Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 12116:1624a68007bd
Merge
| author | jmasa |
|---|---|
| date | Tue, 27 Aug 2013 18:55:33 -0700 |
| parents | 4c84d351cca9 f7d3b4387a16 |
| children | f175e3678be2 |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2013, 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/genOopClosures.inline.hpp" | |
| 54 #include "memory/generationSpec.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" | |
| 342 | 59 |
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60 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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61 |
| 342 | 62 // turn it on so that the contents of the young list (scan-only / |
| 63 // to-be-collected) are printed at "strategic" points before / during | |
| 64 // / after the collection --- this is useful for debugging | |
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65 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 66 // CURRENT STATUS |
| 67 // This file is under construction. Search for "FIXME". | |
| 68 | |
| 69 // INVARIANTS/NOTES | |
| 70 // | |
| 71 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 72 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 73 // and allocate_new_tlab, which are the "entry" points to the | |
| 74 // allocation code from the rest of the JVM. (Note that this does not | |
| 75 // apply to TLAB allocation, which is not part of this interface: it | |
| 76 // is done by clients of this interface.) | |
| 342 | 77 |
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78 // Notes on implementation of parallelism in different tasks. |
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79 // |
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80 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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81 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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82 // It does use run_task() which sets _n_workers in the task. |
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83 // G1ParTask executes g1_process_strong_roots() -> |
| 10405 | 84 // SharedHeap::process_strong_roots() which calls eventually to |
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85 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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86 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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87 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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88 // |
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89 |
| 342 | 90 // Local to this file. |
| 91 | |
| 92 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 93 SuspendibleThreadSet* _sts; | |
| 94 G1RemSet* _g1rs; | |
| 95 ConcurrentG1Refine* _cg1r; | |
| 96 bool _concurrent; | |
| 97 public: | |
| 98 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
| 99 G1RemSet* g1rs, | |
| 100 ConcurrentG1Refine* cg1r) : | |
| 101 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
| 102 {} | |
| 103 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
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104 bool oops_into_cset = _g1rs->refine_card(card_ptr, worker_i, false); |
| 1705 | 105 // This path is executed by the concurrent refine or mutator threads, |
| 106 // concurrently, and so we do not care if card_ptr contains references | |
| 107 // that point into the collection set. | |
| 108 assert(!oops_into_cset, "should be"); | |
| 109 | |
| 342 | 110 if (_concurrent && _sts->should_yield()) { |
| 111 // Caller will actually yield. | |
| 112 return false; | |
| 113 } | |
| 114 // Otherwise, we finished successfully; return true. | |
| 115 return true; | |
| 116 } | |
| 117 void set_concurrent(bool b) { _concurrent = b; } | |
| 118 }; | |
| 119 | |
| 120 | |
| 121 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 122 int _calls; | |
| 123 G1CollectedHeap* _g1h; | |
| 124 CardTableModRefBS* _ctbs; | |
| 125 int _histo[256]; | |
| 126 public: | |
| 127 ClearLoggedCardTableEntryClosure() : | |
| 128 _calls(0) | |
| 129 { | |
| 130 _g1h = G1CollectedHeap::heap(); | |
| 131 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
| 132 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 133 } | |
| 134 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 135 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 136 _calls++; | |
| 137 unsigned char* ujb = (unsigned char*)card_ptr; | |
| 138 int ind = (int)(*ujb); | |
| 139 _histo[ind]++; | |
| 140 *card_ptr = -1; | |
| 141 } | |
| 142 return true; | |
| 143 } | |
| 144 int calls() { return _calls; } | |
| 145 void print_histo() { | |
| 146 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 147 for (int i = 0; i < 256; i++) { | |
| 148 if (_histo[i] != 0) { | |
| 149 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 150 } | |
| 151 } | |
| 152 } | |
| 153 }; | |
| 154 | |
| 155 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 156 int _calls; | |
| 157 G1CollectedHeap* _g1h; | |
| 158 CardTableModRefBS* _ctbs; | |
| 159 public: | |
| 160 RedirtyLoggedCardTableEntryClosure() : | |
| 161 _calls(0) | |
| 162 { | |
| 163 _g1h = G1CollectedHeap::heap(); | |
| 164 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
| 165 } | |
| 166 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 167 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 168 _calls++; | |
| 169 *card_ptr = 0; | |
| 170 } | |
| 171 return true; | |
| 172 } | |
| 173 int calls() { return _calls; } | |
| 174 }; | |
| 175 | |
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176 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
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177 public: |
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178 bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
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179 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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180 return true; |
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181 } |
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182 }; |
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183 |
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184 YoungList::YoungList(G1CollectedHeap* g1h) : |
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185 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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186 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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187 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 188 } |
| 189 | |
| 190 void YoungList::push_region(HeapRegion *hr) { | |
| 191 assert(!hr->is_young(), "should not already be young"); | |
| 192 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 193 | |
| 194 hr->set_next_young_region(_head); | |
| 195 _head = hr; | |
| 196 | |
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197 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 198 ++_length; |
| 199 } | |
| 200 | |
| 201 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 202 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 203 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 204 | |
| 205 hr->set_next_young_region(_survivor_head); | |
| 206 if (_survivor_head == NULL) { | |
| 545 | 207 _survivor_tail = hr; |
| 342 | 208 } |
| 209 _survivor_head = hr; | |
| 210 ++_survivor_length; | |
| 211 } | |
| 212 | |
| 213 void YoungList::empty_list(HeapRegion* list) { | |
| 214 while (list != NULL) { | |
| 215 HeapRegion* next = list->get_next_young_region(); | |
| 216 list->set_next_young_region(NULL); | |
| 217 list->uninstall_surv_rate_group(); | |
| 218 list->set_not_young(); | |
| 219 list = next; | |
| 220 } | |
| 221 } | |
| 222 | |
| 223 void YoungList::empty_list() { | |
| 224 assert(check_list_well_formed(), "young list should be well formed"); | |
| 225 | |
| 226 empty_list(_head); | |
| 227 _head = NULL; | |
| 228 _length = 0; | |
| 229 | |
| 230 empty_list(_survivor_head); | |
| 231 _survivor_head = NULL; | |
| 545 | 232 _survivor_tail = NULL; |
| 342 | 233 _survivor_length = 0; |
| 234 | |
| 235 _last_sampled_rs_lengths = 0; | |
| 236 | |
| 237 assert(check_list_empty(false), "just making sure..."); | |
| 238 } | |
| 239 | |
| 240 bool YoungList::check_list_well_formed() { | |
| 241 bool ret = true; | |
| 242 | |
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243 uint length = 0; |
| 342 | 244 HeapRegion* curr = _head; |
| 245 HeapRegion* last = NULL; | |
| 246 while (curr != NULL) { | |
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247 if (!curr->is_young()) { |
| 342 | 248 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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249 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 250 curr->bottom(), curr->end(), |
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251 curr->is_young(), curr->is_survivor()); |
| 342 | 252 ret = false; |
| 253 } | |
| 254 ++length; | |
| 255 last = curr; | |
| 256 curr = curr->get_next_young_region(); | |
| 257 } | |
| 258 ret = ret && (length == _length); | |
| 259 | |
| 260 if (!ret) { | |
| 261 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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262 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
| 342 | 263 length, _length); |
| 264 } | |
| 265 | |
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266 return ret; |
| 342 | 267 } |
| 268 | |
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269 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 270 bool ret = true; |
| 271 | |
| 272 if (_length != 0) { | |
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273 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
| 342 | 274 _length); |
| 275 ret = false; | |
| 276 } | |
| 277 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 278 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 279 ret = false; | |
| 280 } | |
| 281 if (_head != NULL) { | |
| 282 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 283 ret = false; | |
| 284 } | |
| 285 if (!ret) { | |
| 286 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 287 } | |
| 288 | |
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289 return ret; |
| 342 | 290 } |
| 291 | |
| 292 void | |
| 293 YoungList::rs_length_sampling_init() { | |
| 294 _sampled_rs_lengths = 0; | |
| 295 _curr = _head; | |
| 296 } | |
| 297 | |
| 298 bool | |
| 299 YoungList::rs_length_sampling_more() { | |
| 300 return _curr != NULL; | |
| 301 } | |
| 302 | |
| 303 void | |
| 304 YoungList::rs_length_sampling_next() { | |
| 305 assert( _curr != NULL, "invariant" ); | |
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306 size_t rs_length = _curr->rem_set()->occupied(); |
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307 |
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308 _sampled_rs_lengths += rs_length; |
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309 |
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310 // The current region may not yet have been added to the |
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311 // incremental collection set (it gets added when it is |
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312 // retired as the current allocation region). |
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313 if (_curr->in_collection_set()) { |
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314 // Update the collection set policy information for this region |
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315 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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316 } |
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317 |
| 342 | 318 _curr = _curr->get_next_young_region(); |
| 319 if (_curr == NULL) { | |
| 320 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 321 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 322 } | |
| 323 } | |
| 324 | |
| 325 void | |
| 326 YoungList::reset_auxilary_lists() { | |
| 327 guarantee( is_empty(), "young list should be empty" ); | |
| 328 assert(check_list_well_formed(), "young list should be well formed"); | |
| 329 | |
| 330 // Add survivor regions to SurvRateGroup. | |
| 331 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 332 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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333 |
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334 int young_index_in_cset = 0; |
| 342 | 335 for (HeapRegion* curr = _survivor_head; |
| 336 curr != NULL; | |
| 337 curr = curr->get_next_young_region()) { | |
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338 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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339 |
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340 // The region is a non-empty survivor so let's add it to |
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341 // the incremental collection set for the next evacuation |
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342 // pause. |
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343 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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344 young_index_in_cset += 1; |
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345 } |
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346 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
| 342 | 347 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 348 | |
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349 _head = _survivor_head; |
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350 _length = _survivor_length; |
| 342 | 351 if (_survivor_head != NULL) { |
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352 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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353 assert(_survivor_length > 0, "invariant"); |
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354 _survivor_tail->set_next_young_region(NULL); |
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355 } |
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356 |
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357 // Don't clear the survivor list handles until the start of |
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358 // the next evacuation pause - we need it in order to re-tag |
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359 // the survivor regions from this evacuation pause as 'young' |
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360 // at the start of the next. |
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361 |
| 545 | 362 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 363 |
| 364 assert(check_list_well_formed(), "young list should be well formed"); | |
| 365 } | |
| 366 | |
| 367 void YoungList::print() { | |
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368 HeapRegion* lists[] = {_head, _survivor_head}; |
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369 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 370 |
| 371 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 372 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 373 HeapRegion *curr = lists[list]; | |
| 374 if (curr == NULL) | |
| 375 gclog_or_tty->print_cr(" empty"); | |
| 376 while (curr != NULL) { | |
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377 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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378 HR_FORMAT_PARAMS(curr), |
| 342 | 379 curr->prev_top_at_mark_start(), |
| 380 curr->next_top_at_mark_start(), | |
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381 curr->age_in_surv_rate_group_cond()); |
| 342 | 382 curr = curr->get_next_young_region(); |
| 383 } | |
| 384 } | |
| 385 | |
| 386 gclog_or_tty->print_cr(""); | |
| 387 } | |
| 388 | |
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389 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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390 { |
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391 // Claim the right to put the region on the dirty cards region list |
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392 // by installing a self pointer. |
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393 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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394 if (next == NULL) { |
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395 HeapRegion* res = (HeapRegion*) |
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396 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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397 NULL); |
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398 if (res == NULL) { |
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399 HeapRegion* head; |
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400 do { |
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401 // Put the region to the dirty cards region list. |
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402 head = _dirty_cards_region_list; |
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403 next = (HeapRegion*) |
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404 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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405 if (next == head) { |
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406 assert(hr->get_next_dirty_cards_region() == hr, |
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407 "hr->get_next_dirty_cards_region() != hr"); |
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408 if (next == NULL) { |
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409 // The last region in the list points to itself. |
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410 hr->set_next_dirty_cards_region(hr); |
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411 } else { |
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412 hr->set_next_dirty_cards_region(next); |
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413 } |
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414 } |
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415 } while (next != head); |
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416 } |
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417 } |
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418 } |
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419 |
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420 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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421 { |
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422 HeapRegion* head; |
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423 HeapRegion* hr; |
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424 do { |
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425 head = _dirty_cards_region_list; |
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426 if (head == NULL) { |
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427 return NULL; |
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428 } |
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429 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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430 if (head == new_head) { |
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431 // The last region. |
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432 new_head = NULL; |
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433 } |
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434 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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435 head); |
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436 } while (hr != head); |
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437 assert(hr != NULL, "invariant"); |
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438 hr->set_next_dirty_cards_region(NULL); |
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439 return hr; |
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440 } |
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441 |
| 342 | 442 void G1CollectedHeap::stop_conc_gc_threads() { |
| 794 | 443 _cg1r->stop(); |
| 342 | 444 _cmThread->stop(); |
| 445 } | |
| 446 | |
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447 #ifdef ASSERT |
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448 // A region is added to the collection set as it is retired |
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449 // so an address p can point to a region which will be in the |
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450 // collection set but has not yet been retired. This method |
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451 // therefore is only accurate during a GC pause after all |
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452 // regions have been retired. It is used for debugging |
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453 // to check if an nmethod has references to objects that can |
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454 // be move during a partial collection. Though it can be |
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455 // inaccurate, it is sufficient for G1 because the conservative |
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456 // implementation of is_scavengable() for G1 will indicate that |
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457 // all nmethods must be scanned during a partial collection. |
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458 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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459 HeapRegion* hr = heap_region_containing(p); |
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460 return hr != NULL && hr->in_collection_set(); |
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461 } |
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462 #endif |
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463 |
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464 // Returns true if the reference points to an object that |
| 10405 | 465 // can move in an incremental collection. |
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466 bool G1CollectedHeap::is_scavengable(const void* p) { |
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467 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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468 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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469 HeapRegion* hr = heap_region_containing(p); |
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470 if (hr == NULL) { |
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471 // null |
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472 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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473 return false; |
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474 } else { |
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475 return !hr->isHumongous(); |
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476 } |
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477 } |
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478 |
| 342 | 479 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 480 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 481 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); | |
| 482 | |
| 483 // Count the dirty cards at the start. | |
| 484 CountNonCleanMemRegionClosure count1(this); | |
| 485 ct_bs->mod_card_iterate(&count1); | |
| 486 int orig_count = count1.n(); | |
| 487 | |
| 488 // First clear the logged cards. | |
| 489 ClearLoggedCardTableEntryClosure clear; | |
| 490 dcqs.set_closure(&clear); | |
| 491 dcqs.apply_closure_to_all_completed_buffers(); | |
| 492 dcqs.iterate_closure_all_threads(false); | |
| 493 clear.print_histo(); | |
| 494 | |
| 495 // Now ensure that there's no dirty cards. | |
| 496 CountNonCleanMemRegionClosure count2(this); | |
| 497 ct_bs->mod_card_iterate(&count2); | |
| 498 if (count2.n() != 0) { | |
| 499 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 500 count2.n(), orig_count); | |
| 501 } | |
| 502 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 503 | |
| 504 RedirtyLoggedCardTableEntryClosure redirty; | |
| 505 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
| 506 dcqs.apply_closure_to_all_completed_buffers(); | |
| 507 dcqs.iterate_closure_all_threads(false); | |
| 508 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
| 509 clear.calls(), orig_count); | |
| 510 guarantee(redirty.calls() == clear.calls(), | |
| 511 "Or else mechanism is broken."); | |
| 512 | |
| 513 CountNonCleanMemRegionClosure count3(this); | |
| 514 ct_bs->mod_card_iterate(&count3); | |
| 515 if (count3.n() != orig_count) { | |
| 516 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 517 orig_count, count3.n()); | |
| 518 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 519 } | |
| 520 | |
| 521 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 522 } | |
| 523 | |
| 524 // Private class members. | |
| 525 | |
| 526 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 527 | |
| 528 // Private methods. | |
| 529 | |
| 2152 | 530 HeapRegion* |
| 2361 | 531 G1CollectedHeap::new_region_try_secondary_free_list() { |
| 2152 | 532 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 533 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 534 if (!_secondary_free_list.is_empty()) { | |
| 535 if (G1ConcRegionFreeingVerbose) { | |
| 536 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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537 "secondary_free_list has %u entries", |
| 2152 | 538 _secondary_free_list.length()); |
| 539 } | |
| 540 // It looks as if there are free regions available on the | |
| 541 // secondary_free_list. Let's move them to the free_list and try | |
| 542 // again to allocate from it. | |
| 543 append_secondary_free_list(); | |
| 544 | |
| 545 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
| 546 "empty we should have moved at least one entry to the free_list"); | |
| 547 HeapRegion* res = _free_list.remove_head(); | |
| 548 if (G1ConcRegionFreeingVerbose) { | |
| 549 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 550 "allocated "HR_FORMAT" from secondary_free_list", | |
| 551 HR_FORMAT_PARAMS(res)); | |
| 552 } | |
| 553 return res; | |
| 554 } | |
| 555 | |
| 10405 | 556 // Wait here until we get notified either when (a) there are no |
| 2152 | 557 // more free regions coming or (b) some regions have been moved on |
| 558 // the secondary_free_list. | |
| 559 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 560 } | |
| 561 | |
| 562 if (G1ConcRegionFreeingVerbose) { | |
| 563 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 564 "could not allocate from secondary_free_list"); | |
| 565 } | |
| 566 return NULL; | |
| 567 } | |
| 568 | |
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569 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool do_expand) { |
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570 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 571 "the only time we use this to allocate a humongous region is " |
| 572 "when we are allocating a single humongous region"); | |
| 573 | |
| 574 HeapRegion* res; | |
| 575 if (G1StressConcRegionFreeing) { | |
| 576 if (!_secondary_free_list.is_empty()) { | |
| 577 if (G1ConcRegionFreeingVerbose) { | |
| 578 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 579 "forced to look at the secondary_free_list"); | |
| 580 } | |
| 2361 | 581 res = new_region_try_secondary_free_list(); |
| 2152 | 582 if (res != NULL) { |
| 583 return res; | |
| 584 } | |
| 585 } | |
| 586 } | |
| 587 res = _free_list.remove_head_or_null(); | |
| 588 if (res == NULL) { | |
| 589 if (G1ConcRegionFreeingVerbose) { | |
| 590 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 591 "res == NULL, trying the secondary_free_list"); | |
| 592 } | |
| 2361 | 593 res = new_region_try_secondary_free_list(); |
| 2152 | 594 } |
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595 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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596 // Currently, only attempts to allocate GC alloc regions set |
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597 // do_expand to true. So, we should only reach here during a |
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598 // safepoint. If this assumption changes we might have to |
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599 // reconsider the use of _expand_heap_after_alloc_failure. |
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600 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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601 |
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602 ergo_verbose1(ErgoHeapSizing, |
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603 "attempt heap expansion", |
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604 ergo_format_reason("region allocation request failed") |
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605 ergo_format_byte("allocation request"), |
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606 word_size * HeapWordSize); |
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607 if (expand(word_size * HeapWordSize)) { |
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608 // Given that expand() succeeded in expanding the heap, and we |
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609 // always expand the heap by an amount aligned to the heap |
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610 // region size, the free list should in theory not be empty. So |
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611 // it would probably be OK to use remove_head(). But the extra |
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612 // check for NULL is unlikely to be a performance issue here (we |
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613 // just expanded the heap!) so let's just be conservative and |
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614 // use remove_head_or_null(). |
| 3766 | 615 res = _free_list.remove_head_or_null(); |
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616 } else { |
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617 _expand_heap_after_alloc_failure = false; |
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618 } |
| 342 | 619 } |
| 620 return res; | |
| 621 } | |
| 622 | |
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623 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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624 size_t word_size) { |
| 2361 | 625 assert(isHumongous(word_size), "word_size should be humongous"); |
| 626 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 627 | |
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628 uint first = G1_NULL_HRS_INDEX; |
| 2152 | 629 if (num_regions == 1) { |
| 630 // Only one region to allocate, no need to go through the slower | |
| 10405 | 631 // path. The caller will attempt the expansion if this fails, so |
| 2152 | 632 // let's not try to expand here too. |
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633 HeapRegion* hr = new_region(word_size, false /* do_expand */); |
| 2152 | 634 if (hr != NULL) { |
| 635 first = hr->hrs_index(); | |
| 636 } else { | |
| 3766 | 637 first = G1_NULL_HRS_INDEX; |
| 2152 | 638 } |
| 639 } else { | |
| 640 // We can't allocate humongous regions while cleanupComplete() is | |
| 641 // running, since some of the regions we find to be empty might not | |
| 642 // yet be added to the free list and it is not straightforward to | |
| 643 // know which list they are on so that we can remove them. Note | |
| 644 // that we only need to do this if we need to allocate more than | |
| 645 // one region to satisfy the current humongous allocation | |
| 646 // request. If we are only allocating one region we use the common | |
| 647 // region allocation code (see above). | |
| 648 wait_while_free_regions_coming(); | |
| 2361 | 649 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 650 |
| 651 if (free_regions() >= num_regions) { | |
| 3766 | 652 first = _hrs.find_contiguous(num_regions); |
| 653 if (first != G1_NULL_HRS_INDEX) { | |
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654 for (uint i = first; i < first + num_regions; ++i) { |
| 3766 | 655 HeapRegion* hr = region_at(i); |
| 2152 | 656 assert(hr->is_empty(), "sanity"); |
| 2361 | 657 assert(is_on_master_free_list(hr), "sanity"); |
| 2152 | 658 hr->set_pending_removal(true); |
| 659 } | |
| 660 _free_list.remove_all_pending(num_regions); | |
| 661 } | |
| 662 } | |
| 663 } | |
| 664 return first; | |
| 665 } | |
| 666 | |
| 2361 | 667 HeapWord* |
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668 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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669 uint num_regions, |
| 2361 | 670 size_t word_size) { |
| 3766 | 671 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
| 2361 | 672 assert(isHumongous(word_size), "word_size should be humongous"); |
| 673 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 674 | |
| 675 // Index of last region in the series + 1. | |
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676 uint last = first + num_regions; |
| 2361 | 677 |
| 678 // We need to initialize the region(s) we just discovered. This is | |
| 679 // a bit tricky given that it can happen concurrently with | |
| 680 // refinement threads refining cards on these regions and | |
| 681 // potentially wanting to refine the BOT as they are scanning | |
| 682 // those cards (this can happen shortly after a cleanup; see CR | |
| 683 // 6991377). So we have to set up the region(s) carefully and in | |
| 684 // a specific order. | |
| 685 | |
| 686 // The word size sum of all the regions we will allocate. | |
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687 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 688 assert(word_size <= word_size_sum, "sanity"); |
| 689 | |
| 690 // This will be the "starts humongous" region. | |
| 3766 | 691 HeapRegion* first_hr = region_at(first); |
| 2361 | 692 // The header of the new object will be placed at the bottom of |
| 693 // the first region. | |
| 694 HeapWord* new_obj = first_hr->bottom(); | |
| 695 // This will be the new end of the first region in the series that | |
| 10405 | 696 // should also match the end of the last region in the series. |
| 2361 | 697 HeapWord* new_end = new_obj + word_size_sum; |
| 698 // This will be the new top of the first region that will reflect | |
| 699 // this allocation. | |
| 700 HeapWord* new_top = new_obj + word_size; | |
| 701 | |
| 702 // First, we need to zero the header of the space that we will be | |
| 703 // allocating. When we update top further down, some refinement | |
| 704 // threads might try to scan the region. By zeroing the header we | |
| 705 // ensure that any thread that will try to scan the region will | |
| 706 // come across the zero klass word and bail out. | |
| 707 // | |
| 708 // NOTE: It would not have been correct to have used | |
| 709 // CollectedHeap::fill_with_object() and make the space look like | |
| 710 // an int array. The thread that is doing the allocation will | |
| 711 // later update the object header to a potentially different array | |
| 712 // type and, for a very short period of time, the klass and length | |
| 713 // fields will be inconsistent. This could cause a refinement | |
| 714 // thread to calculate the object size incorrectly. | |
| 715 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 716 | |
| 717 // We will set up the first region as "starts humongous". This | |
| 718 // will also update the BOT covering all the regions to reflect | |
| 719 // that there is a single object that starts at the bottom of the | |
| 720 // first region. | |
| 721 first_hr->set_startsHumongous(new_top, new_end); | |
| 722 | |
| 723 // Then, if there are any, we will set up the "continues | |
| 724 // humongous" regions. | |
| 725 HeapRegion* hr = NULL; | |
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726 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 727 hr = region_at(i); |
| 2361 | 728 hr->set_continuesHumongous(first_hr); |
| 729 } | |
| 730 // If we have "continues humongous" regions (hr != NULL), then the | |
| 731 // end of the last one should match new_end. | |
| 732 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 733 | |
| 734 // Up to this point no concurrent thread would have been able to | |
| 735 // do any scanning on any region in this series. All the top | |
| 736 // fields still point to bottom, so the intersection between | |
| 737 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 738 // update the top fields, we'll do a storestore to make sure that | |
| 739 // no thread sees the update to top before the zeroing of the | |
| 740 // object header and the BOT initialization. | |
| 741 OrderAccess::storestore(); | |
| 742 | |
| 743 // Now that the BOT and the object header have been initialized, | |
| 744 // we can update top of the "starts humongous" region. | |
| 745 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 746 "new_top should be in this region"); | |
| 747 first_hr->set_top(new_top); | |
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748 if (_hr_printer.is_active()) { |
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749 HeapWord* bottom = first_hr->bottom(); |
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750 HeapWord* end = first_hr->orig_end(); |
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751 if ((first + 1) == last) { |
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752 // the series has a single humongous region |
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753 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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754 } else { |
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755 // the series has more than one humongous regions |
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756 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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757 } |
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758 } |
| 2361 | 759 |
| 760 // Now, we will update the top fields of the "continues humongous" | |
| 761 // regions. The reason we need to do this is that, otherwise, | |
| 762 // these regions would look empty and this will confuse parts of | |
| 763 // G1. For example, the code that looks for a consecutive number | |
| 764 // of empty regions will consider them empty and try to | |
| 765 // re-allocate them. We can extend is_empty() to also include | |
| 766 // !continuesHumongous(), but it is easier to just update the top | |
| 767 // fields here. The way we set top for all regions (i.e., top == | |
| 768 // end for all regions but the last one, top == new_top for the | |
| 769 // last one) is actually used when we will free up the humongous | |
| 770 // region in free_humongous_region(). | |
| 771 hr = NULL; | |
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772 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 773 hr = region_at(i); |
| 2361 | 774 if ((i + 1) == last) { |
| 775 // last continues humongous region | |
| 776 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 777 "new_top should fall on this region"); | |
| 778 hr->set_top(new_top); | |
|
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779 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 780 } else { |
| 781 // not last one | |
| 782 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 783 hr->set_top(hr->end()); | |
|
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784 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 785 } |
| 786 } | |
| 787 // If we have continues humongous regions (hr != NULL), then the | |
| 788 // end of the last one should match new_end and its top should | |
| 789 // match new_top. | |
| 790 assert(hr == NULL || | |
| 791 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
| 792 | |
| 793 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 794 _summary_bytes_used += first_hr->used(); | |
| 795 _humongous_set.add(first_hr); | |
| 796 | |
| 797 return new_obj; | |
| 798 } | |
| 799 | |
| 342 | 800 // If could fit into free regions w/o expansion, try. |
| 801 // Otherwise, if can expand, do so. | |
| 802 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 803 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 804 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 805 | |
| 806 verify_region_sets_optional(); | |
| 342 | 807 |
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808 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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809 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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810 uint x_num = expansion_regions(); |
