Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 17736:58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
Reviewed-by: tschatzl, pliden
| author | brutisso |
|---|---|
| date | Fri, 14 Mar 2014 10:15:46 +0100 |
| parents | cfd4aac53239 |
| children | d60ecdb2773e |
| 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 | |
| 1972 | 25 #include "precompiled.hpp" |
| 12080 | 26 #include "code/codeCache.hpp" |
| 1972 | 27 #include "code/icBuffer.hpp" |
| 28 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
| 29 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
| 30 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
| 31 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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32 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
| 1972 | 33 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 34 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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35 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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36 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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37 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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38 #include "gc_implementation/g1/g1Log.hpp" |
| 1972 | 39 #include "gc_implementation/g1/g1MarkSweep.hpp" |
| 40 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
| 41 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
| 10405 | 42 #include "gc_implementation/g1/g1YCTypes.hpp" |
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43 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 44 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
| 45 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 46 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
| 10405 | 47 #include "gc_implementation/shared/gcHeapSummary.hpp" |
| 48 #include "gc_implementation/shared/gcTimer.hpp" | |
| 49 #include "gc_implementation/shared/gcTrace.hpp" | |
| 50 #include "gc_implementation/shared/gcTraceTime.hpp" | |
| 1972 | 51 #include "gc_implementation/shared/isGCActiveMark.hpp" |
| 52 #include "memory/gcLocker.inline.hpp" | |
| 53 #include "memory/generationSpec.hpp" | |
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54 #include "memory/iterator.hpp" |
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55 #include "memory/referenceProcessor.hpp" |
| 1972 | 56 #include "oops/oop.inline.hpp" |
| 57 #include "oops/oop.pcgc.inline.hpp" | |
| 58 #include "runtime/vmThread.hpp" | |
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59 #include "utilities/ticks.hpp" |
| 342 | 60 |
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61 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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62 |
| 342 | 63 // turn it on so that the contents of the young list (scan-only / |
| 64 // to-be-collected) are printed at "strategic" points before / during | |
| 65 // / after the collection --- this is useful for debugging | |
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66 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 67 // CURRENT STATUS |
| 68 // This file is under construction. Search for "FIXME". | |
| 69 | |
| 70 // INVARIANTS/NOTES | |
| 71 // | |
| 72 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 73 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 74 // and allocate_new_tlab, which are the "entry" points to the | |
| 75 // allocation code from the rest of the JVM. (Note that this does not | |
| 76 // apply to TLAB allocation, which is not part of this interface: it | |
| 77 // is done by clients of this interface.) | |
| 342 | 78 |
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79 // Notes on implementation of parallelism in different tasks. |
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80 // |
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81 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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82 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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83 // It does use run_task() which sets _n_workers in the task. |
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84 // G1ParTask executes g1_process_strong_roots() -> |
| 10405 | 85 // SharedHeap::process_strong_roots() which calls eventually to |
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86 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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87 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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88 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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89 // |
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90 |
| 342 | 91 // Local to this file. |
| 92 | |
| 93 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 94 SuspendibleThreadSet* _sts; | |
| 95 G1RemSet* _g1rs; | |
| 96 ConcurrentG1Refine* _cg1r; | |
| 97 bool _concurrent; | |
| 98 public: | |
| 99 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
| 100 G1RemSet* g1rs, | |
| 101 ConcurrentG1Refine* cg1r) : | |
| 102 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
| 103 {} | |
| 104 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
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105 bool oops_into_cset = _g1rs->refine_card(card_ptr, worker_i, false); |
| 1705 | 106 // This path is executed by the concurrent refine or mutator threads, |
| 107 // concurrently, and so we do not care if card_ptr contains references | |
| 108 // that point into the collection set. | |
| 109 assert(!oops_into_cset, "should be"); | |
| 110 | |
| 342 | 111 if (_concurrent && _sts->should_yield()) { |
| 112 // Caller will actually yield. | |
| 113 return false; | |
| 114 } | |
| 115 // Otherwise, we finished successfully; return true. | |
| 116 return true; | |
| 117 } | |
| 118 void set_concurrent(bool b) { _concurrent = b; } | |
| 119 }; | |
| 120 | |
| 121 | |
| 122 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 123 int _calls; | |
| 124 G1CollectedHeap* _g1h; | |
| 125 CardTableModRefBS* _ctbs; | |
| 126 int _histo[256]; | |
| 127 public: | |
| 128 ClearLoggedCardTableEntryClosure() : | |
| 12343 | 129 _calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) |
| 342 | 130 { |
| 131 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 132 } | |
| 133 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 134 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 135 _calls++; | |
| 136 unsigned char* ujb = (unsigned char*)card_ptr; | |
| 137 int ind = (int)(*ujb); | |
| 138 _histo[ind]++; | |
| 139 *card_ptr = -1; | |
| 140 } | |
| 141 return true; | |
| 142 } | |
| 143 int calls() { return _calls; } | |
| 144 void print_histo() { | |
| 145 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 146 for (int i = 0; i < 256; i++) { | |
| 147 if (_histo[i] != 0) { | |
| 148 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 149 } | |
| 150 } | |
| 151 } | |
| 152 }; | |
| 153 | |
| 154 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 155 int _calls; | |
| 156 G1CollectedHeap* _g1h; | |
| 157 CardTableModRefBS* _ctbs; | |
| 158 public: | |
| 159 RedirtyLoggedCardTableEntryClosure() : | |
| 12343 | 160 _calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) {} |
| 161 | |
| 342 | 162 bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
| 163 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 164 _calls++; | |
| 165 *card_ptr = 0; | |
| 166 } | |
| 167 return true; | |
| 168 } | |
| 169 int calls() { return _calls; } | |
| 170 }; | |
| 171 | |
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172 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
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173 public: |
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174 bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
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175 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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176 return true; |
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177 } |
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178 }; |
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179 |
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180 YoungList::YoungList(G1CollectedHeap* g1h) : |
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181 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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182 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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183 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 184 } |
| 185 | |
| 186 void YoungList::push_region(HeapRegion *hr) { | |
| 187 assert(!hr->is_young(), "should not already be young"); | |
| 188 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 189 | |
| 190 hr->set_next_young_region(_head); | |
| 191 _head = hr; | |
| 192 | |
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193 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 194 ++_length; |
| 195 } | |
| 196 | |
| 197 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 198 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 199 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 200 | |
| 201 hr->set_next_young_region(_survivor_head); | |
| 202 if (_survivor_head == NULL) { | |
| 545 | 203 _survivor_tail = hr; |
| 342 | 204 } |
| 205 _survivor_head = hr; | |
| 206 ++_survivor_length; | |
| 207 } | |
| 208 | |
| 209 void YoungList::empty_list(HeapRegion* list) { | |
| 210 while (list != NULL) { | |
| 211 HeapRegion* next = list->get_next_young_region(); | |
| 212 list->set_next_young_region(NULL); | |
| 213 list->uninstall_surv_rate_group(); | |
| 214 list->set_not_young(); | |
| 215 list = next; | |
| 216 } | |
| 217 } | |
| 218 | |
| 219 void YoungList::empty_list() { | |
| 220 assert(check_list_well_formed(), "young list should be well formed"); | |
| 221 | |
| 222 empty_list(_head); | |
| 223 _head = NULL; | |
| 224 _length = 0; | |
| 225 | |
| 226 empty_list(_survivor_head); | |
| 227 _survivor_head = NULL; | |
| 545 | 228 _survivor_tail = NULL; |
| 342 | 229 _survivor_length = 0; |
| 230 | |
| 231 _last_sampled_rs_lengths = 0; | |
| 232 | |
| 233 assert(check_list_empty(false), "just making sure..."); | |
| 234 } | |
| 235 | |
| 236 bool YoungList::check_list_well_formed() { | |
| 237 bool ret = true; | |
| 238 | |
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239 uint length = 0; |
| 342 | 240 HeapRegion* curr = _head; |
| 241 HeapRegion* last = NULL; | |
| 242 while (curr != NULL) { | |
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243 if (!curr->is_young()) { |
| 342 | 244 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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245 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 246 curr->bottom(), curr->end(), |
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247 curr->is_young(), curr->is_survivor()); |
| 342 | 248 ret = false; |
| 249 } | |
| 250 ++length; | |
| 251 last = curr; | |
| 252 curr = curr->get_next_young_region(); | |
| 253 } | |
| 254 ret = ret && (length == _length); | |
| 255 | |
| 256 if (!ret) { | |
| 257 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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258 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
| 342 | 259 length, _length); |
| 260 } | |
| 261 | |
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262 return ret; |
| 342 | 263 } |
| 264 | |
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265 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 266 bool ret = true; |
| 267 | |
| 268 if (_length != 0) { | |
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269 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
| 342 | 270 _length); |
| 271 ret = false; | |
| 272 } | |
| 273 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 274 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 275 ret = false; | |
| 276 } | |
| 277 if (_head != NULL) { | |
| 278 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 279 ret = false; | |
| 280 } | |
| 281 if (!ret) { | |
| 282 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 283 } | |
| 284 | |
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285 return ret; |
| 342 | 286 } |
| 287 | |
| 288 void | |
| 289 YoungList::rs_length_sampling_init() { | |
| 290 _sampled_rs_lengths = 0; | |
| 291 _curr = _head; | |
| 292 } | |
| 293 | |
| 294 bool | |
| 295 YoungList::rs_length_sampling_more() { | |
| 296 return _curr != NULL; | |
| 297 } | |
| 298 | |
| 299 void | |
| 300 YoungList::rs_length_sampling_next() { | |
| 301 assert( _curr != NULL, "invariant" ); | |
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302 size_t rs_length = _curr->rem_set()->occupied(); |
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303 |
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304 _sampled_rs_lengths += rs_length; |
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305 |
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306 // The current region may not yet have been added to the |
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307 // incremental collection set (it gets added when it is |
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308 // retired as the current allocation region). |
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309 if (_curr->in_collection_set()) { |
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310 // Update the collection set policy information for this region |
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311 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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312 } |
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313 |
| 342 | 314 _curr = _curr->get_next_young_region(); |
| 315 if (_curr == NULL) { | |
| 316 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 317 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 318 } | |
| 319 } | |
| 320 | |
| 321 void | |
| 322 YoungList::reset_auxilary_lists() { | |
| 323 guarantee( is_empty(), "young list should be empty" ); | |
| 324 assert(check_list_well_formed(), "young list should be well formed"); | |
| 325 | |
| 326 // Add survivor regions to SurvRateGroup. | |
| 327 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 328 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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329 |
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330 int young_index_in_cset = 0; |
| 342 | 331 for (HeapRegion* curr = _survivor_head; |
| 332 curr != NULL; | |
| 333 curr = curr->get_next_young_region()) { | |
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334 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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335 |
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336 // The region is a non-empty survivor so let's add it to |
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337 // the incremental collection set for the next evacuation |
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338 // pause. |
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339 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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340 young_index_in_cset += 1; |
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341 } |
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342 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
| 342 | 343 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 344 | |
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345 _head = _survivor_head; |
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346 _length = _survivor_length; |
| 342 | 347 if (_survivor_head != NULL) { |
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348 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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349 assert(_survivor_length > 0, "invariant"); |
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350 _survivor_tail->set_next_young_region(NULL); |
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351 } |
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352 |
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353 // Don't clear the survivor list handles until the start of |
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354 // the next evacuation pause - we need it in order to re-tag |
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355 // the survivor regions from this evacuation pause as 'young' |
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356 // at the start of the next. |
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357 |
| 545 | 358 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 359 |
| 360 assert(check_list_well_formed(), "young list should be well formed"); | |
| 361 } | |
| 362 | |
| 363 void YoungList::print() { | |
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364 HeapRegion* lists[] = {_head, _survivor_head}; |
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365 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 366 |
| 367 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 368 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 369 HeapRegion *curr = lists[list]; | |
| 370 if (curr == NULL) | |
| 371 gclog_or_tty->print_cr(" empty"); | |
| 372 while (curr != NULL) { | |
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373 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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374 HR_FORMAT_PARAMS(curr), |
| 342 | 375 curr->prev_top_at_mark_start(), |
| 376 curr->next_top_at_mark_start(), | |
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377 curr->age_in_surv_rate_group_cond()); |
| 342 | 378 curr = curr->get_next_young_region(); |
| 379 } | |
| 380 } | |
| 381 | |
| 382 gclog_or_tty->print_cr(""); | |
| 383 } | |
| 384 | |
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385 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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386 { |
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387 // Claim the right to put the region on the dirty cards region list |
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388 // by installing a self pointer. |
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389 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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390 if (next == NULL) { |
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391 HeapRegion* res = (HeapRegion*) |
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392 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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393 NULL); |
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394 if (res == NULL) { |
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395 HeapRegion* head; |
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396 do { |
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397 // Put the region to the dirty cards region list. |
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398 head = _dirty_cards_region_list; |
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399 next = (HeapRegion*) |
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400 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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401 if (next == head) { |
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402 assert(hr->get_next_dirty_cards_region() == hr, |
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403 "hr->get_next_dirty_cards_region() != hr"); |
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404 if (next == NULL) { |
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405 // The last region in the list points to itself. |
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406 hr->set_next_dirty_cards_region(hr); |
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407 } else { |
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408 hr->set_next_dirty_cards_region(next); |
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409 } |
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410 } |
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411 } while (next != head); |
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412 } |
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413 } |
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414 } |
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415 |
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416 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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417 { |
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418 HeapRegion* head; |
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419 HeapRegion* hr; |
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420 do { |
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421 head = _dirty_cards_region_list; |
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422 if (head == NULL) { |
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423 return NULL; |
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424 } |
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425 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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426 if (head == new_head) { |
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427 // The last region. |
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428 new_head = NULL; |
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429 } |
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430 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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431 head); |
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432 } while (hr != head); |
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433 assert(hr != NULL, "invariant"); |
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434 hr->set_next_dirty_cards_region(NULL); |
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435 return hr; |
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436 } |
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437 |
| 342 | 438 void G1CollectedHeap::stop_conc_gc_threads() { |
| 794 | 439 _cg1r->stop(); |
| 342 | 440 _cmThread->stop(); |
| 441 } | |
| 442 | |
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443 #ifdef ASSERT |
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444 // A region is added to the collection set as it is retired |
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445 // so an address p can point to a region which will be in the |
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446 // collection set but has not yet been retired. This method |
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447 // therefore is only accurate during a GC pause after all |
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448 // regions have been retired. It is used for debugging |
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449 // to check if an nmethod has references to objects that can |
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450 // be move during a partial collection. Though it can be |
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451 // inaccurate, it is sufficient for G1 because the conservative |
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452 // implementation of is_scavengable() for G1 will indicate that |
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453 // all nmethods must be scanned during a partial collection. |
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454 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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455 HeapRegion* hr = heap_region_containing(p); |
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456 return hr != NULL && hr->in_collection_set(); |
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457 } |
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458 #endif |
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459 |
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460 // Returns true if the reference points to an object that |
| 10405 | 461 // can move in an incremental collection. |
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462 bool G1CollectedHeap::is_scavengable(const void* p) { |
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463 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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464 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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465 HeapRegion* hr = heap_region_containing(p); |
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466 if (hr == NULL) { |
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467 // null |
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468 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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469 return false; |
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470 } else { |
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471 return !hr->isHumongous(); |
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472 } |
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473 } |
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474 |
| 342 | 475 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 476 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 12343 | 477 CardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 478 |
| 479 // Count the dirty cards at the start. | |
| 480 CountNonCleanMemRegionClosure count1(this); | |
| 481 ct_bs->mod_card_iterate(&count1); | |
| 482 int orig_count = count1.n(); | |
| 483 | |
| 484 // First clear the logged cards. | |
| 485 ClearLoggedCardTableEntryClosure clear; | |
| 486 dcqs.set_closure(&clear); | |
| 487 dcqs.apply_closure_to_all_completed_buffers(); | |
| 488 dcqs.iterate_closure_all_threads(false); | |
| 489 clear.print_histo(); | |
| 490 | |
| 491 // Now ensure that there's no dirty cards. | |
| 492 CountNonCleanMemRegionClosure count2(this); | |
| 493 ct_bs->mod_card_iterate(&count2); | |
| 494 if (count2.n() != 0) { | |
| 495 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 496 count2.n(), orig_count); | |
| 497 } | |
| 498 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 499 | |
| 500 RedirtyLoggedCardTableEntryClosure redirty; | |
| 501 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
| 502 dcqs.apply_closure_to_all_completed_buffers(); | |
| 503 dcqs.iterate_closure_all_threads(false); | |
| 504 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
| 505 clear.calls(), orig_count); | |
| 506 guarantee(redirty.calls() == clear.calls(), | |
| 507 "Or else mechanism is broken."); | |
| 508 | |
| 509 CountNonCleanMemRegionClosure count3(this); | |
| 510 ct_bs->mod_card_iterate(&count3); | |
| 511 if (count3.n() != orig_count) { | |
| 512 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 513 orig_count, count3.n()); | |
| 514 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 515 } | |
| 516 | |
| 517 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 518 } | |
| 519 | |
| 520 // Private class members. | |
| 521 | |
| 522 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 523 | |
| 524 // Private methods. | |
| 525 | |
| 2152 | 526 HeapRegion* |
| 2361 | 527 G1CollectedHeap::new_region_try_secondary_free_list() { |
| 2152 | 528 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 529 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 530 if (!_secondary_free_list.is_empty()) { | |
| 531 if (G1ConcRegionFreeingVerbose) { | |
| 532 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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533 "secondary_free_list has %u entries", |
| 2152 | 534 _secondary_free_list.length()); |
| 535 } | |
| 536 // It looks as if there are free regions available on the | |
| 537 // secondary_free_list. Let's move them to the free_list and try | |
| 538 // again to allocate from it. | |
| 539 append_secondary_free_list(); | |
| 540 | |
| 541 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
| 542 "empty we should have moved at least one entry to the free_list"); | |
| 543 HeapRegion* res = _free_list.remove_head(); | |
| 544 if (G1ConcRegionFreeingVerbose) { | |
| 545 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 546 "allocated "HR_FORMAT" from secondary_free_list", | |
| 547 HR_FORMAT_PARAMS(res)); | |
| 548 } | |
| 549 return res; | |
| 550 } | |
| 551 | |
| 10405 | 552 // Wait here until we get notified either when (a) there are no |
| 2152 | 553 // more free regions coming or (b) some regions have been moved on |
| 554 // the secondary_free_list. | |
| 555 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 556 } | |
| 557 | |
| 558 if (G1ConcRegionFreeingVerbose) { | |
| 559 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 560 "could not allocate from secondary_free_list"); | |
| 561 } | |
| 562 return NULL; | |
| 563 } | |
| 564 | |
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565 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool do_expand) { |
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566 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 567 "the only time we use this to allocate a humongous region is " |
| 568 "when we are allocating a single humongous region"); | |
| 569 | |
| 570 HeapRegion* res; | |
| 571 if (G1StressConcRegionFreeing) { | |
| 572 if (!_secondary_free_list.is_empty()) { | |
| 573 if (G1ConcRegionFreeingVerbose) { | |
| 574 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 575 "forced to look at the secondary_free_list"); | |
| 576 } | |
| 2361 | 577 res = new_region_try_secondary_free_list(); |
| 2152 | 578 if (res != NULL) { |
| 579 return res; | |
| 580 } | |
| 581 } | |
| 582 } | |
| 583 res = _free_list.remove_head_or_null(); | |
| 584 if (res == NULL) { | |
| 585 if (G1ConcRegionFreeingVerbose) { | |
| 586 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 587 "res == NULL, trying the secondary_free_list"); | |
| 588 } | |
| 2361 | 589 res = new_region_try_secondary_free_list(); |
| 2152 | 590 } |
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591 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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592 // Currently, only attempts to allocate GC alloc regions set |
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593 // do_expand to true. So, we should only reach here during a |
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594 // safepoint. If this assumption changes we might have to |
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595 // reconsider the use of _expand_heap_after_alloc_failure. |
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596 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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597 |
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598 ergo_verbose1(ErgoHeapSizing, |
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599 "attempt heap expansion", |
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600 ergo_format_reason("region allocation request failed") |
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601 ergo_format_byte("allocation request"), |
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602 word_size * HeapWordSize); |
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603 if (expand(word_size * HeapWordSize)) { |
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604 // Given that expand() succeeded in expanding the heap, and we |
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605 // always expand the heap by an amount aligned to the heap |
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606 // region size, the free list should in theory not be empty. So |
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607 // it would probably be OK to use remove_head(). But the extra |
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608 // check for NULL is unlikely to be a performance issue here (we |
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609 // just expanded the heap!) so let's just be conservative and |
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610 // use remove_head_or_null(). |
| 3766 | 611 res = _free_list.remove_head_or_null(); |
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612 } else { |
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613 _expand_heap_after_alloc_failure = false; |
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614 } |
| 342 | 615 } |
| 616 return res; | |
| 617 } | |
| 618 | |
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619 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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620 size_t word_size) { |
| 2361 | 621 assert(isHumongous(word_size), "word_size should be humongous"); |
| 622 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 623 | |
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624 uint first = G1_NULL_HRS_INDEX; |
| 2152 | 625 if (num_regions == 1) { |
| 626 // Only one region to allocate, no need to go through the slower | |
| 10405 | 627 // path. The caller will attempt the expansion if this fails, so |
| 2152 | 628 // let's not try to expand here too. |
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629 HeapRegion* hr = new_region(word_size, false /* do_expand */); |
| 2152 | 630 if (hr != NULL) { |
| 631 first = hr->hrs_index(); | |
| 632 } else { | |
| 3766 | 633 first = G1_NULL_HRS_INDEX; |
| 2152 | 634 } |
| 635 } else { | |
| 636 // We can't allocate humongous regions while cleanupComplete() is | |
| 637 // running, since some of the regions we find to be empty might not | |
| 638 // yet be added to the free list and it is not straightforward to | |
| 639 // know which list they are on so that we can remove them. Note | |
| 640 // that we only need to do this if we need to allocate more than | |
| 641 // one region to satisfy the current humongous allocation | |
| 642 // request. If we are only allocating one region we use the common | |
| 643 // region allocation code (see above). | |
| 644 wait_while_free_regions_coming(); | |
| 2361 | 645 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 646 |
| 647 if (free_regions() >= num_regions) { | |
| 3766 | 648 first = _hrs.find_contiguous(num_regions); |
| 649 if (first != G1_NULL_HRS_INDEX) { | |
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650 for (uint i = first; i < first + num_regions; ++i) { |
| 3766 | 651 HeapRegion* hr = region_at(i); |
| 2152 | 652 assert(hr->is_empty(), "sanity"); |
| 2361 | 653 assert(is_on_master_free_list(hr), "sanity"); |
| 2152 | 654 hr->set_pending_removal(true); |
| 655 } | |
| 656 _free_list.remove_all_pending(num_regions); | |
| 657 } | |
| 658 } | |
| 659 } | |
| 660 return first; | |
| 661 } | |
| 662 | |
| 2361 | 663 HeapWord* |
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664 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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665 uint num_regions, |
| 2361 | 666 size_t word_size) { |
| 3766 | 667 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
| 2361 | 668 assert(isHumongous(word_size), "word_size should be humongous"); |
| 669 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 670 | |
| 671 // Index of last region in the series + 1. | |
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672 uint last = first + num_regions; |
| 2361 | 673 |
| 674 // We need to initialize the region(s) we just discovered. This is | |
| 675 // a bit tricky given that it can happen concurrently with | |
| 676 // refinement threads refining cards on these regions and | |
| 677 // potentially wanting to refine the BOT as they are scanning | |
| 678 // those cards (this can happen shortly after a cleanup; see CR | |
| 679 // 6991377). So we have to set up the region(s) carefully and in | |
| 680 // a specific order. | |
| 681 | |
| 682 // The word size sum of all the regions we will allocate. | |
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683 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 684 assert(word_size <= word_size_sum, "sanity"); |
| 685 | |
| 686 // This will be the "starts humongous" region. | |
| 3766 | 687 HeapRegion* first_hr = region_at(first); |
| 2361 | 688 // The header of the new object will be placed at the bottom of |
| 689 // the first region. | |
| 690 HeapWord* new_obj = first_hr->bottom(); | |
| 691 // This will be the new end of the first region in the series that | |
| 10405 | 692 // should also match the end of the last region in the series. |
| 2361 | 693 HeapWord* new_end = new_obj + word_size_sum; |
| 694 // This will be the new top of the first region that will reflect | |
| 695 // this allocation. | |
| 696 HeapWord* new_top = new_obj + word_size; | |
| 697 | |
| 698 // First, we need to zero the header of the space that we will be | |
| 699 // allocating. When we update top further down, some refinement | |
| 700 // threads might try to scan the region. By zeroing the header we | |
| 701 // ensure that any thread that will try to scan the region will | |
| 702 // come across the zero klass word and bail out. | |
| 703 // | |
| 704 // NOTE: It would not have been correct to have used | |
| 705 // CollectedHeap::fill_with_object() and make the space look like | |
| 706 // an int array. The thread that is doing the allocation will | |
| 707 // later update the object header to a potentially different array | |
| 708 // type and, for a very short period of time, the klass and length | |
| 709 // fields will be inconsistent. This could cause a refinement | |
| 710 // thread to calculate the object size incorrectly. | |
| 711 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 712 | |
| 713 // We will set up the first region as "starts humongous". This | |
| 714 // will also update the BOT covering all the regions to reflect | |
| 715 // that there is a single object that starts at the bottom of the | |
| 716 // first region. | |
| 717 first_hr->set_startsHumongous(new_top, new_end); | |
| 718 | |
| 719 // Then, if there are any, we will set up the "continues | |
| 720 // humongous" regions. | |
| 721 HeapRegion* hr = NULL; | |
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722 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 723 hr = region_at(i); |
| 2361 | 724 hr->set_continuesHumongous(first_hr); |
| 725 } | |
| 726 // If we have "continues humongous" regions (hr != NULL), then the | |
| 727 // end of the last one should match new_end. | |
| 728 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 729 | |
| 730 // Up to this point no concurrent thread would have been able to | |
| 731 // do any scanning on any region in this series. All the top | |
| 732 // fields still point to bottom, so the intersection between | |
| 733 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 734 // update the top fields, we'll do a storestore to make sure that | |
| 735 // no thread sees the update to top before the zeroing of the | |
| 736 // object header and the BOT initialization. | |
| 737 OrderAccess::storestore(); | |
| 738 | |
| 739 // Now that the BOT and the object header have been initialized, | |
| 740 // we can update top of the "starts humongous" region. | |
| 741 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 742 "new_top should be in this region"); | |
| 743 first_hr->set_top(new_top); | |
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744 if (_hr_printer.is_active()) { |
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745 HeapWord* bottom = first_hr->bottom(); |
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746 HeapWord* end = first_hr->orig_end(); |
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747 if ((first + 1) == last) { |
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748 // the series has a single humongous region |
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749 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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750 } else { |
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751 // the series has more than one humongous regions |
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752 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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753 } |
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754 } |
| 2361 | 755 |
| 756 // Now, we will update the top fields of the "continues humongous" | |
| 757 // regions. The reason we need to do this is that, otherwise, | |
| 758 // these regions would look empty and this will confuse parts of | |
| 759 // G1. For example, the code that looks for a consecutive number | |
| 760 // of empty regions will consider them empty and try to | |
| 761 // re-allocate them. We can extend is_empty() to also include | |
| 762 // !continuesHumongous(), but it is easier to just update the top | |
| 763 // fields here. The way we set top for all regions (i.e., top == | |
| 764 // end for all regions but the last one, top == new_top for the | |
| 765 // last one) is actually used when we will free up the humongous | |
| 766 // region in free_humongous_region(). | |
| 767 hr = NULL; | |
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768 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 769 hr = region_at(i); |
| 2361 | 770 if ((i + 1) == last) { |
| 771 // last continues humongous region | |
| 772 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 773 "new_top should fall on this region"); | |
| 774 hr->set_top(new_top); | |
|
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775 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 776 } else { |
| 777 // not last one | |
| 778 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 779 hr->set_top(hr->end()); | |
|
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780 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 781 } |
| 782 } | |
| 783 // If we have continues humongous regions (hr != NULL), then the | |
| 784 // end of the last one should match new_end and its top should | |
| 785 // match new_top. | |
| 786 assert(hr == NULL || | |
| 787 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
| 788 | |
| 789 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 790 _summary_bytes_used += first_hr->used(); | |
| 791 _humongous_set.add(first_hr); | |
| 792 | |
| 793 return new_obj; | |
| 794 } | |
| 795 | |
| 342 | 796 // If could fit into free regions w/o expansion, try. |
| 797 // Otherwise, if can expand, do so. | |
| 798 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 799 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 800 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 801 | |
| 802 verify_region_sets_optional(); | |
| 342 | 803 |
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804 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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805 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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806 uint x_num = expansion_regions(); |
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807 uint fs = _hrs.free_suffix(); |
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808 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
| 3766 | 809 if (first == G1_NULL_HRS_INDEX) { |
| 2152 | 810 // The only thing we can do now is attempt expansion. |
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811 if (fs + x_num >= num_regions) { |
|
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812 // If the number of regions we're trying to allocate for this |
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813 // object is at most the number of regions in the free suffix, |
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814 // then the call to humongous_obj_allocate_find_first() above |
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815 // should have succeeded and we wouldn't be here. |
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816 // |
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817 // We should only be trying to expand when the free suffix is |
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818 // not sufficient for the object _and_ we have some expansion |
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819 // room available. |
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820 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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821 |
|
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822 ergo_verbose1(ErgoHeapSizing, |
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823 "attempt heap expansion", |
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824 ergo_format_reason("humongous allocation request failed") |
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825 ergo_format_byte("allocation request"), |
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826 word_size * HeapWordSize); |
|
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827 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
| 3766 | 828 // Even though the heap was expanded, it might not have |
| 829 // reached the desired size. So, we cannot assume that the | |
| 830 // allocation will succeed. | |
|
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831 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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832 } |
| 2152 | 833 } |
| 834 } | |
| 835 | |
| 2361 | 836 HeapWord* result = NULL; |
| 3766 | 837 if (first != G1_NULL_HRS_INDEX) { |
| 2361 | 838 result = |
| 839 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
| 840 assert(result != NULL, "it should always return a valid result"); | |
|
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841 |
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842 // A successful humongous object allocation changes the used space |
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|
843 // information of the old generation so we need to recalculate the |
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844 // sizes and update the jstat counters here. |
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|
845 g1mm()->update_sizes(); |
| 2152 | 846 } |
| 847 | |
| 848 verify_region_sets_optional(); | |
| 2361 | 849 |
| 850 return result; | |
| 342 | 851 } |
| 852 | |
| 1973 | 853 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 854 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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855 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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856 |
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857 unsigned int dummy_gc_count_before; |
|
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858 int dummy_gclocker_retry_count = 0; |
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859 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
| 342 | 860 } |
| 861 | |
| 862 HeapWord* | |
| 863 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 864 bool* gc_overhead_limit_was_exceeded) { |
| 865 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 866 |
| 10405 | 867 // Loop until the allocation is satisfied, or unsatisfied after GC. |
|
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868 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
| 1973 | 869 unsigned int gc_count_before; |
|
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870 |
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871 HeapWord* result = NULL; |
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872 if (!isHumongous(word_size)) { |
|
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873 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
|
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874 } else { |
|
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875 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
|
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876 } |
|
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877 if (result != NULL) { |
|
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|
878 return result; |
| 342 | 879 } |
| 880 | |
| 881 // Create the garbage collection operation... | |
| 1973 | 882 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 883 // ...and get the VM thread to execute it. |
| 884 VMThread::execute(&op); | |
| 1973 | 885 |
| 886 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 887 // If the operation was successful we'll return the result even | |
| 888 // if it is NULL. If the allocation attempt failed immediately | |
| 889 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 890 HeapWord* result = op.result(); | |
| 891 if (result != NULL && !isHumongous(word_size)) { | |
| 892 // Allocations that take place on VM operations do not do any | |
| 893 // card dirtying and we have to do it here. We only have to do | |
| 894 // this for non-humongous allocations, though. | |
| 895 dirty_young_block(result, word_size); | |
| 896 } | |
| 342 | 897 return result; |
| 1973 | 898 } else { |
|
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|
899 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
|
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|
900 return NULL; |
|
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|
901 } |
| 1973 | 902 assert(op.result() == NULL, |
| 903 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 904 } |
| 905 | |
| 906 // Give a warning if we seem to be looping forever. | |
| 907 if ((QueuedAllocationWarningCount > 0) && | |
| 908 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 909 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 910 } |
| 911 } | |
| 1973 | 912 |
| 913 ShouldNotReachHere(); | |
|
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|
914 return NULL; |
| 342 | 915 } |
| 916 | |
|
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|
917 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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|
918 unsigned int *gc_count_before_ret, |
|
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|
919 int* gclocker_retry_count_ret) { |
|
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|
920 // Make sure you read the note in attempt_allocation_humongous(). |
|
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|
921 |
|
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|
922 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
923 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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924 "be called for humongous allocation requests"); |
|
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|
925 |
|
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|
926 // We should only get here after the first-level allocation attempt |
|
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|
927 // (attempt_allocation()) failed to allocate. |
|
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|
928 |
|
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|
929 // We will loop until a) we manage to successfully perform the |
|
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|
930 // allocation or b) we successfully schedule a collection which |
|
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|
931 // fails to perform the allocation. b) is the only case when we'll |
|
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|
932 // return NULL. |
|
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|
933 HeapWord* result = NULL; |
|
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|
934 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
935 bool should_try_gc; |
|
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|
936 unsigned int gc_count_before; |
|
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|
937 |
|
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938 { |
|
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|
939 MutexLockerEx x(Heap_lock); |
|
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|
940 |
|
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|
941 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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|
942 false /* bot_updates */); |
|
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|
943 if (result != NULL) { |
|
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|
944 return result; |
|
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|
945 } |
|
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|
946 |
|
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|
947 // If we reach here, attempt_allocation_locked() above failed to |
|
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|
948 // allocate a new region. So the mutator alloc region should be NULL. |
|
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|
949 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
|
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|
950 |
|
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|
951 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
952 if (g1_policy()->can_expand_young_list()) { |
|
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|
953 // No need for an ergo verbose message here, |
|
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|
954 // can_expand_young_list() does this when it returns true. |
|
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955 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
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956 false /* bot_updates */); |
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957 if (result != NULL) { |
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958 return result; |
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959 } |
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960 } |
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961 should_try_gc = false; |
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962 } else { |
|
6106
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963 // The GCLocker may not be active but the GCLocker initiated |
|
