
| 6942 | |
| 6943 class UnregisterNMethodOopClosure: public OopClosure { | |
| 6944 G1CollectedHeap* _g1h; | |
| 6945 nmethod* _nm; | |
| 6946 | |
| 6947 template <class T> void do_oop_work(T* p) { | |
| 6948 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6949 if (!oopDesc::is_null(heap_oop)) { | |
| 6950 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6951 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
13062
28674af341ac
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tschatzl
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13060
diff
changeset
|
6952 assert(!hr->continuesHumongous(), |
|
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
tschatzl
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13060
diff
changeset
|
6953 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
|
6954 " starting at "HR_FORMAT, |
|
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
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13060
diff
changeset
|
6955 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
|
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diff
changeset
|
6956 |
| 12080 | 6957 hr->remove_strong_code_root(_nm); |
| 6958 } | |
| 6959 } | |
| 6960 | |
| 6961 public: | |
| 6962 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6963 _g1h(g1h), _nm(nm) {} | |
| 6964 | |
| 6965 void do_oop(oop* p) { do_oop_work(p); } | |
| 6966 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6967 }; | |
| 6968 | |
| 6969 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
| 6970 CollectedHeap::register_nmethod(nm); | |
| 6971 | |
| 6972 guarantee(nm != NULL, "sanity"); | |
| 6973 RegisterNMethodOopClosure reg_cl(this, nm); | |
| 6974 nm->oops_do(®_cl); | |
| 6975 } | |
| 6976 | |
| 6977 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
| 6978 CollectedHeap::unregister_nmethod(nm); | |
| 6979 | |
| 6980 guarantee(nm != NULL, "sanity"); | |
| 6981 UnregisterNMethodOopClosure reg_cl(this, nm); | |
| 6982 nm->oops_do(®_cl, true); | |
| 6983 } | |
| 6984 | |
|
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
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17749
diff
changeset
|
6985 void G1CollectedHeap::purge_code_root_memory() { |
|
191174b49bec
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tschatzl
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17749
diff
changeset
|
6986 double purge_start = os::elapsedTime(); |
| 20494 | 6987 G1CodeRootSet::purge(); |
|
17753
191174b49bec
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17749
diff
changeset
|
6988 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
|
191174b49bec
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17749
diff
changeset
|
6989 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
|
6990 } |
|
191174b49bec
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tschatzl
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17749
diff
changeset
|
6991 |
| 12080 | 6992 class RebuildStrongCodeRootClosure: public CodeBlobClosure { |
| 6993 G1CollectedHeap* _g1h; | |
| 6994 | |
| 6995 public: | |
| 6996 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
| 6997 _g1h(g1h) {} | |
| 6998 | |
| 6999 void do_code_blob(CodeBlob* cb) { | |
| 7000 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
| 7001 if (nm == NULL) { | |
| 7002 return; | |
| 7003 } | |
| 7004 | |
|
20191
fd81a5764900
8046231: G1: Code root location ... from nmethod ... not in strong code roots for region
pliden
parents:
20190
diff
changeset
|
7005 if (ScavengeRootsInCode) { |
| 12080 | 7006 _g1h->register_nmethod(nm); |
| 7007 } | |
| 7008 } | |
| 7009 }; | |
| 7010 | |
| 7011 void G1CollectedHeap::rebuild_strong_code_roots() { | |
| 7012 RebuildStrongCodeRootClosure blob_cl(this); | |
| 7013 CodeCache::blobs_do(&blob_cl); | |
| 7014 } |