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811 uint fs = _hrs.free_suffix(); |
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812 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
| 3766 | 813 if (first == G1_NULL_HRS_INDEX) { |
| 2152 | 814 // The only thing we can do now is attempt expansion. |
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815 if (fs + x_num >= num_regions) { |
|
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816 // If the number of regions we're trying to allocate for this |
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817 // object is at most the number of regions in the free suffix, |
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818 // then the call to humongous_obj_allocate_find_first() above |
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819 // should have succeeded and we wouldn't be here. |
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820 // |
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821 // We should only be trying to expand when the free suffix is |
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822 // not sufficient for the object _and_ we have some expansion |
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823 // room available. |
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824 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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825 |
|
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826 ergo_verbose1(ErgoHeapSizing, |
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827 "attempt heap expansion", |
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828 ergo_format_reason("humongous allocation request failed") |
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829 ergo_format_byte("allocation request"), |
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830 word_size * HeapWordSize); |
|
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831 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
| 3766 | 832 // Even though the heap was expanded, it might not have |
| 833 // reached the desired size. So, we cannot assume that the | |
| 834 // allocation will succeed. | |
|
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835 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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836 } |
| 2152 | 837 } |
| 838 } | |
| 839 | |
| 2361 | 840 HeapWord* result = NULL; |
| 3766 | 841 if (first != G1_NULL_HRS_INDEX) { |
| 2361 | 842 result = |
| 843 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
| 844 assert(result != NULL, "it should always return a valid result"); | |
|
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845 |
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846 // A successful humongous object allocation changes the used space |
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847 // information of the old generation so we need to recalculate the |
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848 // sizes and update the jstat counters here. |
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|
849 g1mm()->update_sizes(); |
| 2152 | 850 } |
| 851 | |
| 852 verify_region_sets_optional(); | |
| 2361 | 853 |
| 854 return result; | |
| 342 | 855 } |
| 856 | |
| 1973 | 857 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 858 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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859 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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860 |
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861 unsigned int dummy_gc_count_before; |
|
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862 int dummy_gclocker_retry_count = 0; |
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863 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
| 342 | 864 } |
| 865 | |
| 866 HeapWord* | |
| 867 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 868 bool* gc_overhead_limit_was_exceeded) { |
| 869 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 870 |
| 10405 | 871 // Loop until the allocation is satisfied, or unsatisfied after GC. |
|
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872 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
| 1973 | 873 unsigned int gc_count_before; |
|
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874 |
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875 HeapWord* result = NULL; |
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876 if (!isHumongous(word_size)) { |
|
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877 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
|
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878 } else { |
|
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879 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
|
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880 } |
|
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881 if (result != NULL) { |
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|
882 return result; |
| 342 | 883 } |
| 884 | |
| 885 // Create the garbage collection operation... | |
| 1973 | 886 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 887 // ...and get the VM thread to execute it. |
| 888 VMThread::execute(&op); | |
| 1973 | 889 |
| 890 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 891 // If the operation was successful we'll return the result even | |
| 892 // if it is NULL. If the allocation attempt failed immediately | |
| 893 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 894 HeapWord* result = op.result(); | |
| 895 if (result != NULL && !isHumongous(word_size)) { | |
| 896 // Allocations that take place on VM operations do not do any | |
| 897 // card dirtying and we have to do it here. We only have to do | |
| 898 // this for non-humongous allocations, though. | |
| 899 dirty_young_block(result, word_size); | |
| 900 } | |
| 342 | 901 return result; |
| 1973 | 902 } else { |
|
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903 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
|
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904 return NULL; |
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|
905 } |
| 1973 | 906 assert(op.result() == NULL, |
| 907 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 908 } |
| 909 | |
| 910 // Give a warning if we seem to be looping forever. | |
| 911 if ((QueuedAllocationWarningCount > 0) && | |
| 912 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 913 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 914 } |
| 915 } | |
| 1973 | 916 |
| 917 ShouldNotReachHere(); | |
|
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918 return NULL; |
| 342 | 919 } |
| 920 | |
|
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|
921 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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922 unsigned int *gc_count_before_ret, |
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923 int* gclocker_retry_count_ret) { |
|
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|
924 // Make sure you read the note in attempt_allocation_humongous(). |
|
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|
925 |
|
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|
926 assert_heap_not_locked_and_not_at_safepoint(); |
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927 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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928 "be called for humongous allocation requests"); |
|
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|
929 |
|
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930 // We should only get here after the first-level allocation attempt |
|
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931 // (attempt_allocation()) failed to allocate. |
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|
932 |
|
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933 // We will loop until a) we manage to successfully perform the |
|
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934 // allocation or b) we successfully schedule a collection which |
|
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|
935 // fails to perform the allocation. b) is the only case when we'll |
|
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|
936 // return NULL. |
|
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|
937 HeapWord* result = NULL; |
|
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938 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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939 bool should_try_gc; |
|
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|
940 unsigned int gc_count_before; |
|
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941 |
|
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942 { |
|
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|
943 MutexLockerEx x(Heap_lock); |
|
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944 |
|
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|
945 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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|
946 false /* bot_updates */); |
|
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|
947 if (result != NULL) { |
|
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|
948 return result; |
|
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|
949 } |
|
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|
950 |
|
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|
951 // If we reach here, attempt_allocation_locked() above failed to |
|
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|
952 // allocate a new region. So the mutator alloc region should be NULL. |
|
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|
953 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
|
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|
954 |
|
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|
955 if (GC_locker::is_active_and_needs_gc()) { |
|
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956 if (g1_policy()->can_expand_young_list()) { |
|
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|
957 // No need for an ergo verbose message here, |
|
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|
958 // can_expand_young_list() does this when it returns true. |
|
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|
959 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
|
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960 false /* bot_updates */); |
|
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|
961 if (result != NULL) { |
|
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|
962 return result; |
|
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|
963 } |
|
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|
964 } |
|
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|
965 should_try_gc = false; |
|
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966 } else { |
|
6106
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967 // The GCLocker may not be active but the GCLocker initiated |
|
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968 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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969 // returns true). In this case we do not try this GC and |
|
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970 // wait until the GCLocker initiated GC is performed, and |
|
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971 // then retry the allocation. |
|
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972 if (GC_locker::needs_gc()) { |
|
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973 should_try_gc = false; |
|
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974 } else { |
|
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975 // Read the GC count while still holding the Heap_lock. |
|
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976 gc_count_before = total_collections(); |
|
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977 should_try_gc = true; |
|
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978 } |
|
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979 } |
|
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980 } |
|
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981 |
|
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982 if (should_try_gc) { |
|
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983 bool succeeded; |
|
12113
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|
984 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
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985 GCCause::_g1_inc_collection_pause); |
|
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986 if (result != NULL) { |
|
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|
987 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
988 return result; |
|
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|
989 } |
|
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|
990 |
|
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|
991 if (succeeded) { |
|
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|
992 // If we get here we successfully scheduled a collection which |
|
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993 // failed to allocate. No point in trying to allocate |
|
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|
994 // further. We'll just return NULL. |
|
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|
995 MutexLockerEx x(Heap_lock); |
|
4910
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|
996 *gc_count_before_ret = total_collections(); |
|
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|
997 return NULL; |
|
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|
998 } |
|
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|
999 } else { |
|
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|
1000 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
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|
1001 MutexLockerEx x(Heap_lock); |
|
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|
1002 *gc_count_before_ret = total_collections(); |
|
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1003 return NULL; |
|
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1004 } |
|
6106
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|
1005 // The GCLocker is either active or the GCLocker initiated |
|
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1006 // GC has not yet been performed. Stall until it is and |
|
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1007 // then retry the allocation. |
|
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1008 GC_locker::stall_until_clear(); |
|
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|
1009 (*gclocker_retry_count_ret) += 1; |
|
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1010 } |
|
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|
1011 |
| 10405 | 1012 // We can reach here if we were unsuccessful in scheduling a |
|
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1013 // collection (because another thread beat us to it) or if we were |
|
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1014 // stalled due to the GC locker. In either can we should retry the |
|
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1015 // allocation attempt in case another thread successfully |
|
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|
1016 // performed a collection and reclaimed enough space. We do the |
|
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1017 // first attempt (without holding the Heap_lock) here and the |
|
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|
1018 // follow-on attempt will be at the start of the next loop |
|
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1019 // iteration (after taking the Heap_lock). |
|
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1020 result = _mutator_alloc_region.attempt_allocation(word_size, |
|
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|
1021 false /* bot_updates */); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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4912
diff
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|
1022 if (result != NULL) { |
|
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|
1023 return result; |
|
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|
1024 } |
|
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|
1025 |
|
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|
1026 // Give a warning if we seem to be looping forever. |
|
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|
1027 if ((QueuedAllocationWarningCount > 0) && |
|
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|
1028 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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|
1029 warning("G1CollectedHeap::attempt_allocation_slow() " |
|
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|
1030 "retries %d times", try_count); |
|
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|
1031 } |
|
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|
1032 } |
|
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|
1033 |
|
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|
1034 ShouldNotReachHere(); |
|
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|
1035 return NULL; |
|
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diff
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|
1036 } |
|
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|
1037 |
|
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|
1038 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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|
1039 unsigned int * gc_count_before_ret, |
|
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|
1040 int* gclocker_retry_count_ret) { |
|
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|
1041 // The structure of this method has a lot of similarities to |
|
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|
1042 // attempt_allocation_slow(). The reason these two were not merged |
|
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|
1043 // into a single one is that such a method would require several "if |
|
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|
1044 // allocation is not humongous do this, otherwise do that" |
|
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|
1045 // conditional paths which would obscure its flow. In fact, an early |
|
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|
1046 // version of this code did use a unified method which was harder to |
|
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|
1047 // follow and, as a result, it had subtle bugs that were hard to |
|
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|
1048 // track down. So keeping these two methods separate allows each to |
|
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|
1049 // be more readable. It will be good to keep these two in sync as |
|
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|
1050 // much as possible. |
|
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|
1051 |
|
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|
1052 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
1053 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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|
1054 "should only be called for humongous allocations"); |
|
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|
1055 |
|
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1056 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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diff
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|
1057 // need to start a marking cycle at each humongous object allocation. We do |
|
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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diff
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|
1058 // the check before we do the actual allocation. The reason for doing it |
|
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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parents:
4833
diff
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|
1059 // before the allocation is that we avoid having to keep track of the newly |
|
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1060 // allocated memory while we do a GC. |
|
4910
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|
1061 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
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diff
changeset
|
1062 word_size)) { |
|
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1063 collect(GCCause::_g1_humongous_allocation); |
|
6a78aa6ac1ff
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|
1064 } |
|
6a78aa6ac1ff
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diff
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|
1065 |
|
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|
1066 // We will loop until a) we manage to successfully perform the |
|
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|
1067 // allocation or b) we successfully schedule a collection which |
|
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|
1068 // fails to perform the allocation. b) is the only case when we'll |
|
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diff
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|
1069 // return NULL. |
|
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changeset
|
1070 HeapWord* result = NULL; |
|
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|
1071 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
1072 bool should_try_gc; |
|
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|
1073 unsigned int gc_count_before; |
|
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|
1074 |
|
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|
1075 { |
|
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1076 MutexLockerEx x(Heap_lock); |
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1077 |
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1078 // Given that humongous objects are not allocated in young |
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1079 // regions, we'll first try to do the allocation without doing a |
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1080 // collection hoping that there's enough space in the heap. |
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1081 result = humongous_obj_allocate(word_size); |
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1082 if (result != NULL) { |
|
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1083 return result; |
|
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1084 } |
|
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1085 |
|
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1086 if (GC_locker::is_active_and_needs_gc()) { |
|
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1087 should_try_gc = false; |
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1088 } else { |
|
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1089 // The GCLocker may not be active but the GCLocker initiated |
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1090 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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1091 // returns true). In this case we do not try this GC and |
|
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1092 // wait until the GCLocker initiated GC is performed, and |
|
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1093 // then retry the allocation. |
|
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1094 if (GC_locker::needs_gc()) { |
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1095 should_try_gc = false; |
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1096 } else { |
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1097 // Read the GC count while still holding the Heap_lock. |
|
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1098 gc_count_before = total_collections(); |
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1099 should_try_gc = true; |
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1100 } |
|
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1101 } |
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1102 } |
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1103 |
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1104 if (should_try_gc) { |
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1105 // If we failed to allocate the humongous object, we should try to |
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1106 // do a collection pause (if we're allowed) in case it reclaims |
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1107 // enough space for the allocation to succeed after the pause. |
|
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1108 |
|
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1109 bool succeeded; |
|
12113
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1110 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
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1111 GCCause::_g1_humongous_allocation); |
|
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1112 if (result != NULL) { |
|
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1113 assert(succeeded, "only way to get back a non-NULL result"); |
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1114 return result; |
|
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1115 } |
|
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1116 |
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1117 if (succeeded) { |
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1118 // If we get here we successfully scheduled a collection which |
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1119 // failed to allocate. No point in trying to allocate |
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1120 // further. We'll just return NULL. |
|
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1121 MutexLockerEx x(Heap_lock); |
|
4910
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1122 *gc_count_before_ret = total_collections(); |
|
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1123 return NULL; |
|
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1124 } |
|
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1125 } else { |
|
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1126 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
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1127 MutexLockerEx x(Heap_lock); |
|
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1128 *gc_count_before_ret = total_collections(); |
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1129 return NULL; |
|
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1130 } |
|
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1131 // The GCLocker is either active or the GCLocker initiated |
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1132 // GC has not yet been performed. Stall until it is and |
|
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1133 // then retry the allocation. |
|
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1134 GC_locker::stall_until_clear(); |
|
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1135 (*gclocker_retry_count_ret) += 1; |
|
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1136 } |
|
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1137 |
| 10405 | 1138 // We can reach here if we were unsuccessful in scheduling a |
|
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1139 // collection (because another thread beat us to it) or if we were |
|
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1140 // stalled due to the GC locker. In either can we should retry the |
|
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1141 // allocation attempt in case another thread successfully |
|
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1142 // performed a collection and reclaimed enough space. Give a |
|
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1143 // warning if we seem to be looping forever. |
|
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1144 |
|
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1145 if ((QueuedAllocationWarningCount > 0) && |
|
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1146 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1147 warning("G1CollectedHeap::attempt_allocation_humongous() " |
|
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1148 "retries %d times", try_count); |
|
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1149 } |
|
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|
1150 } |
|
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1151 |
|
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|
1152 ShouldNotReachHere(); |
|
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|
1153 return NULL; |
|
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|
1154 } |
|
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1155 |
|
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1156 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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1157 bool expect_null_mutator_alloc_region) { |
| 2152 | 1158 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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|
1159 assert(_mutator_alloc_region.get() == NULL || |
|
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|
1160 !expect_null_mutator_alloc_region, |
|
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|
1161 "the current alloc region was unexpectedly found to be non-NULL"); |
|
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|
1162 |
|
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|
1163 if (!isHumongous(word_size)) { |
|
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|
1164 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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1165 false /* bot_updates */); |
|
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1166 } else { |
|
4829
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|
1167 HeapWord* result = humongous_obj_allocate(word_size); |
|
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|
1168 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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|
1169 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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|
1170 } |
|
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|
1171 return result; |
|
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|
1172 } |
|
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|
1173 |
|
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|
1174 ShouldNotReachHere(); |
| 342 | 1175 } |
| 1176 | |
| 1177 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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1178 G1CollectedHeap* _g1h; |
| 342 | 1179 ModRefBarrierSet* _mr_bs; |
| 1180 public: | |
|
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1181 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
| 12080 | 1182 _g1h(g1h), _mr_bs(mr_bs) {} |
| 1183 | |
| 342 | 1184 bool doHeapRegion(HeapRegion* r) { |
| 12080 | 1185 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1186 | |
|
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|
1187 if (r->continuesHumongous()) { |
| 12080 | 1188 // We'll assert that the strong code root list and RSet is empty |
| 1189 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
| 1190 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
| 342 | 1191 return false; |
|
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1192 } |
| 12080 | 1193 |
|
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1194 _g1h->reset_gc_time_stamps(r); |
| 12080 | 1195 hrrs->clear(); |
| 342 | 1196 // You might think here that we could clear just the cards |
| 1197 // corresponding to the used region. But no: if we leave a dirty card | |
| 1198 // in a region we might allocate into, then it would prevent that card | |
| 1199 // from being enqueued, and cause it to be missed. | |
| 1200 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1201 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 12080 | 1202 |
| 342 | 1203 return false; |
| 1204 } | |
| 1205 }; | |
| 1206 | |
|
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1207 void G1CollectedHeap::clear_rsets_post_compaction() { |
|
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1208 PostMCRemSetClearClosure rs_clear(this, mr_bs()); |
|
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|
1209 heap_region_iterate(&rs_clear); |
|
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1210 } |
| 342 | 1211 |
|
626
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|
1212 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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|
1213 G1CollectedHeap* _g1h; |
|
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|
1214 UpdateRSOopClosure _cl; |
|
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|
1215 int _worker_i; |
|
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|
1216 public: |
|
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|
1217 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1218 _cl(g1->g1_rem_set(), worker_i), |
|
626
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1219 _worker_i(worker_i), |
|
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1220 _g1h(g1) |
|
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|
1221 { } |
|
1960
878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
johnc
parents:
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|
1222 |
|
626
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|
1223 bool doHeapRegion(HeapRegion* r) { |
|
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1224 if (!r->continuesHumongous()) { |
|
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|
1225 _cl.set_from(r); |
|
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|
1226 r->oop_iterate(&_cl); |
|
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|
1227 } |
|
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|
1228 return false; |
|
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|
1229 } |
|
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|
1230 }; |
|
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|
1231 |
|
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|
1232 class ParRebuildRSTask: public AbstractGangTask { |
|
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1233 G1CollectedHeap* _g1; |
|
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1234 public: |
|
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|
1235 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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1236 : AbstractGangTask("ParRebuildRSTask"), |
|
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1237 _g1(g1) |
|
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1238 { } |
|
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|
1239 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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|
1240 void work(uint worker_id) { |
|
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|
1241 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
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|
1242 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
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|
1243 _g1->workers()->active_workers(), |
|
626
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1244 HeapRegion::RebuildRSClaimValue); |
|
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|
1245 } |
|
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|
1246 }; |
|
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|
1247 |
|
3778
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1248 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
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1249 private: |
|
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1250 G1HRPrinter* _hr_printer; |
|
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1251 public: |
|
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|
1252 bool doHeapRegion(HeapRegion* hr) { |
|
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|
1253 assert(!hr->is_young(), "not expecting to find young regions"); |
|
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1254 // We only generate output for non-empty regions. |
|
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1255 if (!hr->is_empty()) { |
|
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1256 if (!hr->isHumongous()) { |
|
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|
1257 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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|
1258 } else if (hr->startsHumongous()) { |
|
6254
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|
1259 if (hr->region_num() == 1) { |
|
3778
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1260 // single humongous region |
|
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|
1261 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
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|
1262 } else { |
|
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|
1263 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
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|
1264 } |
|
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|
1265 } else { |
|
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|
1266 assert(hr->continuesHumongous(), "only way to get here"); |
|
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|
1267 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
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|
1268 } |
|
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|
1269 } |
|
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|
1270 return false; |
|
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|
1271 } |
|
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|
1272 |
|
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|
1273 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
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|
1274 : _hr_printer(hr_printer) { } |
|
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|
1275 }; |
|
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|
1276 |
|
6254
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|
1277 void G1CollectedHeap::print_hrs_post_compaction() { |
|
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|
1278 PostCompactionPrinterClosure cl(hr_printer()); |
|
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|
1279 heap_region_iterate(&cl); |
|
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|
1280 } |
|
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|
1281 |
| 1973 | 1282 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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parents:
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diff
changeset
|
1283 bool clear_all_soft_refs, |
| 342 | 1284 size_t word_size) { |
| 2152 | 1285 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1286 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
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1313
diff
changeset
|
1287 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1288 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
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diff
changeset
|
1289 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
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diff
changeset
|
1290 |
| 10405 | 1291 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
| 1292 gc_timer->register_gc_start(os::elapsed_counter()); | |
| 1293 | |
| 1294 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
| 1295 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
| 1296 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1297 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1298 ResourceMark rm; |
| 1299 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
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changeset
|
1300 print_heap_before_gc(); |
| 10405 | 1301 trace_heap_before_gc(gc_tracer); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
changeset
|
1302 |
|
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10182
diff
changeset
|
1303 size_t metadata_prev_used = MetaspaceAux::allocated_used_bytes(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
1304 |
| 4072 | 1305 HRSPhaseSetter x(HRSPhaseFullGC); |
| 2152 | 1306 verify_region_sets_optional(); |
| 342 | 1307 |
|
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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diff
changeset
|
1308 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.