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964 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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965 // returns true). In this case we do not try this GC and |
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966 // wait until the GCLocker initiated GC is performed, and |
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967 // then retry the allocation. |
|
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968 if (GC_locker::needs_gc()) { |
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969 should_try_gc = false; |
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970 } else { |
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971 // Read the GC count while still holding the Heap_lock. |
|
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972 gc_count_before = total_collections(); |
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973 should_try_gc = true; |
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974 } |
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975 } |
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976 } |
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977 |
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978 if (should_try_gc) { |
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979 bool succeeded; |
|
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980 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
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981 GCCause::_g1_inc_collection_pause); |
|
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982 if (result != NULL) { |
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983 assert(succeeded, "only way to get back a non-NULL result"); |
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984 return result; |
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985 } |
|
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986 |
|
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987 if (succeeded) { |
|
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988 // If we get here we successfully scheduled a collection which |
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989 // failed to allocate. No point in trying to allocate |
|
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990 // further. We'll just return NULL. |
|
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991 MutexLockerEx x(Heap_lock); |
|
4910
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992 *gc_count_before_ret = total_collections(); |
|
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993 return NULL; |
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994 } |
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995 } else { |
|
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996 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
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997 MutexLockerEx x(Heap_lock); |
|
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998 *gc_count_before_ret = total_collections(); |
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999 return NULL; |
|
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1000 } |
|
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1001 // The GCLocker is either active or the GCLocker initiated |
|
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1002 // GC has not yet been performed. Stall until it is and |
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1003 // then retry the allocation. |
|
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1004 GC_locker::stall_until_clear(); |
|
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1005 (*gclocker_retry_count_ret) += 1; |
|
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1006 } |
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1007 |
| 10405 | 1008 // We can reach here if we were unsuccessful in scheduling a |
|
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1009 // collection (because another thread beat us to it) or if we were |
|
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1010 // stalled due to the GC locker. In either can we should retry the |
|
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1011 // allocation attempt in case another thread successfully |
|
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1012 // performed a collection and reclaimed enough space. We do the |
|
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1013 // first attempt (without holding the Heap_lock) here and the |
|
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1014 // follow-on attempt will be at the start of the next loop |
|
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1015 // iteration (after taking the Heap_lock). |
|
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1016 result = _mutator_alloc_region.attempt_allocation(word_size, |
|
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1017 false /* bot_updates */); |
|
5963
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1018 if (result != NULL) { |
|
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1019 return result; |
|
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1020 } |
|
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|
1021 |
|
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|
1022 // Give a warning if we seem to be looping forever. |
|
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1023 if ((QueuedAllocationWarningCount > 0) && |
|
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1024 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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|
1025 warning("G1CollectedHeap::attempt_allocation_slow() " |
|
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|
1026 "retries %d times", try_count); |
|
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|
1027 } |
|
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|
1028 } |
|
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|
1029 |
|
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|
1030 ShouldNotReachHere(); |
|
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|
1031 return NULL; |
|
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|
1032 } |
|
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|
1033 |
|
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|
1034 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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1035 unsigned int * gc_count_before_ret, |
|
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1036 int* gclocker_retry_count_ret) { |
|
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|
1037 // The structure of this method has a lot of similarities to |
|
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|
1038 // attempt_allocation_slow(). The reason these two were not merged |
|
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1039 // into a single one is that such a method would require several "if |
|
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1040 // allocation is not humongous do this, otherwise do that" |
|
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|
1041 // conditional paths which would obscure its flow. In fact, an early |
|
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1042 // version of this code did use a unified method which was harder to |
|
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1043 // follow and, as a result, it had subtle bugs that were hard to |
|
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1044 // track down. So keeping these two methods separate allows each to |
|
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|
1045 // be more readable. It will be good to keep these two in sync as |
|
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|
1046 // much as possible. |
|
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|
1047 |
|
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|
1048 assert_heap_not_locked_and_not_at_safepoint(); |
|
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1049 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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1050 "should only be called for humongous allocations"); |
|
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|
1051 |
|
4834
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7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1052 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
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|
1053 // need to start a marking cycle at each humongous object allocation. We do |
|
6a78aa6ac1ff
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|
1054 // the check before we do the actual allocation. The reason for doing it |
|
6a78aa6ac1ff
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|
1055 // before the allocation is that we avoid having to keep track of the newly |
|
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|
1056 // allocated memory while we do a GC. |
|
4910
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|
1057 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
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|
1058 word_size)) { |
|
4834
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|
1059 collect(GCCause::_g1_humongous_allocation); |
|
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|
1060 } |
|
6a78aa6ac1ff
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|
1061 |
|
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|
1062 // We will loop until a) we manage to successfully perform the |
|
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|
1063 // allocation or b) we successfully schedule a collection which |
|
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|
1064 // fails to perform the allocation. b) is the only case when we'll |
|
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|
1065 // return NULL. |
|
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|
1066 HeapWord* result = NULL; |
|
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|
1067 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
1068 bool should_try_gc; |
|
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|
1069 unsigned int gc_count_before; |
|
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|
1070 |
|
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1071 { |
|
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1072 MutexLockerEx x(Heap_lock); |
|
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1073 |
|
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1074 // Given that humongous objects are not allocated in young |
|
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1075 // regions, we'll first try to do the allocation without doing a |
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1076 // collection hoping that there's enough space in the heap. |
|
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1077 result = humongous_obj_allocate(word_size); |
|
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1078 if (result != NULL) { |
|
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1079 return result; |
|
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1080 } |
|
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1081 |
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1082 if (GC_locker::is_active_and_needs_gc()) { |
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1083 should_try_gc = false; |
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1084 } else { |
|
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1085 // The GCLocker may not be active but the GCLocker initiated |
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1086 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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1087 // returns true). In this case we do not try this GC and |
|
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1088 // wait until the GCLocker initiated GC is performed, and |
|
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1089 // then retry the allocation. |
|
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1090 if (GC_locker::needs_gc()) { |
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1091 should_try_gc = false; |
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1092 } else { |
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1093 // Read the GC count while still holding the Heap_lock. |
|
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1094 gc_count_before = total_collections(); |
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1095 should_try_gc = true; |
|
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1096 } |
|
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1097 } |
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1098 } |
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1099 |
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1100 if (should_try_gc) { |
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1101 // If we failed to allocate the humongous object, we should try to |
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1102 // do a collection pause (if we're allowed) in case it reclaims |
|
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1103 // enough space for the allocation to succeed after the pause. |
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1104 |
|
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1105 bool succeeded; |
|
12113
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|
1106 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
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1107 GCCause::_g1_humongous_allocation); |
|
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1108 if (result != NULL) { |
|
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1109 assert(succeeded, "only way to get back a non-NULL result"); |
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1110 return result; |
|
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1111 } |
|
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1112 |
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1113 if (succeeded) { |
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1114 // If we get here we successfully scheduled a collection which |
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1115 // failed to allocate. No point in trying to allocate |
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1116 // further. We'll just return NULL. |
|
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1117 MutexLockerEx x(Heap_lock); |
|
4910
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1118 *gc_count_before_ret = total_collections(); |
|
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1119 return NULL; |
|
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1120 } |
|
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1121 } else { |
|
8853
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1122 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
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1123 MutexLockerEx x(Heap_lock); |
|
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1124 *gc_count_before_ret = total_collections(); |
|
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1125 return NULL; |
|
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1126 } |
|
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1127 // The GCLocker is either active or the GCLocker initiated |
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1128 // GC has not yet been performed. Stall until it is and |
|
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1129 // then retry the allocation. |
|
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1130 GC_locker::stall_until_clear(); |
|
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1131 (*gclocker_retry_count_ret) += 1; |
|
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1132 } |
|
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|
1133 |
| 10405 | 1134 // We can reach here if we were unsuccessful in scheduling a |
|
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1135 // collection (because another thread beat us to it) or if we were |
|
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1136 // stalled due to the GC locker. In either can we should retry the |
|
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1137 // allocation attempt in case another thread successfully |
|
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1138 // performed a collection and reclaimed enough space. Give a |
|
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1139 // warning if we seem to be looping forever. |
|
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1140 |
|
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1141 if ((QueuedAllocationWarningCount > 0) && |
|
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1142 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1143 warning("G1CollectedHeap::attempt_allocation_humongous() " |
|
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1144 "retries %d times", try_count); |
|
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|
1145 } |
|
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|
1146 } |
|
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1147 |
|
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|
1148 ShouldNotReachHere(); |
|
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|
1149 return NULL; |
|
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|
1150 } |
|
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1151 |
|
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1152 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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|
1153 bool expect_null_mutator_alloc_region) { |
| 2152 | 1154 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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|
1155 assert(_mutator_alloc_region.get() == NULL || |
|
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|
1156 !expect_null_mutator_alloc_region, |
|
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|
1157 "the current alloc region was unexpectedly found to be non-NULL"); |
|
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|
1158 |
|
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|
1159 if (!isHumongous(word_size)) { |
|
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1160 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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1161 false /* bot_updates */); |
|
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|
1162 } else { |
|
4829
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|
1163 HeapWord* result = humongous_obj_allocate(word_size); |
|
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|
1164 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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|
1165 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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|
1166 } |
|
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|
1167 return result; |
|
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|
1168 } |
|
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|
1169 |
|
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|
1170 ShouldNotReachHere(); |
| 342 | 1171 } |
| 1172 | |
| 1173 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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1174 G1CollectedHeap* _g1h; |
| 342 | 1175 ModRefBarrierSet* _mr_bs; |
| 1176 public: | |
|
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1177 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
| 12080 | 1178 _g1h(g1h), _mr_bs(mr_bs) {} |
| 1179 | |
| 342 | 1180 bool doHeapRegion(HeapRegion* r) { |
| 12080 | 1181 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1182 | |
|
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|
1183 if (r->continuesHumongous()) { |
| 12080 | 1184 // We'll assert that the strong code root list and RSet is empty |
| 1185 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
| 1186 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
| 342 | 1187 return false; |
|
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1188 } |
| 12080 | 1189 |
|
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|
1190 _g1h->reset_gc_time_stamps(r); |
| 12080 | 1191 hrrs->clear(); |
| 342 | 1192 // You might think here that we could clear just the cards |
| 1193 // corresponding to the used region. But no: if we leave a dirty card | |
| 1194 // in a region we might allocate into, then it would prevent that card | |
| 1195 // from being enqueued, and cause it to be missed. | |
| 1196 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1197 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 12080 | 1198 |
| 342 | 1199 return false; |
| 1200 } | |
| 1201 }; | |
| 1202 | |
|
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|
1203 void G1CollectedHeap::clear_rsets_post_compaction() { |
| 12343 | 1204 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
|
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|
1205 heap_region_iterate(&rs_clear); |
|
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|
1206 } |
| 342 | 1207 |
|
626
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|
1208 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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|
1209 G1CollectedHeap* _g1h; |
|
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|
1210 UpdateRSOopClosure _cl; |
|
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|
1211 int _worker_i; |
|
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|
1212 public: |
|
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|
1213 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1214 _cl(g1->g1_rem_set(), worker_i), |
|
626
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1215 _worker_i(worker_i), |
|
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|
1216 _g1h(g1) |
|
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|
1217 { } |
|
1960
878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
johnc
parents:
1883
diff
changeset
|
1218 |
|
626
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|
1219 bool doHeapRegion(HeapRegion* r) { |
|
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1220 if (!r->continuesHumongous()) { |
|
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|
1221 _cl.set_from(r); |
|
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|
1222 r->oop_iterate(&_cl); |
|
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|
1223 } |
|
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|
1224 return false; |
|
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|
1225 } |
|
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|
1226 }; |
|
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|
1227 |
|
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|
1228 class ParRebuildRSTask: public AbstractGangTask { |
|
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1229 G1CollectedHeap* _g1; |
|
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|
1230 public: |
|
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|
1231 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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1232 : AbstractGangTask("ParRebuildRSTask"), |
|
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1233 _g1(g1) |
|
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|
1234 { } |
|
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|
1235 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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changeset
|
1236 void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
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|
1237 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
441e946dc1af
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|
1238 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
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|
1239 _g1->workers()->active_workers(), |
|
626
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|
1240 HeapRegion::RebuildRSClaimValue); |
|
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|
1241 } |
|
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|
1242 }; |
|
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|
1243 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
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|
1244 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
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1245 private: |
|
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|
1246 G1HRPrinter* _hr_printer; |
|
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1247 public: |
|
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|
1248 bool doHeapRegion(HeapRegion* hr) { |
|
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|
1249 assert(!hr->is_young(), "not expecting to find young regions"); |
|
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1250 // We only generate output for non-empty regions. |
|
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1251 if (!hr->is_empty()) { |
|
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|
1252 if (!hr->isHumongous()) { |
|
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|
1253 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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|
1254 } else if (hr->startsHumongous()) { |
|
6254
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changeset
|
1255 if (hr->region_num() == 1) { |
|
3778
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|
1256 // single humongous region |
|
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|
1257 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
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|
1258 } else { |
|
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|
1259 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
5f6f2615433a
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|
1260 } |
|
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|
1261 } else { |
|
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|
1262 assert(hr->continuesHumongous(), "only way to get here"); |
|
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|
1263 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
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|
1264 } |
|
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|
1265 } |
|
5f6f2615433a
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|
1266 return false; |
|
5f6f2615433a
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parents:
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|
1267 } |
|
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|
1268 |
|
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|
1269 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
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|
1270 : _hr_printer(hr_printer) { } |
|
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|
1271 }; |
|
5f6f2615433a
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tonyp
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changeset
|
1272 |
|
6254
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changeset
|
1273 void G1CollectedHeap::print_hrs_post_compaction() { |
|
a2f7274eb6ef
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changeset
|
1274 PostCompactionPrinterClosure cl(hr_printer()); |
|
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parents:
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changeset
|
1275 heap_region_iterate(&cl); |
|
a2f7274eb6ef
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|
1276 } |
|
a2f7274eb6ef
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|
1277 |
| 1973 | 1278 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1279 bool clear_all_soft_refs, |
| 342 | 1280 size_t word_size) { |
| 2152 | 1281 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1282 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1283 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1284 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1285 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1286 |
| 10405 | 1287 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
|
1288 gc_timer->register_gc_start(); |
| 10405 | 1289 |
| 1290 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
| 1291 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
| 1292 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1293 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1294 ResourceMark rm; |
| 1295 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
1296 print_heap_before_gc(); |
| 10405 | 1297 trace_heap_before_gc(gc_tracer); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1298 |
|
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10182
diff
changeset
|
1299 size_t metadata_prev_used = MetaspaceAux::allocated_used_bytes(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1300 |
| 2152 | 1301 verify_region_sets_optional(); |
| 342 | 1302 |
|
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1303 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
|
1304 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
|
1305 |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1306 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
|
1307 |
| 342 | 1308 { |
| 1309 IsGCActiveMark x; | |
| 1310 | |
| 1311 // Timing | |
| 6030 | 1312 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
|
1313 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
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diff
changeset
|
1314 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1315 |
| 342 | 1316 { |
| 10405 | 1317 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL); |
|
10098
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|
1318 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
71013d764f6e
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|
1319 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
71013d764f6e
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|
1320 |
|
71013d764f6e
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changeset
|
1321 double start = os::elapsedTime(); |
|
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changeset
|
1322 g1_policy()->record_full_collection_start(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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|
1323 |
|
71013d764f6e
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|
1324 // Note: When we have a more flexible GC logging framework that |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1325 // allows us to add optional attributes to a GC log record we |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1326 // 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:
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diff
changeset
|
1327 // following two methods. |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1328 wait_while_free_regions_coming(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1329 // If we start the compaction before the CM threads finish |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1330 // 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
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diff
changeset
|
1331 // be moving objects / updating references. So let's wait until |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1332 // they are done. By telling them to abort, they should complete |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
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|
1333 // early. |
|
71013d764f6e
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|
1334 _cm->root_regions()->abort(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1335 _cm->root_regions()->wait_until_scan_finished(); |
|
71013d764f6e
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diff
changeset
|
1336 append_secondary_free_list_if_not_empty_with_lock(); |
|
71013d764f6e
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|
1337 |
|
71013d764f6e
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changeset
|
1338 gc_prologue(true); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1339 increment_total_collections(true /* full gc */); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1340 increment_old_marking_cycles_started(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1341 |
|
71013d764f6e
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diff
changeset
|
1342 assert(used() == recalculate_used(), "Should be equal"); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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|
1343 |
|
71013d764f6e
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diff
changeset
|
1344 verify_before_gc(); |
|
71013d764f6e
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diff
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|
1345 |
| 10405 | 1346 pre_full_gc_dump(gc_timer); |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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|
1347 |
|
71013d764f6e
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parents:
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diff
changeset
|
1348 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
71013d764f6e
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1349 |
|
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1350 // Disable discovery and empty the discovered lists |
|
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1351 // for the CM ref processor. |
|
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1352 ref_processor_cm()->disable_discovery(); |
|
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1353 ref_processor_cm()->abandon_partial_discovery(); |
|
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1354 ref_processor_cm()->verify_no_references_recorded(); |
|
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1355 |
|
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|
1356 // Abandon current iterations of concurrent marking and concurrent |
|
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1357 // refinement, if any are in progress. We have to do this before |
|
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1358 // wait_until_scan_finished() below. |
|
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|
1359 concurrent_mark()->abort(); |
|
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1360 |
|
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|
1361 // Make sure we'll choose a new allocation region afterwards. |
|
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1362 release_mutator_alloc_region(); |
|
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1363 abandon_gc_alloc_regions(); |
|
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1364 g1_rem_set()->cleanupHRRS(); |
|
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1365 |
|
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1366 // We should call this after we retire any currently active alloc |
|
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1367 // regions so that all the ALLOC / RETIRE events are generated |
|
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1368 // before the start GC event. |
|
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1369 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
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1370 |
|
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1371 // We may have added regions to the current incremental collection |
|
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1372 // set between the last GC or pause and now. We need to clear the |
|
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1373 // incremental collection set and then start rebuilding it afresh |
|
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1374 // after this full GC. |
|
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1375 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
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1376 g1_policy()->clear_incremental_cset(); |
|
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|
1377 g1_policy()->stop_incremental_cset_building(); |
|
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1378 |
|
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|
1379 tear_down_region_sets(false /* free_list_only */); |
|
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|
1380 g1_policy()->set_gcs_are_young(true); |
|
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|
1381 |
|
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1382 // See the comments in g1CollectedHeap.hpp and |
|
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1383 // G1CollectedHeap::ref_processing_init() about |
|
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1384 // how reference processing currently works in G1. |
|
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|
1385 |
|
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|
1386 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
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|
1387 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
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|
1388 |
|
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|
1389 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
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|
1390 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
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|
1391 |
|
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|
1392 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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|
1393 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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|
1394 |
|
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|
1395 // Do collection work |
|
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|
1396 { |
|
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|
1397 HandleMark hm; // Discard invalid handles created during gc |
|
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|
1398 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
|
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|
1399 } |
|
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|
1400 |
|
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|
1401 assert(free_regions() == 0, "we should not have added any free regions"); |
|
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|
1402 rebuild_region_sets(false /* free_list_only */); |
|
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|
1403 |
|
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|
1404 // Enqueue any discovered reference objects that have |
|
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|
1405 // not been removed from the discovered lists. |
|
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|
1406 ref_processor_stw()->enqueue_discovered_references(); |
|
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|
1407 |
|
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|
1408 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
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|
1409 |
|
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|
1410 MemoryService::track_memory_usage(); |
|
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|
1411 |
|
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|
1412 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
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|
1413 ref_processor_stw()->verify_no_references_recorded(); |
|
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|
1414 |
|
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|
1415 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
|
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|
1416 ClassLoaderDataGraph::purge(); |
| 12080 | 1417 MetaspaceAux::verify_metrics(); |
|
10098
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|
1418 |
|
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|
1419 // Note: since we've just done a full GC, concurrent |
|
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1420 // marking is no longer active. Therefore we need not |
|
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|
1421 // re-enable reference discovery for the CM ref processor. |
|
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|
1422 // That will be done at the start of the next marking cycle. |
|
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|
1423 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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|
1424 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1425 |
|
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|
1426 reset_gc_time_stamp(); |
|
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|
1427 // Since everything potentially moved, we will clear all remembered |
| 10405 | 1428 // sets, and clear all cards. Later we will rebuild remembered |
|
10098
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1429 // sets. We will also reset the GC time stamps of the regions. |
|
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|
1430 clear_rsets_post_compaction(); |
|
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|
1431 check_gc_time_stamps(); |
|
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|
1432 |
|
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|
1433 // Resize the heap if necessary. |
|
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|
1434 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
|
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|
1435 |
|
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|
1436 if (_hr_printer.is_active()) { |
|
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|
1437 // We should do this after we potentially resize the heap so |
|
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|
1438 // that all the COMMIT / UNCOMMIT events are generated before |
|
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|
1439 // the end GC event. |
|
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|
1440 |
|
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|
1441 print_hrs_post_compaction(); |
|
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|
1442 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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|
1443 } |
|
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|
1444 |
|
10246
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|
1445 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
194f52aa2f23
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|
1446 if (hot_card_cache->use_cache()) { |
|
194f52aa2f23
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|
1447 hot_card_cache->reset_card_counts(); |
|
194f52aa2f23
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|
1448 hot_card_cache->reset_hot_cache(); |
|
10098
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|
1449 } |
|
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|
1450 |
|
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|
1451 // Rebuild remembered sets of all regions. |
|
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|
1452 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
1453 uint n_workers = |
|
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|
1454 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1455 workers()->active_workers(), |
|
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|
1456 Threads::number_of_non_daemon_threads()); |
|
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|
1457 assert(UseDynamicNumberOfGCThreads || |
|
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|
1458 n_workers == workers()->total_workers(), |
|
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|
1459 "If not dynamic should be using all the workers"); |
|
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|
1460 workers()->set_active_workers(n_workers); |
|
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|
1461 // Set parallel threads in the heap (_n_par_threads) only |
|
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|
1462 // before a parallel phase and always reset it to 0 after |
|
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|
1463 // the phase so that the number of parallel threads does |
|
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|
1464 // no get carried forward to a serial phase where there |
|
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|
1465 // may be code that is "possibly_parallel". |
|
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|
1466 set_par_threads(n_workers); |
|
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|
1467 |
|
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|
1468 ParRebuildRSTask rebuild_rs_task(this); |
|
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|
1469 assert(check_heap_region_claim_values( |
|
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|
1470 HeapRegion::InitialClaimValue), "sanity check"); |
|
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|
1471 assert(UseDynamicNumberOfGCThreads || |
|
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|
1472 workers()->active_workers() == workers()->total_workers(), |
|
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|
1473 "Unless dynamic should use total workers"); |
|
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|
1474 // Use the most recent number of active workers |
|
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|
1475 assert(workers()->active_workers() > 0, |
|
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1476 "Active workers not properly set"); |
|
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|
1477 set_par_threads(workers()->active_workers()); |
|
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|
1478 workers()->run_task(&rebuild_rs_task); |
|
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|
1479 set_par_threads(0); |
|
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|
1480 assert(check_heap_region_claim_values( |
|
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|
1481 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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|
1482 reset_heap_region_claim_values(); |
|
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1483 } else { |
|
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|
1484 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1485 heap_region_iterate(&rebuild_rs); |
|
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1486 } |
|
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|
1487 |
| 12080 | 1488 // Rebuild the strong code root lists for each region |
| 1489 rebuild_strong_code_roots(); | |
| 1490 | |
|
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|
1491 if (true) { // FIXME |
|
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|
1492 MetaspaceGC::compute_new_size(); |
|
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|
1493 } |
| 342 | 1494 |
|
546
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|
1495 #ifdef TRACESPINNING |
|
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|
1496 ParallelTaskTerminator::print_termination_counts(); |
|
546
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|
1497 #endif |
|
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|
1498 |
|
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|
1499 // Discard all rset updates |
|
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|
1500 JavaThread::dirty_card_queue_set().abandon_logs(); |
|
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|
1501 assert(!G1DeferredRSUpdate |
|
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1502 || (G1DeferredRSUpdate && |
|
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|
1503 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
|
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|
1504 |
|
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|
1505 _young_list->reset_sampled_info(); |
|
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|
1506 // At this point there should be no regions in the |
|
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|
1507 // entire heap tagged as young. |
|
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|
1508 assert(check_young_list_empty(true /* check_heap */), |
|
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|
1509 "young list should be empty at this point"); |
|
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|
1510 |
|
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|
1511 // Update the number of full collections that have been completed. |
|
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|
1512 increment_old_marking_cycles_completed(false /* concurrent */); |
|
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|
1513 |
|
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|
1514 _hrs.verify_optional(); |
|
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|
1515 verify_region_sets_optional(); |
|
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|
1516 |
|
10373
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|
1517 verify_after_gc(); |
|
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|
1518 |
|
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1519 // Start a new incremental collection set for the next pause |
|
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|
1520 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
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|
1521 g1_policy()->start_incremental_cset_building(); |
|
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|
1522 |
|
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1523 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
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|
1524 // regions to the incremental collection set for the next |
|
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|
1525 // evacuation pause. |
|
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|
1526 clear_cset_fast_test(); |
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|
1527 |
|
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|
1528 init_mutator_alloc_region(); |
|
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|
1529 |
|
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|
1530 double end = os::elapsedTime(); |
|
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|
1531 g1_policy()->record_full_collection_end(); |
|
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|
1532 |
|
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|
1533 if (G1Log::fine()) { |
|
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|
1534 g1_policy()->print_heap_transition(); |
|
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|
1535 } |
|
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|
1536 |
|
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1537 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
|
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|
1538 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
|
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|
1539 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
|
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1540 // before any GC notifications are raised. |
|
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|
1541 g1mm()->update_sizes(); |
|
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|
1542 |
|
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|
1543 gc_epilogue(true); |
|
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|
1544 } |
|
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1545 |
|
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|
1546 if (G1Log::finer()) { |
|
10291
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|
1547 g1_policy()->print_detailed_heap_transition(true /* full */); |
|
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|
1548 } |
|
6121
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|
1549 |
|
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|
1550 print_heap_after_gc(); |
| 10405 | 1551 trace_heap_after_gc(gc_tracer); |
| 1552 | |
| 1553 post_full_gc_dump(gc_timer); | |
| 1554 | |
|
13400
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|
1555 gc_timer->register_gc_end(); |
| 10405 | 1556 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
|
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|
1557 } |
| 1973 | 1558 |
| 1559 return true; | |
| 342 | 1560 } |
| 1561 | |
| 1562 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1563 // do_collection() will return whether it succeeded in performing |
| 1564 // the GC. Currently, there is no facility on the | |
| 1565 // do_full_collection() API to notify the caller than the collection | |
| 1566 // did not succeed (e.g., because it was locked out by the GC | |
| 1567 // locker). So, right now, we'll ignore the return value. | |
| 1568 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1569 clear_all_soft_refs, | |
| 1570 0 /* word_size */); | |
| 342 | 1571 } |
| 1572 | |
| 1573 // This code is mostly copied from TenuredGeneration. | |
| 1574 void | |
| 1575 G1CollectedHeap:: | |
| 1576 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1577 // Include the current allocation, if any, and bytes that will be | |
| 1578 // pre-allocated to support collections, as "used". | |
| 1579 const size_t used_after_gc = used(); | |
| 1580 const size_t capacity_after_gc = capacity(); | |
| 1581 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1582 | |
|
1717
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|
1583 // This is enforced in arguments.cpp. |
|
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|
1584 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
|
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|
1585 "otherwise the code below doesn't make sense"); |
|
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|
1586 |
| 342 | 1587 // We don't have floating point command-line arguments |
|
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|
1588 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1589 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
1717
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|
1590 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1591 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1592 | |
|
1717