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1360
diff
changeset
|
1309 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
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1360
diff
changeset
|
1310 |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
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1360
diff
changeset
|
1311 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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changeset
|
1312 |
| 342 | 1313 { |
| 1314 IsGCActiveMark x; | |
| 1315 | |
| 1316 // Timing | |
| 6030 | 1317 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
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parents:
5987
diff
changeset
|
1318 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
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changeset
|
1319 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1320 |
| 342 | 1321 { |
| 10405 | 1322 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL); |
|
10098
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|
1323 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
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|
1324 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
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|
1325 |
|
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|
1326 double start = os::elapsedTime(); |
|
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|
1327 g1_policy()->record_full_collection_start(); |
|
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|
1328 |
|
71013d764f6e
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|
1329 // Note: When we have a more flexible GC logging framework that |
|
71013d764f6e
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|
1330 // allows us to add optional attributes to a GC log record we |
|
71013d764f6e
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|
1331 // could consider timing and reporting how long we wait in the |
|
71013d764f6e
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|
1332 // following two methods. |
|
71013d764f6e
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|
1333 wait_while_free_regions_coming(); |
|
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|
1334 // If we start the compaction before the CM threads finish |
|
71013d764f6e
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|
1335 // scanning the root regions we might trip them over as we'll |
|
71013d764f6e
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|
1336 // be moving objects / updating references. So let's wait until |
|
71013d764f6e
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|
1337 // 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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|
1338 // early. |
|
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|
1339 _cm->root_regions()->abort(); |
|
71013d764f6e
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changeset
|
1340 _cm->root_regions()->wait_until_scan_finished(); |
|
71013d764f6e
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|
1341 append_secondary_free_list_if_not_empty_with_lock(); |
|
71013d764f6e
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|
1342 |
|
71013d764f6e
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|
1343 gc_prologue(true); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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|
1344 increment_total_collections(true /* full gc */); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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|
1345 increment_old_marking_cycles_started(); |
|
71013d764f6e
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|
1346 |
|
71013d764f6e
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diff
changeset
|
1347 assert(used() == recalculate_used(), "Should be equal"); |
|
71013d764f6e
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diff
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|
1348 |
|
71013d764f6e
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changeset
|
1349 verify_before_gc(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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|
1350 |
| 10405 | 1351 pre_full_gc_dump(gc_timer); |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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|
1352 |
|
71013d764f6e
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changeset
|
1353 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
71013d764f6e
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diff
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|
1354 |
|
71013d764f6e
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|
1355 // Disable discovery and empty the discovered lists |
|
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1356 // for the CM ref processor. |
|
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1357 ref_processor_cm()->disable_discovery(); |
|
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1358 ref_processor_cm()->abandon_partial_discovery(); |
|
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1359 ref_processor_cm()->verify_no_references_recorded(); |
|
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1360 |
|
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1361 // Abandon current iterations of concurrent marking and concurrent |
|
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1362 // refinement, if any are in progress. We have to do this before |
|
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1363 // wait_until_scan_finished() below. |
|
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1364 concurrent_mark()->abort(); |
|
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1365 |
|
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1366 // Make sure we'll choose a new allocation region afterwards. |
|
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1367 release_mutator_alloc_region(); |
|
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1368 abandon_gc_alloc_regions(); |
|
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1369 g1_rem_set()->cleanupHRRS(); |
|
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1370 |
|
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1371 // We should call this after we retire any currently active alloc |
|
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1372 // regions so that all the ALLOC / RETIRE events are generated |
|
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1373 // before the start GC event. |
|
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1374 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
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1375 |
|
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1376 // We may have added regions to the current incremental collection |
|
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1377 // set between the last GC or pause and now. We need to clear the |
|
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1378 // incremental collection set and then start rebuilding it afresh |
|
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1379 // after this full GC. |
|
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1380 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
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1381 g1_policy()->clear_incremental_cset(); |
|
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1382 g1_policy()->stop_incremental_cset_building(); |
|
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1383 |
|
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1384 tear_down_region_sets(false /* free_list_only */); |
|
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1385 g1_policy()->set_gcs_are_young(true); |
|
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|
1386 |
|
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1387 // See the comments in g1CollectedHeap.hpp and |
|
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1388 // G1CollectedHeap::ref_processing_init() about |
|
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1389 // how reference processing currently works in G1. |
|
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|
1390 |
|
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|
1391 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
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|
1392 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
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|
1393 |
|
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|
1394 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
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|
1395 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
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|
1396 |
|
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|
1397 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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|
1398 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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|
1399 |
|
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|
1400 // Do collection work |
|
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|
1401 { |
|
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|
1402 HandleMark hm; // Discard invalid handles created during gc |
|
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|
1403 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
|
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|
1404 } |
|
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|
1405 |
|
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|
1406 assert(free_regions() == 0, "we should not have added any free regions"); |
|
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|
1407 rebuild_region_sets(false /* free_list_only */); |
|
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|
1408 |
|
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|
1409 // Enqueue any discovered reference objects that have |
|
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1410 // not been removed from the discovered lists. |
|
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|
1411 ref_processor_stw()->enqueue_discovered_references(); |
|
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|
1412 |
|
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|
1413 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
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|
1414 |
|
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|
1415 MemoryService::track_memory_usage(); |
|
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|
1416 |
|
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|
1417 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
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|
1418 ref_processor_stw()->verify_no_references_recorded(); |
|
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|
1419 |
|
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|
1420 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
|
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|
1421 ClassLoaderDataGraph::purge(); |
| 12080 | 1422 MetaspaceAux::verify_metrics(); |
|
10098
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|
1423 |
|
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1424 // Note: since we've just done a full GC, concurrent |
|
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|
1425 // marking is no longer active. Therefore we need not |
|
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|
1426 // re-enable reference discovery for the CM ref processor. |
|
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|
1427 // That will be done at the start of the next marking cycle. |
|
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|
1428 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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|
1429 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1430 |
|
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|
1431 reset_gc_time_stamp(); |
|
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|
1432 // Since everything potentially moved, we will clear all remembered |
| 10405 | 1433 // sets, and clear all cards. Later we will rebuild remembered |
|
10098
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1434 // sets. We will also reset the GC time stamps of the regions. |
|
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|
1435 clear_rsets_post_compaction(); |
|
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|
1436 check_gc_time_stamps(); |
|
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|
1437 |
|
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|
1438 // Resize the heap if necessary. |
|
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|
1439 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
|
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|
1440 |
|
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|
1441 if (_hr_printer.is_active()) { |
|
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|
1442 // We should do this after we potentially resize the heap so |
|
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|
1443 // that all the COMMIT / UNCOMMIT events are generated before |
|
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|
1444 // the end GC event. |
|
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|
1445 |
|
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|
1446 print_hrs_post_compaction(); |
|
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|
1447 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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|
1448 } |
|
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|
1449 |
|
10246
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|
1450 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
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|
1451 if (hot_card_cache->use_cache()) { |
|
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|
1452 hot_card_cache->reset_card_counts(); |
|
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|
1453 hot_card_cache->reset_hot_cache(); |
|
10098
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|
1454 } |
|
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|
1455 |
|
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|
1456 // Rebuild remembered sets of all regions. |
|
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|
1457 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
1458 uint n_workers = |
|
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|
1459 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1460 workers()->active_workers(), |
|
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|
1461 Threads::number_of_non_daemon_threads()); |
|
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|
1462 assert(UseDynamicNumberOfGCThreads || |
|
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|
1463 n_workers == workers()->total_workers(), |
|
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|
1464 "If not dynamic should be using all the workers"); |
|
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|
1465 workers()->set_active_workers(n_workers); |
|
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|
1466 // Set parallel threads in the heap (_n_par_threads) only |
|
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|
1467 // before a parallel phase and always reset it to 0 after |
|
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|
1468 // the phase so that the number of parallel threads does |
|
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|
1469 // no get carried forward to a serial phase where there |
|
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|
1470 // may be code that is "possibly_parallel". |
|
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|
1471 set_par_threads(n_workers); |
|
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|
1472 |
|
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|
1473 ParRebuildRSTask rebuild_rs_task(this); |
|
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|
1474 assert(check_heap_region_claim_values( |
|
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1475 HeapRegion::InitialClaimValue), "sanity check"); |
|
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|
1476 assert(UseDynamicNumberOfGCThreads || |
|
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|
1477 workers()->active_workers() == workers()->total_workers(), |
|
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1478 "Unless dynamic should use total workers"); |
|
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|
1479 // Use the most recent number of active workers |
|
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|
1480 assert(workers()->active_workers() > 0, |
|
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1481 "Active workers not properly set"); |
|
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|
1482 set_par_threads(workers()->active_workers()); |
|
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1483 workers()->run_task(&rebuild_rs_task); |
|
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|
1484 set_par_threads(0); |
|
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|
1485 assert(check_heap_region_claim_values( |
|
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1486 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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1487 reset_heap_region_claim_values(); |
|
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1488 } else { |
|
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|
1489 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1490 heap_region_iterate(&rebuild_rs); |
|
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1491 } |
|
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|
1492 |
| 12080 | 1493 // Rebuild the strong code root lists for each region |
| 1494 rebuild_strong_code_roots(); | |
| 1495 | |
|
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1496 if (true) { // FIXME |
|
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|
1497 MetaspaceGC::compute_new_size(); |
|
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|
1498 } |
| 342 | 1499 |
|
546
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|
1500 #ifdef TRACESPINNING |
|
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1501 ParallelTaskTerminator::print_termination_counts(); |
|
546
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|
1502 #endif |
|
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|
1503 |
|
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|
1504 // Discard all rset updates |
|
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|
1505 JavaThread::dirty_card_queue_set().abandon_logs(); |
|
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|
1506 assert(!G1DeferredRSUpdate |
|
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1507 || (G1DeferredRSUpdate && |
|
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|
1508 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
|
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|
1509 |
|
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|
1510 _young_list->reset_sampled_info(); |
|
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|
1511 // At this point there should be no regions in the |
|
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|
1512 // entire heap tagged as young. |
|
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|
1513 assert(check_young_list_empty(true /* check_heap */), |
|
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|
1514 "young list should be empty at this point"); |
|
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|
1515 |
|
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|
1516 // Update the number of full collections that have been completed. |
|
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|
1517 increment_old_marking_cycles_completed(false /* concurrent */); |
|
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|
1518 |
|
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|
1519 _hrs.verify_optional(); |
|
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|
1520 verify_region_sets_optional(); |
|
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|
1521 |
|
10373
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|
1522 verify_after_gc(); |
|
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|
1523 |
|
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|
1524 // Start a new incremental collection set for the next pause |
|
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|
1525 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
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|
1526 g1_policy()->start_incremental_cset_building(); |
|
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|
1527 |
|
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|
1528 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
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|
1529 // regions to the incremental collection set for the next |
|
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|
1530 // evacuation pause. |
|
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|
1531 clear_cset_fast_test(); |
|
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|
1532 |
|
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|
1533 init_mutator_alloc_region(); |
|
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|
1534 |
|
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|
1535 double end = os::elapsedTime(); |
|
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|
1536 g1_policy()->record_full_collection_end(); |
|
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|
1537 |
|
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|
1538 if (G1Log::fine()) { |
|
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|
1539 g1_policy()->print_heap_transition(); |
|
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|
1540 } |
|
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|
1541 |
|
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1542 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
|
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|
1543 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
|
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|
1544 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
|
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1545 // before any GC notifications are raised. |
|
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|
1546 g1mm()->update_sizes(); |
|
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|
1547 |
|
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|
1548 gc_epilogue(true); |
|
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|
1549 } |
|
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|
1550 |
|
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|
1551 if (G1Log::finer()) { |
|
10291
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|
1552 g1_policy()->print_detailed_heap_transition(true /* full */); |
|
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|
1553 } |
|
6121
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|
1554 |
|
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|
1555 print_heap_after_gc(); |
| 10405 | 1556 trace_heap_after_gc(gc_tracer); |
| 1557 | |
| 1558 post_full_gc_dump(gc_timer); | |
| 1559 | |
| 1560 gc_timer->register_gc_end(os::elapsed_counter()); | |
| 1561 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); | |
|
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|
1562 } |
| 1973 | 1563 |
| 1564 return true; | |
| 342 | 1565 } |
| 1566 | |
| 1567 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1568 // do_collection() will return whether it succeeded in performing |
| 1569 // the GC. Currently, there is no facility on the | |
| 1570 // do_full_collection() API to notify the caller than the collection | |
| 1571 // did not succeed (e.g., because it was locked out by the GC | |
| 1572 // locker). So, right now, we'll ignore the return value. | |
| 1573 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1574 clear_all_soft_refs, | |
| 1575 0 /* word_size */); | |
| 342 | 1576 } |
| 1577 | |
| 1578 // This code is mostly copied from TenuredGeneration. | |
| 1579 void | |
| 1580 G1CollectedHeap:: | |
| 1581 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1582 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, "sanity check"); | |
| 1583 | |
| 1584 // Include the current allocation, if any, and bytes that will be | |
| 1585 // pre-allocated to support collections, as "used". | |
| 1586 const size_t used_after_gc = used(); | |
| 1587 const size_t capacity_after_gc = capacity(); | |
| 1588 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1589 | |
|
1717
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|
1590 // This is enforced in arguments.cpp. |
|
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|
1591 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
|
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1592 "otherwise the code below doesn't make sense"); |
|
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|
1593 |
| 342 | 1594 // We don't have floating point command-line arguments |
|
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|
1595 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1596 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
1717
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|
1597 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1598 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1599 | |
|
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|
1600 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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|
1601 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
|
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1602 |
|
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|
1603 // We have to be careful here as these two calculations can overflow |
|
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|
1604 // 32-bit size_t's. |
|
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|
1605 double used_after_gc_d = (double) used_after_gc; |
|
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|
1606 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
|
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|
1607 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
|
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|
1608 |
|
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|
1609 // Let's make sure that they are both under the max heap size, which |
|
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|
1610 // by default will make them fit into a size_t. |
|
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|
1611 double desired_capacity_upper_bound = (double) max_heap_size; |
|
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|
1612 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
|
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|
1613 desired_capacity_upper_bound); |
|
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|
1614 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
|
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|
1615 desired_capacity_upper_bound); |
|
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1616 |
|
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|
1617 // We can now safely turn them into size_t's. |
|
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|
1618 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
|
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1619 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1620 |
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1621 // This assert only makes sense here, before we adjust them |
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1622 // with respect to the min and max heap size. |
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1623 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1624 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1625 "maximum_desired_capacity = "SIZE_FORMAT, |
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1626 minimum_desired_capacity, maximum_desired_capacity)); |
|
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1627 |
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1628 // Should not be greater than the heap max size. No need to adjust |
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1629 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1630 // we'll try to make the capacity larger than it, not smaller). |
|
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1631 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1632 // Should not be less than the heap min size. No need to adjust it |
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1633 // with respect to the heap max size as it's an upper bound (i.e., |
|
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1634 // we'll try to make the capacity smaller than it, not greater). |
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1635 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1636 |
|
1717
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1637 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1638 // Don't expand unless it's significant |
| 1639 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1640 ergo_verbose4(ErgoHeapSizing, |
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1641 "attempt heap expansion", |
|
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1642 ergo_format_reason("capacity lower than " |
|
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1643 "min desired capacity after Full GC") |
|
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1644 ergo_format_byte("capacity") |
|
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1645 ergo_format_byte("occupancy") |
|
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1646 ergo_format_byte_perc("min desired capacity"), |
|
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1647 capacity_after_gc, used_after_gc, |
|
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1648 minimum_desired_capacity, (double) MinHeapFreeRatio); |
|
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1649 expand(expand_bytes); |
| 342 | 1650 |
| 1651 // No expansion, now see if we want to shrink | |
|
1717
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1652 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1653 // Capacity too large, compute shrinking size |
| 1654 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1655 ergo_verbose4(ErgoHeapSizing, |
|
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1656 "attempt heap shrinking", |
|
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1657 ergo_format_reason("capacity higher than " |
|
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1658 "max desired capacity after Full GC") |
|
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1659 ergo_format_byte("capacity") |
|
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|
1660 ergo_format_byte("occupancy") |
|
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1661 ergo_format_byte_perc("max desired capacity"), |
|
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1662 capacity_after_gc, used_after_gc, |
|
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|
1663 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1664 shrink(shrink_bytes); |
| 1665 } | |
| 1666 } | |
| 1667 | |
| 1668 | |
| 1669 HeapWord* | |
| 1973 | 1670 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1671 bool* succeeded) { | |
| 2152 | 1672 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1673 |
| 1674 *succeeded = true; | |
| 1675 // Let's attempt the allocation first. | |
|
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1676 HeapWord* result = |
|
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1677 attempt_allocation_at_safepoint(word_size, |
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1678 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1679 if (result != NULL) { |
| 1680 assert(*succeeded, "sanity"); | |
| 1681 return result; | |
| 1682 } | |
| 342 | 1683 |
| 1684 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1685 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1686 // expansion over collection. (This might change in the future if we can | |
| 1687 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1688 result = expand_and_allocate(word_size); | |
| 1689 if (result != NULL) { | |
| 1973 | 1690 assert(*succeeded, "sanity"); |
| 342 | 1691 return result; |
| 1692 } | |
| 1693 | |
| 1973 | 1694 // Expansion didn't work, we'll try to do a Full GC. |
| 1695 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1696 false, /* clear_all_soft_refs */ | |
| 1697 word_size); | |
| 1698 if (!gc_succeeded) { | |
| 1699 *succeeded = false; | |
| 1700 return NULL; | |
| 1701 } | |
| 1702 | |
| 1703 // Retry the allocation | |
| 1704 result = attempt_allocation_at_safepoint(word_size, | |
|
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1705 true /* expect_null_mutator_alloc_region */); |
| 342 | 1706 if (result != NULL) { |
| 1973 | 1707 assert(*succeeded, "sanity"); |
| 342 | 1708 return result; |
| 1709 } | |
| 1710 | |
| 1973 | 1711 // Then, try a Full GC that will collect all soft references. |
| 1712 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1713 true, /* clear_all_soft_refs */ | |
| 1714 word_size); | |
| 1715 if (!gc_succeeded) { | |
| 1716 *succeeded = false; | |
| 1717 return NULL; | |
| 1718 } | |
| 1719 | |
| 1720 // Retry the allocation once more | |
| 1721 result = attempt_allocation_at_safepoint(word_size, | |
|
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1722 true /* expect_null_mutator_alloc_region */); |
| 342 | 1723 if (result != NULL) { |
| 1973 | 1724 assert(*succeeded, "sanity"); |
| 342 | 1725 return result; |
| 1726 } | |
| 1727 | |
|
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1728 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1729 "Flag should have been handled and cleared prior to this point"); |
|
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1730 |
| 342 | 1731 // What else? We might try synchronous finalization later. If the total |
| 1732 // space available is large enough for the allocation, then a more | |
| 1733 // complete compaction phase than we've tried so far might be | |
| 1734 // appropriate. | |
| 1973 | 1735 assert(*succeeded, "sanity"); |
| 342 | 1736 return NULL; |
| 1737 } | |
| 1738 | |
| 1739 // Attempting to expand the heap sufficiently | |
| 1740 // to support an allocation of the given "word_size". If | |
| 1741 // successful, perform the allocation and return the address of the | |
| 1742 // allocated block, or else "NULL". | |
| 1743 | |
| 1744 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1745 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1746 | |
| 1747 verify_region_sets_optional(); | |
| 1973 | 1748 |
|
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1749 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1750 ergo_verbose1(ErgoHeapSizing, |
|
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1751 "attempt heap expansion", |
|
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|
1752 ergo_format_reason("allocation request failed") |
|
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1753 ergo_format_byte("allocation request"), |
|
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1754 word_size * HeapWordSize); |
|
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1755 if (expand(expand_bytes)) { |
| 3766 | 1756 _hrs.verify_optional(); |
|
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1757 verify_region_sets_optional(); |
|
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1758 return attempt_allocation_at_safepoint(word_size, |
|
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1759 false /* expect_null_mutator_alloc_region */); |
|
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1760 } |
|
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1761 return NULL; |
| 342 | 1762 } |
| 1763 | |
| 3766 | 1764 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
| 1765 HeapWord* new_end) { | |
| 1766 assert(old_end != new_end, "don't call this otherwise"); | |
| 1767 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
| 1768 | |
| 1769 // Update the committed mem region. | |
| 1770 _g1_committed.set_end(new_end); | |
| 1771 // Tell the card table about the update. | |
| 1772 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
| 1773 // Tell the BOT about the update. | |
| 1774 _bot_shared->resize(_g1_committed.word_size()); | |
|
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1775 // Tell the hot card cache about the update |
|
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1776 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
| 3766 | 1777 } |
| 1778 | |
|
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1779 bool G1CollectedHeap::expand(size_t expand_bytes) { |
| 342 | 1780 size_t old_mem_size = _g1_storage.committed_size(); |
|
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1781 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1782 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1783 HeapRegion::GrainBytes); | |
|
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1784 ergo_verbose2(ErgoHeapSizing, |
|
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1785 "expand the heap", |
|
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1786 ergo_format_byte("requested expansion amount") |
|
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1787 ergo_format_byte("attempted expansion amount"), |
|
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1788 expand_bytes, aligned_expand_bytes); |
|
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1789 |
| 3766 | 1790 // First commit the memory. |
| 1791 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
|
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1792 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
|
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1793 if (successful) { |
| 3766 | 1794 // Then propagate this update to the necessary data structures. |
| 1795 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
| 1796 update_committed_space(old_end, new_end); | |
| 1797 | |
| 1798 FreeRegionList expansion_list("Local Expansion List"); | |
| 1799 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
| 1800 assert(mr.start() == old_end, "post-condition"); | |
| 1801 // mr might be a smaller region than what was requested if | |
| 1802 // expand_by() was unable to allocate the HeapRegion instances | |
| 1803 assert(mr.end() <= new_end, "post-condition"); | |
| 1804 | |
| 1805 size_t actual_expand_bytes = mr.byte_size(); | |
| 1806 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
| 1807 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
| 1808 "post-condition"); | |
| 1809 if (actual_expand_bytes < aligned_expand_bytes) { | |
| 1810 // We could not expand _hrs to the desired size. In this case we | |
| 1811 // need to shrink the committed space accordingly. | |
| 1812 assert(mr.end() < new_end, "invariant"); | |
| 1813 | |
| 1814 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
| 1815 // First uncommit the memory. | |
| 1816 _g1_storage.shrink_by(diff_bytes); | |
| 1817 // Then propagate this update to the necessary data structures. | |
| 1818 update_committed_space(new_end, mr.end()); | |
|
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|
1819 } |
| 3766 | 1820 _free_list.add_as_tail(&expansion_list); |
|
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1821 |
|
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1822 if (_hr_printer.is_active()) { |
|
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1823 HeapWord* curr = mr.start(); |
|
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1824 while (curr < mr.end()) { |
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1825 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
|
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1826 _hr_printer.commit(curr, curr_end); |
|
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|
1827 curr = curr_end; |
|
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1828 } |
|
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1829 assert(curr == mr.end(), "post-condition"); |
|
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1830 } |
|
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1831 g1_policy()->record_new_heap_size(n_regions()); |
|
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1832 } else { |
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1833 ergo_verbose0(ErgoHeapSizing, |
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1834 "did not expand the heap", |
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1835 ergo_format_reason("heap expansion operation failed")); |
|
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1836 // The expansion of the virtual storage space was unsuccessful. |
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1837 // Let's see if it was because we ran out of swap. |
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1838 if (G1ExitOnExpansionFailure && |
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1839 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1840 // We had head room... |
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1841 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
| 342 | 1842 } |
| 1843 } | |
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1844 return successful; |
| 342 | 1845 } |
| 1846 | |
| 3766 | 1847 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1848 size_t old_mem_size = _g1_storage.committed_size(); |
| 1849 size_t aligned_shrink_bytes = | |
| 1850 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1851 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1852 HeapRegion::GrainBytes); | |
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1853 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1854 |
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1855 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
| 3766 | 1856 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
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1857 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1858 |
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1859 ergo_verbose3(ErgoHeapSizing, |
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1860 "shrink the heap", |
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1861 ergo_format_byte("requested shrinking amount") |
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1862 ergo_format_byte("aligned shrinking amount") |
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1863 ergo_format_byte("attempted shrinking amount"), |
|
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1864 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1865 if (num_regions_removed > 0) { |
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1866 _g1_storage.shrink_by(shrunk_bytes); |
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1867 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1868 |
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1869 if (_hr_printer.is_active()) { |
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1870 HeapWord* curr = old_end; |
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1871 while (curr > new_end) { |
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1872 HeapWord* curr_end = curr; |
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1873 curr -= HeapRegion::GrainWords; |
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1874 _hr_printer.uncommit(curr, curr_end); |
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1875 } |
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1876 } |
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1877 |
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1878 _expansion_regions += num_regions_removed; |
| 3766 | 1879 update_committed_space(old_end, new_end); |
| 1880 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1881 g1_policy()->record_new_heap_size(n_regions()); |
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1882 } else { |
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1883 ergo_verbose0(ErgoHeapSizing, |
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1884 "did not shrink the heap", |
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1885 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1886 } |
| 1887 } | |
| 1888 | |
| 1889 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1890 verify_region_sets_optional(); |
| 1891 | |
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1892 // We should only reach here at the end of a Full GC which means we |
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1893 // should not not be holding to any GC alloc regions. The method |
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1894 // below will make sure of that and do any remaining clean up. |
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1895 abandon_gc_alloc_regions(); |
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1896 |
| 2152 | 1897 // Instead of tearing down / rebuilding the free lists here, we |
| 1898 // could instead use the remove_all_pending() method on free_list to | |
| 1899 // remove only the ones that we need to remove. | |
| 4072 | 1900 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1901 shrink_helper(shrink_bytes); |
| 4072 | 1902 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1903 |
| 3766 | 1904 _hrs.verify_optional(); |
| 2152 | 1905 verify_region_sets_optional(); |
| 342 | 1906 } |
| 1907 | |
| 1908 // Public methods. | |
| 1909 | |
| 1910 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1911 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1912 #endif // _MSC_VER | |
| 1913 | |
| 1914 | |
| 1915 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1916 SharedHeap(policy_), | |
| 1917 _g1_policy(policy_), | |
| 1111 | 1918 _dirty_card_queue_set(false), |
| 1705 | 1919 _into_cset_dirty_card_queue_set(false), |
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1920 _is_alive_closure_cm(this), |
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1921 _is_alive_closure_stw(this), |
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1922 _ref_processor_cm(NULL), |
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1923 _ref_processor_stw(NULL), |
| 342 | 1924 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1925 _bot_shared(NULL), | |
| 10405 | 1926 _evac_failure_scan_stack(NULL), |
| 342 | 1927 _mark_in_progress(false), |
| 2152 | 1928 _cg1r(NULL), _summary_bytes_used(0), |
|
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1929 _g1mm(NULL), |
| 342 | 1930 _refine_cte_cl(NULL), |
| 1931 _full_collection(false), | |
| 2152 | 1932 _free_list("Master Free List"), |
| 1933 _secondary_free_list("Secondary Free List"), | |
| 4072 | 1934 _old_set("Old Set"), |
| 2152 | 1935 _humongous_set("Master Humongous Set"), |
| 1936 _free_regions_coming(false), | |
| 342 | 1937 _young_list(new YoungList(this)), |
| 1938 _gc_time_stamp(0), | |
|
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1939 _retained_old_gc_alloc_region(NULL), |
| 6595 | 1940 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1941 _old_plab_stats(OldPLABSize, PLABWeight), | |
|
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1942 _expand_heap_after_alloc_failure(true), |
| 526 | 1943 _surviving_young_words(NULL), |
|
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1944 _old_marking_cycles_started(0), |
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1945 _old_marking_cycles_completed(0), |
| 10405 | 1946 _concurrent_cycle_started(false), |
| 526 | 1947 _in_cset_fast_test(NULL), |
|
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1948 _in_cset_fast_test_base(NULL), |
|
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1949 _dirty_cards_region_list(NULL), |
|
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1950 _worker_cset_start_region(NULL), |
| 10405 | 1951 _worker_cset_start_region_time_stamp(NULL), |
| 1952 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
| 1953 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
| 1954 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
| 1955 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
| 1956 | |
| 1957 _g1h = this; | |
| 342 | 1958 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
| 1959 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1960 } | |
|
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1961 |
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1962 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1963 |
| 342 | 1964 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1965 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1966 | |
| 1967 int n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); | |
| 1968 assert(n_rem_sets > 0, "Invariant."); | |
| 1969 | |
| 6197 | 1970 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1971 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
| 10405 | 1972 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
|
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1973 |
| 342 | 1974 for (int i = 0; i < n_queues; i++) { |
| 1975 RefToScanQueue* q = new RefToScanQueue(); | |
| 1976 q->initialize(); | |
| 1977 _task_queues->register_queue(i, q); | |
| 10405 | 1978 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
| 1979 } | |
|
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1980 clear_cset_start_regions(); |
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1981 |
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1982 // Initialize the G1EvacuationFailureALot counters and flags. |
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1983 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1984 |
| 342 | 1985 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1986 } | |
| 1987 | |
| 1988 jint G1CollectedHeap::initialize() { | |
| 1166 | 1989 CollectedHeap::pre_initialize(); |
| 342 | 1990 os::enable_vtime(); |
| 1991 | |
|
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1992 G1Log::init(); |
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1993 |
| 342 | 1994 // Necessary to satisfy locking discipline assertions. |
| 1995 | |
| 1996 MutexLocker x(Heap_lock); | |
| 1997 | |
|
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1998 // We have to initialize the printer before committing the heap, as |
|
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1999 // it will be used then. |
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2000 _hr_printer.set_active(G1PrintHeapRegions); |
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2001 |
| 342 | 2002 // While there are no constraints in the GC code that HeapWordSize |
| 2003 // be any particular value, there are multiple other areas in the | |
| 2004 // system which believe this to be true (e.g. oop->object_size in some | |
| 2005 // cases incorrectly returns the size in wordSize units rather than | |
| 2006 // HeapWordSize). | |
| 2007 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 2008 | |
| 2009 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 2010 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
|
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2011 size_t heap_alignment = collector_policy()->max_alignment(); |
| 342 | 2012 |
| 2013 // Ensure that the sizes are properly aligned. | |
| 2014 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 2015 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
|
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2016 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
| 342 | 2017 |
|
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2018 _cg1r = new ConcurrentG1Refine(this); |
| 342 | 2019 |
| 2020 // Reserve the maximum. | |
|
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2021 |
|
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2022 // When compressed oops are enabled, the preferred heap base |
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2023 // is calculated by subtracting the requested size from the |
|
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2024 // 32Gb boundary and using the result as the base address for |
|
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2025 // heap reservation. If the requested size is not aligned to |
|
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2026 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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2027 // into the ReservedHeapSpace constructor) then the actual |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2028 // base of the reserved heap may end up differing from the |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2029 // address that was requested (i.e. the preferred heap base). |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2030 // If this happens then we could end up using a non-optimal |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2031 // compressed oops mode. |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2032 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2033 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
12082
diff
changeset
|
2034 heap_alignment); |
| 342 | 2035 |
| 2036 // It is important to do this in a way such that concurrent readers can't | |
| 10405 | 2037 // temporarily think something is in the heap. (I've actually seen this |
| 342 | 2038 // happen in asserts: DLD.) |
| 2039 _reserved.set_word_size(0); | |
| 2040 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 2041 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 2042 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2043 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
| 342 | 2044 |
| 2045 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 2046 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 2047 set_barrier_set(rem_set()->bs()); | |
| 2048 if (barrier_set()->is_a(BarrierSet::ModRef)) { | |
| 2049 _mr_bs = (ModRefBarrierSet*)_barrier_set; | |
| 2050 } else { | |
| 2051 vm_exit_during_initialization("G1 requires a mod ref bs."); | |
| 2052 return JNI_ENOMEM; | |
| 2053 } | |
| 2054 | |
| 2055 // Also create a G1 rem set. | |
| 1861 | 2056 if (mr_bs()->is_a(BarrierSet::CardTableModRef)) { |
| 2057 _g1_rem_set = new G1RemSet(this, (CardTableModRefBS*)mr_bs()); | |
| 342 | 2058 } else { |
| 1861 | 2059 vm_exit_during_initialization("G1 requires a cardtable mod ref bs."); |
| 2060 return JNI_ENOMEM; | |
| 342 | 2061 } |
| 2062 | |
| 2063 // Carve out the G1 part of the heap. | |
| 2064 | |
| 2065 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
| 2066 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
| 2067 g1_rs.size()/HeapWordSize); | |
| 2068 | |
| 2069 _g1_storage.initialize(g1_rs, 0); | |
| 2070 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
| 3766 | 2071 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
| 2072 (HeapWord*) _g1_reserved.end(), | |
| 2073 _expansion_regions); | |
| 342 | 2074 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2075 // 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
|
2076 _cg1r->init(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2077 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2078 // 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
|
2079 // in the remembered set structures. |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2080 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
|
2081 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
|
2082 |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2083 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
|
2084 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
|
2085 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2086 "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
|
2087 |
| 2152 | 2088 HeapRegionSet::set_unrealistically_long_length(max_regions() + 1); |
| 2089 | |
| 342 | 2090 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
| 2091 heap_word_size(init_byte_size)); | |
| 2092 | |
| 2093 _g1h = this; | |
| 2094 | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2095 _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
|
2096 _in_cset_fast_test_base = |
| 6197 | 2097 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
|
2098 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2099 // 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
|
2100 // 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
|
2101 // 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
|
2102 _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
|
2103 ((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
|
2104 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2105 // 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
|
2106 // 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
|
2107 // evacuation pause. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2108 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
|
2109 |
| 342 | 2110 // Create the ConcurrentMark data structure and thread. |
| 2111 // (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
|
2112 _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
|
2113 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
|
2114 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
|
2115 return JNI_ENOMEM; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2116 } |
| 342 | 2117 _cmThread = _cm->cmThread(); |
| 2118 | |
| 2119 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2120 HeapRegionRemSet::init_heap(max_regions()); | |
| 2121 | |
| 677 | 2122 // Now expand into the initial heap size. |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2123 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
|
2124 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
|
2125 return JNI_ENOMEM; |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2126 } |
| 342 | 2127 |
| 2128 // Perform any initialization actions delegated to the policy. | |
| 2129 g1_policy()->init(); | |
| 2130 | |
| 2131 _refine_cte_cl = | |
| 2132 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
| 2133 g1_rem_set(), | |
| 2134 concurrent_g1_refine()); | |
| 2135 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 2136 | |
| 2137 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2138 SATB_Q_FL_lock, | |
| 1111 | 2139 G1SATBProcessCompletedThreshold, |
| 342 | 2140 Shared_SATB_Q_lock); |
| 794 | 2141 |
| 2142 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
| 2143 DirtyCardQ_FL_lock, | |
| 1111 | 2144 concurrent_g1_refine()->yellow_zone(), |
| 2145 concurrent_g1_refine()->red_zone(), | |
| 794 | 2146 Shared_DirtyCardQ_lock); |
| 2147 | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2148 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2149 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2150 DirtyCardQ_FL_lock, |
| 1111 | 2151 -1, // never trigger processing |
| 2152 -1, // no limit on length | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2153 Shared_DirtyCardQ_lock, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2154 &JavaThread::dirty_card_queue_set()); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2155 } |
| 1705 | 2156 |
| 2157 // Initialize the card queue set used to hold cards containing | |
| 2158 // references into the collection set. | |
| 2159 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
| 2160 DirtyCardQ_FL_lock, | |
| 2161 -1, // never trigger processing | |
| 2162 -1, // no limit on length | |
| 2163 Shared_DirtyCardQ_lock, | |
| 2164 &JavaThread::dirty_card_queue_set()); | |
| 2165 | |
| 342 | 2166 // In case we're keeping closure specialization stats, initialize those |
| 2167 // counts and that mechanism. | |
| 2168 SpecializationStats::clear(); | |
| 2169 | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2170 // 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
|
2171 // 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
|
2172 // space here, lots of asserts fire. |
| 3766 | 2173 |
| 2174 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
| 2175 _g1_reserved.start()); | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2176 // 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
|
2177 // 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
|
2178 // 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
|
2179 // 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
|
2180 dummy_region->set_young(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2181 // Make sure it's full. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2182 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2183 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2184 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2185 init_mutator_alloc_region(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2186 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2187 // 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
|
2188 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2189 _g1mm = new G1MonitoringSupport(this); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2190 |
| 342 | 2191 return JNI_OK; |
| 2192 } | |
| 2193 | |
| 2194 void G1CollectedHeap::ref_processing_init() { | |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2195 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2196 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2197 // * There are two reference processor instances. One is |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 // used to record and process discovered references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2199 // during concurrent marking; the other is used to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 // record and process references during STW pauses |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // (both full and incremental). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2202 // * Both ref processors need to 'span' the entire heap as |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2203 // the regions in the collection set may be dotted around. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2204 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 // * For the concurrent marking ref processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2206 // * Reference discovery is enabled at initial marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2207 // * Reference discovery is disabled and the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2208 // references processed etc during remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 // * Reference discovery is MT (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2210 // * Reference discovery requires a barrier (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 // * Reference processing may or may not be MT |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // (depending on the value of ParallelRefProcEnabled |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 // and ParallelGCThreads). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 // * A full GC disables reference discovery by the CM |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 // ref processor and abandons any entries on it's |
|
4dfb2df418f2
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2216 // discovered lists. |
|
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|
2217 // |
|
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2218 // * For the STW processor: |
|
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2219 // * Non MT discovery is enabled at the start of a full GC. |
|
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2220 // * Processing and enqueueing during a full GC is non-MT. |
|
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2221 // * During a full GC, references are processed after marking. |
|
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|
2222 // |
|
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2223 // * Discovery (may or may not be MT) is enabled at the start |
|
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2224 // of an incremental evacuation pause. |
|
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2225 // * References are processed near the end of a STW evacuation pause. |
|
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2226 // * For both types of GC: |
|
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|
2227 // * Discovery is atomic - i.e. not concurrent. |
|
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2228 // * Reference discovery will not need a barrier. |
|
1974
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|
2229 |
| 342 | 2230 SharedHeap::ref_processing_init(); |
| 2231 MemRegion mr = reserved_region(); | |
|
3979
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|
2232 |
|
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|
2233 // Concurrent Mark ref processor |
|
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|
2234 _ref_processor_cm = |
|
2369
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|
2235 new ReferenceProcessor(mr, // span |
|
3979
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2236 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
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|
2237 // mt processing |
|
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|
2238 (int) ParallelGCThreads, |
|
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|
2239 // degree of mt processing |
|
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|
2240 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
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|
2241 // mt discovery |
|
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|
2242 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
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|
2243 // degree of mt discovery |
|
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|
2244 false, |
|
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|
2245 // Reference discovery is not atomic |
|
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|
2246 &_is_alive_closure_cm, |
|
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|
2247 // is alive closure |
|
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|
2248 // (for efficiency/performance) |
|
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|
2249 true); |
|
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|
2250 // Setting next fields of discovered |
|
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|
2251 // lists requires a barrier. |
|
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|
2252 |
|
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|
2253 // STW ref processor |
|
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|
2254 _ref_processor_stw = |
|
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|
2255 new ReferenceProcessor(mr, // span |
|
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|
2256 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
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|
2257 // mt processing |
|
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|
2258 MAX2((int)ParallelGCThreads, 1), |
|
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|
2259 // degree of mt processing |
|
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|
2260 (ParallelGCThreads > 1), |
|
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|
2261 // mt discovery |
|
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|
2262 MAX2((int)ParallelGCThreads, 1), |
|
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|
2263 // degree of mt discovery |
|
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|
2264 true, |
|
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|
2265 // Reference discovery is atomic |
|
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|
2266 &_is_alive_closure_stw, |
|
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|
2267 // is alive closure |
|
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|
2268 // (for efficiency/performance) |
|
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|
2269 false); |
|
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|
2270 // Setting next fields of discovered |
|
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|
2271 // lists requires a barrier. |
| 342 | 2272 } |
| 2273 | |
| 2274 size_t G1CollectedHeap::capacity() const { | |
| 2275 return _g1_committed.byte_size(); | |
| 2276 } | |
| 2277 | |
|
6254
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2278 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
|
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|
2279 assert(!hr->continuesHumongous(), "pre-condition"); |
|
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|
2280 hr->reset_gc_time_stamp(); |
|
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|
2281 if (hr->startsHumongous()) { |
|
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|
2282 uint first_index = hr->hrs_index() + 1; |
|
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|
2283 uint last_index = hr->last_hc_index(); |
|
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2284 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2285 HeapRegion* chr = region_at(i); |
|
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|
2286 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2287 chr->reset_gc_time_stamp(); |
|
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|
2288 } |
|
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|
2289 } |
|
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|
2290 } |
|
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|
2291 |
|
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|
2292 #ifndef PRODUCT |
|
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|
2293 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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|
2294 private: |
|
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|
2295 unsigned _gc_time_stamp; |
|
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|
2296 bool _failures; |
|
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|
2297 |
|
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|
2298 public: |
|
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|
2299 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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|
2300 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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|
2301 |
|
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|
2302 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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|
2303 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
|
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|
2304 if (_gc_time_stamp != region_gc_time_stamp) { |
|
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|
2305 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
|
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|
2306 "expected %d", HR_FORMAT_PARAMS(hr), |
|
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|
2307 region_gc_time_stamp, _gc_time_stamp); |
|
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|
2308 _failures = true; |
|
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|
2309 } |
|
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|
2310 return false; |
|
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|
2311 } |
|
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|
2312 |
|
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|
2313 bool failures() { return _failures; } |
|
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|
2314 }; |
|
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|
2315 |
|
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|
2316 void G1CollectedHeap::check_gc_time_stamps() { |
|
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|
2317 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
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|
2318 heap_region_iterate(&cl); |
|
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|
2319 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
|
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|
2320 } |
|
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|
2321 #endif // PRODUCT |
|
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|
2322 |
| 1705 | 2323 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2324 DirtyCardQueue* into_cset_dcq, | |
| 2325 bool concurrent, | |
| 342 | 2326 int worker_i) { |
| 889 | 2327 // Clean cards in the hot card cache |
|
10246
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|
2328 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
194f52aa2f23
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|
2329 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2330 |
| 342 | 2331 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2332 int n_completed_buffers = 0; | |
| 1705 | 2333 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2334 n_completed_buffers++; |
| 2335 } | |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
2336 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
| 342 | 2337 dcqs.clear_n_completed_buffers(); |
| 2338 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2339 } | |
| 2340 | |
| 2341 | |
| 2342 // Computes the sum of the storage used by the various regions. | |
| 2343 | |
| 2344 size_t G1CollectedHeap::used() const { | |
|
862
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|
2345 assert(Heap_lock->owner() != NULL, |
|
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|
2346 "Should be owned on this thread's behalf."); |
| 342 | 2347 size_t result = _summary_bytes_used; |
|
845
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|
2348 // Read only once in case it is set to NULL concurrently |
|
2433
abdfc822206f
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|
2349 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
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|
2350 if (hr != NULL) |
|
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|
2351 result += hr->used(); |
| 342 | 2352 return result; |
| 2353 } | |
| 2354 | |
|
846
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|
2355 size_t G1CollectedHeap::used_unlocked() const { |
|
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|
2356 size_t result = _summary_bytes_used; |
|
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|
2357 return result; |
|
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|
2358 } |
|
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|
2359 |
| 342 | 2360 class SumUsedClosure: public HeapRegionClosure { |
| 2361 size_t _used; | |
| 2362 public: | |
| 2363 SumUsedClosure() : _used(0) {} | |
| 2364 bool doHeapRegion(HeapRegion* r) { | |
| 2365 if (!r->continuesHumongous()) { | |
| 2366 _used += r->used(); | |
| 2367 } | |
| 2368 return false; | |
| 2369 } | |
| 2370 size_t result() { return _used; } | |
| 2371 }; | |
| 2372 | |
| 2373 size_t G1CollectedHeap::recalculate_used() const { | |
| 2374 SumUsedClosure blk; | |
| 3766 | 2375 heap_region_iterate(&blk); |
| 342 | 2376 return blk.result(); |
| 2377 } | |
| 2378 | |
| 2379 size_t G1CollectedHeap::unsafe_max_alloc() { | |
| 2152 | 2380 if (free_regions() > 0) return HeapRegion::GrainBytes; |
| 342 | 2381 // otherwise, is there space in the current allocation region? |
| 2382 | |
| 2383 // We need to store the current allocation region in a local variable | |
| 2384 // here. The problem is that this method doesn't take any locks and | |
| 2385 // there may be other threads which overwrite the current allocation | |
| 2386 // region field. attempt_allocation(), for example, sets it to NULL | |
| 2387 // and this can happen *after* the NULL check here but before the call | |
| 2388 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
| 2389 // to be a problem in the optimized build, since the two loads of the | |
| 2390 // current allocation region field are optimized away. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2391 HeapRegion* hr = _mutator_alloc_region.get(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2392 if (hr == NULL) { |
| 342 | 2393 return 0; |
| 2394 } | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2395 return hr->free(); |
| 342 | 2396 } |
| 2397 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2398 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
|
2399 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2400 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
|
2401 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
|
2402 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
|
2403 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2404 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2405 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2406 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2407 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2408 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2409 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2410 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2411 // 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
|
2412 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2413 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2414 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2415 // 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
|
2416 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2417 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2418 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2419 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2420 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2421 // 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
|
2422 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2423 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2424 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2425 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2426 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2427 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2428 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2429 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
|
2430 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
|
2431 _old_marking_cycles_started == _old_marking_cycles_completed + 1, |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2432 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
|
2433 _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
|
2434 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2435 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2436 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2437 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2438 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
|
2439 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2440 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2441 // 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
|
2442 // 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
|
2443 // 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
|
2444 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2445 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2446 // 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
|
2447 // 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
|
2448 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2449 // 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
|
2450 // 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
|
2451 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2452 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2453 // 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
|
2454 assert(concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2455 (_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
|
2456 (_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
|
2457 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
|
2458 "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
|
2459 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2460 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2461 // 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
|
2462 assert(!concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2463 (_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
|
2464 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
|
2465 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2466 "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
|
2467 _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
|
2468 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2469 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2470 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2471 // 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
|
2472 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2473 // is set) so that if a waiter requests another System.gc() it doesn't |
| 10405 | 2474 // 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
|
2475 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2476 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2477 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2478 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2479 // 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
|
2480 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2481 // 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
|
2482 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2483 FullGCCount_lock->notify_all(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2484 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2485 |
| 10405 | 2486 void G1CollectedHeap::register_concurrent_cycle_start(jlong start_time) { |
| 2487 _concurrent_cycle_started = true; | |
| 2488 _gc_timer_cm->register_gc_start(start_time); | |
| 2489 | |
| 2490 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
| 2491 trace_heap_before_gc(_gc_tracer_cm); | |
| 2492 } | |
| 2493 | |
| 2494 void G1CollectedHeap::register_concurrent_cycle_end() { | |
| 2495 if (_concurrent_cycle_started) { | |
| 2496 _gc_timer_cm->register_gc_end(os::elapsed_counter()); | |
| 2497 | |
| 2498 if (_cm->has_aborted()) { | |
| 2499 _gc_tracer_cm->report_concurrent_mode_failure(); | |
| 2500 } | |
| 2501 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); | |
| 2502 | |
| 2503 _concurrent_cycle_started = false; | |
| 2504 } | |