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|
1593 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
|
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|
1594 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
|
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|
1595 |
|
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|
1596 // We have to be careful here as these two calculations can overflow |
|
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|
1597 // 32-bit size_t's. |
|
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|
1598 double used_after_gc_d = (double) used_after_gc; |
|
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|
1599 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
|
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|
1600 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
|
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|
1601 |
|
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|
1602 // Let's make sure that they are both under the max heap size, which |
|
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|
1603 // by default will make them fit into a size_t. |
|
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|
1604 double desired_capacity_upper_bound = (double) max_heap_size; |
|
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|
1605 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
|
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|
1606 desired_capacity_upper_bound); |
|
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|
1607 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
|
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|
1608 desired_capacity_upper_bound); |
|
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|
1609 |
|
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|
1610 // We can now safely turn them into size_t's. |
|
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1611 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1612 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1613 |
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1614 // This assert only makes sense here, before we adjust them |
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1615 // with respect to the min and max heap size. |
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1616 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1617 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1618 "maximum_desired_capacity = "SIZE_FORMAT, |
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1619 minimum_desired_capacity, maximum_desired_capacity)); |
|
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1620 |
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1621 // Should not be greater than the heap max size. No need to adjust |
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1622 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1623 // we'll try to make the capacity larger than it, not smaller). |
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1624 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1625 // Should not be less than the heap min size. No need to adjust it |
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1626 // with respect to the heap max size as it's an upper bound (i.e., |
|
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1627 // we'll try to make the capacity smaller than it, not greater). |
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1628 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1629 |
|
1717
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1630 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1631 // Don't expand unless it's significant |
| 1632 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1633 ergo_verbose4(ErgoHeapSizing, |
|
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1634 "attempt heap expansion", |
|
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1635 ergo_format_reason("capacity lower than " |
|
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1636 "min desired capacity after Full GC") |
|
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1637 ergo_format_byte("capacity") |
|
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1638 ergo_format_byte("occupancy") |
|
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1639 ergo_format_byte_perc("min desired capacity"), |
|
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1640 capacity_after_gc, used_after_gc, |
|
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|
1641 minimum_desired_capacity, (double) MinHeapFreeRatio); |
|
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1642 expand(expand_bytes); |
| 342 | 1643 |
| 1644 // No expansion, now see if we want to shrink | |
|
1717
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1645 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1646 // Capacity too large, compute shrinking size |
| 1647 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1648 ergo_verbose4(ErgoHeapSizing, |
|
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1649 "attempt heap shrinking", |
|
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1650 ergo_format_reason("capacity higher than " |
|
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|
1651 "max desired capacity after Full GC") |
|
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|
1652 ergo_format_byte("capacity") |
|
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|
1653 ergo_format_byte("occupancy") |
|
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1654 ergo_format_byte_perc("max desired capacity"), |
|
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1655 capacity_after_gc, used_after_gc, |
|
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|
1656 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1657 shrink(shrink_bytes); |
| 1658 } | |
| 1659 } | |
| 1660 | |
| 1661 | |
| 1662 HeapWord* | |
| 1973 | 1663 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1664 bool* succeeded) { | |
| 2152 | 1665 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1666 |
| 1667 *succeeded = true; | |
| 1668 // Let's attempt the allocation first. | |
|
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1669 HeapWord* result = |
|
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1670 attempt_allocation_at_safepoint(word_size, |
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|
1671 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1672 if (result != NULL) { |
| 1673 assert(*succeeded, "sanity"); | |
| 1674 return result; | |
| 1675 } | |
| 342 | 1676 |
| 1677 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1678 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1679 // expansion over collection. (This might change in the future if we can | |
| 1680 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1681 result = expand_and_allocate(word_size); | |
| 1682 if (result != NULL) { | |
| 1973 | 1683 assert(*succeeded, "sanity"); |
| 342 | 1684 return result; |
| 1685 } | |
| 1686 | |
| 1973 | 1687 // Expansion didn't work, we'll try to do a Full GC. |
| 1688 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1689 false, /* clear_all_soft_refs */ | |
| 1690 word_size); | |
| 1691 if (!gc_succeeded) { | |
| 1692 *succeeded = false; | |
| 1693 return NULL; | |
| 1694 } | |
| 1695 | |
| 1696 // Retry the allocation | |
| 1697 result = attempt_allocation_at_safepoint(word_size, | |
|
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|
1698 true /* expect_null_mutator_alloc_region */); |
| 342 | 1699 if (result != NULL) { |
| 1973 | 1700 assert(*succeeded, "sanity"); |
| 342 | 1701 return result; |
| 1702 } | |
| 1703 | |
| 1973 | 1704 // Then, try a Full GC that will collect all soft references. |
| 1705 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1706 true, /* clear_all_soft_refs */ | |
| 1707 word_size); | |
| 1708 if (!gc_succeeded) { | |
| 1709 *succeeded = false; | |
| 1710 return NULL; | |
| 1711 } | |
| 1712 | |
| 1713 // Retry the allocation once more | |
| 1714 result = attempt_allocation_at_safepoint(word_size, | |
|
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|
1715 true /* expect_null_mutator_alloc_region */); |
| 342 | 1716 if (result != NULL) { |
| 1973 | 1717 assert(*succeeded, "sanity"); |
| 342 | 1718 return result; |
| 1719 } | |
| 1720 | |
|
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1721 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1722 "Flag should have been handled and cleared prior to this point"); |
|
1387
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1723 |
| 342 | 1724 // What else? We might try synchronous finalization later. If the total |
| 1725 // space available is large enough for the allocation, then a more | |
| 1726 // complete compaction phase than we've tried so far might be | |
| 1727 // appropriate. | |
| 1973 | 1728 assert(*succeeded, "sanity"); |
| 342 | 1729 return NULL; |
| 1730 } | |
| 1731 | |
| 1732 // Attempting to expand the heap sufficiently | |
| 1733 // to support an allocation of the given "word_size". If | |
| 1734 // successful, perform the allocation and return the address of the | |
| 1735 // allocated block, or else "NULL". | |
| 1736 | |
| 1737 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1738 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1739 | |
| 1740 verify_region_sets_optional(); | |
| 1973 | 1741 |
|
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1742 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1743 ergo_verbose1(ErgoHeapSizing, |
|
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|
1744 "attempt heap expansion", |
|
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|
1745 ergo_format_reason("allocation request failed") |
|
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|
1746 ergo_format_byte("allocation request"), |
|
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1747 word_size * HeapWordSize); |
|
2188
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1748 if (expand(expand_bytes)) { |
| 3766 | 1749 _hrs.verify_optional(); |
|
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1750 verify_region_sets_optional(); |
|
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1751 return attempt_allocation_at_safepoint(word_size, |
|
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1752 false /* expect_null_mutator_alloc_region */); |
|
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1753 } |
|
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|
1754 return NULL; |
| 342 | 1755 } |
| 1756 | |
| 3766 | 1757 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
| 1758 HeapWord* new_end) { | |
| 1759 assert(old_end != new_end, "don't call this otherwise"); | |
| 1760 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
| 1761 | |
| 1762 // Update the committed mem region. | |
| 1763 _g1_committed.set_end(new_end); | |
| 1764 // Tell the card table about the update. | |
| 1765 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
| 1766 // Tell the BOT about the update. | |
| 1767 _bot_shared->resize(_g1_committed.word_size()); | |
|
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1768 // Tell the hot card cache about the update |
|
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|
1769 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
| 3766 | 1770 } |
| 1771 | |
|
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1772 bool G1CollectedHeap::expand(size_t expand_bytes) { |
|
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|
1773 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1774 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1775 HeapRegion::GrainBytes); | |
|
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1776 ergo_verbose2(ErgoHeapSizing, |
|
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|
1777 "expand the heap", |
|
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|
1778 ergo_format_byte("requested expansion amount") |
|
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|
1779 ergo_format_byte("attempted expansion amount"), |
|
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|
1780 expand_bytes, aligned_expand_bytes); |
|
2188
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1781 |
|
12345
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1782 if (_g1_storage.uncommitted_size() == 0) { |
|
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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 already fully expanded")); |
|
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|
1786 return false; |
|
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|
1787 } |
|
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|
1788 |
| 3766 | 1789 // First commit the memory. |
| 1790 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
|
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|
1791 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
|
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|
1792 if (successful) { |
| 3766 | 1793 // Then propagate this update to the necessary data structures. |
| 1794 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
| 1795 update_committed_space(old_end, new_end); | |
| 1796 | |
| 1797 FreeRegionList expansion_list("Local Expansion List"); | |
| 1798 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
| 1799 assert(mr.start() == old_end, "post-condition"); | |
| 1800 // mr might be a smaller region than what was requested if | |
| 1801 // expand_by() was unable to allocate the HeapRegion instances | |
| 1802 assert(mr.end() <= new_end, "post-condition"); | |
| 1803 | |
| 1804 size_t actual_expand_bytes = mr.byte_size(); | |
| 1805 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
| 1806 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
| 1807 "post-condition"); | |
| 1808 if (actual_expand_bytes < aligned_expand_bytes) { | |
| 1809 // We could not expand _hrs to the desired size. In this case we | |
| 1810 // need to shrink the committed space accordingly. | |
| 1811 assert(mr.end() < new_end, "invariant"); | |
| 1812 | |
| 1813 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
| 1814 // First uncommit the memory. | |
| 1815 _g1_storage.shrink_by(diff_bytes); | |
| 1816 // Then propagate this update to the necessary data structures. | |
| 1817 update_committed_space(new_end, mr.end()); | |
|
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|
1818 } |
| 3766 | 1819 _free_list.add_as_tail(&expansion_list); |
|
3778
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|
1820 |
|
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|
1821 if (_hr_printer.is_active()) { |
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1822 HeapWord* curr = mr.start(); |
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1823 while (curr < mr.end()) { |
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1824 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1825 _hr_printer.commit(curr, curr_end); |
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1826 curr = curr_end; |
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1827 } |
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1828 assert(curr == mr.end(), "post-condition"); |
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1829 } |
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1830 g1_policy()->record_new_heap_size(n_regions()); |
|
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1831 } else { |
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1832 ergo_verbose0(ErgoHeapSizing, |
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1833 "did not expand the heap", |
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1834 ergo_format_reason("heap expansion operation failed")); |
|
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1835 // The expansion of the virtual storage space was unsuccessful. |
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1836 // Let's see if it was because we ran out of swap. |
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1837 if (G1ExitOnExpansionFailure && |
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1838 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1839 // We had head room... |
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1840 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
| 342 | 1841 } |
| 1842 } | |
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1843 return successful; |
| 342 | 1844 } |
| 1845 | |
| 3766 | 1846 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1847 size_t aligned_shrink_bytes = |
| 1848 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1849 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1850 HeapRegion::GrainBytes); | |
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1851 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1852 |
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1853 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
| 3766 | 1854 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
|
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1855 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1856 |
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1857 ergo_verbose3(ErgoHeapSizing, |
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1858 "shrink the heap", |
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1859 ergo_format_byte("requested shrinking amount") |
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1860 ergo_format_byte("aligned shrinking amount") |
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1861 ergo_format_byte("attempted shrinking amount"), |
|
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1862 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1863 if (num_regions_removed > 0) { |
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1864 _g1_storage.shrink_by(shrunk_bytes); |
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1865 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1866 |
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1867 if (_hr_printer.is_active()) { |
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1868 HeapWord* curr = old_end; |
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1869 while (curr > new_end) { |
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1870 HeapWord* curr_end = curr; |
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1871 curr -= HeapRegion::GrainWords; |
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1872 _hr_printer.uncommit(curr, curr_end); |
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1873 } |
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1874 } |
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1875 |
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1876 _expansion_regions += num_regions_removed; |
| 3766 | 1877 update_committed_space(old_end, new_end); |
| 1878 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1879 g1_policy()->record_new_heap_size(n_regions()); |
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1880 } else { |
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1881 ergo_verbose0(ErgoHeapSizing, |
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1882 "did not shrink the heap", |
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1883 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1884 } |
| 1885 } | |
| 1886 | |
| 1887 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1888 verify_region_sets_optional(); |
| 1889 | |
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1890 // We should only reach here at the end of a Full GC which means we |
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1891 // should not not be holding to any GC alloc regions. The method |
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1892 // below will make sure of that and do any remaining clean up. |
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1893 abandon_gc_alloc_regions(); |
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1894 |
| 2152 | 1895 // Instead of tearing down / rebuilding the free lists here, we |
| 1896 // could instead use the remove_all_pending() method on free_list to | |
| 1897 // remove only the ones that we need to remove. | |
| 4072 | 1898 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1899 shrink_helper(shrink_bytes); |
| 4072 | 1900 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1901 |
| 3766 | 1902 _hrs.verify_optional(); |
| 2152 | 1903 verify_region_sets_optional(); |
| 342 | 1904 } |
| 1905 | |
| 1906 // Public methods. | |
| 1907 | |
| 1908 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1909 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1910 #endif // _MSC_VER | |
| 1911 | |
| 1912 | |
| 1913 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1914 SharedHeap(policy_), | |
| 1915 _g1_policy(policy_), | |
| 1111 | 1916 _dirty_card_queue_set(false), |
| 1705 | 1917 _into_cset_dirty_card_queue_set(false), |
|
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1918 _is_alive_closure_cm(this), |
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1919 _is_alive_closure_stw(this), |
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1920 _ref_processor_cm(NULL), |
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1921 _ref_processor_stw(NULL), |
| 342 | 1922 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1923 _bot_shared(NULL), | |
| 10405 | 1924 _evac_failure_scan_stack(NULL), |
| 342 | 1925 _mark_in_progress(false), |
| 2152 | 1926 _cg1r(NULL), _summary_bytes_used(0), |
|
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1927 _g1mm(NULL), |
| 342 | 1928 _refine_cte_cl(NULL), |
| 1929 _full_collection(false), | |
|
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1930 _free_list("Master Free List", new MasterFreeRegionListMtSafeChecker()), |
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1931 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1932 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1933 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
| 2152 | 1934 _free_regions_coming(false), |
| 342 | 1935 _young_list(new YoungList(this)), |
| 1936 _gc_time_stamp(0), | |
|
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1937 _retained_old_gc_alloc_region(NULL), |
| 6595 | 1938 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1939 _old_plab_stats(OldPLABSize, PLABWeight), | |
|
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1940 _expand_heap_after_alloc_failure(true), |
| 526 | 1941 _surviving_young_words(NULL), |
|
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1942 _old_marking_cycles_started(0), |
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1943 _old_marking_cycles_completed(0), |
| 10405 | 1944 _concurrent_cycle_started(false), |
| 526 | 1945 _in_cset_fast_test(NULL), |
|
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1946 _in_cset_fast_test_base(NULL), |
|
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1947 _dirty_cards_region_list(NULL), |
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1948 _worker_cset_start_region(NULL), |
| 10405 | 1949 _worker_cset_start_region_time_stamp(NULL), |
| 1950 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
| 1951 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
| 1952 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
| 1953 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
| 1954 | |
| 1955 _g1h = this; | |
| 342 | 1956 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
| 1957 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1958 } | |
|
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1959 |
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1960 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1961 |
| 342 | 1962 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1963 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1964 | |
| 1965 int n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); | |
| 1966 assert(n_rem_sets > 0, "Invariant."); | |
| 1967 | |
| 6197 | 1968 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1969 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
| 10405 | 1970 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
|
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1971 |
| 342 | 1972 for (int i = 0; i < n_queues; i++) { |
| 1973 RefToScanQueue* q = new RefToScanQueue(); | |
| 1974 q->initialize(); | |
| 1975 _task_queues->register_queue(i, q); | |
| 10405 | 1976 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
| 1977 } | |
|
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1978 clear_cset_start_regions(); |
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1979 |
|
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1980 // Initialize the G1EvacuationFailureALot counters and flags. |
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1981 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1982 |
| 342 | 1983 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1984 } | |
| 1985 | |
| 1986 jint G1CollectedHeap::initialize() { | |
| 1166 | 1987 CollectedHeap::pre_initialize(); |
| 342 | 1988 os::enable_vtime(); |
| 1989 | |
|
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1990 G1Log::init(); |
|
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1991 |
| 342 | 1992 // Necessary to satisfy locking discipline assertions. |
| 1993 | |
| 1994 MutexLocker x(Heap_lock); | |
| 1995 | |
|
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1996 // We have to initialize the printer before committing the heap, as |
|
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1997 // it will be used then. |
|
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1998 _hr_printer.set_active(G1PrintHeapRegions); |
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1999 |
| 342 | 2000 // While there are no constraints in the GC code that HeapWordSize |
| 2001 // be any particular value, there are multiple other areas in the | |
| 2002 // system which believe this to be true (e.g. oop->object_size in some | |
| 2003 // cases incorrectly returns the size in wordSize units rather than | |
| 2004 // HeapWordSize). | |
| 2005 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 2006 | |
| 2007 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 2008 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
|
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2009 size_t heap_alignment = collector_policy()->heap_alignment(); |
| 342 | 2010 |
| 2011 // Ensure that the sizes are properly aligned. | |
| 2012 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 2013 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
|
12110
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|
2014 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
| 342 | 2015 |
|
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|
2016 _cg1r = new ConcurrentG1Refine(this); |
| 342 | 2017 |
| 2018 // Reserve the maximum. | |
|
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
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diff
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|
2019 |
|
3824
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
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diff
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|
2020 // When compressed oops are enabled, the preferred heap base |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
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|
2021 // is calculated by subtracting the requested size from the |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2022 // 32Gb boundary and using the result as the base address for |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2023 // heap reservation. If the requested size is not aligned to |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2024 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
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3823
diff
changeset
|
2025 // into the ReservedHeapSpace constructor) then the actual |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2026 // base of the reserved heap may end up differing from the |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2027 // address that was requested (i.e. the preferred heap base). |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2028 // If this happens then we could end up using a non-optimal |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
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changeset
|
2029 // compressed oops mode. |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
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3823
diff
changeset
|
2030 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2031 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
12082
diff
changeset
|
2032 heap_alignment); |
| 342 | 2033 |
| 2034 // It is important to do this in a way such that concurrent readers can't | |
| 10405 | 2035 // temporarily think something is in the heap. (I've actually seen this |
| 342 | 2036 // happen in asserts: DLD.) |
| 2037 _reserved.set_word_size(0); | |
| 2038 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 2039 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 2040 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
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changeset
|
2041 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
| 342 | 2042 |
| 2043 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 2044 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 2045 set_barrier_set(rem_set()->bs()); | |
| 12343 | 2046 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
| 2047 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
| 342 | 2048 return JNI_ENOMEM; |
| 2049 } | |
| 2050 | |
| 2051 // Also create a G1 rem set. | |
| 12343 | 2052 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
| 342 | 2053 |
| 2054 // Carve out the G1 part of the heap. | |
| 2055 | |
| 2056 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
| 2057 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
| 2058 g1_rs.size()/HeapWordSize); | |
| 2059 | |
| 2060 _g1_storage.initialize(g1_rs, 0); | |
| 2061 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
| 3766 | 2062 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
|
12305
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
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12233
diff
changeset
|
2063 (HeapWord*) _g1_reserved.end()); |
|
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
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12233
diff
changeset
|
2064 assert(_hrs.max_length() == _expansion_regions, |
|
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
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12233
diff
changeset
|
2065 err_msg("max length: %u expansion regions: %u", |
|
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
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12233
diff
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|
2066 _hrs.max_length(), _expansion_regions)); |
| 342 | 2067 |
|
10246
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10242
diff
changeset
|
2068 // Do later initialization work for concurrent refinement. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2069 _cg1r->init(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2070 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2071 // 6843694 - ensure that the maximum region index can fit |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2072 // in the remembered set structures. |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2073 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2074 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2075 |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2076 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2077 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
2078 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2079 "too many cards per region"); |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2080 |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
2081 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
| 2152 | 2082 |
| 342 | 2083 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
| 2084 heap_word_size(init_byte_size)); | |
| 2085 | |
| 2086 _g1h = this; | |
| 2087 | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2088 _in_cset_fast_test_length = max_regions(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2089 _in_cset_fast_test_base = |
| 6197 | 2090 NEW_C_HEAP_ARRAY(bool, (size_t) _in_cset_fast_test_length, mtGC); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2091 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2092 // We're biasing _in_cset_fast_test to avoid subtracting the |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2093 // beginning of the heap every time we want to index; basically |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2094 // it's the same with what we do with the card table. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2095 _in_cset_fast_test = _in_cset_fast_test_base - |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2096 ((uintx) _g1_reserved.start() >> HeapRegion::LogOfHRGrainBytes); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2097 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2098 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2099 // regions to the incremental collection set for the first |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2100 // evacuation pause. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2101 clear_cset_fast_test(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2102 |
| 342 | 2103 // Create the ConcurrentMark data structure and thread. |
| 2104 // (Must do this late, so that "max_regions" is defined.) | |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2105 _cm = new ConcurrentMark(this, heap_rs); |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2106 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
|
2107 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
|
2108 return JNI_ENOMEM; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2109 } |
| 342 | 2110 _cmThread = _cm->cmThread(); |
| 2111 | |
| 2112 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2113 HeapRegionRemSet::init_heap(max_regions()); | |
| 2114 | |
| 677 | 2115 // Now expand into the initial heap size. |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2116 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
|
2117 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
|
2118 return JNI_ENOMEM; |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2119 } |
| 342 | 2120 |
| 2121 // Perform any initialization actions delegated to the policy. | |
| 2122 g1_policy()->init(); | |
| 2123 | |
| 2124 _refine_cte_cl = | |
| 2125 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
| 2126 g1_rem_set(), | |
| 2127 concurrent_g1_refine()); | |
| 2128 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 2129 | |
| 2130 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2131 SATB_Q_FL_lock, | |
| 1111 | 2132 G1SATBProcessCompletedThreshold, |
| 342 | 2133 Shared_SATB_Q_lock); |
| 794 | 2134 |
| 2135 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
| 2136 DirtyCardQ_FL_lock, | |
| 1111 | 2137 concurrent_g1_refine()->yellow_zone(), |
| 2138 concurrent_g1_refine()->red_zone(), | |
| 794 | 2139 Shared_DirtyCardQ_lock); |
| 2140 | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2141 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2142 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2143 DirtyCardQ_FL_lock, |
| 1111 | 2144 -1, // never trigger processing |
| 2145 -1, // no limit on length | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2146 Shared_DirtyCardQ_lock, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2147 &JavaThread::dirty_card_queue_set()); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2148 } |
| 1705 | 2149 |
| 2150 // Initialize the card queue set used to hold cards containing | |
| 2151 // references into the collection set. | |
| 2152 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
| 2153 DirtyCardQ_FL_lock, | |
| 2154 -1, // never trigger processing | |
| 2155 -1, // no limit on length | |
| 2156 Shared_DirtyCardQ_lock, | |
| 2157 &JavaThread::dirty_card_queue_set()); | |
| 2158 | |
| 342 | 2159 // In case we're keeping closure specialization stats, initialize those |
| 2160 // counts and that mechanism. | |
| 2161 SpecializationStats::clear(); | |
| 2162 | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2163 // Here we allocate the dummy full region that is required by the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2164 // G1AllocRegion class. If we don't pass an address in the reserved |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2165 // space here, lots of asserts fire. |
| 3766 | 2166 |
| 2167 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
| 2168 _g1_reserved.start()); | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2169 // 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
|
2170 // 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
|
2171 // region will complain that it cannot support allocations without |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2172 // BOT updates. So we'll tag the dummy region as young to avoid that. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2173 dummy_region->set_young(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2174 // Make sure it's full. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2175 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2176 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2177 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2178 init_mutator_alloc_region(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2179 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2180 // 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
|
2181 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2182 _g1mm = new G1MonitoringSupport(this); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2183 |
| 342 | 2184 return JNI_OK; |
| 2185 } | |
| 2186 | |
|
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2187 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2188 return HeapRegion::max_region_size(); |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2189 } |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2190 |
| 342 | 2191 void G1CollectedHeap::ref_processing_init() { |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2192 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
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2193 // |
|
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2194 // * There are two reference processor instances. One is |
|
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2195 // used to record and process discovered references |
|
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2196 // during concurrent marking; the other is used to |
|
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2197 // record and process references during STW pauses |
|
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2198 // (both full and incremental). |
|
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2199 // * Both ref processors need to 'span' the entire heap as |
|
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2200 // the regions in the collection set may be dotted around. |
|
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2201 // |
|
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2202 // * For the concurrent marking ref processor: |
|
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2203 // * Reference discovery is enabled at initial marking. |
|
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2204 // * Reference discovery is disabled and the discovered |
|
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2205 // references processed etc during remarking. |
|
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2206 // * Reference discovery is MT (see below). |
|
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2207 // * Reference discovery requires a barrier (see below). |
|
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2208 // * Reference processing may or may not be MT |
|
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2209 // (depending on the value of ParallelRefProcEnabled |
|
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2210 // and ParallelGCThreads). |
|
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2211 // * A full GC disables reference discovery by the CM |
|
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2212 // ref processor and abandons any entries on it's |
|
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2213 // discovered lists. |
|
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2214 // |
|
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2215 // * For the STW processor: |
|
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2216 // * Non MT discovery is enabled at the start of a full GC. |
|
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2217 // * Processing and enqueueing during a full GC is non-MT. |
|
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2218 // * During a full GC, references are processed after marking. |
|
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2219 // |
|
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2220 // * Discovery (may or may not be MT) is enabled at the start |
|
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2221 // of an incremental evacuation pause. |
|
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2222 // * References are processed near the end of a STW evacuation pause. |
|
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2223 // * For both types of GC: |
|
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2224 // * Discovery is atomic - i.e. not concurrent. |
|
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2225 // * Reference discovery will not need a barrier. |
|
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2226 |
| 342 | 2227 SharedHeap::ref_processing_init(); |
| 2228 MemRegion mr = reserved_region(); | |
|
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2229 |
|
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|
2230 // Concurrent Mark ref processor |
|
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|
2231 _ref_processor_cm = |
|
2369
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|
2232 new ReferenceProcessor(mr, // span |
|
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2233 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
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2234 // mt processing |
|
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|
2235 (int) ParallelGCThreads, |
|
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|
2236 // degree of mt processing |
|
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|
2237 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
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|
2238 // mt discovery |
|
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|
2239 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
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|
2240 // degree of mt discovery |
|
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|
2241 false, |
|
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|
2242 // Reference discovery is not atomic |
|
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|
2243 &_is_alive_closure_cm, |
|
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|
2244 // is alive closure |
|
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|
2245 // (for efficiency/performance) |
|
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|
2246 true); |
|
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|
2247 // Setting next fields of discovered |
|
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|
2248 // lists requires a barrier. |
|
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|
2249 |
|
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|
2250 // STW ref processor |
|
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|
2251 _ref_processor_stw = |
|
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|
2252 new ReferenceProcessor(mr, // span |
|
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|
2253 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
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|
2254 // mt processing |
|
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|
2255 MAX2((int)ParallelGCThreads, 1), |
|
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|
2256 // degree of mt processing |
|
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|
2257 (ParallelGCThreads > 1), |
|
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|
2258 // mt discovery |
|
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|
2259 MAX2((int)ParallelGCThreads, 1), |
|
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|
2260 // degree of mt discovery |
|
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|
2261 true, |
|
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|
2262 // Reference discovery is atomic |
|
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|
2263 &_is_alive_closure_stw, |
|
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|
2264 // is alive closure |
|
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|
2265 // (for efficiency/performance) |
|
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|
2266 false); |
|
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|
2267 // Setting next fields of discovered |
|
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|
2268 // lists requires a barrier. |
| 342 | 2269 } |
| 2270 | |
| 2271 size_t G1CollectedHeap::capacity() const { | |
| 2272 return _g1_committed.byte_size(); | |
| 2273 } | |
| 2274 | |
|
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2275 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
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2276 assert(!hr->continuesHumongous(), "pre-condition"); |
|
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|
2277 hr->reset_gc_time_stamp(); |
|
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|
2278 if (hr->startsHumongous()) { |
|
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|
2279 uint first_index = hr->hrs_index() + 1; |
|
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|
2280 uint last_index = hr->last_hc_index(); |
|
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2281 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2282 HeapRegion* chr = region_at(i); |
|
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|
2283 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2284 chr->reset_gc_time_stamp(); |
|
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|
2285 } |
|
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2286 } |
|
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2287 } |
|
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2288 |
|
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|
2289 #ifndef PRODUCT |
|
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|
2290 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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2291 private: |
|
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|
2292 unsigned _gc_time_stamp; |
|
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|
2293 bool _failures; |
|
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2294 |
|
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2295 public: |
|
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2296 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
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2297 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
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2298 |
|
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|
2299 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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2300 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
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2301 if (_gc_time_stamp != region_gc_time_stamp) { |
|
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|
2302 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
|
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2303 "expected %d", HR_FORMAT_PARAMS(hr), |
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|
2304 region_gc_time_stamp, _gc_time_stamp); |
|
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2305 _failures = true; |
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2306 } |
|
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|
2307 return false; |
|
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|
2308 } |
|
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|
2309 |
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|
2310 bool failures() { return _failures; } |
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|
2311 }; |
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2312 |
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2313 void G1CollectedHeap::check_gc_time_stamps() { |
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2314 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
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|
2315 heap_region_iterate(&cl); |
|
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2316 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
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2317 } |
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|
2318 #endif // PRODUCT |
|
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|
2319 |
| 1705 | 2320 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2321 DirtyCardQueue* into_cset_dcq, | |
| 2322 bool concurrent, | |
| 342 | 2323 int worker_i) { |
| 889 | 2324 // Clean cards in the hot card cache |
|
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|
2325 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
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|
2326 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2327 |
| 342 | 2328 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2329 int n_completed_buffers = 0; | |
| 1705 | 2330 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2331 n_completed_buffers++; |
| 2332 } | |
|
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
|
2333 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
| 342 | 2334 dcqs.clear_n_completed_buffers(); |
| 2335 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2336 } | |
| 2337 | |
| 2338 | |
| 2339 // Computes the sum of the storage used by the various regions. | |
| 2340 | |
| 2341 size_t G1CollectedHeap::used() const { | |
|
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2342 assert(Heap_lock->owner() != NULL, |
|
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2343 "Should be owned on this thread's behalf."); |
| 342 | 2344 size_t result = _summary_bytes_used; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2345 // Read only once in case it is set to NULL concurrently |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2346 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2347 if (hr != NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2348 result += hr->used(); |
| 342 | 2349 return result; |
| 2350 } | |
| 2351 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2352 size_t G1CollectedHeap::used_unlocked() const { |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2353 size_t result = _summary_bytes_used; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2354 return result; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2355 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2356 |
| 342 | 2357 class SumUsedClosure: public HeapRegionClosure { |
| 2358 size_t _used; | |
| 2359 public: | |
| 2360 SumUsedClosure() : _used(0) {} | |
| 2361 bool doHeapRegion(HeapRegion* r) { | |
| 2362 if (!r->continuesHumongous()) { | |
| 2363 _used += r->used(); | |
| 2364 } | |
| 2365 return false; | |
| 2366 } | |
| 2367 size_t result() { return _used; } | |
| 2368 }; | |
| 2369 | |
| 2370 size_t G1CollectedHeap::recalculate_used() const { | |
| 2371 SumUsedClosure blk; | |
| 3766 | 2372 heap_region_iterate(&blk); |
| 342 | 2373 return blk.result(); |
| 2374 } | |
| 2375 | |
| 2376 size_t G1CollectedHeap::unsafe_max_alloc() { | |
| 2152 | 2377 if (free_regions() > 0) return HeapRegion::GrainBytes; |
| 342 | 2378 // otherwise, is there space in the current allocation region? |
| 2379 | |
| 2380 // We need to store the current allocation region in a local variable | |
| 2381 // here. The problem is that this method doesn't take any locks and | |
| 2382 // there may be other threads which overwrite the current allocation | |
| 2383 // region field. attempt_allocation(), for example, sets it to NULL | |
| 2384 // and this can happen *after* the NULL check here but before the call | |
| 2385 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
| 2386 // to be a problem in the optimized build, since the two loads of the | |
| 2387 // current allocation region field are optimized away. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2388 HeapRegion* hr = _mutator_alloc_region.get(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2389 if (hr == NULL) { |
| 342 | 2390 return 0; |
| 2391 } | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2392 return hr->free(); |
| 342 | 2393 } |
| 2394 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2395 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
|
2396 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2397 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2398 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
|
2399 case GCCause::_g1_humongous_allocation: return true; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2400 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2401 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2402 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2403 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2404 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2405 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2406 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2407 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2408 // 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
|