| 2505 } | |
| 2506 | |
| 2507 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
| 2508 if (_concurrent_cycle_started) { | |
| 2509 trace_heap_after_gc(_gc_tracer_cm); | |
| 2510 } | |
| 2511 } | |
| 2512 | |
| 2513 G1YCType G1CollectedHeap::yc_type() { | |
| 2514 bool is_young = g1_policy()->gcs_are_young(); | |
| 2515 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
| 2516 bool is_during_mark = mark_in_progress(); | |
| 2517 | |
| 2518 if (is_initial_mark) { | |
| 2519 return InitialMark; | |
| 2520 } else if (is_during_mark) { | |
| 2521 return DuringMark; | |
| 2522 } else if (is_young) { | |
| 2523 return Normal; | |
| 2524 } else { | |
| 2525 return Mixed; | |
| 2526 } | |
| 2527 } | |
| 2528 | |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2529 void G1CollectedHeap::collect(GCCause::Cause cause) { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2530 assert_heap_not_locked(); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2531 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2532 unsigned int gc_count_before; |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2533 unsigned int old_marking_count_before; |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2534 bool retry_gc; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
2535 |
|
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|
2536 do { |
|
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|
2537 retry_gc = false; |
|
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|
2538 |
|
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|
2539 { |
|
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|
2540 MutexLocker ml(Heap_lock); |
|
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
2541 |
|
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|
2542 // Read the GC count while holding the Heap_lock |
|
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|
2543 gc_count_before = total_collections(); |
|
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7172388: G1: _total_full_collections should not be incremented for concurrent cycles
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|
2544 old_marking_count_before = _old_marking_cycles_started; |
|
4910
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|
2545 } |
|
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|
2546 |
|
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|
2547 if (should_do_concurrent_full_gc(cause)) { |
|
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|
2548 // Schedule an initial-mark evacuation pause that will start a |
|
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|
2549 // concurrent cycle. We're setting word_size to 0 which means that |
|
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|
2550 // we are not requesting a post-GC allocation. |
|
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|
2551 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2552 0, /* word_size */ |
|
4910
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|
2553 true, /* should_initiate_conc_mark */ |
|
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|
2554 g1_policy()->max_pause_time_ms(), |
|
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|
2555 cause); |
|
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7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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|
2556 |
|
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3fc996d4edd2
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|
2557 VMThread::execute(&op); |
|
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|
2558 if (!op.pause_succeeded()) { |
|
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|
2559 if (old_marking_count_before == _old_marking_cycles_started) { |
|
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|
2560 retry_gc = op.should_retry_gc(); |
|
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|
2561 } else { |
|
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|
2562 // A Full GC happened while we were trying to schedule the |
|
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|
2563 // initial-mark GC. No point in starting a new cycle given |
|
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|
2564 // that the whole heap was collected anyway. |
|
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|
2565 } |
|
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|
2566 |
|
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|
2567 if (retry_gc) { |
|
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|
2568 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
2569 GC_locker::stall_until_clear(); |
|
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|
2570 } |
|
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|
2571 } |
|
4910
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|
2572 } |
|
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|
2573 } else { |
|
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|
2574 if (cause == GCCause::_gc_locker |
|
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|
2575 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
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|
2576 |
|
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|
2577 // Schedule a standard evacuation pause. We're setting word_size |
|
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|
2578 // to 0 which means that we are not requesting a post-GC allocation. |
|
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|
2579 VM_G1IncCollectionPause op(gc_count_before, |
|
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|
2580 0, /* word_size */ |
|
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|
2581 false, /* should_initiate_conc_mark */ |
|
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|
2582 g1_policy()->max_pause_time_ms(), |
|
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|
2583 cause); |
|
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|
2584 VMThread::execute(&op); |
|
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|
2585 } else { |
|
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|
2586 // Schedule a Full GC. |
|
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|
2587 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
|
4910
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|
2588 VMThread::execute(&op); |
|
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|
2589 } |
|
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6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
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|
2590 } |
|
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|
2591 } while (retry_gc); |
| 342 | 2592 } |
| 2593 | |
| 2594 bool G1CollectedHeap::is_in(const void* p) const { | |
| 4708 | 2595 if (_g1_committed.contains(p)) { |
| 2596 // Given that we know that p is in the committed space, | |
| 2597 // heap_region_containing_raw() should successfully | |
| 2598 // return the containing region. | |
| 2599 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2600 return hr->is_in(p); |
| 2601 } else { | |
|
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|
2602 return false; |
| 342 | 2603 } |
| 2604 } | |
| 2605 | |
| 2606 // Iteration functions. | |
| 2607 | |
| 2608 // Iterates an OopClosure over all ref-containing fields of objects | |
| 2609 // within a HeapRegion. | |
| 2610 | |
| 2611 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
| 2612 MemRegion _mr; | |
|
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|
2613 ExtendedOopClosure* _cl; |
| 342 | 2614 public: |
|
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|
2615 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
| 342 | 2616 : _mr(mr), _cl(cl) {} |
| 2617 bool doHeapRegion(HeapRegion* r) { | |
|
6254
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|
2618 if (!r->continuesHumongous()) { |
| 342 | 2619 r->oop_iterate(_cl); |
| 2620 } | |
| 2621 return false; | |
| 2622 } | |
| 2623 }; | |
| 2624 | |
|
6725
da91efe96a93
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|
2625 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
| 342 | 2626 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
| 3766 | 2627 heap_region_iterate(&blk); |
|
6725
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|
2628 } |
|
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|
2629 |
|
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|
2630 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
| 342 | 2631 IterateOopClosureRegionClosure blk(mr, cl); |
| 3766 | 2632 heap_region_iterate(&blk); |
| 342 | 2633 } |
| 2634 | |
| 2635 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2636 | |
| 2637 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2638 ObjectClosure* _cl; | |
| 2639 public: | |
| 2640 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2641 bool doHeapRegion(HeapRegion* r) { | |
| 2642 if (! r->continuesHumongous()) { | |
| 2643 r->object_iterate(_cl); | |
| 2644 } | |
| 2645 return false; | |
| 2646 } | |
| 2647 }; | |
| 2648 | |
|
6725
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|
2649 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
| 342 | 2650 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2651 heap_region_iterate(&blk); |
| 342 | 2652 } |
| 2653 | |
| 2654 // Calls a SpaceClosure on a HeapRegion. | |
| 2655 | |
| 2656 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2657 SpaceClosure* _cl; | |
| 2658 public: | |
| 2659 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2660 bool doHeapRegion(HeapRegion* r) { | |
| 2661 _cl->do_space(r); | |
| 2662 return false; | |
| 2663 } | |
| 2664 }; | |
| 2665 | |
| 2666 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2667 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2668 heap_region_iterate(&blk); |
| 342 | 2669 } |
| 2670 | |
| 3766 | 2671 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
| 2672 _hrs.iterate(cl); | |
| 342 | 2673 } |
| 2674 | |
| 2675 void | |
| 2676 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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|
2677 uint worker_id, |
|
4728
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7121618: Change type of number of GC workers to unsigned int.
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|
2678 uint no_of_par_workers, |
| 342 | 2679 jint claim_value) { |
|
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|
2680 const uint regions = n_regions(); |
|
4728
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|
2681 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
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|
2682 no_of_par_workers : |
|
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|
2683 1); |
|
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|
2684 assert(UseDynamicNumberOfGCThreads || |
|
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|
2685 no_of_par_workers == workers()->total_workers(), |
|
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|
2686 "Non dynamic should use fixed number of workers"); |
| 355 | 2687 // try to spread out the starting points of the workers |
|
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|
2688 const HeapRegion* start_hr = |
|
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|
2689 start_region_for_worker(worker_id, no_of_par_workers); |
|
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|
2690 const uint start_index = start_hr->hrs_index(); |
| 355 | 2691 |
| 2692 // each worker will actually look at all regions | |
|
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|
2693 for (uint count = 0; count < regions; ++count) { |
|
720b6a76dd9d
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|
2694 const uint index = (start_index + count) % regions; |
| 355 | 2695 assert(0 <= index && index < regions, "sanity"); |
| 2696 HeapRegion* r = region_at(index); | |
| 2697 // we'll ignore "continues humongous" regions (we'll process them | |
| 2698 // when we come across their corresponding "start humongous" | |
| 2699 // region) and regions already claimed | |
| 2700 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
| 2701 continue; | |
| 2702 } | |
| 2703 // OK, try to claim it | |
| 342 | 2704 if (r->claimHeapRegion(claim_value)) { |
| 355 | 2705 // success! |
| 2706 assert(!r->continuesHumongous(), "sanity"); | |
| 2707 if (r->startsHumongous()) { | |
| 2708 // If the region is "starts humongous" we'll iterate over its | |
| 2709 // "continues humongous" first; in fact we'll do them | |
| 2710 // first. The order is important. In on case, calling the | |
| 2711 // closure on the "starts humongous" region might de-allocate | |
| 2712 // and clear all its "continues humongous" regions and, as a | |
| 2713 // result, we might end up processing them twice. So, we'll do | |
| 2714 // them first (notice: most closures will ignore them anyway) and | |
| 2715 // then we'll do the "starts humongous" region. | |
|
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|
2716 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
| 355 | 2717 HeapRegion* chr = region_at(ch_index); |
| 2718 | |
| 2719 // if the region has already been claimed or it's not | |
| 2720 // "continues humongous" we're done | |
| 2721 if (chr->claim_value() == claim_value || | |
| 2722 !chr->continuesHumongous()) { | |
| 2723 break; | |
| 2724 } | |
| 2725 | |
| 10405 | 2726 // No one should have claimed it directly. We can given |
| 355 | 2727 // that we claimed its "starts humongous" region. |
| 2728 assert(chr->claim_value() != claim_value, "sanity"); | |
| 2729 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2730 | |
| 2731 if (chr->claimHeapRegion(claim_value)) { | |
| 10405 | 2732 // we should always be able to claim it; no one else should |
| 355 | 2733 // be trying to claim this region |
| 2734 | |
| 2735 bool res2 = cl->doHeapRegion(chr); | |
| 2736 assert(!res2, "Should not abort"); | |
| 2737 | |
| 2738 // Right now, this holds (i.e., no closure that actually | |
| 2739 // does something with "continues humongous" regions | |
| 2740 // clears them). We might have to weaken it in the future, | |
| 2741 // but let's leave these two asserts here for extra safety. | |
| 2742 assert(chr->continuesHumongous(), "should still be the case"); | |
| 2743 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2744 } else { | |
| 2745 guarantee(false, "we should not reach here"); | |
| 2746 } | |
| 2747 } | |
| 2748 } | |
| 2749 | |
| 2750 assert(!r->continuesHumongous(), "sanity"); | |
| 2751 bool res = cl->doHeapRegion(r); | |
| 2752 assert(!res, "Should not abort"); | |
| 2753 } | |
| 2754 } | |
| 2755 } | |
| 2756 | |
| 390 | 2757 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2758 public: | |
| 2759 bool doHeapRegion(HeapRegion* r) { | |
| 2760 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2761 return false; | |
| 2762 } | |
| 2763 }; | |
| 2764 | |
|
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|
2765 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2766 ResetClaimValuesClosure blk; |
| 2767 heap_region_iterate(&blk); | |
| 2768 } | |
| 2769 | |
|
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|
2770 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
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2771 ResetClaimValuesClosure blk; |
|
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2772 collection_set_iterate(&blk); |
|
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|
2773 } |
|
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2774 |
| 355 | 2775 #ifdef ASSERT |
| 2776 // This checks whether all regions in the heap have the correct claim | |
| 2777 // value. I also piggy-backed on this a check to ensure that the | |
| 2778 // humongous_start_region() information on "continues humongous" | |
| 2779 // regions is correct. | |
| 2780 | |
| 2781 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2782 private: | |
| 2783 jint _claim_value; | |
|
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|
2784 uint _failures; |
| 355 | 2785 HeapRegion* _sh_region; |
|
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2786 |
| 355 | 2787 public: |
| 2788 CheckClaimValuesClosure(jint claim_value) : | |
| 2789 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2790 bool doHeapRegion(HeapRegion* r) { | |
| 2791 if (r->claim_value() != _claim_value) { | |
|
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|
2792 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2793 "claim value = %d, should be %d", |
|
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|
2794 HR_FORMAT_PARAMS(r), |
|
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|
2795 r->claim_value(), _claim_value); |
| 355 | 2796 ++_failures; |
| 2797 } | |
| 2798 if (!r->isHumongous()) { | |
| 2799 _sh_region = NULL; | |
| 2800 } else if (r->startsHumongous()) { | |
| 2801 _sh_region = r; | |
| 2802 } else if (r->continuesHumongous()) { | |
| 2803 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2804 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2805 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2806 HR_FORMAT_PARAMS(r), |
| 355 | 2807 r->humongous_start_region(), |
| 2808 _sh_region); | |
| 2809 ++_failures; | |
| 342 | 2810 } |
| 2811 } | |
| 355 | 2812 return false; |
| 2813 } | |
|
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|
2814 uint failures() { return _failures; } |
| 355 | 2815 }; |
| 2816 | |
| 2817 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2818 CheckClaimValuesClosure cl(claim_value); | |
| 2819 heap_region_iterate(&cl); | |
| 2820 return cl.failures() == 0; | |
| 2821 } | |
|
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|
2822 |
|
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|
2823 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
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|
2824 private: |
|
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|
2825 jint _claim_value; |
|
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|
2826 uint _failures; |
|
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|
2827 |
|
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|
2828 public: |
|
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|
2829 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
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|
2830 _claim_value(claim_value), _failures(0) { } |
|
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|
2831 |
|
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|
2832 uint failures() { return _failures; } |
|
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|
2833 |
|
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|
2834 bool doHeapRegion(HeapRegion* hr) { |
|
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|
2835 assert(hr->in_collection_set(), "how?"); |
|
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|
2836 assert(!hr->isHumongous(), "H-region in CSet"); |
|
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|
2837 if (hr->claim_value() != _claim_value) { |
|
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|
2838 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
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|
2839 "claim value = %d, should be %d", |
|
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|
2840 HR_FORMAT_PARAMS(hr), |
|
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|
2841 hr->claim_value(), _claim_value); |
|
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|
2842 _failures += 1; |
|
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|
2843 } |
|
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|
2844 return false; |
|
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|
2845 } |
|
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|
2846 }; |
|
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|
2847 |
|
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|
2848 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
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|
2849 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2850 collection_set_iterate(&cl); |
|
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|
2851 return cl.failures() == 0; |
|
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|
2852 } |
| 355 | 2853 #endif // ASSERT |
| 342 | 2854 |
|
4709
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changeset
|
2855 // Clear the cached CSet starting regions and (more importantly) |
|
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changeset
|
2856 // the time stamps. Called when we reset the GC time stamp. |
|
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|
2857 void G1CollectedHeap::clear_cset_start_regions() { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2858 assert(_worker_cset_start_region != NULL, "sanity"); |
|
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changeset
|
2859 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
fd2b426c30db
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|
2860 |
|
fd2b426c30db
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changeset
|
2861 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2862 for (int i = 0; i < n_queues; i++) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2863 _worker_cset_start_region[i] = NULL; |
|
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changeset
|
2864 _worker_cset_start_region_time_stamp[i] = 0; |
|
fd2b426c30db
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|
2865 } |
|
fd2b426c30db
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changeset
|
2866 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2867 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2868 // Given the id of a worker, obtain or calculate a suitable |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2869 // starting region for iterating over the current collection set. |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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changeset
|
2870 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(int worker_i) { |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2871 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2872 |
|
fd2b426c30db
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changeset
|
2873 HeapRegion* result = NULL; |
|
fd2b426c30db
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changeset
|
2874 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2875 |
|
fd2b426c30db
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changeset
|
2876 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2877 // Cached starting region for current worker was set |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2878 // during the current pause - so it's valid. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2879 // Note: the cached starting heap region may be NULL |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2880 // (when the collection set is empty). |
|
fd2b426c30db
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changeset
|
2881 result = _worker_cset_start_region[worker_i]; |
|
fd2b426c30db
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changeset
|
2882 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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diff
changeset
|
2883 return result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2884 } |
|
fd2b426c30db
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diff
changeset
|
2885 |
|
fd2b426c30db
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diff
changeset
|
2886 // The cached entry was not valid so let's calculate |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2887 // a suitable starting heap region for this worker. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2888 |
|
fd2b426c30db
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diff
changeset
|
2889 // We want the parallel threads to start their collection |
|
fd2b426c30db
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diff
changeset
|
2890 // set iteration at different collection set regions to |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2891 // avoid contention. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2892 // If we have: |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2893 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2894 // p threads |
|
fd2b426c30db
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diff
changeset
|
2895 // Then thread t will start at region floor ((t * n) / p) |
|
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|
2896 |
|
fd2b426c30db
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changeset
|
2897 result = g1_policy()->collection_set(); |
|
4097
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changeset
|
2898 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
2899 uint cs_size = g1_policy()->cset_region_length(); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
2900 uint active_workers = workers()->active_workers(); |
|
4709
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changeset
|
2901 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
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changeset
|
2902 active_workers == workers()->total_workers(), |
|
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|
2903 "Unless dynamic should use total workers"); |
|
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|
2904 |
|
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|
2905 uint end_ind = (cs_size * worker_i) / active_workers; |
|
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|
2906 uint start_ind = 0; |
|
4709
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|
2907 |
|
fd2b426c30db
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changeset
|
2908 if (worker_i > 0 && |
|
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diff
changeset
|
2909 _worker_cset_start_region_time_stamp[worker_i - 1] == gc_time_stamp) { |
|
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|
2910 // Previous workers starting region is valid |
|
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changeset
|
2911 // so let's iterate from there |
|
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changeset
|
2912 start_ind = (cs_size * (worker_i - 1)) / active_workers; |
|
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changeset
|
2913 result = _worker_cset_start_region[worker_i - 1]; |
|
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|
2914 } |
|
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|
2915 |
|
6010
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changeset
|
2916 for (uint i = start_ind; i < end_ind; i++) { |
|
4097
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|
2917 result = result->next_in_collection_set(); |
|
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|
2918 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2919 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2920 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2921 // 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
|
2922 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2923 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
|
2924 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
|
2925 "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
|
2926 _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
|
2927 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2928 _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
|
2929 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2930 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2931 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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diff
changeset
|
2932 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2933 uint no_of_par_workers) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2934 uint worker_num = |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2935 G1CollectedHeap::use_parallel_gc_threads() ? no_of_par_workers : 1U; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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diff
changeset
|
2936 assert(UseDynamicNumberOfGCThreads || |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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diff
changeset
|
2937 no_of_par_workers == workers()->total_workers(), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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|
2938 "Non dynamic should use fixed number of workers"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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diff
changeset
|
2939 const uint start_index = n_regions() * worker_i / worker_num; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2940 return region_at(start_index); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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diff
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|
2941 } |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2942 |
| 342 | 2943 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2944 HeapRegion* r = g1_policy()->collection_set(); | |
| 2945 while (r != NULL) { | |
| 2946 HeapRegion* next = r->next_in_collection_set(); | |
| 2947 if (cl->doHeapRegion(r)) { | |
| 2948 cl->incomplete(); | |
| 2949 return; | |
| 2950 } | |
| 2951 r = next; | |
| 2952 } | |
| 2953 } | |
| 2954 | |
| 2955 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2956 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2957 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2958 // 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
|
2959 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2960 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2961 |
| 342 | 2962 assert(r->in_collection_set(), |
| 2963 "Start region must be a member of the collection set."); | |
| 2964 HeapRegion* cur = r; | |
| 2965 while (cur != NULL) { | |
| 2966 HeapRegion* next = cur->next_in_collection_set(); | |
| 2967 if (cl->doHeapRegion(cur) && false) { | |
| 2968 cl->incomplete(); | |
| 2969 return; | |
| 2970 } | |
| 2971 cur = next; | |
| 2972 } | |
| 2973 cur = g1_policy()->collection_set(); | |
| 2974 while (cur != r) { | |
| 2975 HeapRegion* next = cur->next_in_collection_set(); | |
| 2976 if (cl->doHeapRegion(cur) && false) { | |
| 2977 cl->incomplete(); | |
| 2978 return; | |
| 2979 } | |
| 2980 cur = next; | |
| 2981 } | |
| 2982 } | |
| 2983 | |
| 2984 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
| 3766 | 2985 return n_regions() > 0 ? region_at(0) : NULL; |
| 342 | 2986 } |
| 2987 | |
| 2988 | |
| 2989 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
| 2990 Space* res = heap_region_containing(addr); | |
| 2991 return res; | |
| 2992 } | |
| 2993 | |
| 2994 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2995 Space* sp = space_containing(addr); | |
| 2996 if (sp != NULL) { | |
| 2997 return sp->block_start(addr); | |
| 2998 } | |
| 2999 return NULL; | |
| 3000 } | |
| 3001 | |
| 3002 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 3003 Space* sp = space_containing(addr); | |
| 3004 assert(sp != NULL, "block_size of address outside of heap"); | |
| 3005 return sp->block_size(addr); | |
| 3006 } | |
| 3007 | |
| 3008 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 3009 Space* sp = space_containing(addr); | |
| 3010 return sp->block_is_obj(addr); | |
| 3011 } | |
| 3012 | |
| 3013 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 3014 return true; | |
| 3015 } | |
| 3016 | |
| 3017 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 3018 return HeapRegion::GrainBytes; | |
| 3019 } | |
| 3020 | |
| 3021 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 3022 // Return the remaining space in the cur alloc region, but not less than | |
| 3023 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3024 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3025 // Also, this value can be at most the humongous object threshold, |
| 10405 | 3026 // 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
|
3027 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3028 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3029 HeapRegion* hr = _mutator_alloc_region.get(); |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3030 size_t max_tlab_size = _humongous_object_threshold_in_words * wordSize; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3031 if (hr == NULL) { |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3032 return max_tlab_size; |
| 342 | 3033 } else { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3034 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab_size); |
| 342 | 3035 } |
| 3036 } | |
| 3037 | |
| 3038 size_t G1CollectedHeap::max_capacity() const { | |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
3039 return _g1_reserved.byte_size(); |
| 342 | 3040 } |
| 3041 | |
| 3042 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 3043 // assert(false, "NYI"); | |
| 3044 return 0; | |
| 3045 } | |
| 3046 | |
| 3047 void G1CollectedHeap::prepare_for_verify() { | |
| 3048 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 3049 ensure_parsability(false); | |
| 3050 } | |
| 3051 g1_rem_set()->prepare_for_verify(); | |
| 3052 } | |
| 3053 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3054 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3055 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3056 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3057 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3058 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3059 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3060 return hr->obj_allocated_since_next_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3061 case VerifyOption_G1UseMarkWord: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3062 return false; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3063 default: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3064 ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3065 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3066 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3067 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3068 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3069 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3070 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3071 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
|
3072 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3073 case VerifyOption_G1UseMarkWord: return NULL; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3074 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3075 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3076 return NULL; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3077 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3078 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3079 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3080 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3081 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3082 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3083 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3084 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3085 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3086 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3087 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3088 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3089 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3090 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3091 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3092 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3093 case VerifyOption_G1UseMarkWord: return "NONE"; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3094 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3095 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3096 return NULL; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
3097 } |
|
a2f7274eb6ef
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diff
changeset
|
3098 |
| 12080 | 3099 // TODO: VerifyRootsClosure extends OopsInGenClosure so that we can |
| 3100 // pass it as the perm_blk to SharedHeap::process_strong_roots. | |
| 3101 // When process_strong_roots stop calling perm_blk->younger_refs_iterate | |
| 3102 // we can change this closure to extend the simpler OopClosure. | |
| 3103 class VerifyRootsClosure: public OopsInGenClosure { | |
| 3104 private: | |
| 3105 G1CollectedHeap* _g1h; | |
| 3106 VerifyOption _vo; | |
| 3107 bool _failures; | |
| 3108 public: | |
| 3109 // _vo == UsePrevMarking -> use "prev" marking information, | |
| 3110 // _vo == UseNextMarking -> use "next" marking information, | |
| 3111 // _vo == UseMarkWord -> use mark word from object header. | |
| 3112 VerifyRootsClosure(VerifyOption vo) : | |
| 3113 _g1h(G1CollectedHeap::heap()), | |
| 3114 _vo(vo), | |
| 3115 _failures(false) { } | |
| 3116 | |
| 3117 bool failures() { return _failures; } | |
| 3118 | |
| 3119 template <class T> void do_oop_nv(T* p) { | |
| 3120 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3121 if (!oopDesc::is_null(heap_oop)) { | |
| 3122 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3123 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
| 3124 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
| 3125 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
| 3126 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3127 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
| 3128 } | |
| 3129 obj->print_on(gclog_or_tty); | |
| 3130 _failures = true; | |
| 3131 } | |
| 3132 } | |
| 3133 } | |
| 3134 | |
| 3135 void do_oop(oop* p) { do_oop_nv(p); } | |
| 3136 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 3137 }; | |
| 3138 | |
| 3139 class G1VerifyCodeRootOopClosure: public OopsInGenClosure { | |
| 3140 G1CollectedHeap* _g1h; | |
| 3141 OopClosure* _root_cl; | |
| 3142 nmethod* _nm; | |
| 3143 VerifyOption _vo; | |
| 3144 bool _failures; | |
| 3145 | |
| 3146 template <class T> void do_oop_work(T* p) { | |
| 3147 // First verify that this root is live | |
| 3148 _root_cl->do_oop(p); | |
| 3149 | |
| 3150 if (!G1VerifyHeapRegionCodeRoots) { | |
| 3151 // We're not verifying the code roots attached to heap region. | |
| 3152 return; | |
| 3153 } | |
| 3154 | |
| 3155 // Don't check the code roots during marking verification in a full GC | |
| 3156 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3157 return; | |
| 3158 } | |
| 3159 | |
| 3160 // Now verify that the current nmethod (which contains p) is | |
| 3161 // in the code root list of the heap region containing the | |
| 3162 // object referenced by p. | |
| 3163 | |
| 3164 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3165 if (!oopDesc::is_null(heap_oop)) { | |
| 3166 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3167 | |
| 3168 // Now fetch the region containing the object | |
| 3169 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
| 3170 HeapRegionRemSet* hrrs = hr->rem_set(); | |
| 3171 // Verify that the strong code root list for this region | |
| 3172 // contains the nmethod | |
| 3173 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
| 3174 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
| 3175 "from nmethod "PTR_FORMAT" not in strong " | |
| 3176 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
| 3177 p, _nm, hr->bottom(), hr->end()); | |
| 3178 _failures = true; | |
| 3179 } | |
| 3180 } | |
| 3181 } | |
| 3182 | |
| 3183 public: | |
| 3184 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
| 3185 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
| 3186 | |
| 3187 void do_oop(oop* p) { do_oop_work(p); } | |
| 3188 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 3189 | |
| 3190 void set_nmethod(nmethod* nm) { _nm = nm; } | |
| 3191 bool failures() { return _failures; } | |
| 3192 }; | |
| 3193 | |
| 3194 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
| 3195 G1VerifyCodeRootOopClosure* _oop_cl; | |
| 3196 | |
| 3197 public: | |
| 3198 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
| 3199 _oop_cl(oop_cl) {} | |
| 3200 | |
| 3201 void do_code_blob(CodeBlob* cb) { | |
| 3202 nmethod* nm = cb->as_nmethod_or_null(); | |
| 3203 if (nm != NULL) { | |
| 3204 _oop_cl->set_nmethod(nm); | |
| 3205 nm->oops_do(_oop_cl); | |
| 3206 } | |
| 3207 } | |
| 3208 }; | |
| 3209 | |
| 3210 class YoungRefCounterClosure : public OopClosure { | |
| 3211 G1CollectedHeap* _g1h; | |
| 3212 int _count; | |
| 3213 public: | |
| 3214 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
| 3215 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
| 3216 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 3217 | |
| 3218 int count() { return _count; } | |
| 3219 void reset_count() { _count = 0; }; | |
| 3220 }; | |
| 3221 | |
| 3222 class VerifyKlassClosure: public KlassClosure { | |
| 3223 YoungRefCounterClosure _young_ref_counter_closure; | |
| 3224 OopClosure *_oop_closure; | |
| 3225 public: | |
| 3226 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
| 3227 void do_klass(Klass* k) { | |
| 3228 k->oops_do(_oop_closure); | |
| 3229 | |
| 3230 _young_ref_counter_closure.reset_count(); | |
| 3231 k->oops_do(&_young_ref_counter_closure); | |
| 3232 if (_young_ref_counter_closure.count() > 0) { | |
| 3233 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
| 3234 } | |
| 3235 } | |
| 3236 }; | |
| 3237 | |