2409 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2410 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2411 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2412 // Let's use the existing mechanism for the allocation |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2413 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2414 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2415 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2416 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2417 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2418 // 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
|
2419 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2420 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2421 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2422 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2423 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2424 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2425 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2426 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
|
2427 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
|
2428 _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
|
2429 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
|
2430 _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
|
2431 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2432 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2433 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2434 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2435 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
|
2436 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2437 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2438 // 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
|
2439 // 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
|
2440 // 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
|
2441 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2442 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2443 // 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
|
2444 // 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
|
2445 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2446 // 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
|
2447 // 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
|
2448 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2449 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2450 // 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
|
2451 assert(concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2452 (_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
|
2453 (_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
|
2454 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
|
2455 "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
|
2456 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2457 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2458 // 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
|
2459 assert(!concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2460 (_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
|
2461 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
|
2462 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2463 "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
|
2464 _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
|
2465 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2466 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2467 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2468 // 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
|
2469 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2470 // is set) so that if a waiter requests another System.gc() it doesn't |
| 10405 | 2471 // 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
|
2472 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2473 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2474 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2475 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2476 // 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
|
2477 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2478 // 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
|
2479 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2480 FullGCCount_lock->notify_all(); |
|
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|
2481 } |
|
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2482 |
|
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|
2483 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
| 10405 | 2484 _concurrent_cycle_started = true; |
| 2485 _gc_timer_cm->register_gc_start(start_time); | |
| 2486 | |
| 2487 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
| 2488 trace_heap_before_gc(_gc_tracer_cm); | |
| 2489 } | |
| 2490 | |
| 2491 void G1CollectedHeap::register_concurrent_cycle_end() { | |
| 2492 if (_concurrent_cycle_started) { | |
| 2493 if (_cm->has_aborted()) { | |
| 2494 _gc_tracer_cm->report_concurrent_mode_failure(); | |
| 2495 } | |
|
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|
2496 |
|
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|
2497 _gc_timer_cm->register_gc_end(); |
| 10405 | 2498 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
| 2499 | |
| 2500 _concurrent_cycle_started = false; | |
| 2501 } | |
| 2502 } | |
| 2503 | |
| 2504 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
| 2505 if (_concurrent_cycle_started) { | |
| 2506 trace_heap_after_gc(_gc_tracer_cm); | |
| 2507 } | |
| 2508 } | |
| 2509 | |
| 2510 G1YCType G1CollectedHeap::yc_type() { | |
| 2511 bool is_young = g1_policy()->gcs_are_young(); | |
| 2512 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
| 2513 bool is_during_mark = mark_in_progress(); | |
| 2514 | |
| 2515 if (is_initial_mark) { | |
| 2516 return InitialMark; | |
| 2517 } else if (is_during_mark) { | |
| 2518 return DuringMark; | |
| 2519 } else if (is_young) { | |
| 2520 return Normal; | |
| 2521 } else { | |
| 2522 return Mixed; | |
| 2523 } | |
| 2524 } | |
| 2525 | |
|
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2526 void G1CollectedHeap::collect(GCCause::Cause cause) { |
|
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|
2527 assert_heap_not_locked(); |
|
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2528 |
|
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|
2529 unsigned int gc_count_before; |
|
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|
2530 unsigned int old_marking_count_before; |
|
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|
2531 bool retry_gc; |
|
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|
2532 |
|
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|
2533 do { |
|
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|
2534 retry_gc = false; |
|
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|
2535 |
|
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|
2536 { |
|
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|
2537 MutexLocker ml(Heap_lock); |
|
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|
2538 |
|
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|
2539 // Read the GC count while holding the Heap_lock |
|
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|
2540 gc_count_before = total_collections(); |
|
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|
2541 old_marking_count_before = _old_marking_cycles_started; |
|
4910
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|
2542 } |
|
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|
2543 |
|
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|
2544 if (should_do_concurrent_full_gc(cause)) { |
|
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|
2545 // Schedule an initial-mark evacuation pause that will start a |
|
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|
2546 // concurrent cycle. We're setting word_size to 0 which means that |
|
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|
2547 // we are not requesting a post-GC allocation. |
|
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|
2548 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2549 0, /* word_size */ |
|
4910
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|
2550 true, /* should_initiate_conc_mark */ |
|
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|
2551 g1_policy()->max_pause_time_ms(), |
|
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|
2552 cause); |
|
5963
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|
2553 |
|
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|
2554 VMThread::execute(&op); |
|
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|
2555 if (!op.pause_succeeded()) { |
|
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2556 if (old_marking_count_before == _old_marking_cycles_started) { |
|
5963
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|
2557 retry_gc = op.should_retry_gc(); |
|
4910
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|
2558 } else { |
|
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|
2559 // A Full GC happened while we were trying to schedule the |
|
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|
2560 // initial-mark GC. No point in starting a new cycle given |
|
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|
2561 // that the whole heap was collected anyway. |
|
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|
2562 } |
|
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|
2563 |
|
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|
2564 if (retry_gc) { |
|
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diff
changeset
|
2565 if (GC_locker::is_active_and_needs_gc()) { |
|
64bf7c8270cb
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|
2566 GC_locker::stall_until_clear(); |
|
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|
2567 } |
|
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|
2568 } |
|
4910
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|
2569 } |
|
1656
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|
2570 } else { |
|
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|
2571 if (cause == GCCause::_gc_locker |
|
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|
2572 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
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|
2573 |
|
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|
2574 // Schedule a standard evacuation pause. We're setting word_size |
|
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|
2575 // to 0 which means that we are not requesting a post-GC allocation. |
|
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|
2576 VM_G1IncCollectionPause op(gc_count_before, |
|
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|
2577 0, /* word_size */ |
|
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|
2578 false, /* should_initiate_conc_mark */ |
|
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|
2579 g1_policy()->max_pause_time_ms(), |
|
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|
2580 cause); |
|
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|
2581 VMThread::execute(&op); |
|
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|
2582 } else { |
|
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|
2583 // Schedule a Full GC. |
|
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|
2584 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
|
4910
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|
2585 VMThread::execute(&op); |
|
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|
2586 } |
|
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|
2587 } |
|
4910
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|
2588 } while (retry_gc); |
| 342 | 2589 } |
| 2590 | |
| 2591 bool G1CollectedHeap::is_in(const void* p) const { | |
| 4708 | 2592 if (_g1_committed.contains(p)) { |
| 2593 // Given that we know that p is in the committed space, | |
| 2594 // heap_region_containing_raw() should successfully | |
| 2595 // return the containing region. | |
| 2596 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2597 return hr->is_in(p); |
| 2598 } else { | |
|
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|
2599 return false; |
| 342 | 2600 } |
| 2601 } | |
| 2602 | |
| 2603 // Iteration functions. | |
| 2604 | |
| 2605 // Iterates an OopClosure over all ref-containing fields of objects | |
| 2606 // within a HeapRegion. | |
| 2607 | |
| 2608 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
| 2609 MemRegion _mr; | |
|
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|
2610 ExtendedOopClosure* _cl; |
| 342 | 2611 public: |
|
6725
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|
2612 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
| 342 | 2613 : _mr(mr), _cl(cl) {} |
| 2614 bool doHeapRegion(HeapRegion* r) { | |
|
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|
2615 if (!r->continuesHumongous()) { |
| 342 | 2616 r->oop_iterate(_cl); |
| 2617 } | |
| 2618 return false; | |
| 2619 } | |
| 2620 }; | |
| 2621 | |
|
6725
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|
2622 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
| 342 | 2623 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
| 3766 | 2624 heap_region_iterate(&blk); |
|
6725
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|
2625 } |
|
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|
2626 |
|
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|
2627 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
| 342 | 2628 IterateOopClosureRegionClosure blk(mr, cl); |
| 3766 | 2629 heap_region_iterate(&blk); |
| 342 | 2630 } |
| 2631 | |
| 2632 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2633 | |
| 2634 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2635 ObjectClosure* _cl; | |
| 2636 public: | |
| 2637 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2638 bool doHeapRegion(HeapRegion* r) { | |
| 2639 if (! r->continuesHumongous()) { | |
| 2640 r->object_iterate(_cl); | |
| 2641 } | |
| 2642 return false; | |
| 2643 } | |
| 2644 }; | |
| 2645 | |
|
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|
2646 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
| 342 | 2647 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2648 heap_region_iterate(&blk); |
| 342 | 2649 } |
| 2650 | |
| 2651 // Calls a SpaceClosure on a HeapRegion. | |
| 2652 | |
| 2653 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2654 SpaceClosure* _cl; | |
| 2655 public: | |
| 2656 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2657 bool doHeapRegion(HeapRegion* r) { | |
| 2658 _cl->do_space(r); | |
| 2659 return false; | |
| 2660 } | |
| 2661 }; | |
| 2662 | |
| 2663 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2664 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2665 heap_region_iterate(&blk); |
| 342 | 2666 } |
| 2667 | |
| 3766 | 2668 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
| 2669 _hrs.iterate(cl); | |
| 342 | 2670 } |
| 2671 | |
| 2672 void | |
| 2673 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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|
2674 uint worker_id, |
|
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|
2675 uint no_of_par_workers, |
| 342 | 2676 jint claim_value) { |
|
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|
2677 const uint regions = n_regions(); |
|
4728
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|
2678 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
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|
2679 no_of_par_workers : |
|
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|
2680 1); |
|
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|
2681 assert(UseDynamicNumberOfGCThreads || |
|
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|
2682 no_of_par_workers == workers()->total_workers(), |
|
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|
2683 "Non dynamic should use fixed number of workers"); |
| 355 | 2684 // try to spread out the starting points of the workers |
|
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|
2685 const HeapRegion* start_hr = |
|
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|
2686 start_region_for_worker(worker_id, no_of_par_workers); |
|
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|
2687 const uint start_index = start_hr->hrs_index(); |
| 355 | 2688 |
| 2689 // each worker will actually look at all regions | |
|
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|
2690 for (uint count = 0; count < regions; ++count) { |
|
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|
2691 const uint index = (start_index + count) % regions; |
| 355 | 2692 assert(0 <= index && index < regions, "sanity"); |
| 2693 HeapRegion* r = region_at(index); | |
| 2694 // we'll ignore "continues humongous" regions (we'll process them | |
| 2695 // when we come across their corresponding "start humongous" | |
| 2696 // region) and regions already claimed | |
| 2697 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
| 2698 continue; | |
| 2699 } | |
| 2700 // OK, try to claim it | |
| 342 | 2701 if (r->claimHeapRegion(claim_value)) { |
| 355 | 2702 // success! |
| 2703 assert(!r->continuesHumongous(), "sanity"); | |
| 2704 if (r->startsHumongous()) { | |
| 2705 // If the region is "starts humongous" we'll iterate over its | |
| 2706 // "continues humongous" first; in fact we'll do them | |
| 2707 // first. The order is important. In on case, calling the | |
| 2708 // closure on the "starts humongous" region might de-allocate | |
| 2709 // and clear all its "continues humongous" regions and, as a | |
| 2710 // result, we might end up processing them twice. So, we'll do | |
| 2711 // them first (notice: most closures will ignore them anyway) and | |
| 2712 // then we'll do the "starts humongous" region. | |
|
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2713 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
| 355 | 2714 HeapRegion* chr = region_at(ch_index); |
| 2715 | |
| 2716 // if the region has already been claimed or it's not | |
| 2717 // "continues humongous" we're done | |
| 2718 if (chr->claim_value() == claim_value || | |
| 2719 !chr->continuesHumongous()) { | |
| 2720 break; | |
| 2721 } | |
| 2722 | |
| 10405 | 2723 // No one should have claimed it directly. We can given |
| 355 | 2724 // that we claimed its "starts humongous" region. |
| 2725 assert(chr->claim_value() != claim_value, "sanity"); | |
| 2726 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2727 | |
| 2728 if (chr->claimHeapRegion(claim_value)) { | |
| 10405 | 2729 // we should always be able to claim it; no one else should |
| 355 | 2730 // be trying to claim this region |
| 2731 | |
| 2732 bool res2 = cl->doHeapRegion(chr); | |
| 2733 assert(!res2, "Should not abort"); | |
| 2734 | |
| 2735 // Right now, this holds (i.e., no closure that actually | |
| 2736 // does something with "continues humongous" regions | |
| 2737 // clears them). We might have to weaken it in the future, | |
| 2738 // but let's leave these two asserts here for extra safety. | |
| 2739 assert(chr->continuesHumongous(), "should still be the case"); | |
| 2740 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2741 } else { | |
| 2742 guarantee(false, "we should not reach here"); | |
| 2743 } | |
| 2744 } | |
| 2745 } | |
| 2746 | |
| 2747 assert(!r->continuesHumongous(), "sanity"); | |
| 2748 bool res = cl->doHeapRegion(r); | |
| 2749 assert(!res, "Should not abort"); | |
| 2750 } | |
| 2751 } | |
| 2752 } | |
| 2753 | |
| 390 | 2754 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2755 public: | |
| 2756 bool doHeapRegion(HeapRegion* r) { | |
| 2757 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2758 return false; | |
| 2759 } | |
| 2760 }; | |
| 2761 | |
|
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2762 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2763 ResetClaimValuesClosure blk; |
| 2764 heap_region_iterate(&blk); | |
| 2765 } | |
| 2766 | |
|
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2767 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
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2768 ResetClaimValuesClosure blk; |
|
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2769 collection_set_iterate(&blk); |
|
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2770 } |
|
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2771 |
| 355 | 2772 #ifdef ASSERT |
| 2773 // This checks whether all regions in the heap have the correct claim | |
| 2774 // value. I also piggy-backed on this a check to ensure that the | |
| 2775 // humongous_start_region() information on "continues humongous" | |
| 2776 // regions is correct. | |
| 2777 | |
| 2778 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2779 private: | |
| 2780 jint _claim_value; | |
|
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2781 uint _failures; |
| 355 | 2782 HeapRegion* _sh_region; |
|
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2783 |
| 355 | 2784 public: |
| 2785 CheckClaimValuesClosure(jint claim_value) : | |
| 2786 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2787 bool doHeapRegion(HeapRegion* r) { | |
| 2788 if (r->claim_value() != _claim_value) { | |
|
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2789 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2790 "claim value = %d, should be %d", |
|
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|
2791 HR_FORMAT_PARAMS(r), |
|
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|
2792 r->claim_value(), _claim_value); |
| 355 | 2793 ++_failures; |
| 2794 } | |
| 2795 if (!r->isHumongous()) { | |
| 2796 _sh_region = NULL; | |
| 2797 } else if (r->startsHumongous()) { | |
| 2798 _sh_region = r; | |
| 2799 } else if (r->continuesHumongous()) { | |
| 2800 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2801 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2802 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2803 HR_FORMAT_PARAMS(r), |
| 355 | 2804 r->humongous_start_region(), |
| 2805 _sh_region); | |
| 2806 ++_failures; | |
| 342 | 2807 } |
| 2808 } | |
| 355 | 2809 return false; |
| 2810 } | |
|
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|
2811 uint failures() { return _failures; } |
| 355 | 2812 }; |
| 2813 | |
| 2814 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2815 CheckClaimValuesClosure cl(claim_value); | |
| 2816 heap_region_iterate(&cl); | |
| 2817 return cl.failures() == 0; | |
| 2818 } | |
|
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|
2819 |
|
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|
2820 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
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2821 private: |
|
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|
2822 jint _claim_value; |
|
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|
2823 uint _failures; |
|
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|
2824 |
|
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|
2825 public: |
|
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|
2826 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
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|
2827 _claim_value(claim_value), _failures(0) { } |
|
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2828 |
|
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|
2829 uint failures() { return _failures; } |
|
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|
2830 |
|
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|
2831 bool doHeapRegion(HeapRegion* hr) { |
|
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|
2832 assert(hr->in_collection_set(), "how?"); |
|
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|
2833 assert(!hr->isHumongous(), "H-region in CSet"); |
|
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|
2834 if (hr->claim_value() != _claim_value) { |
|
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|
2835 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
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|
2836 "claim value = %d, should be %d", |
|
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|
2837 HR_FORMAT_PARAMS(hr), |
|
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|
2838 hr->claim_value(), _claim_value); |
|
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|
2839 _failures += 1; |
|
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|
2840 } |
|
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|
2841 return false; |
|
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|
2842 } |
|
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|
2843 }; |
|
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|
2844 |
|
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|
2845 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
dc467e8b2c5e
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|
2846 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2847 collection_set_iterate(&cl); |
|
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|
2848 return cl.failures() == 0; |
|
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|
2849 } |
| 355 | 2850 #endif // ASSERT |
| 342 | 2851 |
|
4709
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2852 // Clear the cached CSet starting regions and (more importantly) |
|
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|
2853 // the time stamps. Called when we reset the GC time stamp. |
|
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|
2854 void G1CollectedHeap::clear_cset_start_regions() { |
|
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2855 assert(_worker_cset_start_region != NULL, "sanity"); |
|
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changeset
|
2856 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2857 |
|
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|
2858 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
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|
2859 for (int i = 0; i < n_queues; i++) { |
|
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changeset
|
2860 _worker_cset_start_region[i] = NULL; |
|
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|
2861 _worker_cset_start_region_time_stamp[i] = 0; |
|
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|
2862 } |
|
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|
2863 } |
|
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|
2864 |
|
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changeset
|
2865 // Given the id of a worker, obtain or calculate a suitable |
|
fd2b426c30db
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|
2866 // starting region for iterating over the current collection set. |
|
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|
2867 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(int worker_i) { |
|
4709
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|
2868 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
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|
2869 |
|
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|
2870 HeapRegion* result = NULL; |
|
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|
2871 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
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|
2872 |
|
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changeset
|
2873 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
|
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|
2874 // Cached starting region for current worker was set |
|
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|
2875 // during the current pause - so it's valid. |
|
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|
2876 // Note: the cached starting heap region may be NULL |
|
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|
2877 // (when the collection set is empty). |
|
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changeset
|
2878 result = _worker_cset_start_region[worker_i]; |
|
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|
2879 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
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|
2880 return result; |
|
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|
2881 } |
|
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|
2882 |
|
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changeset
|
2883 // The cached entry was not valid so let's calculate |
|
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|
2884 // a suitable starting heap region for this worker. |
|
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|
2885 |
|
fd2b426c30db
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changeset
|
2886 // We want the parallel threads to start their collection |
|
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changeset
|
2887 // set iteration at different collection set regions to |
|
fd2b426c30db
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diff
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|
2888 // avoid contention. |
|
fd2b426c30db
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diff
changeset
|
2889 // If we have: |
|
fd2b426c30db
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diff
changeset
|
2890 // n collection set regions |
|
fd2b426c30db
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changeset
|
2891 // p threads |
|
fd2b426c30db
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changeset
|
2892 // Then thread t will start at region floor ((t * n) / p) |
|
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|
2893 |
|
fd2b426c30db
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|
2894 result = g1_policy()->collection_set(); |
|
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|
2895 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2896 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
|
2897 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
|
2898 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2899 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2900 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2901 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2902 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
|
2903 uint start_ind = 0; |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2904 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2905 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2906 _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
|
2907 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2908 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2909 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
|
2910 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
|
2911 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2912 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2913 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
|
2914 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2915 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2916 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2917 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2918 // 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
|
2919 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2920 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
|
2921 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
|
2922 "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
|
2923 _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
|
2924 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2925 _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
|
2926 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2927 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2928 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2929 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2930 uint no_of_par_workers) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2931 uint worker_num = |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2932 G1CollectedHeap::use_parallel_gc_threads() ? no_of_par_workers : 1U; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2933 assert(UseDynamicNumberOfGCThreads || |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2934 no_of_par_workers == workers()->total_workers(), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2935 "Non dynamic should use fixed number of workers"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2936 const uint start_index = n_regions() * worker_i / worker_num; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2937 return region_at(start_index); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2938 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2939 |
| 342 | 2940 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2941 HeapRegion* r = g1_policy()->collection_set(); | |
| 2942 while (r != NULL) { | |
| 2943 HeapRegion* next = r->next_in_collection_set(); | |
| 2944 if (cl->doHeapRegion(r)) { | |
| 2945 cl->incomplete(); | |
| 2946 return; | |
| 2947 } | |
| 2948 r = next; | |
| 2949 } | |
| 2950 } | |
| 2951 | |
| 2952 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2953 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2954 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2955 // 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
|
2956 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2957 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2958 |
| 342 | 2959 assert(r->in_collection_set(), |
| 2960 "Start region must be a member of the collection set."); | |
| 2961 HeapRegion* cur = r; | |
| 2962 while (cur != NULL) { | |
| 2963 HeapRegion* next = cur->next_in_collection_set(); | |
| 2964 if (cl->doHeapRegion(cur) && false) { | |
| 2965 cl->incomplete(); | |
| 2966 return; | |
| 2967 } | |
| 2968 cur = next; | |
| 2969 } | |
| 2970 cur = g1_policy()->collection_set(); | |
| 2971 while (cur != r) { | |
| 2972 HeapRegion* next = cur->next_in_collection_set(); | |
| 2973 if (cl->doHeapRegion(cur) && false) { | |
| 2974 cl->incomplete(); | |
| 2975 return; | |
| 2976 } | |
| 2977 cur = next; | |
| 2978 } | |
| 2979 } | |
| 2980 | |
| 2981 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
| 3766 | 2982 return n_regions() > 0 ? region_at(0) : NULL; |
| 342 | 2983 } |
| 2984 | |
| 2985 | |
| 2986 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
| 2987 Space* res = heap_region_containing(addr); | |
| 2988 return res; | |
| 2989 } | |
| 2990 | |
| 2991 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2992 Space* sp = space_containing(addr); | |
| 2993 if (sp != NULL) { | |
| 2994 return sp->block_start(addr); | |
| 2995 } | |
| 2996 return NULL; | |
| 2997 } | |
| 2998 | |
| 2999 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 3000 Space* sp = space_containing(addr); | |
| 3001 assert(sp != NULL, "block_size of address outside of heap"); | |
| 3002 return sp->block_size(addr); | |
| 3003 } | |
| 3004 | |
| 3005 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 3006 Space* sp = space_containing(addr); | |
| 3007 return sp->block_is_obj(addr); | |
| 3008 } | |
| 3009 | |
| 3010 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 3011 return true; | |
| 3012 } | |
| 3013 | |
| 3014 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 17727 | 3015 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
| 3016 } | |
| 3017 | |
| 3018 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
| 3019 return young_list()->eden_used_bytes(); | |
| 3020 } | |
| 3021 | |
| 3022 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
| 3023 // must be smaller than the humongous object limit. | |
| 3024 size_t G1CollectedHeap::max_tlab_size() const { | |
| 3025 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
| 342 | 3026 } |
| 3027 | |
| 3028 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 3029 // Return the remaining space in the cur alloc region, but not less than | |
| 3030 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3031 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3032 // Also, this value can be at most the humongous object threshold, |
| 10405 | 3033 // 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
|
3034 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3035 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3036 HeapRegion* hr = _mutator_alloc_region.get(); |
| 17727 | 3037 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
|
3038 if (hr == NULL) { |
| 17727 | 3039 return max_tlab; |
| 342 | 3040 } else { |
| 17727 | 3041 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
| 342 | 3042 } |
| 3043 } | |
| 3044 | |
| 3045 size_t G1CollectedHeap::max_capacity() const { | |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
3046 return _g1_reserved.byte_size(); |
| 342 | 3047 } |
| 3048 | |
| 3049 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 3050 // assert(false, "NYI"); | |
| 3051 return 0; | |
| 3052 } | |
| 3053 | |
| 3054 void G1CollectedHeap::prepare_for_verify() { | |
| 3055 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 3056 ensure_parsability(false); | |
| 3057 } | |
| 3058 g1_rem_set()->prepare_for_verify(); | |
| 3059 } | |
| 3060 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3061 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3062 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3063 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3064 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3065 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3066 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3067 return hr->obj_allocated_since_next_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3068 case VerifyOption_G1UseMarkWord: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3069 return false; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3070 default: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3071 ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3072 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3073 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3074 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3075 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3076 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3077 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3078 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3079 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3080 case VerifyOption_G1UseMarkWord: return NULL; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3081 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3082 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3083 return NULL; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3084 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3085 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3086 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3087 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3088 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3089 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3090 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3091 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3092 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3093 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3094 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3095 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3096 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
|
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3097 switch (vo) { |
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3098 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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3099 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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3100 case VerifyOption_G1UseMarkWord: return "NONE"; |
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3101 default: ShouldNotReachHere(); |
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3102 } |
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3103 return NULL; // keep some compilers happy |
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3104 } |
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3105 |
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3106 class VerifyRootsClosure: public OopClosure { |
| 12080 | 3107 private: |
| 3108 G1CollectedHeap* _g1h; | |
| 3109 VerifyOption _vo; | |
| 3110 bool _failures; | |
| 3111 public: | |
| 3112 // _vo == UsePrevMarking -> use "prev" marking information, | |
| 3113 // _vo == UseNextMarking -> use "next" marking information, | |
| 3114 // _vo == UseMarkWord -> use mark word from object header. | |
| 3115 VerifyRootsClosure(VerifyOption vo) : | |
| 3116 _g1h(G1CollectedHeap::heap()), | |
| 3117 _vo(vo), | |
| 3118 _failures(false) { } | |
| 3119 | |
| 3120 bool failures() { return _failures; } | |
| 3121 | |
| 3122 template <class T> void do_oop_nv(T* p) { | |
| 3123 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3124 if (!oopDesc::is_null(heap_oop)) { | |
| 3125 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3126 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
| 3127 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
| 3128 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
| 3129 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3130 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
| 3131 } | |
| 3132 obj->print_on(gclog_or_tty); | |
| 3133 _failures = true; | |
| 3134 } | |
| 3135 } | |
| 3136 } | |
| 3137 | |
| 3138 void do_oop(oop* p) { do_oop_nv(p); } | |
| 3139 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 3140 }; | |
| 3141 | |
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3142 class G1VerifyCodeRootOopClosure: public OopClosure { |
| 12080 | 3143 G1CollectedHeap* _g1h; |
| 3144 OopClosure* _root_cl; | |
| 3145 nmethod* _nm; | |
| 3146 VerifyOption _vo; | |
| 3147 bool _failures; | |
| 3148 | |
| 3149 template <class T> void do_oop_work(T* p) { | |
| 3150 // First verify that this root is live | |
| 3151 _root_cl->do_oop(p); | |
| 3152 | |
| 3153 if (!G1VerifyHeapRegionCodeRoots) { | |
| 3154 // We're not verifying the code roots attached to heap region. | |
| 3155 return; | |
| 3156 } | |
| 3157 | |
| 3158 // Don't check the code roots during marking verification in a full GC | |
| 3159 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3160 return; | |
| 3161 } | |
| 3162 | |
| 3163 // Now verify that the current nmethod (which contains p) is | |
| 3164 // in the code root list of the heap region containing the | |
| 3165 // object referenced by p. | |
| 3166 | |
| 3167 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3168 if (!oopDesc::is_null(heap_oop)) { | |
| 3169 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3170 | |
| 3171 // Now fetch the region containing the object | |
| 3172 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
| 3173 HeapRegionRemSet* hrrs = hr->rem_set(); | |
| 3174 // Verify that the strong code root list for this region | |
| 3175 // contains the nmethod | |
| 3176 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
| 3177 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
| 3178 "from nmethod "PTR_FORMAT" not in strong " | |
| 3179 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
| 3180 p, _nm, hr->bottom(), hr->end()); | |
| 3181 _failures = true; | |
| 3182 } | |
| 3183 } | |
| 3184 } | |
| 3185 | |
| 3186 public: | |
| 3187 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
| 3188 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
| 3189 | |
| 3190 void do_oop(oop* p) { do_oop_work(p); } | |
| 3191 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 3192 | |
| 3193 void set_nmethod(nmethod* nm) { _nm = nm; } | |
| 3194 bool failures() { return _failures; } | |
| 3195 }; | |
| 3196 | |
| 3197 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
| 3198 G1VerifyCodeRootOopClosure* _oop_cl; | |
| 3199 | |
| 3200 public: | |
| 3201 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
| 3202 _oop_cl(oop_cl) {} | |
| 3203 | |
| 3204 void do_code_blob(CodeBlob* cb) { | |
| 3205 nmethod* nm = cb->as_nmethod_or_null(); | |
| 3206 if (nm != NULL) { | |
| 3207 _oop_cl->set_nmethod(nm); | |
| 3208 nm->oops_do(_oop_cl); | |
| 3209 } | |
| 3210 } | |
| 3211 }; | |
| 3212 | |
| 3213 class YoungRefCounterClosure : public OopClosure { | |
| 3214 G1CollectedHeap* _g1h; | |
| 3215 int _count; | |
| 3216 public: | |
| 3217 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
| 3218 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
| 3219 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 3220 | |
| 3221 int count() { return _count; } | |
| 3222 void reset_count() { _count = 0; }; | |
| 3223 }; | |
| 3224 | |
| 3225 class VerifyKlassClosure: public KlassClosure { | |
| 3226 YoungRefCounterClosure _young_ref_counter_closure; | |
| 3227 OopClosure *_oop_closure; | |
| 3228 public: | |
| 3229 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
| 3230 void do_klass(Klass* k) { | |
| 3231 k->oops_do(_oop_closure); | |
| 3232 | |
| 3233 _young_ref_counter_closure.reset_count(); | |
| 3234 k->oops_do(&_young_ref_counter_closure); | |
| 3235 if (_young_ref_counter_closure.count() > 0) { | |
| 3236 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
| 3237 } | |
| 3238 } | |
| 3239 }; | |
| 3240 | |
| 342 | 3241 class VerifyLivenessOopClosure: public OopClosure { |
|
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3242 G1CollectedHeap* _g1h; |
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3243 VerifyOption _vo; |
| 342 | 3244 public: |
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3245 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
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3246 _g1h(g1h), _vo(vo) |
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3247 { } |
|
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3248 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3249 void do_oop( oop *p) { do_oop_work(p); } |
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3250 |
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3251 template <class T> void do_oop_work(T *p) { |
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3252 oop obj = oopDesc::load_decode_heap_oop(p); |
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3253 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
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|
3254 "Dead object referenced by a not dead object"); |
| 342 | 3255 } |
| 3256 }; | |
| 3257 | |
| 3258 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3259 private: |
| 342 | 3260 G1CollectedHeap* _g1h; |
| 3261 size_t _live_bytes; | |
| 3262 HeapRegion *_hr; | |
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3263 VerifyOption _vo; |
| 342 | 3264 public: |
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3265 // _vo == UsePrevMarking -> use "prev" marking information, |
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3266 // _vo == UseNextMarking -> use "next" marking information, |
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3267 // _vo == UseMarkWord -> use mark word from object header. |
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3268 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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3269 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3270 _g1h = G1CollectedHeap::heap(); |
| 3271 } | |
| 3272 void do_object(oop o) { | |
|
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3273 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3274 assert(o != NULL, "Huh?"); |
|
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3275 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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3276 // If the object is alive according to the mark word, |
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|
3277 // then verify that the marking information agrees. |
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|
3278 // Note we can't verify the contra-positive of the |
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|
3279 // above: if the object is dead (according to the mark |
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|
3280 // word), it may not be marked, or may have been marked |
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|
3281 // but has since became dead, or may have been allocated |
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|
3282 // since the last marking. |
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|
3283 if (_vo == VerifyOption_G1UseMarkWord) { |
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|
3284 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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|
3285 } |
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|
3286 |
|
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|
3287 o->oop_iterate_no_header(&isLive); |
|
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|
3288 if (!_hr->obj_allocated_since_prev_marking(o)) { |
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|
3289 size_t obj_size = o->size(); // Make sure we don't overflow |
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|
3290 _live_bytes += (obj_size * HeapWordSize); |
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|
3291 } |
| 342 | 3292 } |
| 3293 } | |
| 3294 size_t live_bytes() { return _live_bytes; } | |
| 3295 }; | |
| 3296 | |
| 3297 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3298 HeapRegion *_hr; | |
| 3299 G1CollectedHeap *_g1; | |
| 3300 public: | |
| 3301 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3302 _g1 = G1CollectedHeap::heap(); | |
| 3303 }; | |
| 3304 | |
| 3305 void do_object(oop o) { | |
| 3306 if (o != NULL) { | |
| 3307 HeapWord *start = (HeapWord *) o; | |
| 3308 size_t word_sz = o->size(); | |
| 3309 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3310 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3311 (void*) o, word_sz, | |
| 3312 _g1->isMarkedPrev(o), | |
| 3313 _g1->isMarkedNext(o), | |
| 3314 _hr->obj_allocated_since_prev_marking(o)); | |
| 3315 HeapWord *end = start + word_sz; | |
| 3316 HeapWord *cur; | |
| 3317 int *val; | |
| 3318 for (cur = start; cur < end; cur++) { | |
| 3319 val = (int *) cur; | |
| 3320 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3321 } | |
| 3322 } | |
| 3323 } | |
| 3324 }; | |
| 3325 | |
| 3326 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3327 private: |
|
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3328 bool _par; |
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3329 VerifyOption _vo; |
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3330 bool _failures; |
| 811 | 3331 public: |
|
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3332 // _vo == UsePrevMarking -> use "prev" marking information, |
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3333 // _vo == UseNextMarking -> use "next" marking information, |
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|
3334 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3335 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3336 : _par(par), | |
|
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3337 _vo(vo), |
|
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3338 _failures(false) {} |
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3339 |
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|
3340 bool failures() { |
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|
3341 return _failures; |
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|
3342 } |
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3343 |
| 342 | 3344 bool doHeapRegion(HeapRegion* r) { |
|
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|
3345 if (!r->continuesHumongous()) { |
|
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|
3346 bool failures = false; |
| 6008 | 3347 r->verify(_vo, &failures); |
|
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3348 if (failures) { |
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|
3349 _failures = true; |
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|
3350 } else { |
|
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|
3351 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
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|
3352 r->object_iterate(¬_dead_yet_cl); |
|
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|
3353 if (_vo != VerifyOption_G1UseNextMarking) { |
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|
3354 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
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|
3355 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
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|
3356 "max_live_bytes "SIZE_FORMAT" " |
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|
3357 "< calculated "SIZE_FORMAT, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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|
3358 r->bottom(), r->end(), |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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diff
changeset
|
3359 r->max_live_bytes(), |
|
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ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3360 not_dead_yet_cl.live_bytes()); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3361 _failures = true; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3362 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3363 } else { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3364 // When vo == UseNextMarking we cannot currently do a sanity |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3365 // check on the live bytes as the calculation has not been |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3366 // finalized yet. |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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|
3367 } |
|
ff2402f6a50b
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|
3368 } |
| 342 | 3369 } |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3370 return false; // stop the region iteration if we hit a failure |
| 342 | 3371 } |
| 3372 }; | |
| 3373 | |
| 12080 | 3374 // This is the task used for parallel verification of the heap regions |
| 390 | 3375 |
| 3376 class G1ParVerifyTask: public AbstractGangTask { | |
| 3377 private: | |
| 3378 G1CollectedHeap* _g1h; | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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diff
changeset
|
3379 VerifyOption _vo; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
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diff
changeset
|
3380 bool _failures; |
| 390 | 3381 |
| 3382 public: | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3383 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3384 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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diff
changeset
|
3385 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3386 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3387 AbstractGangTask("Parallel verify task"), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
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diff
changeset
|
3388 _g1h(g1h), |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3389 _vo(vo), |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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diff
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|
3390 _failures(false) { } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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|
3391 |
|
ff2402f6a50b
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diff
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|
3392 bool failures() { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
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diff
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|
3393 return _failures; |
|
ff2402f6a50b
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diff
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|
3394 } |
| 390 | 3395 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
3396 void work(uint worker_id) { |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3397 HandleMark hm; |
| 6008 | 3398 VerifyRegionClosure blk(true, _vo); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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diff
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|
3399 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
4095
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6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
3400 _g1h->workers()->active_workers(), |
| 390 | 3401 HeapRegion::ParVerifyClaimValue); |
|
1020
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|
3402 if (blk.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
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diff
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|
3403 _failures = true; |
|
ff2402f6a50b
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diff
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|
3404 } |
| 390 | 3405 } |
| 3406 }; | |
| 3407 | |
| 12080 | 3408 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
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parents:
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diff
changeset
|
3409 if (SafepointSynchronize::is_at_safepoint()) { |
| 12080 | 3410 assert(Thread::current()->is_VM_thread(), |
| 3411 "Expected to be executed serially by the VM thread at this point"); | |
| 3412 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
3413 if (!silent) { gclog_or_tty->print("Roots "); } |
|
3772
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diff
changeset
|
3414 VerifyRootsClosure rootsCl(vo); |
| 12080 | 3415 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
| 3416 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
3417 VerifyKlassClosure klassCl(this, &rootsCl); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
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diff
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|
3418 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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3289
diff
changeset
|
3419 // We apply the relevant closures to all the oops in the |
|
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
3289
diff
changeset
|
3420 // system dictionary, the string table and the code cache. |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
3421 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3422 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
3423 // Need cleared claim bits for the strong roots processing |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3424 ClassLoaderDataGraph::clear_claimed_marks(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3425 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
3289
diff
changeset
|
3426 process_strong_roots(true, // activate StrongRootsScope |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3427 false, // we set "is scavenging" to false, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3428 // so we don't reset the dirty cards. |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
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diff
changeset
|
3429 ScanningOption(so), // roots scanning options |
| 342 | 3430 &rootsCl, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
3431 &blobsCl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3432 &klassCl |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3433 ); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3434 |
| 12080 | 3435 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3436 |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3437 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3438 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3439 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3440 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3441 // the region sets when not in a full GC. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3442 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3443 verify_region_sets(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3444 } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3445 |
| 2152 | 3446 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3447 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3448 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3449 "sanity check"); | |
| 3450 | |
| 6008 | 3451 G1ParVerifyTask task(this, vo); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3452 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3453 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3454 "If not dynamic should be using all the workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3455 int n_workers = workers()->active_workers(); |
| 390 | 3456 set_par_threads(n_workers); |
| 3457 workers()->run_task(&task); | |
| 3458 set_par_threads(0); | |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3459 if (task.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3460 failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3461 } |
| 390 | 3462 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3463 // Checks that the expected amount of parallel work was done. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3464 // The implication is that n_workers is > 0. |
| 390 | 3465 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3466 "sanity check"); | |
| 3467 | |
| 3468 reset_heap_region_claim_values(); | |
| 3469 | |
| 3470 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3471 "sanity check"); | |
| 3472 } else { | |
| 6008 | 3473 VerifyRegionClosure blk(false, vo); |
| 3766 | 3474 heap_region_iterate(&blk); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3475 if (blk.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3476 failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3477 } |
| 390 | 3478 } |
| 2152 | 3479 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3480 rem_set()->verify(); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3481 |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3482 if (failures) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3483 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3484 // It helps to have the per-region information in the output to |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3485 // help us track down what went wrong. This is why we call |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3486 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3487 print_extended_on(gclog_or_tty); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3488 gclog_or_tty->print_cr(""); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3489 #ifndef PRODUCT |
| 1044 | 3490 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3491 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3492 vo, false /* all */); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3493 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3494 #endif |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3495 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3496 } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3497 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3498 } else { |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3499 if (!silent) |
|
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
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8853
diff
changeset
|
3500 gclog_or_tty->print("(SKIPPING roots, heapRegionSets, heapRegions, remset) "); |
| 342 | 3501 } |
| 3502 } | |
| 3503 | |
| 12080 | 3504 void G1CollectedHeap::verify(bool silent) { |
| 3505 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3506 } | |
| 3507 | |
| 3508 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
| 3509 double verify_time_ms = 0.0; | |
| 3510 | |
| 3511 if (guard && total_collections() >= VerifyGCStartAt) { | |
| 3512 double verify_start = os::elapsedTime(); | |
| 3513 HandleMark hm; // Discard invalid handles created during verification | |
| 3514 prepare_for_verify(); | |
| 3515 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
| 3516 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
| 3517 } | |
| 3518 | |
| 3519 return verify_time_ms; | |
| 3520 } | |
| 3521 | |
| 3522 void G1CollectedHeap::verify_before_gc() { | |
| 3523 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
| 3524 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
| 3525 } | |
| 3526 | |
| 3527 void G1CollectedHeap::verify_after_gc() { | |
| 3528 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
| 3529 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
| 3530 } | |
| 3531 | |
| 342 | 3532 class PrintRegionClosure: public HeapRegionClosure { |
| 3533 outputStream* _st; | |
| 3534 public: | |
| 3535 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3536 bool doHeapRegion(HeapRegion* r) { | |
| 3537 r->print_on(_st); | |
| 3538 return false; | |
| 3539 } | |
| 3540 }; | |
| 3541 | |
| 3542 void G1CollectedHeap::print_on(outputStream* st) const { | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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811
diff
changeset
|
3543 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3544 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
|
3545 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3546 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3547 _g1_storage.low_boundary(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3548 _g1_storage.high(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3549 _g1_storage.high_boundary()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3550 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3551 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
|
3552 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3553 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
|
3554 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3555 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
|
3556 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
|
3557 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3558 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3559 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3560 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3561 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3562 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3563 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3564 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3565 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3566 st->cr(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3567 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
|
3568 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3569 "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
|
3570 "PTAMS=previous top-at-mark-start, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3571 "NTAMS=next top-at-mark-start)"); |
| 342 | 3572 PrintRegionClosure blk(st); |
| 3766 | 3573 heap_region_iterate(&blk); |
| 342 | 3574 } |
| 3575 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3576 void G1CollectedHeap::print_on_error(outputStream* st) const { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3577 this->CollectedHeap::print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3578 |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3579 if (_cm != NULL) { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3580 st->cr(); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3581 _cm->print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3582 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3583 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3584 |
| 342 | 3585 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3586 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3587 workers()->print_worker_threads_on(st); |
| 3588 } | |
| 3589 _cmThread->print_on(st); | |
| 342 | 3590 st->cr(); |
| 1019 | 3591 _cm->print_worker_threads_on(st); |
| 3592 _cg1r->print_worker_threads_on(st); | |
| 342 | 3593 } |
| 3594 | |
| 3595 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3596 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3597 workers()->threads_do(tc); |
| 3598 } | |
| 3599 tc->do_thread(_cmThread); | |
| 794 | 3600 _cg1r->threads_do(tc); |
| 342 | 3601 } |
| 3602 | |
| 3603 void G1CollectedHeap::print_tracing_info() const { | |
| 3604 // We'll overload this to mean "trace GC pause statistics." | |
| 3605 if (TraceGen0Time || TraceGen1Time) { | |
| 3606 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3607 // to that. | |
| 3608 g1_policy()->print_tracing_info(); | |
| 3609 } | |
| 751 | 3610 if (G1SummarizeRSetStats) { |
| 342 | 3611 g1_rem_set()->print_summary_info(); |
| 3612 } | |
| 1282 | 3613 if (G1SummarizeConcMark) { |
| 342 | 3614 concurrent_mark()->print_summary_info(); |
| 3615 } | |
| 3616 g1_policy()->print_yg_surv_rate_info(); | |
| 3617 SpecializationStats::print(); | |
| 3618 } | |
| 3619 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3620 #ifndef PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3621 // Helpful for debugging RSet issues. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3622 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3623 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3624 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3625 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3626 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3627 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3628 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3629 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3630 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3631 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3632 _occupied_sum += occupied; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3633 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3634 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
|
3635 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3636 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3637 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3638 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3639 hrrs->print(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3640 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3641 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3642 return false; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3643 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3644 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3645 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3646 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3647 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3648 gclog_or_tty->print_cr(msg); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3649 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3650 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3651 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3652 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3653 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
|
3654 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3655 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3656 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3657 }; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3658 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3659 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3660 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3661 collection_set_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3662 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3663 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3664 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3665 PrintRSetsClosure cl("Printing All RSets");; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3666 heap_region_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3667 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3668 #endif // PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3669 |
| 342 | 3670 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3671 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3672 "not a garbage-first heap"); | |
| 3673 return _g1h; | |
| 3674 } | |
| 3675 | |
| 3676 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3677 // always_do_update_barrier = false; |
| 342 | 3678 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3679 // Fill TLAB's and such | |
| 17727 | 3680 accumulate_statistics_all_tlabs(); |
| 342 | 3681 ensure_parsability(true); |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3682 |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3683 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3684 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3685 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
|
3686 } |
| 342 | 3687 } |
| 3688 | |
| 3689 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3690 |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3691 if (G1SummarizeRSetStats && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3692 (G1SummarizeRSetStatsPeriod > 0) && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3693 // 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
|
3694 ((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
|
3695 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
|
3696 } |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3697 |
| 342 | 3698 // FIXME: what is this about? |
| 3699 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3700 // is set. | |
| 3701 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3702 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3703 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3704 |
| 17727 | 3705 resize_all_tlabs(); |
| 3706 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3707 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3708 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3709 Universe::update_heap_info_at_gc(); |
| 342 | 3710 } |
| 3711 | |
| 1973 | 3712 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3713 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
|
3714 bool* succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3715 GCCause::Cause gc_cause) { |
| 1973 | 3716 assert_heap_not_locked_and_not_at_safepoint(); |
| 342 | 3717 g1_policy()->record_stop_world_start(); |
| 1973 | 3718 VM_G1IncCollectionPause op(gc_count_before, |
| 3719 word_size, | |
| 3720 false, /* should_initiate_conc_mark */ | |
| 3721 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
|
3722 gc_cause); |
| 1973 | 3723 VMThread::execute(&op); |
| 3724 | |
| 3725 HeapWord* result = op.result(); | |
| 3726 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3727 assert(result == NULL || ret_succeeded, | |
| 3728 "the result should be NULL if the VM did not succeed"); | |
| 3729 *succeeded = ret_succeeded; | |
| 3730 | |
| 3731 assert_heap_not_locked(); | |
| 3732 return result; | |
| 342 | 3733 } |
| 3734 | |
| 3735 void | |
| 3736 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3737 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
|
3738 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3739 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3740 CGC_lock->notify(); |
| 342 | 3741 } |
| 3742 } | |
| 3743 | |
| 3744 size_t G1CollectedHeap::pending_card_num() { | |
| 3745 size_t extra_cards = 0; | |
| 3746 JavaThread *curr = Threads::first(); | |
| 3747 while (curr != NULL) { | |
| 3748 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3749 extra_cards += dcq.size(); | |
| 3750 curr = curr->next(); | |
| 3751 } | |
| 3752 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3753 size_t buffer_size = dcqs.buffer_size(); | |
| 3754 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3755 |
| 3756 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3757 // in bytes - not the number of 'entries'. We need to convert | |
| 3758 // into a number of cards. | |
| 3759 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3760 } |
| 3761 | |
| 3762 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3763 return g1_rem_set()->cardsScanned(); |
| 342 | 3764 } |
| 3765 | |
| 3766 void | |
| 3767 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3768 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3769 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3770 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3771 if (_surviving_young_words == NULL) { |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3772 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
| 342 | 3773 "Not enough space for young surv words summary."); |
| 3774 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3775 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
|
3776 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3777 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
|
3778 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3779 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3780 #endif // !ASSERT |
| 342 | 3781 } |
| 3782 | |
| 3783 void | |
| 3784 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3785 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
|
3786 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
|
3787 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3788 _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
|
3789 } |
| 342 | 3790 } |
| 3791 | |
| 3792 void | |
| 3793 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3794 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3795 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3796 _surviving_young_words = NULL; |
| 3797 } | |
| 3798 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3799 #ifdef ASSERT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3800 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3801 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3802 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3803 // 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
|
3804 // 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
|
3805 // 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
|
3806 // 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
|
3807 // 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
|
3808 // 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
|
3809 // 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
|
3810 // 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
|
3811 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3812 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
|
3813 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3814 // 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
|
3815 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3816 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3817 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3818 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3819 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3820 |
| 1709 | 3821 #if TASKQUEUE_STATS |
| 3822 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3823 st->print_raw_cr("GC Task Stats"); | |
| 3824 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3825 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3826 } | |
| 3827 | |
| 3828 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3829 print_taskqueue_stats_hdr(st); | |
| 3830 | |
| 3831 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3832 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3833 for (int i = 0; i < n; ++i) { |
| 3834 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3835 totals += task_queue(i)->stats; | |
| 3836 } | |
| 3837 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3838 | |
| 3839 DEBUG_ONLY(totals.verify()); | |
| 3840 } | |
| 3841 | |
| 3842 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3843 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3844 for (int i = 0; i < n; ++i) { |
| 3845 task_queue(i)->stats.reset(); | |
| 3846 } | |
| 3847 } | |
| 3848 #endif // TASKQUEUE_STATS | |
| 3849 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3850 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3851 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3852 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3853 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3854 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3855 gclog_or_tty->date_stamp(PrintGCDateStamps); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3856 gclog_or_tty->stamp(PrintGCTimeStamps); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3857 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3858 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
|
3859 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3860 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3861 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3862 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3863 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3864 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3865 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3866 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3867 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3868 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3869 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3870 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3871 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3872 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3873 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3874 gclog_or_tty->print_cr(", %3.7f secs]", pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3875 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3876 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3877 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3878 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3879 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3880 gclog_or_tty->print("--"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3881 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3882 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3883 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
|
3884 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3885 gclog_or_tty->flush(); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3886 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3887 |
| 1973 | 3888 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3889 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3890 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3891 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3892 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3893 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3894 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3895 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3896 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3897 _gc_timer_stw->register_gc_start(); |
| 10405 | 3898 |
| 3899 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
| 3900 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3901 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3902 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3903 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3904 print_heap_before_gc(); |
| 10405 | 3905 trace_heap_before_gc(_gc_tracer_stw); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3906 |
| 2152 | 3907 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3908 verify_dirty_young_regions(); |
| 2152 | 3909 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3910 // 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
|
3911 // 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
|
3912 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3913 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3914 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3915 // 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
|
3916 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3917 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3918 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3919 // 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
|
3920 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
|
3921 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3922 // 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
|
3923 // 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
|
3924 // 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
|
3925 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
|
3926 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3927 // 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
|
3928 { |
| 10405 | 3929 EvacuationInfo evacuation_info; |
| 3930 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3931 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3932 // 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
|
3933 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3934 increment_old_marking_cycles_started(); |
| 10405 | 3935 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
|
3936 } |
| 10405 | 3937 |
| 3938 _gc_tracer_stw->report_yc_type(yc_type()); | |
| 3939 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3940 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3941 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3942 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
|
3943 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
|
3944 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
|
3945 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3946 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3947 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3948 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3949 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3950 |
| 2361 | 3951 // If the secondary_free_list is not empty, append it to the |
| 3952 // free_list. No need to wait for the cleanup operation to finish; | |
| 3953 // the region allocation code will check the secondary_free_list | |
| 3954 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3955 // set, skip this step so that the region allocation code has to | |
| 3956 // get entries from the secondary_free_list. | |
| 2152 | 3957 if (!G1StressConcRegionFreeing) { |
| 2361 | 3958 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3959 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3960 |
| 12080 | 3961 assert(check_young_list_well_formed(), "young list should be well formed"); |
| 3962 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3963 "sanity check"); | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3964 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3965 // 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
|
3966 // 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
|
3967 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3968 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3969 { // 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
|
3970 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3971 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3972 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3973 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
|
3974 increment_gc_time_stamp(); |
| 342 | 3975 |
|
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
|
3976 verify_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3977 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3978 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3979 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3980 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3981 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3982 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3983 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3984 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3985 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3986 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3987 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3988 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3989 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3990 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3991 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3992 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3993 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3994 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3995 // 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
|
3996 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 release_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3998 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3999 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4000 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4001 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4002 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4003 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4004 // 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
|
4005 // 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
|
4006 // 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
|
4007 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4008 // 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
|
4009 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4010 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4011 // 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
|
4012 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4013 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4014 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4015 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4016 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4017 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
|
4018 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4019 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4020 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
|
4021 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4022 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4023 // 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
|
4024 // 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
|
4025 // 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
|
4026 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4027 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
|
4028 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4029 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4030 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
|
4031 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
|
4032 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4033 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
|
4034 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4035 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
4036 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
4038 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4039 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4040 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
4043 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4044 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4045 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4046 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4047 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:
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diff
changeset
|
4048 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
changeset
|
4049 |
| 10405 | 4050 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4051 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4052 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4053 // 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
|
4054 // 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
|
4055 // 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
|
4056 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
4057 _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
|
4058 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4059 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4060 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4061 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4062 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4063 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4065 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4066 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4067 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
4068 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
4069 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4070 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4071 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4072 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4073 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4074 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4075 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4076 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4077 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4078 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4080 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4081 #endif // ASSERT |
| 1707 | 4082 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 // Initialize the GC alloc regions. |
| 10405 | 4086 init_gc_alloc_regions(evacuation_info); |
|
3979
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 // Actually do the work... |
| 10405 | 4089 evacuate_collection_set(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4090 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4091 // 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
|
4092 // (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
|
4093 // 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
|
4094 // 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
|
4095 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4096 _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
|
4097 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4098 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4099 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4100 |
| 10405 | 4101 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4103 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4104 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4105 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4106 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4107 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4108 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4109 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4110 // regions to the incremental collection set for the next |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4111 // evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4112 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4113 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4114 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4115 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4117 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4118 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4119 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4120 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4121 "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
|
4122 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4123 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4126 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4127 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
| 10405 | 4129 _young_list->first_survivor_region(), |
| 4130 _young_list->last_survivor_region()); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4131 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4132 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4133 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4134 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4135 _summary_bytes_used = recalculate_used(); |
| 10405 | 4136 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
| 4137 for (uint i = 0; i < n_queues; i++) { | |
| 4138 if (_evacuation_failed_info_array[i].has_failed()) { | |
| 4139 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
| 4140 } | |
| 4141 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4142 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4143 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4144 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4145 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4146 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4147 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4148 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4149 // 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
|
4150 // 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
|
4151 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4152 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4154 // 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
|
4155 // 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
|
4156 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4160 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4161 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4164 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
|
4165 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4166 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 size_t bytes_before = capacity(); |
| 4785 | 4173 // No need for an ergo verbose message here, |
| 4174 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4177 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4178 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4179 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4180 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4181 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4182 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4183 |
| 10405 | 4184 // 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
|
4185 // 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
|
4186 _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
|
4187 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4188 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4189 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4190 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4191 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4192 // 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
|
4193 // 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
|
4194 // 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
|
4195 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
|
4196 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
| 10405 | 4197 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
|
4198 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4199 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4200 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4201 // 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
|
4202 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4203 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4204 // 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
|
4205 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4206 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4207 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4208 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4209 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4210 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4211 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4212 // 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
|
4213 // 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
|
4214 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4215 // 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
|
4216 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4217 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4218 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4219 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4220 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4221 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4222 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4223 |
|
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
|
4224 verify_after_gc(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4225 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4226 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4227 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4228 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4229 // 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
|
4230 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4231 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4232 // 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
|
4233 // 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
|
4234 // 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
|
4235 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4236 _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
|
4237 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4238 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4239 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4240 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4241 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4242 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4243 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4244 #endif |
| 342 | 4245 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4246 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4247 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4248 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4249 // 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
|
4250 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
|
4251 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4252 // 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
|
4253 // 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
|
4254 // 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
|
4255 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4256 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4257 _hrs.verify_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4258 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4259 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4260 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
|
4261 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4262 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4263 print_heap_after_gc(); |
| 10405 | 4264 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
|
4265 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4266 // 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
|
4267 // 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
|
4268 // 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
|
4269 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4270 g1mm()->update_sizes(); |
| 10405 | 4271 |
| 4272 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
| 4273 _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
|
4274 _gc_timer_stw->register_gc_end(); |
| 10405 | 4275 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
| 4276 } | |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4277 // 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
|
4278 // 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
|
4279 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4280 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4281 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4282 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4283 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4284 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4285 // 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
|
4286 // 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
|
4287 // not start until the safepoint itself is released in |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4288 // ConcurrentGCThread::safepoint_desynchronize(). |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4289 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4290 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4291 |
| 1973 | 4292 return true; |
| 342 | 4293 } |
| 4294 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4295 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4296 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4297 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4298 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4299 case GCAllocForSurvived: |
| 6595 | 4300 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4301 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4302 case GCAllocForTenured: |
| 6595 | 4303 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4304 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4305 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4306 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4307 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4308 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4309 } |
| 6595 | 4310 |
| 4311 // Prevent humongous PLAB sizes for two reasons: | |
| 4312 // * PLABs are allocated using a similar paths as oops, but should | |
| 4313 // never be in a humongous region | |
| 4314 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4315 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
|
4316 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4317 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4318 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4319 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4320 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4321 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4322 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4323 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4324 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4325 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4326 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4327 |
| 10405 | 4328 void G1CollectedHeap::init_gc_alloc_regions(EvacuationInfo& evacuation_info) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4329 assert_at_safepoint(true /* should_be_vm_thread */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4330 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4331 _survivor_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4332 _old_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4333 HeapRegion* retained_region = _retained_old_gc_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4334 _retained_old_gc_alloc_region = NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4335 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4336 // We will discard the current GC alloc region if: |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4337 // a) it's in the collection set (it can happen!), |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4338 // b) it's already full (no point in using it), |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4339 // c) it's empty (this means that it was emptied during |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4340 // a cleanup and it should be on the free list now), or |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4341 // d) it's humongous (this means that it was emptied |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4342 // during a cleanup and was added to the free list, but |
| 10405 | 4343 // has been subsequently used to allocate a humongous |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4344 // object that may be less than the region size). |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4345 if (retained_region != NULL && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4346 !retained_region->in_collection_set() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4347 !(retained_region->top() == retained_region->end()) && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4348 !retained_region->is_empty() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4349 !retained_region->isHumongous()) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4350 retained_region->set_saved_mark(); |
| 4072 | 4351 // The retained region was added to the old region set when it was |
| 4352 // retired. We have to remove it now, since we don't allow regions | |
| 4353 // we allocate to in the region sets. We'll re-add it later, when | |
| 4354 // it's retired again. | |
| 4355 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4356 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
|