| 342 | 3238 class VerifyLivenessOopClosure: public OopClosure { |
|
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3239 G1CollectedHeap* _g1h; |
|
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3240 VerifyOption _vo; |
| 342 | 3241 public: |
|
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3242 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
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3243 _g1h(g1h), _vo(vo) |
|
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3244 { } |
|
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3245 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3246 void do_oop( oop *p) { do_oop_work(p); } |
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3247 |
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3248 template <class T> void do_oop_work(T *p) { |
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3249 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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3250 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
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|
3251 "Dead object referenced by a not dead object"); |
| 342 | 3252 } |
| 3253 }; | |
| 3254 | |
| 3255 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3256 private: |
| 342 | 3257 G1CollectedHeap* _g1h; |
| 3258 size_t _live_bytes; | |
| 3259 HeapRegion *_hr; | |
|
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|
3260 VerifyOption _vo; |
| 342 | 3261 public: |
|
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3262 // _vo == UsePrevMarking -> use "prev" marking information, |
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3263 // _vo == UseNextMarking -> use "next" marking information, |
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3264 // _vo == UseMarkWord -> use mark word from object header. |
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|
3265 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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|
3266 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3267 _g1h = G1CollectedHeap::heap(); |
| 3268 } | |
| 3269 void do_object(oop o) { | |
|
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|
3270 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3271 assert(o != NULL, "Huh?"); |
|
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3272 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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|
3273 // If the object is alive according to the mark word, |
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|
3274 // then verify that the marking information agrees. |
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3275 // Note we can't verify the contra-positive of the |
|
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|
3276 // above: if the object is dead (according to the mark |
|
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3277 // word), it may not be marked, or may have been marked |
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3278 // but has since became dead, or may have been allocated |
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|
3279 // since the last marking. |
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|
3280 if (_vo == VerifyOption_G1UseMarkWord) { |
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|
3281 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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|
3282 } |
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|
3283 |
|
6725
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|
3284 o->oop_iterate_no_header(&isLive); |
|
1389
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|
3285 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
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|
3286 size_t obj_size = o->size(); // Make sure we don't overflow |
|
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|
3287 _live_bytes += (obj_size * HeapWordSize); |
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|
3288 } |
| 342 | 3289 } |
| 3290 } | |
| 3291 size_t live_bytes() { return _live_bytes; } | |
| 3292 }; | |
| 3293 | |
| 3294 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3295 HeapRegion *_hr; | |
| 3296 G1CollectedHeap *_g1; | |
| 3297 public: | |
| 3298 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3299 _g1 = G1CollectedHeap::heap(); | |
| 3300 }; | |
| 3301 | |
| 3302 void do_object(oop o) { | |
| 3303 if (o != NULL) { | |
| 3304 HeapWord *start = (HeapWord *) o; | |
| 3305 size_t word_sz = o->size(); | |
| 3306 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3307 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3308 (void*) o, word_sz, | |
| 3309 _g1->isMarkedPrev(o), | |
| 3310 _g1->isMarkedNext(o), | |
| 3311 _hr->obj_allocated_since_prev_marking(o)); | |
| 3312 HeapWord *end = start + word_sz; | |
| 3313 HeapWord *cur; | |
| 3314 int *val; | |
| 3315 for (cur = start; cur < end; cur++) { | |
| 3316 val = (int *) cur; | |
| 3317 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3318 } | |
| 3319 } | |
| 3320 } | |
| 3321 }; | |
| 3322 | |
| 3323 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3324 private: |
|
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|
3325 bool _par; |
|
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|
3326 VerifyOption _vo; |
|
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|
3327 bool _failures; |
| 811 | 3328 public: |
|
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|
3329 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3330 // _vo == UseNextMarking -> use "next" marking information, |
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|
3331 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3332 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3333 : _par(par), | |
|
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|
3334 _vo(vo), |
|
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|
3335 _failures(false) {} |
|
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|
3336 |
|
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|
3337 bool failures() { |
|
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|
3338 return _failures; |
|
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|
3339 } |
|
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|
3340 |
| 342 | 3341 bool doHeapRegion(HeapRegion* r) { |
|
637
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|
3342 if (!r->continuesHumongous()) { |
|
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|
3343 bool failures = false; |
| 6008 | 3344 r->verify(_vo, &failures); |
|
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|
3345 if (failures) { |
|
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|
3346 _failures = true; |
|
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|
3347 } else { |
|
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|
3348 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
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|
3349 r->object_iterate(¬_dead_yet_cl); |
|
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|
3350 if (_vo != VerifyOption_G1UseNextMarking) { |
|
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|
3351 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
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|
3352 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
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|
3353 "max_live_bytes "SIZE_FORMAT" " |
|
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|
3354 "< calculated "SIZE_FORMAT, |
|
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|
3355 r->bottom(), r->end(), |
|
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|
3356 r->max_live_bytes(), |
|
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|
3357 not_dead_yet_cl.live_bytes()); |
|
4787
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|
3358 _failures = true; |
|
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|
3359 } |
|
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|
3360 } else { |
|
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|
3361 // When vo == UseNextMarking we cannot currently do a sanity |
|
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|
3362 // check on the live bytes as the calculation has not been |
|
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|
3363 // finalized yet. |
|
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|
3364 } |
|
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|
3365 } |
| 342 | 3366 } |
|
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|
3367 return false; // stop the region iteration if we hit a failure |
| 342 | 3368 } |
| 3369 }; | |
| 3370 | |
| 12080 | 3371 // This is the task used for parallel verification of the heap regions |
| 390 | 3372 |
| 3373 class G1ParVerifyTask: public AbstractGangTask { | |
| 3374 private: | |
| 3375 G1CollectedHeap* _g1h; | |
|
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|
3376 VerifyOption _vo; |
|
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|
3377 bool _failures; |
| 390 | 3378 |
| 3379 public: | |
|
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|
3380 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3381 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3382 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3383 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3384 AbstractGangTask("Parallel verify task"), |
|
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|
3385 _g1h(g1h), |
|
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|
3386 _vo(vo), |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3387 _failures(false) { } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3388 |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3389 bool failures() { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3390 return _failures; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3391 } |
| 390 | 3392 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
3393 void work(uint worker_id) { |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3394 HandleMark hm; |
| 6008 | 3395 VerifyRegionClosure blk(true, _vo); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
3396 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
3397 _g1h->workers()->active_workers(), |
| 390 | 3398 HeapRegion::ParVerifyClaimValue); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
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|
3399 if (blk.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3400 _failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3401 } |
| 390 | 3402 } |
| 3403 }; | |
| 3404 | |
| 12080 | 3405 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3406 if (SafepointSynchronize::is_at_safepoint()) { |
| 12080 | 3407 assert(Thread::current()->is_VM_thread(), |
| 3408 "Expected to be executed serially by the VM thread at this point"); | |
| 3409 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3410 if (!silent) { gclog_or_tty->print("Roots "); } |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3411 VerifyRootsClosure rootsCl(vo); |
| 12080 | 3412 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
| 3413 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3414 VerifyKlassClosure klassCl(this, &rootsCl); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
3415 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
3289
diff
changeset
|
3416 // 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
|
3417 // 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
|
3418 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3419 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3420 // 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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6629
diff
changeset
|
3421 ClassLoaderDataGraph::clear_claimed_marks(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3422 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
3289
diff
changeset
|
3423 process_strong_roots(true, // activate StrongRootsScope |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3424 false, // we set "is scavenging" to false, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3425 // so we don't reset the dirty cards. |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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4875
diff
changeset
|
3426 ScanningOption(so), // roots scanning options |
| 342 | 3427 &rootsCl, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
3428 &blobsCl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3429 &klassCl |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3430 ); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3431 |
| 12080 | 3432 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3433 |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3434 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3435 // 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
|
3436 // 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
|
3437 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3438 // the region sets when not in a full GC. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3439 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3440 verify_region_sets(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3441 } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3442 |
| 2152 | 3443 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3444 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3445 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3446 "sanity check"); | |
| 3447 | |
| 6008 | 3448 G1ParVerifyTask task(this, vo); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3449 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3450 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3451 "If not dynamic should be using all the workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3452 int n_workers = workers()->active_workers(); |
| 390 | 3453 set_par_threads(n_workers); |
| 3454 workers()->run_task(&task); | |
| 3455 set_par_threads(0); | |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3456 if (task.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3457 failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3458 } |
| 390 | 3459 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3460 // 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
|
3461 // The implication is that n_workers is > 0. |
| 390 | 3462 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3463 "sanity check"); | |
| 3464 | |
| 3465 reset_heap_region_claim_values(); | |
| 3466 | |
| 3467 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3468 "sanity check"); | |
| 3469 } else { | |
| 6008 | 3470 VerifyRegionClosure blk(false, vo); |
| 3766 | 3471 heap_region_iterate(&blk); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3472 if (blk.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3473 failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3474 } |
| 390 | 3475 } |
| 2152 | 3476 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3477 rem_set()->verify(); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3478 |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3479 if (failures) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3480 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3481 // 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
|
3482 // 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
|
3483 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3484 print_extended_on(gclog_or_tty); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3485 gclog_or_tty->print_cr(""); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3486 #ifndef PRODUCT |
| 1044 | 3487 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3488 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3489 vo, false /* all */); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3490 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3491 #endif |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3492 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3493 } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3494 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3495 } else { |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3496 if (!silent) |
|
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3497 gclog_or_tty->print("(SKIPPING roots, heapRegionSets, heapRegions, remset) "); |
| 342 | 3498 } |
| 3499 } | |
| 3500 | |
| 12080 | 3501 void G1CollectedHeap::verify(bool silent) { |
| 3502 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3503 } | |
| 3504 | |
| 3505 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
| 3506 double verify_time_ms = 0.0; | |
| 3507 | |
| 3508 if (guard && total_collections() >= VerifyGCStartAt) { | |
| 3509 double verify_start = os::elapsedTime(); | |
| 3510 HandleMark hm; // Discard invalid handles created during verification | |
| 3511 prepare_for_verify(); | |
| 3512 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
| 3513 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
| 3514 } | |
| 3515 | |
| 3516 return verify_time_ms; | |
| 3517 } | |
| 3518 | |
| 3519 void G1CollectedHeap::verify_before_gc() { | |
| 3520 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
| 3521 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
| 3522 } | |
| 3523 | |
| 3524 void G1CollectedHeap::verify_after_gc() { | |
| 3525 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
| 3526 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
| 3527 } | |
| 3528 | |
| 342 | 3529 class PrintRegionClosure: public HeapRegionClosure { |
| 3530 outputStream* _st; | |
| 3531 public: | |
| 3532 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3533 bool doHeapRegion(HeapRegion* r) { | |
| 3534 r->print_on(_st); | |
| 3535 return false; | |
| 3536 } | |
| 3537 }; | |
| 3538 | |
| 3539 void G1CollectedHeap::print_on(outputStream* st) const { | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3540 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3541 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
|
3542 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3543 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3544 _g1_storage.low_boundary(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3545 _g1_storage.high(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3546 _g1_storage.high_boundary()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3547 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3548 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
|
3549 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3550 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
|
3551 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3552 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
|
3553 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
|
3554 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3555 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3556 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3557 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3558 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3559 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3560 print_on(st); |
|
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 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3563 st->cr(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3564 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
|
3565 "HS=humongous(starts), HC=humongous(continues), " |
|
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3566 "CS=collection set, F=free, TS=gc time stamp, " |
|
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3567 "PTAMS=previous top-at-mark-start, " |
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3568 "NTAMS=next top-at-mark-start)"); |
| 342 | 3569 PrintRegionClosure blk(st); |
| 3766 | 3570 heap_region_iterate(&blk); |
| 342 | 3571 } |
| 3572 | |
|
9076
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3573 void G1CollectedHeap::print_on_error(outputStream* st) const { |
|
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3574 this->CollectedHeap::print_on_error(st); |
|
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3575 |
|
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|
3576 if (_cm != NULL) { |
|
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|
3577 st->cr(); |
|
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|
3578 _cm->print_on_error(st); |
|
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|
3579 } |
|
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|
3580 } |
|
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|
3581 |
| 342 | 3582 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
1833
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|
3583 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3584 workers()->print_worker_threads_on(st); |
| 3585 } | |
| 3586 _cmThread->print_on(st); | |
| 342 | 3587 st->cr(); |
| 1019 | 3588 _cm->print_worker_threads_on(st); |
| 3589 _cg1r->print_worker_threads_on(st); | |
| 342 | 3590 } |
| 3591 | |
| 3592 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
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|
3593 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3594 workers()->threads_do(tc); |
| 3595 } | |
| 3596 tc->do_thread(_cmThread); | |
| 794 | 3597 _cg1r->threads_do(tc); |
| 342 | 3598 } |
| 3599 | |
| 3600 void G1CollectedHeap::print_tracing_info() const { | |
| 3601 // We'll overload this to mean "trace GC pause statistics." | |
| 3602 if (TraceGen0Time || TraceGen1Time) { | |
| 3603 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3604 // to that. | |
| 3605 g1_policy()->print_tracing_info(); | |
| 3606 } | |
| 751 | 3607 if (G1SummarizeRSetStats) { |
| 342 | 3608 g1_rem_set()->print_summary_info(); |
| 3609 } | |
| 1282 | 3610 if (G1SummarizeConcMark) { |
| 342 | 3611 concurrent_mark()->print_summary_info(); |
| 3612 } | |
| 3613 g1_policy()->print_yg_surv_rate_info(); | |
| 3614 SpecializationStats::print(); | |
| 3615 } | |
| 3616 | |
|
3777
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|
3617 #ifndef PRODUCT |
|
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|
3618 // Helpful for debugging RSet issues. |
|
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|
3619 |
|
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|
3620 class PrintRSetsClosure : public HeapRegionClosure { |
|
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3621 private: |
|
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|
3622 const char* _msg; |
|
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|
3623 size_t _occupied_sum; |
|
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|
3624 |
|
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|
3625 public: |
|
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|
3626 bool doHeapRegion(HeapRegion* r) { |
|
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|
3627 HeapRegionRemSet* hrrs = r->rem_set(); |
|
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3628 size_t occupied = hrrs->occupied(); |
|
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|
3629 _occupied_sum += occupied; |
|
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|
3630 |
|
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|
3631 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
|
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|
3632 HR_FORMAT_PARAMS(r)); |
|
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|
3633 if (occupied == 0) { |
|
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|
3634 gclog_or_tty->print_cr(" RSet is empty"); |
|
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|
3635 } else { |
|
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|
3636 hrrs->print(); |
|
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|
3637 } |
|
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|
3638 gclog_or_tty->print_cr("----------"); |
|
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|
3639 return false; |
|
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|
3640 } |
|
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|
3641 |
|
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|
3642 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
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|
3643 gclog_or_tty->cr(); |
|
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|
3644 gclog_or_tty->print_cr("========================================"); |
|
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|
3645 gclog_or_tty->print_cr(msg); |
|
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|
3646 gclog_or_tty->cr(); |
|
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|
3647 } |
|
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|
3648 |
|
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|
3649 ~PrintRSetsClosure() { |
|
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changeset
|
3650 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
|
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|
3651 gclog_or_tty->print_cr("========================================"); |
|
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|
3652 gclog_or_tty->cr(); |
|
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|
3653 } |
|
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|
3654 }; |
|
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|
3655 |
|
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|
3656 void G1CollectedHeap::print_cset_rsets() { |
|
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changeset
|
3657 PrintRSetsClosure cl("Printing CSet RSets"); |
|
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changeset
|
3658 collection_set_iterate(&cl); |
|
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changeset
|
3659 } |
|
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|
3660 |
|
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changeset
|
3661 void G1CollectedHeap::print_all_rsets() { |
|
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changeset
|
3662 PrintRSetsClosure cl("Printing All RSets");; |
|
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diff
changeset
|
3663 heap_region_iterate(&cl); |
|
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changeset
|
3664 } |
|
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changeset
|
3665 #endif // PRODUCT |
|
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changeset
|
3666 |
| 342 | 3667 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3668 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3669 "not a garbage-first heap"); | |
| 3670 return _g1h; | |
| 3671 } | |
| 3672 | |
| 3673 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
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6904516: More object array barrier fixes, following up on 6906727
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diff
changeset
|
3674 // always_do_update_barrier = false; |
| 342 | 3675 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3676 // Fill TLAB's and such | |
| 3677 ensure_parsability(true); | |
| 3678 } | |
| 3679 | |
| 3680 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
|
10372
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|
3681 |
|
e72f7eecc96d
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diff
changeset
|
3682 if (G1SummarizeRSetStats && |
|
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|
3683 (G1SummarizeRSetStatsPeriod > 0) && |
|
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changeset
|
3684 // we are at the end of the GC. Total collections has already been increased. |
|
e72f7eecc96d
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diff
changeset
|
3685 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
|
e72f7eecc96d
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diff
changeset
|
3686 g1_rem_set()->print_periodic_summary_info(); |
|
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changeset
|
3687 } |
|
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diff
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|
3688 |
| 342 | 3689 // FIXME: what is this about? |
| 3690 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3691 // is set. | |
| 3692 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3693 "derived pointer present")); | |
|
1245
6484c4ee11cb
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diff
changeset
|
3694 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3695 |
|
4dfb2df418f2
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3973
diff
changeset
|
3696 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
3697 // policy with the new heap occupancy |
|
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changeset
|
3698 Universe::update_heap_info_at_gc(); |
| 342 | 3699 } |
| 3700 | |
| 1973 | 3701 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3702 unsigned int gc_count_before, | |
|
12113
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|
3703 bool* succeeded, |
|
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changeset
|
3704 GCCause::Cause gc_cause) { |
| 1973 | 3705 assert_heap_not_locked_and_not_at_safepoint(); |
| 342 | 3706 g1_policy()->record_stop_world_start(); |
| 1973 | 3707 VM_G1IncCollectionPause op(gc_count_before, |
| 3708 word_size, | |
| 3709 false, /* should_initiate_conc_mark */ | |
| 3710 g1_policy()->max_pause_time_ms(), | |
|
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|
3711 gc_cause); |
| 1973 | 3712 VMThread::execute(&op); |
| 3713 | |
| 3714 HeapWord* result = op.result(); | |
| 3715 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3716 assert(result == NULL || ret_succeeded, | |
| 3717 "the result should be NULL if the VM did not succeed"); | |
| 3718 *succeeded = ret_succeeded; | |
| 3719 | |
| 3720 assert_heap_not_locked(); | |
| 3721 return result; | |
| 342 | 3722 } |
| 3723 | |
| 3724 void | |
| 3725 G1CollectedHeap::doConcurrentMark() { | |
|
845
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|
3726 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
|
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|
3727 if (!_cmThread->in_progress()) { |
|
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|
3728 _cmThread->set_started(); |
|
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changeset
|
3729 CGC_lock->notify(); |
| 342 | 3730 } |
| 3731 } | |
| 3732 | |
| 3733 size_t G1CollectedHeap::pending_card_num() { | |
| 3734 size_t extra_cards = 0; | |
| 3735 JavaThread *curr = Threads::first(); | |
| 3736 while (curr != NULL) { | |
| 3737 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3738 extra_cards += dcq.size(); | |
| 3739 curr = curr->next(); | |
| 3740 } | |
| 3741 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3742 size_t buffer_size = dcqs.buffer_size(); | |
| 3743 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3744 |
| 3745 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3746 // in bytes - not the number of 'entries'. We need to convert | |
| 3747 // into a number of cards. | |
| 3748 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3749 } |
| 3750 | |
| 3751 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3752 return g1_rem_set()->cardsScanned(); |
| 342 | 3753 } |
| 3754 | |
| 3755 void | |
| 3756 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
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|
3757 assert(_surviving_young_words == NULL, "pre-condition"); |
|
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|
3758 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3759 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3760 if (_surviving_young_words == NULL) { |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3761 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
| 342 | 3762 "Not enough space for young surv words summary."); |
| 3763 } | |
|
6010
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changeset
|
3764 memset(_surviving_young_words, 0, (size_t) array_length * sizeof(size_t)); |
|
845
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|
3765 #ifdef ASSERT |
|
6010
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diff
changeset
|
3766 for (uint i = 0; i < array_length; ++i) { |
|
845
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|
3767 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
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changeset
|
3768 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3769 #endif // !ASSERT |
| 342 | 3770 } |
| 3771 | |
| 3772 void | |
| 3773 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3774 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
|
3775 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
|
3776 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3777 _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
|
3778 } |
| 342 | 3779 } |
| 3780 | |
| 3781 void | |
| 3782 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3783 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3784 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3785 _surviving_young_words = NULL; |
| 3786 } | |
| 3787 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3788 #ifdef ASSERT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3789 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3790 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3791 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3792 // 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
|
3793 // 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
|
3794 // 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
|
3795 // 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
|
3796 // 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
|
3797 // 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
|
3798 // 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
|
3799 // 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
|
3800 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3801 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
|
3802 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3803 // 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
|
3804 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3805 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3806 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3807 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3808 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3809 |
| 1709 | 3810 #if TASKQUEUE_STATS |
| 3811 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3812 st->print_raw_cr("GC Task Stats"); | |
| 3813 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3814 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3815 } | |
| 3816 | |
| 3817 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3818 print_taskqueue_stats_hdr(st); | |
| 3819 | |
| 3820 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3821 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3822 for (int i = 0; i < n; ++i) { |
| 3823 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3824 totals += task_queue(i)->stats; | |
| 3825 } | |
| 3826 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3827 | |
| 3828 DEBUG_ONLY(totals.verify()); | |
| 3829 } | |
| 3830 | |
| 3831 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
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 task_queue(i)->stats.reset(); | |
| 3835 } | |
| 3836 } | |
| 3837 #endif // TASKQUEUE_STATS | |
| 3838 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3839 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3840 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3841 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3842 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3843 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3844 gclog_or_tty->date_stamp(PrintGCDateStamps); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3845 gclog_or_tty->stamp(PrintGCTimeStamps); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3846 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3847 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
|
3848 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3849 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3850 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3851 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3852 } |
|
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 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3855 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3856 return; |
|
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 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3859 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3860 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3861 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3862 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3863 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
|
3864 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3865 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3866 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3867 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3868 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3869 gclog_or_tty->print("--"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3870 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3871 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3872 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
|
3873 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3874 gclog_or_tty->flush(); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3875 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3876 |
| 1973 | 3877 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3878 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3879 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3880 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3881 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3882 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3883 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3884 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3885 |
| 10405 | 3886 _gc_timer_stw->register_gc_start(os::elapsed_counter()); |
| 3887 | |
| 3888 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
| 3889 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3890 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3891 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3892 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3893 print_heap_before_gc(); |
| 10405 | 3894 trace_heap_before_gc(_gc_tracer_stw); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3895 |
| 4072 | 3896 HRSPhaseSetter x(HRSPhaseEvacuation); |
| 2152 | 3897 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3898 verify_dirty_young_regions(); |
| 2152 | 3899 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3900 // 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
|
3901 // 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
|
3902 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3903 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3904 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3905 // 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
|
3906 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3907 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3908 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3909 // 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
|
3910 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
|
3911 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3912 // 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
|
3913 // 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
|
3914 // 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
|
3915 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
|
3916 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3917 // 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
|
3918 { |
| 10405 | 3919 EvacuationInfo evacuation_info; |
| 3920 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3921 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3922 // 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
|
3923 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3924 increment_old_marking_cycles_started(); |
| 10405 | 3925 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
|
3926 } |
| 10405 | 3927 |
| 3928 _gc_tracer_stw->report_yc_type(yc_type()); | |
| 3929 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3930 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3931 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3932 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
|
3933 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
|
3934 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
|
3935 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3936 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3937 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3938 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3939 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3940 |
| 2361 | 3941 // If the secondary_free_list is not empty, append it to the |
| 3942 // free_list. No need to wait for the cleanup operation to finish; | |
| 3943 // the region allocation code will check the secondary_free_list | |