4357 retained_region->note_start_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4358 _old_gc_alloc_region.set(retained_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4359 _hr_printer.reuse(retained_region); |
| 10405 | 4360 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
| 4361 } | |
| 4362 } | |
| 4363 | |
| 4364 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { | |
| 4365 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
| 4366 _old_gc_alloc_region.count()); | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4367 _survivor_gc_alloc_region.release(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4368 // If we have an old GC alloc region to release, we'll save it in |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4369 // _retained_old_gc_alloc_region. If we don't |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4370 // _retained_old_gc_alloc_region will become NULL. This is what we |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4371 // want either way so no reason to check explicitly for either |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4372 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4373 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 6595 | 4374 |
| 4375 if (ResizePLAB) { | |
| 6819 | 4376 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
| 4377 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
| 6595 | 4378 } |
| 342 | 4379 } |
| 4380 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4381 void G1CollectedHeap::abandon_gc_alloc_regions() { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4382 assert(_survivor_gc_alloc_region.get() == NULL, "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4383 assert(_old_gc_alloc_region.get() == NULL, "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4384 _retained_old_gc_alloc_region = NULL; |
| 342 | 4385 } |
| 4386 | |
| 4387 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4388 _drain_in_progress = false; | |
| 4389 set_evac_failure_closure(cl); | |
| 6197 | 4390 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4391 } |
| 4392 | |
| 4393 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4394 assert(_evac_failure_scan_stack != NULL && | |
| 4395 _evac_failure_scan_stack->length() == 0, | |
| 4396 "Postcondition"); | |
| 4397 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4398 delete _evac_failure_scan_stack; |
| 342 | 4399 _evac_failure_scan_stack = NULL; |
| 4400 } | |
| 4401 | |
| 4402 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
|
4403 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
|
4404 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4405 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4406 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4407 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4408 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4409 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4410 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4411 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4412 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4413 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4414 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4415 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
|
4416 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4417 // 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
|
4418 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4419 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4420 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4421 |
| 4422 // 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
|
4423 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
|
4424 _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
|
4425 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
|
4426 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
|
4427 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
|
4428 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
|
4429 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4430 _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
|
4431 _preserved_marks_of_objs.clear(true); |
| 342 | 4432 } |
| 4433 | |
| 4434 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4435 _evac_failure_scan_stack->push(obj); | |
| 4436 } | |
| 4437 | |
| 4438 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4439 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4440 | |
| 4441 while (_evac_failure_scan_stack->length() > 0) { | |
| 4442 oop obj = _evac_failure_scan_stack->pop(); | |
| 4443 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4444 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4445 } | |
| 4446 } | |
| 4447 | |
| 4448 oop | |
| 10405 | 4449 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
|
4450 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
|
4451 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
|
4452 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
|
4453 (HeapWord*) old)); |
| 342 | 4454 markOop m = old->mark(); |
| 4455 oop forward_ptr = old->forward_to_atomic(old); | |
| 4456 if (forward_ptr == NULL) { | |
| 4457 // Forward-to-self succeeded. | |
| 10405 | 4458 assert(_par_scan_state != NULL, "par scan state"); |
| 4459 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
| 4460 uint queue_num = _par_scan_state->queue_num(); | |
| 4461 | |
| 4462 _evacuation_failed = true; | |
| 4463 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
| 342 | 4464 if (_evac_failure_closure != cl) { |
| 4465 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4466 assert(!_drain_in_progress, | |
| 4467 "Should only be true while someone holds the lock."); | |
| 4468 // Set the global evac-failure closure to the current thread's. | |
| 4469 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4470 set_evac_failure_closure(cl); | |
| 4471 // Now do the common part. | |
| 4472 handle_evacuation_failure_common(old, m); | |
| 4473 // Reset to NULL. | |
| 4474 set_evac_failure_closure(NULL); | |
| 4475 } else { | |
| 4476 // The lock is already held, and this is recursive. | |
| 4477 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4478 handle_evacuation_failure_common(old, m); | |
| 4479 } | |
| 4480 return old; | |
| 4481 } 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
|
4482 // 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
|
4483 // 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
|
4484 // 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
|
4485 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
|
4486 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
|
4487 "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
|
4488 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4489 return forward_ptr; |
| 4490 } | |
| 4491 } | |
| 4492 | |
| 4493 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4494 preserve_mark_if_necessary(old, m); | |
| 4495 | |
| 4496 HeapRegion* r = heap_region_containing(old); | |
| 4497 if (!r->evacuation_failed()) { | |
| 4498 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4499 _hr_printer.evac_failure(r); |
| 342 | 4500 } |
| 4501 | |
| 4502 push_on_evac_failure_scan_stack(old); | |
| 4503 | |
| 4504 if (!_drain_in_progress) { | |
| 4505 // prevent recursion in copy_to_survivor_space() | |
| 4506 _drain_in_progress = true; | |
| 4507 drain_evac_failure_scan_stack(); | |
| 4508 _drain_in_progress = false; | |
| 4509 } | |
| 4510 } | |
| 4511 | |
| 4512 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
|
4513 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4514 // 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
|
4515 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4516 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
|
4517 _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
|
4518 _preserved_marks_of_objs.push(m); |
| 342 | 4519 } |
| 4520 } | |
| 4521 | |
| 4522 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4523 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4524 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4525 HeapWord* result = survivor_attempt_allocation(word_size); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4526 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4527 return result; |
| 342 | 4528 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4529 // 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
|
4530 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4531 return old_attempt_allocation(word_size); |
| 342 | 4532 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4533 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4534 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4535 HeapWord* result = old_attempt_allocation(word_size); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4536 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4537 return result; |
| 342 | 4538 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4539 // 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
|
4540 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4541 return survivor_attempt_allocation(word_size); |
| 342 | 4542 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4543 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4544 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4545 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4546 // 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
|
4547 return NULL; |
| 342 | 4548 } |
| 4549 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4550 G1ParGCAllocBuffer::G1ParGCAllocBuffer(size_t gclab_word_size) : |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4551 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4552 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4553 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num, ReferenceProcessor* rp) |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4554 : _g1h(g1h), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4555 _refs(g1h->task_queue(queue_num)), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4556 _dcq(&g1h->dirty_card_queue_set()), |
| 12343 | 4557 _ct_bs(g1h->g1_barrier_set()), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4558 _g1_rem(g1h->g1_rem_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4559 _hash_seed(17), _queue_num(queue_num), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4560 _term_attempts(0), |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4561 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4562 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4563 _age_table(false), _scanner(g1h, this, rp), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4564 _strong_roots_time(0), _term_time(0), |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4565 _alloc_buffer_waste(0), _undo_waste(0) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4566 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4567 // we "sacrifice" entry 0 to keep track of surviving bytes for |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4568 // non-young regions (where the age is -1) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4569 // We also add a few elements at the beginning and at the end in |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4570 // an attempt to eliminate cache contention |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4571 uint real_length = 1 + _g1h->g1_policy()->young_cset_region_length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4572 uint array_length = PADDING_ELEM_NUM + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4573 real_length + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4574 PADDING_ELEM_NUM; |
| 6197 | 4575 _surviving_young_words_base = NEW_C_HEAP_ARRAY(size_t, array_length, mtGC); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4576 if (_surviving_young_words_base == NULL) |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
4577 vm_exit_out_of_memory(array_length * sizeof(size_t), OOM_MALLOC_ERROR, |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4578 "Not enough space for young surv histo."); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4579 _surviving_young_words = _surviving_young_words_base + PADDING_ELEM_NUM; |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4580 memset(_surviving_young_words, 0, (size_t) real_length * sizeof(size_t)); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4581 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4582 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4583 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4584 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4585 _start = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4586 } |
| 342 | 4587 |
| 1709 | 4588 void |
| 4589 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
| 4590 { | |
| 4591 st->print_raw_cr("GC Termination Stats"); | |
| 4592 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
| 4593 " ------waste (KiB)------"); | |
| 4594 st->print_raw_cr("thr ms ms % ms % attempts" | |
| 4595 " total alloc undo"); | |
| 4596 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
| 4597 " ------- ------- -------"); | |
| 4598 } | |
| 4599 | |
| 4600 void | |
| 4601 G1ParScanThreadState::print_termination_stats(int i, | |
| 4602 outputStream* const st) const | |
| 4603 { | |
| 4604 const double elapsed_ms = elapsed_time() * 1000.0; | |
| 4605 const double s_roots_ms = strong_roots_time() * 1000.0; | |
| 4606 const double term_ms = term_time() * 1000.0; | |
| 4607 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
| 4608 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
| 4609 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
| 4610 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
| 4611 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
| 4612 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
| 4613 alloc_buffer_waste() * HeapWordSize / K, | |
| 4614 undo_waste() * HeapWordSize / K); | |
| 4615 } | |
| 4616 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4617 #ifdef ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4618 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4619 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4620 assert(UseCompressedOops, "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4621 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4622 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4623 assert(_g1h->is_in_g1_reserved(p), |
|
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4624 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4625 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4626 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4627 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4628 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4629 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4630 if (has_partial_array_mask(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4631 // Must be in the collection set--it's already been copied. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4632 oop p = clear_partial_array_mask(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4633 assert(_g1h->obj_in_cs(p), |
|
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4634 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4635 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4636 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4637 assert(_g1h->is_in_g1_reserved(p), |
|
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4638 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4639 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4640 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4641 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4642 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4643 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4644 if (ref.is_narrow()) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4645 return verify_ref((narrowOop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4646 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4647 return verify_ref((oop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4648 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4649 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4650 #endif // ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4651 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4652 void G1ParScanThreadState::trim_queue() { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4653 assert(_evac_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4654 assert(_evac_failure_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4655 assert(_partial_scan_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4656 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4657 StarTask ref; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4658 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4659 // Drain the overflow stack first, so other threads can steal. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4660 while (refs()->pop_overflow(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4661 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4662 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4663 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4664 while (refs()->pop_local(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4665 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4666 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4667 } while (!refs()->is_empty()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4668 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4669 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4670 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4671 G1ParScanThreadState* par_scan_state) : |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4672 _g1(g1), _par_scan_state(par_scan_state), |
|
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4673 _worker_id(par_scan_state->queue_num()) { } |
|
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4674 |
|
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4675 void G1ParCopyHelper::mark_object(oop obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4676 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4677 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4678 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4679 assert(!hr->in_collection_set(), "should not mark objects in the CSet"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4680 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4681 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4682 // 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
|
4683 _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
|
4684 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4685 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4686 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
|
4687 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4688 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
|
4689 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
|
4690 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
|
4691 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4692 HeapRegion* from_hr = _g1->heap_region_containing(from_obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4693 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4694 assert(from_hr->in_collection_set(), "from obj should be in the CSet"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4695 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4696 HeapRegion* to_hr = _g1->heap_region_containing(to_obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4697 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4698 assert(!to_hr->in_collection_set(), "should not mark objects in the CSet"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4699 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4700 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4701 // 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
|
4702 // 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
|
4703 // 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
|
4704 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4705 _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
|
4706 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4707 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4708 oop G1ParScanThreadState::copy_to_survivor_space(oop const old) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4709 size_t word_sz = old->size(); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4710 HeapRegion* from_region = _g1h->heap_region_containing_raw(old); |
| 342 | 4711 // +1 to make the -1 indexes valid... |
| 4712 int young_index = from_region->young_index_in_cset()+1; | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4713 assert( (from_region->is_young() && young_index > 0) || |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4714 (!from_region->is_young() && young_index == 0), "invariant" ); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4715 G1CollectorPolicy* g1p = _g1h->g1_policy(); |
| 342 | 4716 markOop m = old->mark(); |
| 545 | 4717 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
| 4718 : m->age(); | |
| 4719 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
| 342 | 4720 word_sz); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4721 HeapWord* obj_ptr = allocate(alloc_purpose, word_sz); |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4722 #ifndef PRODUCT |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4723 // Should this evacuation fail? |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4724 if (_g1h->evacuation_should_fail()) { |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4725 if (obj_ptr != NULL) { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4726 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4727 obj_ptr = NULL; |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4728 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4729 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4730 #endif // !PRODUCT |
| 342 | 4731 |
| 4732 if (obj_ptr == NULL) { | |
| 4733 // This will either forward-to-self, or detect that someone else has | |
| 4734 // installed a forwarding pointer. | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4735 return _g1h->handle_evacuation_failure_par(this, old); |
| 342 | 4736 } |
| 4737 | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4738 oop obj = oop(obj_ptr); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4739 |
| 526 | 4740 // We're going to allocate linearly, so might as well prefetch ahead. |
| 4741 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
| 4742 | |
| 342 | 4743 oop forward_ptr = old->forward_to_atomic(obj); |
| 4744 if (forward_ptr == NULL) { | |
| 4745 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
| 526 | 4746 if (g1p->track_object_age(alloc_purpose)) { |
| 4747 // We could simply do obj->incr_age(). However, this causes a | |
| 4748 // performance issue. obj->incr_age() will first check whether | |
| 4749 // the object has a displaced mark by checking its mark word; | |
| 4750 // getting the mark word from the new location of the object | |
| 4751 // stalls. So, given that we already have the mark word and we | |
| 4752 // are about to install it anyway, it's better to increase the | |
| 4753 // age on the mark word, when the object does not have a | |
| 4754 // displaced mark word. We're not expecting many objects to have | |
| 4755 // a displaced marked word, so that case is not optimized | |
| 4756 // further (it could be...) and we simply call obj->incr_age(). | |
| 4757 | |
| 4758 if (m->has_displaced_mark_helper()) { | |
| 4759 // in this case, we have to install the mark word first, | |
| 4760 // otherwise obj looks to be forwarded (the old mark word, | |
| 4761 // which contains the forward pointer, was copied) | |
| 4762 obj->set_mark(m); | |
| 4763 obj->incr_age(); | |
| 4764 } else { | |
| 4765 m = m->incr_age(); | |
| 545 | 4766 obj->set_mark(m); |
| 526 | 4767 } |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4768 age_table()->add(obj, word_sz); |
| 545 | 4769 } else { |
| 4770 obj->set_mark(m); | |
| 526 | 4771 } |
| 4772 | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4773 size_t* surv_young_words = surviving_young_words(); |
| 342 | 4774 surv_young_words[young_index] += word_sz; |
| 4775 | |
| 4776 if (obj->is_objArray() && arrayOop(obj)->length() >= ParGCArrayScanChunk) { | |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4777 // We keep track of the next start index in the length field of |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4778 // the to-space object. The actual length can be found in the |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4779 // length field of the from-space object. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4780 arrayOop(obj)->set_length(0); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4781 oop* old_p = set_partial_array_mask(old); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4782 push_on_queue(old_p); |
| 342 | 4783 } else { |
| 526 | 4784 // No point in using the slower heap_region_containing() method, |
| 4785 // given that we know obj is in the heap. | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4786 _scanner.set_region(_g1h->heap_region_containing_raw(obj)); |
| 5987 | 4787 obj->oop_iterate_backwards(&_scanner); |
| 342 | 4788 } |
| 4789 } else { | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4790 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
| 342 | 4791 obj = forward_ptr; |
| 4792 } | |
| 4793 return obj; | |
| 4794 } | |
| 4795 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4796 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4797 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
|
4798 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
|
4799 _scanned_klass->record_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4800 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4801 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4802 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4803 template <G1Barrier barrier, bool do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4804 template <class T> |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4805 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
|
4806 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
|
4807 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4808 if (oopDesc::is_null(heap_oop)) { |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4809 return; |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4810 } |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4811 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4812 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
|
4813 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4814 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4815 |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4816 if (_g1->in_cset_fast_test(obj)) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4817 oop forwardee; |
| 526 | 4818 if (obj->is_forwarded()) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4819 forwardee = obj->forwardee(); |
| 526 | 4820 } else { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4821 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
| 342 | 4822 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4823 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
|
4824 oopDesc::encode_store_heap_oop(p, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4825 if (do_mark_object && forwardee != obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4826 // 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
|
4827 // 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
|
4828 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4829 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4830 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4831 if (barrier == G1BarrierKlass) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4832 do_klass_barrier(p, forwardee); |
| 342 | 4833 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4834 } else { |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4835 // The object is not in collection set. If we're a root scanning |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4836 // closure during an initial mark pause (i.e. do_mark_object will |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4837 // be true) then attempt to mark the object. |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4838 if (do_mark_object) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4839 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4840 } |
| 526 | 4841 } |
| 4842 | |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4843 if (barrier == G1BarrierEvac) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4844 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4845 } |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4846 } |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4847 |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4848 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(oop* p); |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4849 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4850 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4851 template <class T> void G1ParScanPartialArrayClosure::do_oop_nv(T* p) { |
| 526 | 4852 assert(has_partial_array_mask(p), "invariant"); |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4853 oop from_obj = clear_partial_array_mask(p); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4854 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4855 assert(Universe::heap()->is_in_reserved(from_obj), "must be in heap."); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4856 assert(from_obj->is_objArray(), "must be obj array"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4857 objArrayOop from_obj_array = objArrayOop(from_obj); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4858 // The from-space object contains the real length. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4859 int length = from_obj_array->length(); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4860 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4861 assert(from_obj->is_forwarded(), "must be forwarded"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4862 oop to_obj = from_obj->forwardee(); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4863 assert(from_obj != to_obj, "should not be chunking self-forwarded objects"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4864 objArrayOop to_obj_array = objArrayOop(to_obj); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4865 // We keep track of the next start index in the length field of the |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4866 // to-space object. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4867 int next_index = to_obj_array->length(); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4868 assert(0 <= next_index && next_index < length, |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4869 err_msg("invariant, next index: %d, length: %d", next_index, length)); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4870 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4871 int start = next_index; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4872 int end = length; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4873 int remainder = end - start; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4874 // We'll try not to push a range that's smaller than ParGCArrayScanChunk. |
| 342 | 4875 if (remainder > 2 * ParGCArrayScanChunk) { |
| 4876 end = start + ParGCArrayScanChunk; | |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4877 to_obj_array->set_length(end); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4878 // Push the remainder before we process the range in case another |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4879 // worker has run out of things to do and can steal it. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4880 oop* from_obj_p = set_partial_array_mask(from_obj); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4881 _par_scan_state->push_on_queue(from_obj_p); |
| 342 | 4882 } else { |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4883 assert(length == end, "sanity"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4884 // We'll process the final range for this object. Restore the length |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4885 // so that the heap remains parsable in case of evacuation failure. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4886 to_obj_array->set_length(end); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4887 } |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4888 _scanner.set_region(_g1->heap_region_containing_raw(to_obj)); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4889 // Process indexes [start,end). It will also process the header |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4890 // along with the first chunk (i.e., the chunk with start == 0). |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4891 // Note that at this point the length field of to_obj_array is not |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4892 // correct given that we are using it to keep track of the next |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4893 // start index. oop_iterate_range() (thankfully!) ignores the length |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4894 // field and only relies on the start / end parameters. It does |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4895 // however return the size of the object which will be incorrect. So |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4896 // we have to ignore it even if we wanted to use it. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4897 to_obj_array->oop_iterate_range(&_scanner, start, end); |
| 342 | 4898 } |
| 4899 | |
| 4900 class G1ParEvacuateFollowersClosure : public VoidClosure { | |
| 4901 protected: | |
| 4902 G1CollectedHeap* _g1h; | |
| 4903 G1ParScanThreadState* _par_scan_state; | |
| 4904 RefToScanQueueSet* _queues; | |
| 4905 ParallelTaskTerminator* _terminator; | |
| 4906 | |
| 4907 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4908 RefToScanQueueSet* queues() { return _queues; } | |
| 4909 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4910 | |
| 4911 public: | |
| 4912 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4913 G1ParScanThreadState* par_scan_state, | |
| 4914 RefToScanQueueSet* queues, | |
| 4915 ParallelTaskTerminator* terminator) | |
| 4916 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4917 _queues(queues), _terminator(terminator) {} | |
| 4918 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4919 void do_void(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4920 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4921 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4922 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4923 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4924 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
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|
4925 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
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|
4926 G1ParScanThreadState* const pss = par_scan_state(); |
|
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|
4927 pss->start_term_time(); |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
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|
4928 const bool res = terminator()->offer_termination(); |
|
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|
4929 pss->end_term_time(); |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
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|
4930 return res; |
|
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|
4931 } |
|
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|
4932 |
|
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|
4933 void G1ParEvacuateFollowersClosure::do_void() { |
|
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|
4934 StarTask stolen_task; |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
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|
4935 G1ParScanThreadState* const pss = par_scan_state(); |
|
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|
4936 pss->trim_queue(); |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
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|
4937 |
|
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|
4938 do { |
|
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changeset
|
4939 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
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|
4940 assert(pss->verify_task(stolen_task), "sanity"); |
|
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changeset
|
4941 if (stolen_task.is_narrow()) { |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
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changeset
|
4942 pss->deal_with_reference((narrowOop*) stolen_task); |
|
1862
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6989448: G1: refactor and simplify G1ParScanThreadState
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|
4943 } else { |
|
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35e4e086d5f5
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changeset
|
4944 pss->deal_with_reference((oop*) stolen_task); |
|
1862
b14ec34b1e07
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|
4945 } |
|
1883
35e4e086d5f5
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|
4946 |
|
35e4e086d5f5
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changeset
|
4947 // We've just processed a reference and we might have made |
|
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|
4948 // available new entries on the queues. So we have to make sure |
|
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|
4949 // we drain the queues as necessary. |
| 342 | 4950 pss->trim_queue(); |
| 4951 } | |
|
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|
4952 } while (!offer_termination()); |
|
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|
4953 |
|
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|
4954 pss->retire_alloc_buffers(); |
|
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|
4955 } |
| 342 | 4956 |
|
6725
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|
4957 class G1KlassScanClosure : public KlassClosure { |
|
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|
4958 G1ParCopyHelper* _closure; |
|
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|
4959 bool _process_only_dirty; |
|
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|
4960 int _count; |
|
da91efe96a93
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|
4961 public: |
|
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|
4962 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
|
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|
4963 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4964 void do_klass(Klass* klass) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4965 // If the klass has not been dirtied we know that there's |
|
da91efe96a93
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|
4966 // no references into the young gen and we can skip it. |
|
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|
4967 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
da91efe96a93
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|
4968 // Clean the klass since we're going to scavenge all the metadata. |
|
da91efe96a93
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|
4969 klass->clear_modified_oops(); |
|
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|
4970 |
|
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|
4971 // Tell the closure that this klass is the Klass to scavenge |
|
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|
4972 // and is the one to dirty if oops are left pointing into the young gen. |
|
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|
4973 _closure->set_scanned_klass(klass); |
|
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|
4974 |
|
da91efe96a93
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changeset
|
4975 klass->oops_do(_closure); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4976 |
|
da91efe96a93
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changeset
|
4977 _closure->set_scanned_klass(NULL); |
|
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6964458: Reimplement class meta-data storage to use native memory
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|
4978 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
4979 _count++; |
|
da91efe96a93
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changeset
|
4980 } |
|
da91efe96a93
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|
4981 }; |
|
da91efe96a93
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changeset
|
4982 |
| 342 | 4983 class G1ParTask : public AbstractGangTask { |
| 4984 protected: | |
| 4985 G1CollectedHeap* _g1h; | |
| 4986 RefToScanQueueSet *_queues; | |
| 4987 ParallelTaskTerminator _terminator; | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4988 uint _n_workers; |
| 342 | 4989 |
| 4990 Mutex _stats_lock; | |
| 4991 Mutex* stats_lock() { return &_stats_lock; } | |
| 4992 | |
| 4993 size_t getNCards() { | |
| 4994 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 4995 / G1BlockOffsetSharedArray::N_bytes; | |
| 4996 } | |
| 4997 | |
| 4998 public: | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4999 G1ParTask(G1CollectedHeap* g1h, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
5000 RefToScanQueueSet *task_queues) |
| 342 | 5001 : AbstractGangTask("G1 collection"), |
| 5002 _g1h(g1h), | |
| 5003 _queues(task_queues), | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5004 _terminator(0, _queues), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
5005 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 5006 {} |
| 5007 | |
| 5008 RefToScanQueueSet* queues() { return _queues; } | |
| 5009 | |
| 5010 RefToScanQueue *work_queue(int i) { | |
| 5011 return queues()->queue(i); | |
| 5012 } | |
| 5013 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5014 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5015 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
5016 virtual void set_for_termination(int active_workers) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5017 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
5018 // in the young space (_par_seq_tasks) in the G1 heap |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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diff
changeset
|
5019 // for SequentialSubTasksDone. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
5020 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
5021 // both of which need setting by set_n_termination(). |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
5022 _g1h->SharedHeap::set_n_termination(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
5023 _g1h->set_n_termination(active_workers); |
|
bca17e38de00
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jmasa
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4090
diff
changeset
|
5024 terminator()->reset_for_reuse(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
5025 _n_workers = active_workers; |
|
bca17e38de00
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parents:
4090
diff
changeset
|
5026 } |
|
bca17e38de00
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jmasa
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4090
diff
changeset
|
5027 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5028 void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5029 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 5030 |
| 5031 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
|
5032 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 5033 |
|
5986
500023bd0818
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5963
diff
changeset
|
5034 { |
|
500023bd0818
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5963
diff
changeset
|
5035 ResourceMark rm; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5036 HandleMark hm; |
|
500023bd0818
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diff
changeset
|
5037 |
|
500023bd0818
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diff
changeset
|
5038 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
5039 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5040 G1ParScanThreadState pss(_g1h, worker_id, rp); |
|
5986
500023bd0818
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diff
changeset
|
5041 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, rp); |
|
500023bd0818
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5963
diff
changeset
|
5042 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
5043 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, rp); |
|
500023bd0818
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5963
diff
changeset
|
5044 |
|
500023bd0818
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5963
diff
changeset
|
5045 pss.set_evac_closure(&scan_evac_cl); |
|
500023bd0818
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5963
diff
changeset
|
5046 pss.set_evac_failure_closure(&evac_failure_cl); |
|
500023bd0818
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5963
diff
changeset
|
5047 pss.set_partial_scan_closure(&partial_scan_cl); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
5048 |
|
500023bd0818
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5963
diff
changeset
|
5049 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
|
6725
da91efe96a93
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changeset
|
5050 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
|
5986
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diff
changeset
|
5051 |
|
500023bd0818
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diff
changeset
|
5052 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
|
6725
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changeset
|
5053 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
|
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|
5054 |
|
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changeset
|
5055 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
da91efe96a93
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coleenp
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changeset
|
5056 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
|
da91efe96a93
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coleenp
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changeset
|
5057 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
|
5986
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diff
changeset
|
5058 |
|
500023bd0818
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5963
diff
changeset
|
5059 OopClosure* scan_root_cl = &only_scan_root_cl; |
|
6725
da91efe96a93
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changeset
|
5060 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
|
5986
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5963
diff
changeset
|
5061 |
|
500023bd0818
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5963
diff
changeset
|
5062 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
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changeset
|
5063 // We also need to mark copied objects. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5064 scan_root_cl = &scan_mark_root_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
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changeset
|
5065 scan_klasses_cl = &scan_mark_klasses_cl_s; |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5066 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5067 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5068 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5069 |
| 12080 | 5070 // Don't scan the scavengable methods in the code cache as part |
| 5071 // of strong root scanning. The code roots that point into a | |
| 5072 // region in the collection set are scanned when we scan the | |
| 5073 // region's RSet. | |
| 5074 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; | |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
5075 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5076 pss.start_strong_roots(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
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changeset
|
5077 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5078 SharedHeap::ScanningOption(so), |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5079 scan_root_cl, |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5080 &push_heap_rs_cl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5081 scan_klasses_cl, |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5082 worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5083 pss.end_strong_roots(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5084 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5085 { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5086 double start = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5087 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5088 evac.do_void(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5089 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
|
5090 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
|
5091 _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
|
5092 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
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diff
changeset
|
5093 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5094 _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
|
5095 _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
|
5096 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5097 if (ParallelGCVerbose) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5098 MutexLocker x(stats_lock()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5099 pss.print_termination_stats(worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5100 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5101 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5102 assert(pss.refs()->is_empty(), "should be empty"); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5103 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5104 // 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
|
5105 // destructors are executed here and are included as part of the |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5106 // "GC Worker Time". |
| 342 | 5107 } |
| 5108 | |
| 1611 | 5109 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
|
5110 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 5111 } |
| 5112 }; | |
| 5113 | |
| 5114 // *** Common G1 Evacuation Stuff | |
| 5115 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5116 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5117 |
| 342 | 5118 void |
| 5119 G1CollectedHeap:: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5120 g1_process_strong_roots(bool is_scavenging, |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
5121 ScanningOption so, |
| 342 | 5122 OopClosure* scan_non_heap_roots, |
| 5123 OopsInHeapRegionClosure* scan_rs, | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5124 G1KlassScanClosure* scan_klasses, |
| 342 | 5125 int worker_i) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5126 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5127 // First scan the strong roots |
| 342 | 5128 double ext_roots_start = os::elapsedTime(); |
| 5129 double closure_app_time_sec = 0.0; | |
| 5130 | |
| 5131 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
| 5132 | |
| 12080 | 5133 assert(so & SO_CodeCache || scan_rs != NULL, "must scan code roots somehow"); |
| 5134 // Walk the code cache/strong code roots w/o buffering, because StarTask | |
| 5135 // cannot handle unaligned oop locations. | |
| 5136 CodeBlobToOopClosure eager_scan_code_roots(scan_non_heap_roots, true /* do_marking */); | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5137 |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5138 process_strong_roots(false, // no scoping; this is parallel code |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5139 is_scavenging, so, |
| 342 | 5140 &buf_scan_non_heap_roots, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5141 &eager_scan_code_roots, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5142 scan_klasses |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5143 ); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5144 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5145 // 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
|
5146 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
|
5147 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5148 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5149 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5150 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5151 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
|
5152 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5153 |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5154 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 5155 buf_scan_non_heap_roots.done(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5156 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5157 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5158 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5159 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
|
5160 |
| 342 | 5161 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
|
5162 ((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
|
5163 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5164 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 5165 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5166 // 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
|
5167 // 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
|
5168 // 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
|
5169 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5170 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5171 if (mark_in_progress()) { |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5172 double satb_filter_start = os::elapsedTime(); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5173 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5174 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5175 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5176 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5177 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5178 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5179 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 5180 |
| 12080 | 5181 // If this is an initial mark pause, and we're not scanning |
| 5182 // the entire code cache, we need to mark the oops in the | |
| 5183 // strong code root lists for the regions that are not in | |
| 5184 // the collection set. | |
| 5185 // Note all threads participate in this set of root tasks. | |
| 5186 double mark_strong_code_roots_ms = 0.0; | |
| 5187 if (g1_policy()->during_initial_mark_pause() && !(so & SO_CodeCache)) { | |
| 5188 double mark_strong_roots_start = os::elapsedTime(); | |
| 5189 mark_strong_code_roots(worker_i); | |
| 5190 mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; | |
| 5191 } | |
| 5192 g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); | |
| 5193 | |
| 342 | 5194 // Now scan the complement of the collection set. |
| 5195 if (scan_rs != NULL) { | |
| 12080 | 5196 g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
| 342 | 5197 } |
| 5198 _process_strong_tasks->all_tasks_completed(); | |
| 5199 } | |
| 5200 | |
| 5201 void | |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5202 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure) { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5203 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5204 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
| 342 | 5205 } |
| 5206 | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5207 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5208 private: |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5209 BoolObjectClosure* _is_alive; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5210 int _initial_string_table_size; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5211 int _initial_symbol_table_size; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5212 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5213 bool _process_strings; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5214 int _strings_processed; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5215 int _strings_removed; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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5216 |
|
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|
5217 bool _process_symbols; |
|
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|
5218 int _symbols_processed; |
|
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|
5219 int _symbols_removed; |
|
17652
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5220 |
|
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|
5221 bool _do_in_parallel; |
|
17634
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|
5222 public: |
|
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|
5223 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
|
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5224 AbstractGangTask("Par String/Symbol table unlink"), _is_alive(is_alive), |
|
17652
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5225 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
|
17634
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5226 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
|
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5227 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
|
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5228 |
|
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|
5229 _initial_string_table_size = StringTable::the_table()->table_size(); |
|
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5230 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
|
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|
5231 if (process_strings) { |
|
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|
5232 StringTable::clear_parallel_claimed_index(); |
|
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|
5233 } |
|
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|
5234 if (process_symbols) { |
|
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|
5235 SymbolTable::clear_parallel_claimed_index(); |
|
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|
5236 } |
|
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|
5237 } |
|
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|
5238 |
|
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|
5239 ~G1StringSymbolTableUnlinkTask() { |
|
17652
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|
5240 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
|
17634
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5241 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
|
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|
5242 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
|
17652
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|
5243 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
|
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5244 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
|
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|
5245 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
|
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|
5246 } |
|
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|
5247 |
|
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|
5248 void work(uint worker_id) { |
|
17652
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|
5249 if (_do_in_parallel) { |
|
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|
5250 int strings_processed = 0; |
|
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|
5251 int strings_removed = 0; |
|
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|
5252 int symbols_processed = 0; |
|
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|
5253 int symbols_removed = 0; |
|
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|
5254 if (_process_strings) { |
|
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|
5255 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
|
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|
5256 Atomic::add(strings_processed, &_strings_processed); |
|
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|
5257 Atomic::add(strings_removed, &_strings_removed); |
|
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|
5258 } |
|
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|
5259 if (_process_symbols) { |
|
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|
5260 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
|
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|
5261 Atomic::add(symbols_processed, &_symbols_processed); |
|
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|
5262 Atomic::add(symbols_removed, &_symbols_removed); |
|
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|
5263 } |
|
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|
5264 } else { |
|
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|
5265 if (_process_strings) { |
|
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|
5266 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
|
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|
5267 } |
|
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|
5268 if (_process_symbols) { |
|
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|
5269 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
|
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|
5270 } |
|
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|
5271 } |
|
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|
5272 } |
|
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|
5273 |
|
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|
5274 size_t strings_processed() const { return (size_t)_strings_processed; } |
|
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|
5275 size_t strings_removed() const { return (size_t)_strings_removed; } |
|
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|
5276 |
|
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|
5277 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
|
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|
5278 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
|
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|
5279 }; |
|
5a32d2a3cc1e
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|
5280 |
|
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|
5281 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
|
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|
5282 bool process_strings, bool process_symbols) { |
|
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|
5283 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
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|
5284 _g1h->workers()->active_workers() : 1); |
|
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changeset
|
5285 |
|
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changeset
|
5286 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
|
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tschatzl
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|
5287 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
5a32d2a3cc1e
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|
5288 set_par_threads(n_workers); |
|
5a32d2a3cc1e
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diff
changeset
|
5289 workers()->run_task(&g1_unlink_task); |
|
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changeset
|
5290 set_par_threads(0); |
|
5a32d2a3cc1e
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changeset
|
5291 } else { |
|
5a32d2a3cc1e
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changeset
|
5292 g1_unlink_task.work(0); |
|
5a32d2a3cc1e
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|
5293 } |
|
5a32d2a3cc1e
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|
5294 if (G1TraceStringSymbolTableScrubbing) { |
|
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changeset
|
5295 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
|
5a32d2a3cc1e
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changeset
|
5296 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
|
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|
5297 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
|
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|
5298 g1_unlink_task.strings_processed(), g1_unlink_task.strings_removed(), |
|
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|
5299 g1_unlink_task.symbols_processed(), g1_unlink_task.symbols_removed()); |
|
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|
5300 } |
|
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|
5301 } |
|
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changeset
|
5302 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5303 // Weak Reference Processing support |
|
4dfb2df418f2
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diff
changeset
|
5304 |
|
4dfb2df418f2
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diff
changeset
|
5305 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
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diff
changeset
|
5306 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
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3973
diff
changeset
|
5307 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
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diff
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|
5308 // discovered by the CM ref processor. |
|
4dfb2df418f2
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diff
changeset
|
5309 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
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|
5310 G1CollectedHeap* _g1; |
|
4dfb2df418f2
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|
5311 public: |
|
4dfb2df418f2
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|
5312 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
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|
5313 bool do_object_b(oop p) { |
|
4dfb2df418f2
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johnc
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diff
changeset
|
5314 if (p != NULL) { |
|
4dfb2df418f2
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diff
changeset
|
5315 return true; |
|
4dfb2df418f2
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diff
changeset
|
5316 } |
|
4dfb2df418f2
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3973
diff
changeset
|
5317 return false; |
|
4dfb2df418f2
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diff
changeset
|
5318 } |
|
4dfb2df418f2
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diff
changeset
|
5319 }; |
|
4dfb2df418f2
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changeset
|
5320 |
|
4dfb2df418f2
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diff
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|
5321 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
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changeset
|
5322 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
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diff
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|
5323 // or is inside and copied. |
|
4dfb2df418f2
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|
5324 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
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3973
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changeset
|
5325 } |
|
4dfb2df418f2
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3973
diff
changeset
|
5326 |
|
4dfb2df418f2
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diff
changeset
|
5327 // Non Copying Keep Alive closure |
|
4dfb2df418f2
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diff
changeset
|
5328 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
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changeset
|
5329 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5330 public: |
|
4dfb2df418f2
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3973
diff
changeset
|
5331 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
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|
5332 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
4dfb2df418f2
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3973
diff
changeset
|
5333 void do_oop( oop* p) { |
|
4dfb2df418f2
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johnc
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3973
diff
changeset
|
5334 oop obj = *p; |
|
4dfb2df418f2
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changeset
|
5335 |
|
4dfb2df418f2
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diff
changeset
|
5336 if (_g1->obj_in_cs(obj)) { |
|
4dfb2df418f2
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changeset
|
5337 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5338 *p = obj->forwardee(); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5339 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5340 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5341 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5342 |
|
4dfb2df418f2
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diff
changeset
|
5343 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
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diff
changeset
|
5344 // serial and parallel code as long as different worker |
|
4dfb2df418f2
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diff
changeset
|
5345 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5346 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5347 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5348 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
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changeset
|
5349 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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diff
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|
5350 OopClosure* _copy_non_heap_obj_cl; |
|
6725
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|
5351 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
|
3979
4dfb2df418f2
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|
5352 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
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diff
changeset
|
5353 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5354 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5355 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
4dfb2df418f2
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changeset
|
5356 OopClosure* non_heap_obj_cl, |
|
6725
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|
5357 OopsInHeapRegionClosure* metadata_obj_cl, |
|
3979
4dfb2df418f2
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changeset
|
5358 G1ParScanThreadState* pss): |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5359 _g1h(g1h), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5360 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
6725
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|
5361 _copy_metadata_obj_cl(metadata_obj_cl), |
|
3979
4dfb2df418f2
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changeset
|
5362 _par_scan_state(pss) |
|
4dfb2df418f2
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|
5363 {} |
|
4dfb2df418f2
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parents:
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changeset
|
5364 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5365 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
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changeset
|
5366 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
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changeset
|
5367 |
|
4dfb2df418f2
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diff
changeset
|
5368 template <class T> void do_oop_work(T* p) { |
|
4dfb2df418f2
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changeset
|
5369 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
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parents:
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changeset
|
5370 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5371 if (_g1h->obj_in_cs(obj)) { |
|
4dfb2df418f2
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changeset
|
5372 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
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diff
changeset
|
5373 // to a new location or to itself in the event of an |
|
4dfb2df418f2
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changeset
|
5374 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5375 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
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diff
changeset
|
5376 // heap, update the RSet for the referent. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5377 // |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5378 // If the referent has not been forwarded then we have to keep |
|
4dfb2df418f2
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diff
changeset
|
5379 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
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parents:
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changeset
|
5380 // |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5381 // If the reference field is in the G1 heap then we can push |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5382 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5383 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5384 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5385 // new location, and the RSet updated. Otherwise we need to |
|
6725
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6629
diff
changeset
|
5386 // use the the non-heap or metadata closures directly to copy |
| 10405 | 5387 // the referent object and update the pointer, while avoiding |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5388 // updating the RSet. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5390 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5391 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5392 } else { |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5393 assert(!ClassLoaderDataGraph::contains((address)p), |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5394 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
5395 PTR_FORMAT, p)); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5396 _copy_non_heap_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 } |
|
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 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5400 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5401 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5402 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5403 // closure for each discovered list in some of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5404 // reference processing phases. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5405 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5406 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5407 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5408 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5409 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5410 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5411 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5412 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5413 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5414 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5415 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5416 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5417 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5418 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5419 void do_void() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5420 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5421 pss->trim_queue(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5422 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5424 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5425 // Parallel Reference Processing closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5426 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5427 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5428 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5429 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5430 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5431 private: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5432 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5433 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5434 FlexibleWorkGang* _workers; |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5435 int _active_workers; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5436 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5437 public: |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5438 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5439 FlexibleWorkGang* workers, |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5440 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 int n_workers) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5442 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5443 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5444 _workers(workers), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 _active_workers(n_workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
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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
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parents:
3973
diff
changeset
|
5450 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5451 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5452 virtual void execute(EnqueueTask& task); |
|
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 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5456 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5457 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5458 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5459 ProcessTask& _proc_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5460 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5461 RefToScanQueueSet *_task_queues; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5462 ParallelTaskTerminator* _terminator; |
|
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|
5463 |
|
4dfb2df418f2
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diff
changeset
|
5464 public: |
|
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changeset
|
5465 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
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|
5466 G1CollectedHeap* g1h, |
|
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|
5467 RefToScanQueueSet *task_queues, |
|
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|
5468 ParallelTaskTerminator* terminator) : |
|
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|
5469 AbstractGangTask("Process reference objects in parallel"), |
|
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changeset
|
5470 _proc_task(proc_task), |
|
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parents:
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diff
changeset
|
5471 _g1h(g1h), |
|
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changeset
|
5472 _task_queues(task_queues), |
|
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changeset
|
5473 _terminator(terminator) |
|
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|
5474 {} |
|
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changeset
|
5475 |
|
4728
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|
5476 virtual void work(uint worker_id) { |
|
3979
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|
5477 // The reference processing task executed by a single worker. |
|
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changeset
|
5478 ResourceMark rm; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5479 HandleMark hm; |
|
4dfb2df418f2
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diff
changeset
|
5480 |
|
4dfb2df418f2
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changeset
|
5481 G1STWIsAliveClosure is_alive(_g1h); |
|
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parents:
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changeset
|
5482 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5483 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
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|
5484 |
|
4dfb2df418f2
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|
5485 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
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|
5486 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
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|
5487 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
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changeset
|
5488 |
|
4dfb2df418f2
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changeset
|
5489 pss.set_evac_closure(&scan_evac_cl); |
|
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|
5490 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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|
5491 pss.set_partial_scan_closure(&partial_scan_cl); |
|
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|
5492 |
|
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|
5493 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
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|
5494 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
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|
5495 |
|
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|
5496 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
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|
5497 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
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|
5498 |
|
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changeset
|
5499 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
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|
5500 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
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|
5501 |
|
4dfb2df418f2
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diff
changeset
|
5502 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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parents:
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diff
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|
5503 // We also need to mark copied objects. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5504 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
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coleenp
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changeset
|
5505 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
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parents:
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|
5506 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5507 |
|
4dfb2df418f2
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diff
changeset
|
5508 // Keep alive closure. |
|
6725
da91efe96a93
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coleenp
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diff
changeset
|
5509 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
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diff
changeset
|
5510 |
|
4dfb2df418f2
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diff
changeset
|
5511 // Complete GC closure |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5512 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
4dfb2df418f2
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parents:
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changeset
|
5513 |
|
4dfb2df418f2
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diff
changeset
|
5514 // Call the reference processing task's work routine. |
|
4728
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diff
changeset
|
5515 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
4dfb2df418f2
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diff
changeset
|
5516 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5517 // Note we cannot assert that the refs array is empty here as not all |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5518 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5519 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5520 // the queue may not be empty. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5521 } |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5522 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5523 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5524 // Driver routine for parallel reference processing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5525 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5526 // task and has the worker threads execute it. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5527 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5528 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5529 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5530 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5531 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5532 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5533 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5534 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5535 _g1h->set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5536 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5537 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5538 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5539 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5540 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5541 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5542 EnqueueTask& _enq_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5543 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5544 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5545 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5546 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5547 _enq_task(enq_task) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5548 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5549 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5550 virtual void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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diff
changeset
|
5551 _enq_task.work(worker_id); |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5552 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5553 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5554 |
| 10405 | 5555 // Driver routine for parallel reference enqueueing. |
|
3979
4dfb2df418f2
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diff
changeset
|
5556 // Creates an instance of the ref enqueueing gang |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5557 // task and has the worker threads execute it. |
|
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 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5560 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5561 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5562 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5563 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5564 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5565 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5566 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5567 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5568 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5569 // End of weak reference support closures |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5570 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5571 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5572 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5573 // objects discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5574 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5575 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5576 protected: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5577 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5578 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5579 ParallelTaskTerminator _terminator; |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5580 uint _n_workers; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5581 |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5582 public: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5583 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
|
5584 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5585 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5586 _queues(task_queues), |
|
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diff
changeset
|
5587 _terminator(workers, _queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5588 _n_workers(workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5589 { } |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5590 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5591 void work(uint worker_id) { |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5592 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5593 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5594 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5595 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5596 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5597 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5598 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5599 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5600 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5601 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5602 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5603 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5604 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5605 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5606 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5607 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5608 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5609 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5610 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
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|
5611 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
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|
5612 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5613 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5614 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
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parents:
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diff
changeset
|
5615 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5616 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5617 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5618 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5619 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5620 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5621 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5622 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5623 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5624 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5625 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5626 // to be copied. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5627 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5628 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5629 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5630 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5631 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
|
5632 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5633 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5634 // 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
|
5635 // 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
|
5636 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5637 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5638 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5639 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5640 // 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
|
5641 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5642 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5643 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5644 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5645 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5646 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5647 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5648 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5649 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5650 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5651 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5652 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5653 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5654 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5655 iter.move_to_next(); |
|
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 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5658 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5659 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5660 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5661 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5662 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5663 assert(pss.refs()->is_empty(), "should be"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5665 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5666 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5667 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5668 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5669 double ref_proc_start = os::elapsedTime(); |
|
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 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5672 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5673 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5674 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5675 // 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
|
5676 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5677 // by following an RSet entry). |
|
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 // 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
|
5680 // 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
|
5681 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5682 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5683 // but would not have treated the reference object as a regular oop. |
| 10405 | 5684 // 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
|
5685 // referent object. |
|
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 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5688 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5689 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5690 // 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
|
5691 // 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
|
5692 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5693 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5694 |
| 4711 | 5695 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5696 no_of_gc_workers == workers()->active_workers(), |
| 5697 "Need to reset active GC workers"); | |
| 5698 | |
| 5699 set_par_threads(no_of_gc_workers); | |
| 5700 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5701 no_of_gc_workers, | |
| 5702 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5710 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5711 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5712 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5713 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5714 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5715 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5716 // of JNI refs is serial and performed serially by the current thread |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5717 // 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
|
5718 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5719 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 // Use only a single queue for this PSS. |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5721 G1ParScanThreadState pss(this, 0, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5722 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 G1ParScanHeapEvacClosure scan_evac_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5727 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5728 G1ParScanPartialArrayClosure partial_scan_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5729 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5730 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5731 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5732 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 assert(pss.refs()->is_empty(), "pre-condition"); |
|
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 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5737 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5738 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5739 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5740 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5741 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5743 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
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 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5746 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5747 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5748 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5749 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5750 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5751 // Keep alive closure. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5752 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5753 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5754 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5755 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5756 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5757 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5758 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5759 |
| 10405 | 5760 ReferenceProcessorStats stats; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5761 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5762 // Serial reference processing... |
| 10405 | 5763 stats = rp->process_discovered_references(&is_alive, |
| 5764 &keep_alive, | |
| 5765 &drain_queue, | |
| 5766 NULL, | |
| 5767 _gc_timer_stw); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5768 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5769 // Parallel reference processing |
| 6819 | 5770 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5771 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5772 | |
| 5773 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
| 10405 | 5774 stats = rp->process_discovered_references(&is_alive, |
| 5775 &keep_alive, | |
| 5776 &drain_queue, | |
| 5777 &par_task_executor, | |
| 5778 _gc_timer_stw); | |
| 5779 } | |
| 5780 | |
| 5781 _gc_tracer_stw->report_gc_reference_stats(stats); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5782 // We have completed copying any necessary live referent objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5783 // (that were not copied during the actual pause) so we can |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5784 // retire any active alloc buffers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5785 pss.retire_alloc_buffers(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5786 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5787 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5788 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
|
5789 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
|
5790 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5791 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5792 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5793 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5794 double ref_enq_start = os::elapsedTime(); |
|
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 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5797 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
|
5798 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5799 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5800 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5801 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5802 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5803 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5804 } else { |
| 10405 | 5805 // Parallel reference enqueueing |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5806 |
| 6819 | 5807 assert(no_of_gc_workers == workers()->active_workers(), |
| 5808 "Need to reset active workers"); | |
| 5809 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5810 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5811 | |
| 5812 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
|
5813 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5814 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5815 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5816 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5817 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5818 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5819 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5820 // 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
|
5821 // Should we do that here also? We could, but it is a serial operation |
| 10405 | 5822 // and could significantly increase the pause time. |
|
3979
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 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
|
5825 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
|
5826 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5827 |
| 10405 | 5828 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
|
5829 _expand_heap_after_alloc_failure = true; |
| 10405 | 5830 _evacuation_failed = false; |
| 342 | 5831 |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5832 // 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
|
5833 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
|
5834 |
| 342 | 5835 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
|
5836 |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5837 // Disable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5838 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
|
5839 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
|
5840 hot_card_cache->set_use_cache(false); |
| 889 | 5841 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5842 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5843 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5844 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5845 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5846 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5847 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5848 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5849 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5850 "If not dynamic should be using all the workers"); |
| 4711 | 5851 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5852 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5853 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5854 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5855 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5856 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5857 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5858 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5859 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5860 |
| 5861 init_for_evac_failure(NULL); | |
| 5862 | |
| 5863 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
|
5864 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5865 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
|
5866 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5867 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5868 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5869 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5870 StrongRootsScope srs(this); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5871 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5872 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5873 // 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
|
5874 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5875 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5876 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5877 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5878 "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
|
5879 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5880 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5881 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
|
5882 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5883 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5884 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5885 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5886 // 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
|
5887 // 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
|
5888 // 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
|
5889 // 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
|
5890 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5891 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5892 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5893 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
|
5894 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
|
5895 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5896 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5897 (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
|
5898 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
|
5899 |
| 342 | 5900 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5901 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5902 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5903 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5904 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5905 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5906 // not copied during the pause. |
| 6819 | 5907 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5908 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5909 // Weak root processing. |
| 342 | 5910 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5911 G1STWIsAliveClosure is_alive(this); |
| 342 | 5912 G1KeepAliveClosure keep_alive(this); |
| 5913 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 5914 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5915 |
| 10405 | 5916 release_gc_alloc_regions(n_workers, evacuation_info); |
| 342 | 5917 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
|
5918 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5919 // 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
|
5920 // 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
|
5921 // 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
|
5922 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
|
5923 hot_card_cache->set_use_cache(true); |
| 342 | 5924 |
| 12080 | 5925 // Migrate the strong code roots attached to each region in |
| 5926 // the collection set. Ideally we would like to do this | |
| 5927 // after we have finished the scanning/evacuation of the | |
| 5928 // strong code roots for a particular heap region. | |
| 5929 migrate_strong_code_roots(); | |
| 5930 | |
| 5931 if (g1_policy()->during_initial_mark_pause()) { | |