| 3944 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3945 // set, skip this step so that the region allocation code has to | |
| 3946 // get entries from the secondary_free_list. | |
| 2152 | 3947 if (!G1StressConcRegionFreeing) { |
| 2361 | 3948 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3949 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3950 |
| 12080 | 3951 assert(check_young_list_well_formed(), "young list should be well formed"); |
| 3952 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3953 "sanity check"); | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3954 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3955 // 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
|
3956 // 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
|
3957 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3958 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3959 { // 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
|
3960 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3961 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3962 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3963 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
|
3964 increment_gc_time_stamp(); |
| 342 | 3965 |
|
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
|
3966 verify_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3967 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3968 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3969 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3970 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3971 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3972 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3973 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3974 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3975 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3976 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3977 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3978 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3979 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3980 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3981 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3982 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3983 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3984 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3985 // 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
|
3986 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3987 release_mutator_alloc_region(); |
|
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 should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3990 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3991 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3992 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3993 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3994 // 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
|
3995 // 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
|
3996 // 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
|
3997 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3998 // 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
|
3999 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4000 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4001 // 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
|
4002 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4003 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4004 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4005 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4006 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4007 g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4008 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4009 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4010 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
|
4011 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4012 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4013 // 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
|
4014 // 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
|
4015 // 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
|
4016 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4017 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
|
4018 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4019 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4020 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
|
4021 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
|
4022 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4023 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
|
4024 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4025 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4027 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4028 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4029 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4030 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4033 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4034 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4035 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4036 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 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
|
4038 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4039 |
| 10405 | 4040 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4042 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4043 // 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
|
4044 // 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
|
4045 // 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
|
4046 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4047 _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
|
4048 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4049 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4050 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4051 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4052 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4053 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4054 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4055 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4056 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4057 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4058 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4059 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4060 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4061 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4062 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4063 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4065 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4066 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4067 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4068 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4069 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4070 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4071 #endif // ASSERT |
| 1707 | 4072 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4073 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4074 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4075 // Initialize the GC alloc regions. |
| 10405 | 4076 init_gc_alloc_regions(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4077 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4078 // Actually do the work... |
| 10405 | 4079 evacuate_collection_set(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4080 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4081 // 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
|
4082 // (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
|
4083 // 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
|
4084 // 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
|
4085 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4086 _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
|
4087 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4088 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4089 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4090 |
| 10405 | 4091 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4092 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4093 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4094 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4095 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4096 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4097 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4098 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4099 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4100 // regions to the incremental collection set for the next |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4101 // evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 clear_cset_fast_test(); |
|
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 _young_list->reset_sampled_info(); |
|
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 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4107 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4108 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4109 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4110 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4111 "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
|
4112 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4113 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4114 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4115 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4116 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4117 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4118 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
| 10405 | 4119 _young_list->first_survivor_region(), |
| 4120 _young_list->last_survivor_region()); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4121 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 _summary_bytes_used = recalculate_used(); |
| 10405 | 4126 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
| 4127 for (uint i = 0; i < n_queues; i++) { | |
| 4128 if (_evacuation_failed_info_array[i].has_failed()) { | |
| 4129 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
| 4130 } | |
| 4131 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4132 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4133 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4134 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4135 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4136 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4137 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4138 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4139 // 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
|
4140 // 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
|
4141 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4142 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4143 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4144 // 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
|
4145 // 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
|
4146 // the current thread has completed its logging output. |
|
3979
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 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4149 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4150 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4151 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4152 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 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
|
4155 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4156 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 init_mutator_alloc_region(); |
|
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 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4160 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 size_t bytes_before = capacity(); |
| 4785 | 4163 // No need for an ergo verbose message here, |
| 4164 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4165 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4171 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4172 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4173 |
| 10405 | 4174 // 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
|
4175 // 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
|
4176 _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
|
4177 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4178 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4179 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4180 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4181 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4182 // 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
|
4183 // 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
|
4184 // 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
|
4185 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
|
4186 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
| 10405 | 4187 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
|
4188 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4189 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4190 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4191 // 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
|
4192 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4193 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4194 // 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
|
4195 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4196 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4197 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4198 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4199 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4200 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4201 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4202 // 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
|
4203 // 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
|
4204 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4205 // 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
|
4206 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4207 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4208 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4209 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4210 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4211 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4212 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4213 |
|
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
|
4214 verify_after_gc(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4215 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4216 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4217 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4218 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4219 // 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
|
4220 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4221 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4222 // 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
|
4223 // 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
|
4224 // 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
|
4225 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4226 _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
|
4227 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4228 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4229 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4230 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4231 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4232 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4233 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4234 #endif |
| 342 | 4235 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4236 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4237 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4238 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4239 // 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
|
4240 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
|
4241 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4242 // 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
|
4243 // 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
|
4244 // 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
|
4245 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4246 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4247 _hrs.verify_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4248 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4249 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4250 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
|
4251 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4252 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4253 print_heap_after_gc(); |
| 10405 | 4254 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
|
4255 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4256 // 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
|
4257 // 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
|
4258 // 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
|
4259 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4260 g1mm()->update_sizes(); |
| 10405 | 4261 |
| 4262 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
| 4263 _gc_tracer_stw->report_tenuring_threshold(_g1_policy->tenuring_threshold()); | |
| 4264 _gc_timer_stw->register_gc_end(os::elapsed_counter()); | |
| 4265 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); | |
| 4266 } | |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4267 // 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
|
4268 // 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
|
4269 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4270 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4271 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4272 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4273 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4274 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4275 // 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
|
4276 // 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
|
4277 // 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
|
4278 // ConcurrentGCThread::safepoint_desynchronize(). |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4279 doConcurrentMark(); |
|
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 |
| 1973 | 4282 return true; |
| 342 | 4283 } |
| 4284 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4285 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4286 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4287 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4288 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4289 case GCAllocForSurvived: |
| 6595 | 4290 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4291 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4292 case GCAllocForTenured: |
| 6595 | 4293 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4294 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4295 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4296 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4297 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4298 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4299 } |
| 6595 | 4300 |
| 4301 // Prevent humongous PLAB sizes for two reasons: | |
| 4302 // * PLABs are allocated using a similar paths as oops, but should | |
| 4303 // never be in a humongous region | |
| 4304 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4305 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
|
4306 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4307 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4308 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4309 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4310 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4311 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4312 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4313 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4314 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4315 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
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|
4316 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
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diff
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|
4317 |
| 10405 | 4318 void G1CollectedHeap::init_gc_alloc_regions(EvacuationInfo& evacuation_info) { |
|
3830
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|
4319 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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|
4320 |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
4321 _survivor_gc_alloc_region.init(); |
|
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changeset
|
4322 _old_gc_alloc_region.init(); |
|
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diff
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|
4323 HeapRegion* retained_region = _retained_old_gc_alloc_region; |
|
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diff
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|
4324 _retained_old_gc_alloc_region = NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
4325 |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
4326 // We will discard the current GC alloc region if: |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
4327 // a) it's in the collection set (it can happen!), |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
4328 // b) it's already full (no point in using it), |
|
f44782f04dd4
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parents:
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diff
changeset
|
4329 // c) it's empty (this means that it was emptied during |
|
f44782f04dd4
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diff
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|
4330 // a cleanup and it should be on the free list now), or |
|
f44782f04dd4
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diff
changeset
|
4331 // d) it's humongous (this means that it was emptied |
|
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diff
changeset
|
4332 // during a cleanup and was added to the free list, but |
| 10405 | 4333 // has been subsequently used to allocate a humongous |
|
3830
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
4334 // object that may be less than the region size). |
|
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diff
changeset
|
4335 if (retained_region != NULL && |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
4336 !retained_region->in_collection_set() && |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
4337 !(retained_region->top() == retained_region->end()) && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
4338 !retained_region->is_empty() && |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
4339 !retained_region->isHumongous()) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
4340 retained_region->set_saved_mark(); |
| 4072 | 4341 // The retained region was added to the old region set when it was |
| 4342 // retired. We have to remove it now, since we don't allow regions | |
| 4343 // we allocate to in the region sets. We'll re-add it later, when | |
| 4344 // it's retired again. | |
| 4345 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4346 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4347 retained_region->note_start_of_copying(during_im); |
|
3830
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
4348 _old_gc_alloc_region.set(retained_region); |
|
f44782f04dd4
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changeset
|
4349 _hr_printer.reuse(retained_region); |
| 10405 | 4350 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
| 4351 } | |
| 4352 } | |
| 4353 | |
| 4354 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { | |
| 4355 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
| 4356 _old_gc_alloc_region.count()); | |
|
3830
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|
4357 _survivor_gc_alloc_region.release(); |
|
f44782f04dd4
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diff
changeset
|
4358 // If we have an old GC alloc region to release, we'll save it in |
|
f44782f04dd4
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tonyp
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diff
changeset
|
4359 // _retained_old_gc_alloc_region. If we don't |
|
f44782f04dd4
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parents:
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diff
changeset
|
4360 // _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:
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diff
changeset
|
4361 // 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:
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diff
changeset
|
4362 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4363 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 6595 | 4364 |
| 4365 if (ResizePLAB) { | |
| 6819 | 4366 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
| 4367 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
| 6595 | 4368 } |
| 342 | 4369 } |
| 4370 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
4371 void G1CollectedHeap::abandon_gc_alloc_regions() { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4372 assert(_survivor_gc_alloc_region.get() == NULL, "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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diff
changeset
|
4373 assert(_old_gc_alloc_region.get() == NULL, "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
4374 _retained_old_gc_alloc_region = NULL; |
| 342 | 4375 } |
| 4376 | |
| 4377 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4378 _drain_in_progress = false; | |
| 4379 set_evac_failure_closure(cl); | |
| 6197 | 4380 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4381 } |
| 4382 | |
| 4383 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4384 assert(_evac_failure_scan_stack != NULL && | |
| 4385 _evac_failure_scan_stack->length() == 0, | |
| 4386 "Postcondition"); | |
| 4387 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4388 delete _evac_failure_scan_stack; |
| 342 | 4389 _evac_failure_scan_stack = NULL; |
| 4390 } | |
| 4391 | |
| 4392 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
|
4393 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
|
4394 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4395 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4396 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4397 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4398 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4399 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4400 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4401 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4402 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4403 } |
|
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 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
|
4406 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4407 // 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
|
4408 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4409 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4410 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4411 |
| 4412 // 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
|
4413 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
|
4414 _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
|
4415 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
|
4416 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
|
4417 markOop m = _preserved_marks_of_objs.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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7455
diff
changeset
|
4418 obj->set_mark(m); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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7455
diff
changeset
|
4419 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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7455
diff
changeset
|
4420 _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
|
4421 _preserved_marks_of_objs.clear(true); |
| 342 | 4422 } |
| 4423 | |
| 4424 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4425 _evac_failure_scan_stack->push(obj); | |
| 4426 } | |
| 4427 | |
| 4428 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4429 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4430 | |
| 4431 while (_evac_failure_scan_stack->length() > 0) { | |
| 4432 oop obj = _evac_failure_scan_stack->pop(); | |
| 4433 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4434 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4435 } | |
| 4436 } | |
| 4437 | |
| 4438 oop | |
| 10405 | 4439 G1CollectedHeap::handle_evacuation_failure_par(G1ParScanThreadState* _par_scan_state, |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4440 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
|
4441 assert(obj_in_cs(old), |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
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3317
diff
changeset
|
4442 err_msg("obj: "PTR_FORMAT" should still be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
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3317
diff
changeset
|
4443 (HeapWord*) old)); |
| 342 | 4444 markOop m = old->mark(); |
| 4445 oop forward_ptr = old->forward_to_atomic(old); | |
| 4446 if (forward_ptr == NULL) { | |
| 4447 // Forward-to-self succeeded. | |
| 10405 | 4448 assert(_par_scan_state != NULL, "par scan state"); |
| 4449 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
| 4450 uint queue_num = _par_scan_state->queue_num(); | |
| 4451 | |
| 4452 _evacuation_failed = true; | |
| 4453 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
| 342 | 4454 if (_evac_failure_closure != cl) { |
| 4455 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4456 assert(!_drain_in_progress, | |
| 4457 "Should only be true while someone holds the lock."); | |
| 4458 // Set the global evac-failure closure to the current thread's. | |
| 4459 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4460 set_evac_failure_closure(cl); | |
| 4461 // Now do the common part. | |
| 4462 handle_evacuation_failure_common(old, m); | |
| 4463 // Reset to NULL. | |
| 4464 set_evac_failure_closure(NULL); | |
| 4465 } else { | |
| 4466 // The lock is already held, and this is recursive. | |
| 4467 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4468 handle_evacuation_failure_common(old, m); | |
| 4469 } | |
| 4470 return old; | |
| 4471 } else { | |
|
3323
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
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3317
diff
changeset
|
4472 // 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
|
4473 // 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
|
4474 // 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
|
4475 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
|
4476 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
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3317
diff
changeset
|
4477 "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
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3317
diff
changeset
|
4478 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4479 return forward_ptr; |
| 4480 } | |
| 4481 } | |
| 4482 | |
| 4483 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4484 preserve_mark_if_necessary(old, m); | |
| 4485 | |
| 4486 HeapRegion* r = heap_region_containing(old); | |
| 4487 if (!r->evacuation_failed()) { | |
| 4488 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4489 _hr_printer.evac_failure(r); |
| 342 | 4490 } |
| 4491 | |
| 4492 push_on_evac_failure_scan_stack(old); | |
| 4493 | |
| 4494 if (!_drain_in_progress) { | |
| 4495 // prevent recursion in copy_to_survivor_space() | |
| 4496 _drain_in_progress = true; | |
| 4497 drain_evac_failure_scan_stack(); | |
| 4498 _drain_in_progress = false; | |
| 4499 } | |
| 4500 } | |
| 4501 | |
| 4502 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
|
4503 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4504 // 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
|
4505 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4506 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
|
4507 _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
|
4508 _preserved_marks_of_objs.push(m); |
| 342 | 4509 } |
| 4510 } | |
| 4511 | |
| 4512 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4513 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4514 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4515 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
|
4516 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4517 return result; |
| 342 | 4518 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4519 // 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
|
4520 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4521 return old_attempt_allocation(word_size); |
| 342 | 4522 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4523 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4524 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4525 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
|
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 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
|
4530 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4531 return survivor_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 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4534 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4535 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4536 // 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
|
4537 return NULL; |
| 342 | 4538 } |
| 4539 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4540 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
|
4541 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4542 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4543 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num) |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4544 : _g1h(g1h), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4545 _refs(g1h->task_queue(queue_num)), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4546 _dcq(&g1h->dirty_card_queue_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4547 _ct_bs((CardTableModRefBS*)_g1h->barrier_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4548 _g1_rem(g1h->g1_rem_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4549 _hash_seed(17), _queue_num(queue_num), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4550 _term_attempts(0), |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4551 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4552 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4553 _age_table(false), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4554 _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
|
4555 _alloc_buffer_waste(0), _undo_waste(0) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4556 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4557 // 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
|
4558 // non-young regions (where the age is -1) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4559 // 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
|
4560 // an attempt to eliminate cache contention |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4561 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
|
4562 uint array_length = PADDING_ELEM_NUM + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4563 real_length + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4564 PADDING_ELEM_NUM; |
| 6197 | 4565 _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
|
4566 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
|
4567 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
|
4568 "Not enough space for young surv histo."); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4569 _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
|
4570 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
|
4571 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4572 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4573 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4574 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4575 _start = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4576 } |
| 342 | 4577 |
| 1709 | 4578 void |
| 4579 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
| 4580 { | |
| 4581 st->print_raw_cr("GC Termination Stats"); | |
| 4582 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
| 4583 " ------waste (KiB)------"); | |
| 4584 st->print_raw_cr("thr ms ms % ms % attempts" | |
| 4585 " total alloc undo"); | |
| 4586 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
| 4587 " ------- ------- -------"); | |
| 4588 } | |
| 4589 | |
| 4590 void | |
| 4591 G1ParScanThreadState::print_termination_stats(int i, | |
| 4592 outputStream* const st) const | |
| 4593 { | |
| 4594 const double elapsed_ms = elapsed_time() * 1000.0; | |
| 4595 const double s_roots_ms = strong_roots_time() * 1000.0; | |
| 4596 const double term_ms = term_time() * 1000.0; | |
| 4597 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
| 4598 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
| 4599 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
| 4600 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
| 4601 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
| 4602 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
| 4603 alloc_buffer_waste() * HeapWordSize / K, | |
| 4604 undo_waste() * HeapWordSize / K); | |
| 4605 } | |
| 4606 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4607 #ifdef ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4608 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4609 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4610 assert(UseCompressedOops, "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4611 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4612 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4613 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4614 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4615 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4616 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4617 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4618 bool G1ParScanThreadState::verify_ref(oop* 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 if (has_partial_array_mask(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4621 // Must be in the collection set--it's already been copied. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4622 oop p = clear_partial_array_mask(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4623 assert(_g1h->obj_in_cs(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4624 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4625 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4626 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4627 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4628 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4629 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4630 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4631 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4632 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4633 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4634 if (ref.is_narrow()) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4635 return verify_ref((narrowOop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4636 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4637 return verify_ref((oop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4638 } |
|
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 #endif // ASSERT |
|
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 void G1ParScanThreadState::trim_queue() { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4643 assert(_evac_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4644 assert(_evac_failure_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4645 assert(_partial_scan_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4646 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4647 StarTask ref; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4648 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4649 // Drain the overflow stack first, so other threads can steal. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
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diff
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|
4650 while (refs()->pop_overflow(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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1861
diff
changeset
|
4651 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
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|
4652 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
4653 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