| 5932 // Reset the claim values set during marking the strong code roots | |
| 5933 reset_heap_region_claim_values(); | |
| 5934 } | |
| 5935 | |
| 342 | 5936 finalize_for_evac_failure(); |
| 5937 | |
| 5938 if (evacuation_failed()) { | |
| 5939 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5940 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5941 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5942 // 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
|
5943 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5944 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 5945 } |
| 5946 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5947 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5948 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5949 // this after the card table is cleaned (and verified) as |
| 10405 | 5950 // the act of enqueueing entries on to the pending list |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5951 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5952 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5953 // RSets. |
| 6819 | 5954 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5955 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5956 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5957 RedirtyLoggedCardTableEntryFastClosure redirty; |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5958 dirty_card_queue_set().set_closure(&redirty); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5959 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
| 1111 | 5960 |
| 5961 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); | |
| 5962 dcq.merge_bufferlists(&dirty_card_queue_set()); | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5963 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5964 } |
| 342 | 5965 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5966 } | |
| 5967 | |
| 2152 | 5968 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5969 FreeRegionList* free_list, | |
| 5970 bool par) { | |
| 5971 assert(!hr->isHumongous(), "this is only for non-humongous regions"); | |
| 5972 assert(!hr->is_empty(), "the region should not be empty"); | |
| 5973 assert(free_list != NULL, "pre-condition"); | |
| 5974 | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5975 // 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
|
5976 // 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
|
5977 // (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
|
5978 if (!hr->is_young()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5979 _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
|
5980 } |
| 2152 | 5981 hr->hr_clear(par, true /* clear_space */); |
|
2432
455328d90876
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
tonyp
parents:
2369
diff
changeset
|
5982 free_list->add_as_head(hr); |
| 2152 | 5983 } |
| 5984 | |
| 5985 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5986 FreeRegionList* free_list, | |
| 5987 bool par) { | |
| 5988 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 5989 assert(free_list != NULL, "pre-condition"); | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5990 |
| 2152 | 5991 size_t hr_capacity = hr->capacity(); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5992 // 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
|
5993 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5994 uint last_index = hr->last_hc_index(); |
| 2152 | 5995 hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5996 free_region(hr, free_list, par); |
| 2152 | 5997 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5998 uint i = hr->hrs_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5999 while (i < last_index) { |
| 3766 | 6000 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6001 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 6002 curr_hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6003 free_region(curr_hr, free_list, par); |
| 2152 | 6004 i += 1; |
| 6005 } | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6006 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6007 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6008 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6009 const HeapRegionSetCount& humongous_regions_removed) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6010 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6011 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6012 _old_set.bulk_remove(old_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6013 _humongous_set.bulk_remove(humongous_regions_removed); |
|
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 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6016 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6017 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6018 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6019 assert(list != NULL, "list can't be null"); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6020 if (!list->is_empty()) { |
| 2152 | 6021 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6022 _free_list.add_as_head(list); |
|
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 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6026 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6027 assert(_summary_bytes_used >= bytes, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6028 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" should be >= bytes: "SIZE_FORMAT, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6029 _summary_bytes_used, bytes)); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6030 _summary_bytes_used -= bytes; |
| 342 | 6031 } |
| 6032 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
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diff
changeset
|
6033 class G1ParCleanupCTTask : public AbstractGangTask { |
| 12343 | 6034 G1SATBCardTableModRefBS* _ct_bs; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
changeset
|
6035 G1CollectedHeap* _g1h; |
|
940
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6841313: G1: dirty cards of survivor regions in parallel
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|
6036 HeapRegion* volatile _su_head; |
|
796
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6819065: G1: eliminate high serial card table clearing time
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794
diff
changeset
|
6037 public: |
| 12343 | 6038 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
6039 G1CollectedHeap* g1h) : |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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794
diff
changeset
|
6040 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
|
6041 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6042 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6043 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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diff
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|
6044 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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parents:
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diff
changeset
|
6045 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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parents:
794
diff
changeset
|
6046 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6047 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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diff
changeset
|
6048 } |
|
8624da129f0b
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apetrusenko
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936
diff
changeset
|
6049 |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6050 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
|
6051 // 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
|
6052 if (!r->is_survivor()) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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parents:
794
diff
changeset
|
6053 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6054 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6055 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6056 }; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6057 |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6058 #ifndef PRODUCT |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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parents:
936
diff
changeset
|
6059 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
6060 G1CollectedHeap* _g1h; |
| 12343 | 6061 G1SATBCardTableModRefBS* _ct_bs; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6062 public: |
| 12343 | 6063 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, G1SATBCardTableModRefBS* ct_bs) |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
6064 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6065 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
|
6066 if (r->is_survivor()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
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diff
changeset
|
6067 _g1h->verify_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6068 } else { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6069 _g1h->verify_not_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6070 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6071 return false; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6072 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6073 }; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6074 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6075 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
|
6076 // All of the region should be clean. |
| 12343 | 6077 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
|
6078 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
|
6079 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
|
6080 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6081 |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6082 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
|
6083 // 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
|
6084 // 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
|
6085 // 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
|
6086 // 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
|
6087 // 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
|
6088 // 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
|
6089 // is dirty. |
| 12343 | 6090 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
|
6091 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
|
6092 if (hr->is_young()) { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6093 ct_bs->verify_g1_young_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6094 } else { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6095 ct_bs->verify_dirty_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6096 } |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6097 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6098 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6099 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
| 12343 | 6100 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6101 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
|
6102 verify_dirty_region(hr); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6103 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6104 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6105 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6106 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6107 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6108 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6109 #endif |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6110 |
| 342 | 6111 void G1CollectedHeap::cleanUpCardTable() { |
| 12343 | 6112 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 6113 double start = os::elapsedTime(); |
| 6114 | |
| 4023 | 6115 { |
| 6116 // Iterate over the dirty cards region list. | |
| 6117 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 6118 | |
| 4711 | 6119 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 6120 set_par_threads(); | |
| 4023 | 6121 workers()->run_task(&cleanup_task); |
| 6122 set_par_threads(0); | |
| 6123 } else { | |
| 6124 while (_dirty_cards_region_list) { | |
| 6125 HeapRegion* r = _dirty_cards_region_list; | |
| 6126 cleanup_task.clear_cards(r); | |
| 6127 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 6128 if (_dirty_cards_region_list == r) { | |
| 6129 // The last region. | |
| 6130 _dirty_cards_region_list = NULL; | |
| 6131 } | |
| 6132 r->set_next_dirty_cards_region(NULL); | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
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|
6133 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6134 } |
| 4023 | 6135 #ifndef PRODUCT |
| 6136 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 6137 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 6138 heap_region_iterate(&cleanup_verifier); | |
| 6139 } | |
| 6140 #endif | |
|
940
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6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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936
diff
changeset
|
6141 } |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6142 |
| 342 | 6143 double elapsed = os::elapsedTime() - start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6144 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 6145 } |
| 6146 | |
| 10405 | 6147 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
| 2152 | 6148 size_t pre_used = 0; |
| 6149 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 6150 | |
| 342 | 6151 double young_time_ms = 0.0; |
| 6152 double non_young_time_ms = 0.0; | |
| 6153 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6154 // Since the collection set is a superset of the the young list, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6155 // all we need to do to clear the young list is clear its |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6156 // head and length, and unlink any young regions in the code below |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6157 _young_list->clear(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6158 |
| 342 | 6159 G1CollectorPolicy* policy = g1_policy(); |
| 6160 | |
| 6161 double start_sec = os::elapsedTime(); | |
| 6162 bool non_young = true; | |
| 6163 | |
| 6164 HeapRegion* cur = cs_head; | |
| 6165 int age_bound = -1; | |
| 6166 size_t rs_lengths = 0; | |
| 6167 | |
| 6168 while (cur != NULL) { | |
| 2361 | 6169 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 6170 if (non_young) { |
| 6171 if (cur->is_young()) { | |
| 6172 double end_sec = os::elapsedTime(); | |
| 6173 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 6174 non_young_time_ms += elapsed_ms; | |
| 6175 | |
| 6176 start_sec = os::elapsedTime(); | |
| 6177 non_young = false; | |
| 6178 } | |
| 6179 } else { | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6180 if (!cur->is_young()) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6181 double end_sec = os::elapsedTime(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6182 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6183 young_time_ms += elapsed_ms; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6184 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6185 start_sec = os::elapsedTime(); |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
6186 non_young = true; |
|
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|
6187 } |
| 342 | 6188 } |
| 6189 | |
| 6190 rs_lengths += cur->rem_set()->occupied(); | |
| 6191 | |
| 6192 HeapRegion* next = cur->next_in_collection_set(); | |
| 6193 assert(cur->in_collection_set(), "bad CS"); | |
| 6194 cur->set_next_in_collection_set(NULL); | |
| 6195 cur->set_in_collection_set(false); | |
| 6196 | |
| 6197 if (cur->is_young()) { | |
| 6198 int index = cur->young_index_in_cset(); | |
|
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|
6199 assert(index != -1, "invariant"); |
|
6010
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|
6200 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 6201 size_t words_survived = _surviving_young_words[index]; |
| 6202 cur->record_surv_words_in_group(words_survived); | |
|
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|
6203 |
|
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|
6204 // At this point the we have 'popped' cur from the collection set |
|
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|
6205 // (linked via next_in_collection_set()) but it is still in the |
|
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|
6206 // young list (linked via next_young_region()). Clear the |
|
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|
6207 // _next_young_region field. |
|
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|
6208 cur->set_next_young_region(NULL); |
| 342 | 6209 } else { |
| 6210 int index = cur->young_index_in_cset(); | |
|
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|
6211 assert(index == -1, "invariant"); |
| 342 | 6212 } |
| 6213 | |
| 6214 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 6215 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 6216 "invariant" ); | |
| 6217 | |
| 6218 if (!cur->evacuation_failed()) { | |
|
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|
6219 MemRegion used_mr = cur->used_region(); |
|
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|
6220 |
| 342 | 6221 // And the region is empty. |
|
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|
6222 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
|
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|
6223 pre_used += cur->used(); |
|
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|
6224 free_region(cur, &local_free_list, false /* par */); |
| 342 | 6225 } else { |
| 6226 cur->uninstall_surv_rate_group(); | |
|
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|
6227 if (cur->is_young()) { |
| 342 | 6228 cur->set_young_index_in_cset(-1); |
|
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|
6229 } |
| 342 | 6230 cur->set_not_young(); |
| 6231 cur->set_evacuation_failed(false); | |
| 4072 | 6232 // The region is now considered to be old. |
| 6233 _old_set.add(cur); | |
| 10405 | 6234 evacuation_info.increment_collectionset_used_after(cur->used()); |
| 342 | 6235 } |
| 6236 cur = next; | |
| 6237 } | |
| 6238 | |
| 10405 | 6239 evacuation_info.set_regions_freed(local_free_list.length()); |
| 342 | 6240 policy->record_max_rs_lengths(rs_lengths); |
| 6241 policy->cset_regions_freed(); | |
| 6242 | |
| 6243 double end_sec = os::elapsedTime(); | |
| 6244 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
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6245 |
|
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|
6246 if (non_young) { |
| 342 | 6247 non_young_time_ms += elapsed_ms; |
|
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|
6248 } else { |
| 342 | 6249 young_time_ms += elapsed_ms; |
|
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|
6250 } |
| 342 | 6251 |
|
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|
6252 prepend_to_freelist(&local_free_list); |
|
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|
6253 decrement_summary_bytes(pre_used); |
|
6219
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|
6254 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
|
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|
6255 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6256 } |
| 6257 | |
|
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|
6258 // This routine is similar to the above but does not record |
|
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|
6259 // any policy statistics or update free lists; we are abandoning |
|
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|
6260 // the current incremental collection set in preparation of a |
|
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|
6261 // full collection. After the full GC we will start to build up |
|
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|
6262 // the incremental collection set again. |
|
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|
6263 // This is only called when we're doing a full collection |
|
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|
6264 // and is immediately followed by the tearing down of the young list. |
|
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|
6265 |
|
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|
6266 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
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|
6267 HeapRegion* cur = cs_head; |
|
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|
6268 |
|
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|
6269 while (cur != NULL) { |
|
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|
6270 HeapRegion* next = cur->next_in_collection_set(); |
|
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|
6271 assert(cur->in_collection_set(), "bad CS"); |
|
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|
6272 cur->set_next_in_collection_set(NULL); |
|
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|
6273 cur->set_in_collection_set(false); |
|
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|
6274 cur->set_young_index_in_cset(-1); |
|
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|
6275 cur = next; |
|
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|
6276 } |
|
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|
6277 } |
|
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|
6278 |
| 2152 | 6279 void G1CollectedHeap::set_free_regions_coming() { |
| 6280 if (G1ConcRegionFreeingVerbose) { | |
| 6281 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6282 "setting free regions coming"); | |
| 6283 } | |
| 6284 | |
| 6285 assert(!free_regions_coming(), "pre-condition"); | |
| 6286 _free_regions_coming = true; | |
| 342 | 6287 } |
| 6288 | |
| 2152 | 6289 void G1CollectedHeap::reset_free_regions_coming() { |
|
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|
6290 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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|
6291 |
| 2152 | 6292 { |
| 6293 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6294 _free_regions_coming = false; | |
| 6295 SecondaryFreeList_lock->notify_all(); | |
| 6296 } | |
| 6297 | |
| 6298 if (G1ConcRegionFreeingVerbose) { | |
| 6299 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6300 "reset free regions coming"); | |
| 342 | 6301 } |
| 6302 } | |
| 6303 | |
| 2152 | 6304 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6305 // Most of the time we won't have to wait, so let's do a quick test | |
| 6306 // first before we take the lock. | |
| 6307 if (!free_regions_coming()) { | |
| 6308 return; | |
| 6309 } | |
| 6310 | |
| 6311 if (G1ConcRegionFreeingVerbose) { | |
| 6312 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6313 "waiting for free regions"); | |
| 342 | 6314 } |
| 6315 | |
| 6316 { | |
| 2152 | 6317 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6318 while (free_regions_coming()) { | |
| 6319 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6320 } |
| 2152 | 6321 } |
| 6322 | |
| 6323 if (G1ConcRegionFreeingVerbose) { | |
| 6324 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6325 "done waiting for free regions"); | |
| 6326 } | |
| 342 | 6327 } |
| 6328 | |
| 6329 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6330 assert(heap_lock_held_for_gc(), | |
| 6331 "the heap lock should already be held by or for this thread"); | |
| 6332 _young_list->push_region(hr); | |
| 6333 } | |
| 6334 | |
| 6335 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6336 private: | |
| 6337 bool _success; | |
| 6338 public: | |
| 6339 NoYoungRegionsClosure() : _success(true) { } | |
| 6340 bool doHeapRegion(HeapRegion* r) { | |
| 6341 if (r->is_young()) { | |
| 6342 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6343 r->bottom(), r->end()); | |
| 6344 _success = false; | |
| 6345 } | |
| 6346 return false; | |
| 6347 } | |
| 6348 bool success() { return _success; } | |
| 6349 }; | |
| 6350 | |
|
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|
6351 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
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|
6352 bool ret = _young_list->check_list_empty(check_sample); |
|
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|
6353 |
|
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|
6354 if (check_heap) { |
| 342 | 6355 NoYoungRegionsClosure closure; |
| 6356 heap_region_iterate(&closure); | |
| 6357 ret = ret && closure.success(); | |
| 6358 } | |
| 6359 | |
| 6360 return ret; | |
| 6361 } | |
| 6362 | |
| 4072 | 6363 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6364 private: | |
|
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|
6365 HeapRegionSet *_old_set; |
| 2152 | 6366 |
| 342 | 6367 public: |
|
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|
6368 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6369 |
| 342 | 6370 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6371 if (r->is_empty()) { |
| 6372 // We ignore empty regions, we'll empty the free list afterwards | |
| 6373 } else if (r->is_young()) { | |
| 6374 // We ignore young regions, we'll empty the young list afterwards | |
| 6375 } else if (r->isHumongous()) { | |
| 6376 // We ignore humongous regions, we're not tearing down the | |
| 6377 // humongous region set | |
| 342 | 6378 } else { |
| 4072 | 6379 // The rest should be old |
| 6380 _old_set->remove(r); | |
| 342 | 6381 } |
| 6382 return false; | |
| 6383 } | |
| 6384 | |
| 4072 | 6385 ~TearDownRegionSetsClosure() { |
| 6386 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6387 } |
| 342 | 6388 }; |
| 6389 | |
| 4072 | 6390 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6391 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6392 | |
| 6393 if (!free_list_only) { | |
| 6394 TearDownRegionSetsClosure cl(&_old_set); | |
| 6395 heap_region_iterate(&cl); | |
| 6396 | |
| 6397 // Need to do this after the heap iteration to be able to | |
| 6398 // recognize the young regions and ignore them during the iteration. | |
| 6399 _young_list->empty_list(); | |
| 6400 } | |
| 6401 _free_list.remove_all(); | |
| 6402 } | |
| 6403 | |
| 6404 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6405 private: | |
| 6406 bool _free_list_only; | |
|
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|
6407 HeapRegionSet* _old_set; |
| 4072 | 6408 FreeRegionList* _free_list; |
| 6409 size_t _total_used; | |
| 6410 | |
| 6411 public: | |
| 6412 RebuildRegionSetsClosure(bool free_list_only, | |
|
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|
6413 HeapRegionSet* old_set, FreeRegionList* free_list) : |
| 4072 | 6414 _free_list_only(free_list_only), |
| 6415 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 6416 assert(_free_list->is_empty(), "pre-condition"); | |
| 6417 if (!free_list_only) { | |
| 6418 assert(_old_set->is_empty(), "pre-condition"); | |
| 6419 } | |
| 6420 } | |
| 6421 | |
| 6422 bool doHeapRegion(HeapRegion* r) { | |
| 6423 if (r->continuesHumongous()) { | |
| 6424 return false; | |
| 6425 } | |
| 6426 | |
| 6427 if (r->is_empty()) { | |
| 6428 // Add free regions to the free list | |
| 6429 _free_list->add_as_tail(r); | |
| 6430 } else if (!_free_list_only) { | |
| 6431 assert(!r->is_young(), "we should not come across young regions"); | |
| 6432 | |
| 6433 if (r->isHumongous()) { | |
| 6434 // We ignore humongous regions, we left the humongous set unchanged | |
| 6435 } else { | |
| 6436 // The rest should be old, add them to the old set | |
| 6437 _old_set->add(r); | |
| 6438 } | |
| 6439 _total_used += r->used(); | |
| 6440 } | |
| 6441 | |
| 6442 return false; | |
| 6443 } | |
| 6444 | |
| 6445 size_t total_used() { | |
| 6446 return _total_used; | |
| 6447 } | |
| 6448 }; | |
| 6449 | |
| 6450 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6451 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6452 | |
| 6453 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); | |
| 6454 heap_region_iterate(&cl); | |
| 6455 | |
| 6456 if (!free_list_only) { | |
| 6457 _summary_bytes_used = cl.total_used(); | |
| 6458 } | |
| 6459 assert(_summary_bytes_used == recalculate_used(), | |
| 6460 err_msg("inconsistent _summary_bytes_used, " | |
| 6461 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 6462 _summary_bytes_used, recalculate_used())); | |
| 342 | 6463 } |
| 6464 | |
| 6465 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6466 _refine_cte_cl->set_concurrent(concurrent); | |
| 6467 } | |
| 6468 | |
| 6469 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6470 HeapRegion* hr = heap_region_containing(p); | |
| 6471 if (hr == NULL) { | |
|
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|
6472 return false; |
| 342 | 6473 } else { |
| 6474 return hr->is_in(p); | |
| 6475 } | |
| 6476 } | |
| 2152 | 6477 |
|
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|
6478 // Methods for the mutator alloc region |
|
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|
6479 |
|
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|
6480 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
|
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|
6481 bool force) { |
|
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|
6482 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
|
6483 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6484 "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
|
6485 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
|
6486 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6487 HeapRegion* new_alloc_region = new_region(word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6488 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6489 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6490 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6491 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6492 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6493 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6494 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6495 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6496 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6497 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6498 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
|
6499 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6500 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
|
6501 assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6502 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6503 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6504 _summary_bytes_used += allocated_bytes; |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6505 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6506 // 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
|
6507 // 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
|
6508 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6509 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6510 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6511 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6512 HeapRegion* MutatorAllocRegion::allocate_new_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6513 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6514 return _g1h->new_mutator_alloc_region(word_size, force); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6515 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6516 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6517 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6518 // 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
|
6519 // in the workgroup. |
| 4711 | 6520 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
|
6521 uint n_workers = workers()->active_workers(); |
| 4711 | 6522 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6523 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6524 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6525 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6526 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
|
6527 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6528 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6529 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6530 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6531 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6532 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6533 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6534 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6535 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6536 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6537 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6538 // 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
|
6539 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6540 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
|
6541 uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6542 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6543 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
|
6544 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6545 if (count < g1_policy()->max_regions(ap)) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6546 HeapRegion* new_alloc_region = new_region(word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6547 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6548 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6549 // 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
|
6550 // 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
|
6551 // for survivors too. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6552 new_alloc_region->set_saved_mark(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6553 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6554 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6555 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6556 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6557 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6558 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6559 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
|
6560 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
|
6561 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6562 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6563 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
|
6564 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6565 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6566 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6567 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6568 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6569 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
|
6570 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6571 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6572 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
|
6573 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
|
6574 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
|
6575 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6576 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6577 } else { |
| 6578 _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
|
6579 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6580 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6581 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6582 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6583 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6584 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6585 assert(!force, "not supported for GC alloc regions"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6586 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6587 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6588 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6589 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6590 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6591 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6592 GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6593 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6594 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6595 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6596 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6597 assert(!force, "not supported for GC alloc regions"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6598 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6599 } |
|
f44782f04dd4
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|
6600 |
|
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|
6601 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
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|
6602 size_t allocated_bytes) { |
|
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|
6603 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
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6604 GCAllocForTenured); |
|
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|
6605 } |
|
2433
abdfc822206f
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2432
diff
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|
6606 // Heap region set verification |
|
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diff
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|
6607 |
| 2152 | 6608 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6609 private: | |
|
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|
6610 HeapRegionSet* _old_set; |
|
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|
6611 HeapRegionSet* _humongous_set; |
|
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|
6612 FreeRegionList* _free_list; |
| 2152 | 6613 |
| 6614 public: | |
|
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|
6615 HeapRegionSetCount _old_count; |
|
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|
6616 HeapRegionSetCount _humongous_count; |
|
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|
6617 HeapRegionSetCount _free_count; |
|
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|
6618 |
|
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|
6619 VerifyRegionListsClosure(HeapRegionSet* old_set, |
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|
6620 HeapRegionSet* humongous_set, |
| 2152 | 6621 FreeRegionList* free_list) : |
|
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|
6622 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
|
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|
6623 _old_count(), _humongous_count(), _free_count(){ } |
| 2152 | 6624 |
| 6625 bool doHeapRegion(HeapRegion* hr) { | |
| 6626 if (hr->continuesHumongous()) { | |
| 6627 return false; | |
| 6628 } | |
| 6629 | |
| 6630 if (hr->is_young()) { | |
| 6631 // TODO | |
| 6632 } else if (hr->startsHumongous()) { | |
|
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|
6633 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->region_num())); |
|
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|
6634 _humongous_count.increment(1u, hr->capacity()); |
| 2152 | 6635 } else if (hr->is_empty()) { |
|
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|
6636 assert(hr->containing_set() == _free_list, err_msg("Heap region %u is empty but not on the free list.", hr->region_num())); |
|
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|
6637 _free_count.increment(1u, hr->capacity()); |
| 4072 | 6638 } else { |
|
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|
6639 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->region_num())); |
|
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|
6640 _old_count.increment(1u, hr->capacity()); |
| 2152 | 6641 } |
| 6642 return false; | |
| 6643 } | |
|
17736
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|
6644 |
|
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|
6645 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
|
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|
6646 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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|
6647 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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|
6648 old_set->total_capacity_bytes(), _old_count.capacity())); |
|
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|
6649 |
|
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|
6650 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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|
6651 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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|
6652 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
|
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|
6653 |
|
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|
6654 guarantee(free_list->length() == _free_count.length(), err_msg("Free list count mismatch. Expected %u, actual %u.", free_list->length(), _free_count.length())); |
|
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|
6655 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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|
6656 free_list->total_capacity_bytes(), _free_count.capacity())); |
|
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|
6657 } |
| 2152 | 6658 }; |
| 6659 | |
|
6010
720b6a76dd9d
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diff
changeset
|
6660 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
| 3766 | 6661 HeapWord* bottom) { |
| 6662 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6663 MemRegion mr(bottom, end); | |
| 6664 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6665 // This might return NULL if the allocation fails | |
|
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
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6752
diff
changeset
|
6666 return new HeapRegion(hrs_index, _bot_shared, mr); |
| 3766 | 6667 } |
| 6668 | |
| 2152 | 6669 void G1CollectedHeap::verify_region_sets() { |
| 6670 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6671 | |
| 6672 // First, check the explicit lists. | |
|
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|
6673 _free_list.verify_list(); |
| 2152 | 6674 { |
| 6675 // Given that a concurrent operation might be adding regions to | |
| 6676 // the secondary free list we have to take the lock before | |
| 6677 // verifying it. | |
| 6678 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
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|
6679 _secondary_free_list.verify_list(); |
|
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|
6680 } |
| 2152 | 6681 |
| 6682 // If a concurrent region freeing operation is in progress it will | |
| 6683 // be difficult to correctly attributed any free regions we come | |
| 6684 // across to the correct free list given that they might belong to | |
| 6685 // one of several (free_list, secondary_free_list, any local lists, | |
| 6686 // etc.). So, if that's the case we will skip the rest of the | |
| 6687 // verification operation. Alternatively, waiting for the concurrent | |
| 6688 // operation to complete will have a non-trivial effect on the GC's | |
| 6689 // operation (no concurrent operation will last longer than the | |
| 6690 // interval between two calls to verification) and it might hide | |
| 6691 // any issues that we would like to catch during testing. | |
| 6692 if (free_regions_coming()) { | |
| 6693 return; | |
| 6694 } | |
| 6695 | |
| 2361 | 6696 // Make sure we append the secondary_free_list on the free_list so |
| 6697 // that all free regions we will come across can be safely | |
| 6698 // attributed to the free_list. | |
| 6699 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6700 |
| 6701 // Finally, make sure that the region accounting in the lists is | |
| 6702 // consistent with what we see in the heap. | |
| 6703 | |
| 4072 | 6704 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6705 heap_region_iterate(&cl); |
|
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|
6706 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
| 342 | 6707 } |
| 12080 | 6708 |
| 6709 // Optimized nmethod scanning | |
| 6710 | |
| 6711 class RegisterNMethodOopClosure: public OopClosure { | |
| 6712 G1CollectedHeap* _g1h; | |
| 6713 nmethod* _nm; | |
| 6714 | |
| 6715 template <class T> void do_oop_work(T* p) { | |
| 6716 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6717 if (!oopDesc::is_null(heap_oop)) { | |
| 6718 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6719 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
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|
6720 assert(!hr->continuesHumongous(), |
|
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|
6721 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
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|
6722 " starting at "HR_FORMAT, |
|
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|
6723 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
| 12080 | 6724 |
| 6725 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
| 6726 // entries but having duplicates is OK since we "mark" nmethods | |
| 6727 // as visited when we scan the strong code root lists during the GC. | |
| 6728 hr->add_strong_code_root(_nm); | |
|
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|
6729 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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|
6730 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
|
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|
6731 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6732 } |
| 6733 } | |
| 6734 | |
| 6735 public: | |
| 6736 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6737 _g1h(g1h), _nm(nm) {} | |
| 6738 | |
| 6739 void do_oop(oop* p) { do_oop_work(p); } | |
| 6740 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6741 }; | |
| 6742 | |
| 6743 class UnregisterNMethodOopClosure: public OopClosure { | |
| 6744 G1CollectedHeap* _g1h; | |
| 6745 nmethod* _nm; | |
| 6746 | |
| 6747 template <class T> void do_oop_work(T* p) { | |
| 6748 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6749 if (!oopDesc::is_null(heap_oop)) { | |
| 6750 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6751 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
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|
6752 assert(!hr->continuesHumongous(), |
|
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|
6753 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
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|
6754 " starting at "HR_FORMAT, |
|
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|
6755 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
|
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|
6756 |
| 12080 | 6757 hr->remove_strong_code_root(_nm); |
|
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|
6758 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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|
6759 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
|
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|
6760 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6761 } |
| 6762 } | |
| 6763 | |
| 6764 public: | |
| 6765 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6766 _g1h(g1h), _nm(nm) {} | |
| 6767 | |
| 6768 void do_oop(oop* p) { do_oop_work(p); } | |
| 6769 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6770 }; | |
| 6771 | |
| 6772 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
| 6773 CollectedHeap::register_nmethod(nm); | |
| 6774 | |
| 6775 guarantee(nm != NULL, "sanity"); | |
| 6776 RegisterNMethodOopClosure reg_cl(this, nm); | |
| 6777 nm->oops_do(®_cl); | |
| 6778 } | |
| 6779 | |
| 6780 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
| 6781 CollectedHeap::unregister_nmethod(nm); | |
| 6782 | |
| 6783 guarantee(nm != NULL, "sanity"); | |
| 6784 UnregisterNMethodOopClosure reg_cl(this, nm); | |
| 6785 nm->oops_do(®_cl, true); | |
| 6786 } | |
| 6787 | |
| 6788 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
| 6789 public: | |
| 6790 bool doHeapRegion(HeapRegion *hr) { | |
|
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|
6791 assert(!hr->isHumongous(), |
|
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|
6792 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
|
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|
6793 HR_FORMAT_PARAMS(hr))); |
| 12080 | 6794 hr->migrate_strong_code_roots(); |
| 6795 return false; | |
| 6796 } | |
| 6797 }; | |
| 6798 | |
| 6799 void G1CollectedHeap::migrate_strong_code_roots() { | |
| 6800 MigrateCodeRootsHeapRegionClosure cl; | |
| 6801 double migrate_start = os::elapsedTime(); | |
| 6802 collection_set_iterate(&cl); | |
| 6803 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
| 6804 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
| 6805 } | |
| 6806 | |
| 6807 // Mark all the code roots that point into regions *not* in the | |
| 6808 // collection set. | |
| 6809 // | |
| 6810 // Note we do not want to use a "marking" CodeBlobToOopClosure while | |
| 6811 // walking the the code roots lists of regions not in the collection | |
| 6812 // set. Suppose we have an nmethod (M) that points to objects in two | |
| 6813 // separate regions - one in the collection set (R1) and one not (R2). | |
| 6814 // Using a "marking" CodeBlobToOopClosure here would result in "marking" | |
| 6815 // nmethod M when walking the code roots for R1. When we come to scan | |
| 6816 // the code roots for R2, we would see that M is already marked and it | |
| 6817 // would be skipped and the objects in R2 that are referenced from M | |
| 6818 // would not be evacuated. | |
| 6819 | |
| 6820 class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { | |
| 6821 | |
| 6822 class MarkStrongCodeRootOopClosure: public OopClosure { | |
| 6823 ConcurrentMark* _cm; | |
| 6824 HeapRegion* _hr; | |
| 6825 uint _worker_id; | |
| 6826 | |
| 6827 template <class T> void do_oop_work(T* p) { | |
| 6828 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6829 if (!oopDesc::is_null(heap_oop)) { | |
| 6830 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6831 // Only mark objects in the region (which is assumed | |
| 6832 // to be not in the collection set). | |
| 6833 if (_hr->is_in(obj)) { | |
| 6834 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); | |
| 6835 } | |
| 6836 } | |
| 6837 } | |
| 6838 | |
| 6839 public: | |
| 6840 MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : | |
| 6841 _cm(cm), _hr(hr), _worker_id(worker_id) { | |
| 6842 assert(!_hr->in_collection_set(), "sanity"); | |
| 6843 } | |
| 6844 | |
| 6845 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6846 void do_oop(oop* p) { do_oop_work(p); } | |
| 6847 }; | |
| 6848 | |
| 6849 MarkStrongCodeRootOopClosure _oop_cl; | |
| 6850 | |
| 6851 public: | |
| 6852 MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): | |
| 6853 _oop_cl(cm, hr, worker_id) {} | |
| 6854 | |
| 6855 void do_code_blob(CodeBlob* cb) { | |
| 6856 nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); | |
| 6857 if (nm != NULL) { | |
| 6858 nm->oops_do(&_oop_cl); | |
| 6859 } | |
| 6860 } | |
| 6861 }; | |
| 6862 | |
| 6863 class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { | |
| 6864 G1CollectedHeap* _g1h; | |
| 6865 uint _worker_id; | |
| 6866 | |
| 6867 public: | |
| 6868 MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : | |
| 6869 _g1h(g1h), _worker_id(worker_id) {} | |
| 6870 | |
| 6871 bool doHeapRegion(HeapRegion *hr) { | |
| 6872 HeapRegionRemSet* hrrs = hr->rem_set(); | |
|
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6873 if (hr->continuesHumongous()) { |
|
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6874 // Code roots should never be attached to a continuation of a humongous region |
|
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6875 assert(hrrs->strong_code_roots_list_length() == 0, |
|
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6876 err_msg("code roots should never be attached to continuations of humongous region "HR_FORMAT |
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6877 " starting at "HR_FORMAT", but has "INT32_FORMAT, |
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6878 HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()), |
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6879 hrrs->strong_code_roots_list_length())); |
| 12080 | 6880 return false; |
| 6881 } | |
| 6882 | |
| 6883 if (hr->in_collection_set()) { | |
| 6884 // Don't mark code roots into regions in the collection set here. | |
| 6885 // They will be marked when we scan them. | |
| 6886 return false; | |
| 6887 } | |
| 6888 | |
| 6889 MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); | |
| 6890 hr->strong_code_roots_do(&cb_cl); | |
| 6891 return false; | |
| 6892 } | |
| 6893 }; | |
| 6894 | |
| 6895 void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { | |
| 6896 MarkStrongCodeRootsHRClosure cl(this, worker_id); | |
|
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6897 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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6898 heap_region_par_iterate_chunked(&cl, |
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6899 worker_id, |
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6900 workers()->active_workers(), |
|
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|
6901 HeapRegion::ParMarkRootClaimValue); |
|
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6902 } else { |
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6903 heap_region_iterate(&cl); |
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6904 } |
| 12080 | 6905 } |
| 6906 | |
| 6907 class RebuildStrongCodeRootClosure: public CodeBlobClosure { | |
| 6908 G1CollectedHeap* _g1h; | |
| 6909 | |
| 6910 public: | |
| 6911 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
| 6912 _g1h(g1h) {} | |
| 6913 | |
| 6914 void do_code_blob(CodeBlob* cb) { | |
| 6915 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
| 6916 if (nm == NULL) { | |
| 6917 return; | |
| 6918 } | |
| 6919 | |
| 6920 if (ScavengeRootsInCode && nm->detect_scavenge_root_oops()) { | |
| 6921 _g1h->register_nmethod(nm); | |
| 6922 } | |
| 6923 } | |
| 6924 }; | |
| 6925 | |
| 6926 void G1CollectedHeap::rebuild_strong_code_roots() { | |
| 6927 RebuildStrongCodeRootClosure blob_cl(this); | |
| 6928 CodeCache::blobs_do(&blob_cl); | |
| 6929 } |