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|
4654 while (refs()->pop_local(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4655 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4656 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
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parents:
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diff
changeset
|
4657 } while (!refs()->is_empty()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4658 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
changeset
|
4659 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4660 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
|
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
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|
4661 G1ParScanThreadState* par_scan_state) : |
| 342 | 4662 _g1(g1), _g1_rem(_g1->g1_rem_set()), _cm(_g1->concurrent_mark()), |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
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|
4663 _par_scan_state(par_scan_state), |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4664 _worker_id(par_scan_state->queue_num()), |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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parents:
3869
diff
changeset
|
4665 _during_initial_mark(_g1->g1_policy()->during_initial_mark_pause()), |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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diff
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|
4666 _mark_in_progress(_g1->mark_in_progress()) { } |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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diff
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|
4667 |
| 5987 | 4668 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4669 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object>::mark_object(oop obj) { | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4670 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4671 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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|
4672 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
4673 assert(!hr->in_collection_set(), "should not mark objects in the CSet"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4674 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4675 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
4676 // 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
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diff
changeset
|
4677 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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|
4678 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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diff
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|
4679 |
| 5987 | 4680 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4681 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> | |
| 4682 ::mark_forwarded_object(oop from_obj, oop to_obj) { | |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
4683 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4684 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
|
4685 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
|
4686 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
|
4687 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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diff
changeset
|
4688 HeapRegion* from_hr = _g1->heap_region_containing(from_obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
4689 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4690 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
|
4691 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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diff
changeset
|
4692 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
|
4693 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4694 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
|
4695 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4696 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4697 // 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
|
4698 // 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
|
4699 // 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
|
4700 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4701 _cm->grayRoot(to_obj, (size_t) from_obj->size(), _worker_id); |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
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|
4702 } |
|
2ace1c4ee8da
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parents:
4785
diff
changeset
|
4703 |
| 5987 | 4704 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4705 oop G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> | |
| 4706 ::copy_to_survivor_space(oop old) { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4707 size_t word_sz = old->size(); |
| 342 | 4708 HeapRegion* from_region = _g1->heap_region_containing_raw(old); |
| 4709 // +1 to make the -1 indexes valid... | |
| 4710 int young_index = from_region->young_index_in_cset()+1; | |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4711 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
|
4712 (!from_region->is_young() && young_index == 0), "invariant" ); |
| 342 | 4713 G1CollectorPolicy* g1p = _g1->g1_policy(); |
| 4714 markOop m = old->mark(); | |
| 545 | 4715 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
| 4716 : m->age(); | |
| 4717 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
| 342 | 4718 word_sz); |
| 4719 HeapWord* obj_ptr = _par_scan_state->allocate(alloc_purpose, word_sz); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4720 #ifndef PRODUCT |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4721 // Should this evacuation fail? |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4722 if (_g1->evacuation_should_fail()) { |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4723 if (obj_ptr != NULL) { |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4724 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4725 obj_ptr = NULL; |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4726 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4727 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4728 #endif // !PRODUCT |
| 342 | 4729 |
| 4730 if (obj_ptr == NULL) { | |
| 4731 // This will either forward-to-self, or detect that someone else has | |
| 4732 // installed a forwarding pointer. | |
| 10405 | 4733 return _g1->handle_evacuation_failure_par(_par_scan_state, old); |
| 342 | 4734 } |
| 4735 | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4736 oop obj = oop(obj_ptr); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4737 |
| 526 | 4738 // We're going to allocate linearly, so might as well prefetch ahead. |
| 4739 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
| 4740 | |
| 342 | 4741 oop forward_ptr = old->forward_to_atomic(obj); |
| 4742 if (forward_ptr == NULL) { | |
| 4743 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
| 526 | 4744 if (g1p->track_object_age(alloc_purpose)) { |
| 4745 // We could simply do obj->incr_age(). However, this causes a | |
| 4746 // performance issue. obj->incr_age() will first check whether | |
| 4747 // the object has a displaced mark by checking its mark word; | |
| 4748 // getting the mark word from the new location of the object | |
| 4749 // stalls. So, given that we already have the mark word and we | |
| 4750 // are about to install it anyway, it's better to increase the | |
| 4751 // age on the mark word, when the object does not have a | |
| 4752 // displaced mark word. We're not expecting many objects to have | |
| 4753 // a displaced marked word, so that case is not optimized | |
| 4754 // further (it could be...) and we simply call obj->incr_age(). | |
| 4755 | |
| 4756 if (m->has_displaced_mark_helper()) { | |
| 4757 // in this case, we have to install the mark word first, | |
| 4758 // otherwise obj looks to be forwarded (the old mark word, | |
| 4759 // which contains the forward pointer, was copied) | |
| 4760 obj->set_mark(m); | |
| 4761 obj->incr_age(); | |
| 4762 } else { | |
| 4763 m = m->incr_age(); | |
| 545 | 4764 obj->set_mark(m); |
| 526 | 4765 } |
| 545 | 4766 _par_scan_state->age_table()->add(obj, word_sz); |
| 4767 } else { | |
| 4768 obj->set_mark(m); | |
| 526 | 4769 } |
| 4770 | |
| 342 | 4771 size_t* surv_young_words = _par_scan_state->surviving_young_words(); |
| 4772 surv_young_words[young_index] += word_sz; | |
| 4773 | |
| 4774 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
|
4775 // 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
|
4776 // 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
|
4777 // 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
|
4778 arrayOop(obj)->set_length(0); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4779 oop* old_p = set_partial_array_mask(old); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4780 _par_scan_state->push_on_queue(old_p); |
| 342 | 4781 } else { |
| 526 | 4782 // No point in using the slower heap_region_containing() method, |
| 4783 // given that we know obj is in the heap. | |
| 5987 | 4784 _scanner.set_region(_g1->heap_region_containing_raw(obj)); |
| 4785 obj->oop_iterate_backwards(&_scanner); | |
| 342 | 4786 } |
| 4787 } else { | |
| 4788 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); | |
| 4789 obj = forward_ptr; | |
| 4790 } | |
| 4791 return obj; | |
| 4792 } | |
| 4793 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4794 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4795 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
|
4796 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
|
4797 _scanned_klass->record_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4798 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4799 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4800 |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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3869
diff
changeset
|
4801 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
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|
4802 template <class T> |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
johnc
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3869
diff
changeset
|
4803 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
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|
4804 ::do_oop_work(T* p) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4805 oop obj = oopDesc::load_decode_heap_oop(p); |
| 342 | 4806 assert(barrier != G1BarrierRS || obj != NULL, |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4807 "Precondition: G1BarrierRS implies obj is non-NULL"); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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3869
diff
changeset
|
4808 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4809 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4810 |
| 526 | 4811 // here the null check is implicit in the cset_fast_test() test |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4812 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
|
4813 oop forwardee; |
| 526 | 4814 if (obj->is_forwarded()) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4815 forwardee = obj->forwardee(); |
| 526 | 4816 } else { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4817 forwardee = copy_to_survivor_space(obj); |
| 342 | 4818 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4819 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
|
4820 oopDesc::encode_store_heap_oop(p, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4821 if (do_mark_object && forwardee != obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4822 // 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
|
4823 // 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
|
4824 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4825 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4826 |
| 526 | 4827 // When scanning the RS, we only care about objs in CS. |
| 4828 if (barrier == G1BarrierRS) { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4829 _par_scan_state->update_rs(_from, p, _worker_id); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4830 } else if (barrier == G1BarrierKlass) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4831 do_klass_barrier(p, forwardee); |
| 342 | 4832 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4833 } else { |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4834 // 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
|
4835 // 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
|
4836 // be true) then attempt to mark the object. |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4837 if (do_mark_object && _g1->is_in_g1_reserved(obj)) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4838 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4839 } |
| 526 | 4840 } |
| 4841 | |
| 4842 if (barrier == G1BarrierEvac && obj != NULL) { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4843 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4844 } |
| 4845 | |
| 4846 if (do_gen_barrier && obj != NULL) { | |
| 4847 par_do_barrier(p); | |
| 4848 } | |
| 4849 } | |
| 4850 | |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4851 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(oop* p); |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4852 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4853 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4854 template <class T> void G1ParScanPartialArrayClosure::do_oop_nv(T* p) { |
| 526 | 4855 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
|
4856 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
|
4857 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4858 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
|
4859 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
|
4860 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
|
4861 // 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
|
4862 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
|
4863 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4864 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
|
4865 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
|
4866 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
|
4867 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
|
4868 // 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
|
4869 // to-space object. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4870 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
|
4871 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
|
4872 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
|
4873 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4874 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
|
4875 int end = length; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4876 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
|
4877 // We'll try not to push a range that's smaller than ParGCArrayScanChunk. |
| 342 | 4878 if (remainder > 2 * ParGCArrayScanChunk) { |
| 4879 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
|
4880 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
|
4881 // 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
|
4882 // 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
|
4883 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
|
4884 _par_scan_state->push_on_queue(from_obj_p); |
| 342 | 4885 } else { |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4886 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
|
4887 // 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
|
4888 // 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
|
4889 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
|
4890 } |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4891 _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
|
4892 // 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
|
4893 // 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
|
4894 // 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
|
4895 // 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
|
4896 // 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
|
4897 // 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
|
4898 // 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
|
4899 // 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
|
4900 to_obj_array->oop_iterate_range(&_scanner, start, end); |
| 342 | 4901 } |
| 4902 | |
| 4903 class G1ParEvacuateFollowersClosure : public VoidClosure { | |
| 4904 protected: | |
| 4905 G1CollectedHeap* _g1h; | |
| 4906 G1ParScanThreadState* _par_scan_state; | |
| 4907 RefToScanQueueSet* _queues; | |
| 4908 ParallelTaskTerminator* _terminator; | |
| 4909 | |
| 4910 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4911 RefToScanQueueSet* queues() { return _queues; } | |
| 4912 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4913 | |
| 4914 public: | |
| 4915 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4916 G1ParScanThreadState* par_scan_state, | |
| 4917 RefToScanQueueSet* queues, | |
| 4918 ParallelTaskTerminator* terminator) | |
| 4919 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4920 _queues(queues), _terminator(terminator) {} | |
| 4921 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4922 void do_void(); |
|
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 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4925 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4926 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4927 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4928 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4929 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4930 pss->start_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4931 const bool res = terminator()->offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4932 pss->end_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4933 return res; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4934 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4935 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4936 void G1ParEvacuateFollowersClosure::do_void() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4937 StarTask stolen_task; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4938 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4939 pss->trim_queue(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4940 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4941 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4942 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4943 assert(pss->verify_task(stolen_task), "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4944 if (stolen_task.is_narrow()) { |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4945 pss->deal_with_reference((narrowOop*) stolen_task); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4946 } else { |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4947 pss->deal_with_reference((oop*) stolen_task); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4948 } |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4949 |
|
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4950 // We've just processed a reference and we might have made |
|
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4951 // available new entries on the queues. So we have to make sure |
|
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4952 // we drain the queues as necessary. |
| 342 | 4953 pss->trim_queue(); |
| 4954 } | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4955 } while (!offer_termination()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4956 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4957 pss->retire_alloc_buffers(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4958 } |
| 342 | 4959 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4960 class G1KlassScanClosure : public KlassClosure { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4961 G1ParCopyHelper* _closure; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4962 bool _process_only_dirty; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4963 int _count; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4964 public: |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4965 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4966 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4967 void do_klass(Klass* klass) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4968 // If the klass has not been dirtied we know that there's |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
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|
4969 // no references into the young gen and we can skip it. |
|
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|
4970 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
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|
4971 // Clean the klass since we're going to scavenge all the metadata. |
|
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6964458: Reimplement class meta-data storage to use native memory
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|
4972 klass->clear_modified_oops(); |
|
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|
4973 |
|
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|
4974 // Tell the closure that this klass is the Klass to scavenge |
|
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|
4975 // and is the one to dirty if oops are left pointing into the young gen. |
|
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|
4976 _closure->set_scanned_klass(klass); |
|
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|
4977 |
|
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|
4978 klass->oops_do(_closure); |
|
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|
4979 |
|
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|
4980 _closure->set_scanned_klass(NULL); |
|
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|
4981 } |
|
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|
4982 _count++; |
|
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|
4983 } |
|
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|
4984 }; |
|
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|
4985 |
| 342 | 4986 class G1ParTask : public AbstractGangTask { |
| 4987 protected: | |
| 4988 G1CollectedHeap* _g1h; | |
| 4989 RefToScanQueueSet *_queues; | |
| 4990 ParallelTaskTerminator _terminator; | |
|
4728
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|
4991 uint _n_workers; |
| 342 | 4992 |
| 4993 Mutex _stats_lock; | |
| 4994 Mutex* stats_lock() { return &_stats_lock; } | |
| 4995 | |
| 4996 size_t getNCards() { | |
| 4997 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 4998 / G1BlockOffsetSharedArray::N_bytes; | |
| 4999 } | |
| 5000 | |
| 5001 public: | |
|
4095
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|
5002 G1ParTask(G1CollectedHeap* g1h, |
|
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|
5003 RefToScanQueueSet *task_queues) |
| 342 | 5004 : AbstractGangTask("G1 collection"), |
| 5005 _g1h(g1h), | |
| 5006 _queues(task_queues), | |
|
4095
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|
5007 _terminator(0, _queues), |
|
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|
5008 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 5009 {} |
| 5010 | |
| 5011 RefToScanQueueSet* queues() { return _queues; } | |
| 5012 | |
| 5013 RefToScanQueue *work_queue(int i) { | |
| 5014 return queues()->queue(i); | |
| 5015 } | |
| 5016 | |
|
4095
bca17e38de00
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|
5017 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
bca17e38de00
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|
5018 |
|
bca17e38de00
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|
5019 virtual void set_for_termination(int active_workers) { |
|
bca17e38de00
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|
5020 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
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|
5021 // in the young space (_par_seq_tasks) in the G1 heap |
|
bca17e38de00
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|
5022 // for SequentialSubTasksDone. |
|
bca17e38de00
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|
5023 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
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|
5024 // both of which need setting by set_n_termination(). |
|
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|
5025 _g1h->SharedHeap::set_n_termination(active_workers); |
|
bca17e38de00
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|
5026 _g1h->set_n_termination(active_workers); |
|
bca17e38de00
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|
5027 terminator()->reset_for_reuse(active_workers); |
|
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|
5028 _n_workers = active_workers; |
|
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diff
changeset
|
5029 } |
|
bca17e38de00
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diff
changeset
|
5030 |
|
4728
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|
5031 void work(uint worker_id) { |
|
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changeset
|
5032 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 5033 |
| 5034 double start_time_ms = os::elapsedTime() * 1000.0; | |
|
6219
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|
5035 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 5036 |
|
5986
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|
5037 { |
|
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diff
changeset
|
5038 ResourceMark rm; |
|
500023bd0818
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changeset
|
5039 HandleMark hm; |
|
500023bd0818
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|
5040 |
|
500023bd0818
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changeset
|
5041 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
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|
5042 |
|
500023bd0818
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|
5043 G1ParScanThreadState pss(_g1h, worker_id); |
|
500023bd0818
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|
5044 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, rp); |
|
500023bd0818
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|
5045 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
500023bd0818
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|
5046 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, rp); |
|
500023bd0818
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|
5047 |
|
500023bd0818
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changeset
|
5048 pss.set_evac_closure(&scan_evac_cl); |
|
500023bd0818
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diff
changeset
|
5049 pss.set_evac_failure_closure(&evac_failure_cl); |
|
500023bd0818
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diff
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|
5050 pss.set_partial_scan_closure(&partial_scan_cl); |
|
500023bd0818
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|
5051 |
|
500023bd0818
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diff
changeset
|
5052 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
|
6725
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|
5053 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
|
5986
500023bd0818
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|
5054 |
|
500023bd0818
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diff
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|
5055 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
|
6725
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|
5056 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
|
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|
5057 |
|
da91efe96a93
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changeset
|
5058 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
da91efe96a93
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coleenp
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|
5059 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
|
da91efe96a93
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coleenp
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|
5060 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
|
5986
500023bd0818
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diff
changeset
|
5061 |
|
500023bd0818
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diff
changeset
|
5062 OopClosure* scan_root_cl = &only_scan_root_cl; |
|
6725
da91efe96a93
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|
5063 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
|
5986
500023bd0818
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diff
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|
5064 |
|
500023bd0818
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diff
changeset
|
5065 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
500023bd0818
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diff
changeset
|
5066 // We also need to mark copied objects. |
|
500023bd0818
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5963
diff
changeset
|
5067 scan_root_cl = &scan_mark_root_cl; |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
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changeset
|
5068 scan_klasses_cl = &scan_mark_klasses_cl_s; |
|
5986
500023bd0818
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parents:
5963
diff
changeset
|
5069 } |
|
500023bd0818
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5963
diff
changeset
|
5070 |
|
500023bd0818
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parents:
5963
diff
changeset
|
5071 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
500023bd0818
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diff
changeset
|
5072 |
| 12080 | 5073 // Don't scan the scavengable methods in the code cache as part |
| 5074 // of strong root scanning. The code roots that point into a | |
| 5075 // region in the collection set are scanned when we scan the | |
| 5076 // region's RSet. | |
| 5077 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; | |
|
6725
da91efe96a93
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coleenp
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diff
changeset
|
5078 |
|
5986
500023bd0818
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diff
changeset
|
5079 pss.start_strong_roots(); |
|
6725
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changeset
|
5080 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
|
da91efe96a93
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|
5081 SharedHeap::ScanningOption(so), |
|
5986
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diff
changeset
|
5082 scan_root_cl, |
|
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5963
diff
changeset
|
5083 &push_heap_rs_cl, |
|
6725
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changeset
|
5084 scan_klasses_cl, |
|
5986
500023bd0818
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diff
changeset
|
5085 worker_id); |
|
500023bd0818
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5963
diff
changeset
|
5086 pss.end_strong_roots(); |
|
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diff
changeset
|
5087 |
|
500023bd0818
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5963
diff
changeset
|
5088 { |
|
500023bd0818
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5963
diff
changeset
|
5089 double start = os::elapsedTime(); |
|
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diff
changeset
|
5090 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
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diff
changeset
|
5091 evac.do_void(); |
|
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diff
changeset
|
5092 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
|
500023bd0818
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diff
changeset
|
5093 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
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6611
diff
changeset
|
5094 _g1h->g1_policy()->phase_times()->add_obj_copy_time(worker_id, elapsed_ms-term_ms); |
|
6219
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|
5095 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
|
5986
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diff
changeset
|
5096 } |
|
500023bd0818
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diff
changeset
|
5097 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
|
500023bd0818
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diff
changeset
|
5098 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
|
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diff
changeset
|
5099 |
|
500023bd0818
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diff
changeset
|
5100 if (ParallelGCVerbose) { |
|
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diff
changeset
|
5101 MutexLocker x(stats_lock()); |
|
500023bd0818
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diff
changeset
|
5102 pss.print_termination_stats(worker_id); |
|
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diff
changeset
|
5103 } |
|
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changeset
|
5104 |
|
500023bd0818
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diff
changeset
|
5105 assert(pss.refs()->is_empty(), "should be empty"); |
|
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diff
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|
5106 |
|
500023bd0818
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diff
changeset
|
5107 // Close the inner scope so that the ResourceMark and HandleMark |
|
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changeset
|
5108 // destructors are executed here and are included as part of the |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5109 // "GC Worker Time". |
| 342 | 5110 } |
| 5111 | |
| 1611 | 5112 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
|
5113 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 5114 } |
| 5115 }; | |
| 5116 | |
| 5117 // *** Common G1 Evacuation Stuff | |
| 5118 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5119 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5120 |
| 342 | 5121 void |
| 5122 G1CollectedHeap:: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5123 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
|
5124 ScanningOption so, |
| 342 | 5125 OopClosure* scan_non_heap_roots, |
| 5126 OopsInHeapRegionClosure* scan_rs, | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5127 G1KlassScanClosure* scan_klasses, |
| 342 | 5128 int worker_i) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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3973
diff
changeset
|
5129 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
5130 // First scan the strong roots |
| 342 | 5131 double ext_roots_start = os::elapsedTime(); |
| 5132 double closure_app_time_sec = 0.0; | |
| 5133 | |
| 5134 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
| 5135 | |
| 12080 | 5136 assert(so & SO_CodeCache || scan_rs != NULL, "must scan code roots somehow"); |
| 5137 // Walk the code cache/strong code roots w/o buffering, because StarTask | |
| 5138 // cannot handle unaligned oop locations. | |
| 5139 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
|
5140 |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5141 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
|
5142 is_scavenging, so, |
| 342 | 5143 &buf_scan_non_heap_roots, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5144 &eager_scan_code_roots, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5145 scan_klasses |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5146 ); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5147 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5148 // 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
|
5149 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
|
5150 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5151 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5152 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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diff
changeset
|
5153 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5154 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
|
5155 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5156 |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5157 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 5158 buf_scan_non_heap_roots.done(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5159 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5160 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
|
5161 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5162 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
|
5163 |
| 342 | 5164 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
|
5165 ((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
|
5166 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5167 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 5168 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5169 // 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
|
5170 // 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
|
5171 // 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
|
5172 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5173 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
|
5174 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
|
5175 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
|
5176 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5177 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
|
5178 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5179 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
|
5180 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5181 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5182 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 5183 |
| 12080 | 5184 // If this is an initial mark pause, and we're not scanning |
| 5185 // the entire code cache, we need to mark the oops in the | |
| 5186 // strong code root lists for the regions that are not in | |
| 5187 // the collection set. | |
| 5188 // Note all threads participate in this set of root tasks. | |
| 5189 double mark_strong_code_roots_ms = 0.0; | |
| 5190 if (g1_policy()->during_initial_mark_pause() && !(so & SO_CodeCache)) { | |
| 5191 double mark_strong_roots_start = os::elapsedTime(); | |
| 5192 mark_strong_code_roots(worker_i); | |
| 5193 mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; | |
| 5194 } | |
| 5195 g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); | |
| 5196 | |
| 342 | 5197 // Now scan the complement of the collection set. |
| 5198 if (scan_rs != NULL) { | |
| 12080 | 5199 g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
| 342 | 5200 } |
| 5201 _process_strong_tasks->all_tasks_completed(); | |
| 5202 } | |
| 5203 | |
| 5204 void | |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5205 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
|
5206 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5207 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
| 342 | 5208 } |
| 5209 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5210 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5211 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5212 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5213 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5214 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5215 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5216 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5217 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5218 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5219 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5220 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5221 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5222 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5223 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5224 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5225 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5226 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5227 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5228 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5229 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5230 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5231 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5232 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5233 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5234 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5235 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5236 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5237 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5238 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5239 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5240 void do_oop( oop* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5241 oop obj = *p; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5242 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5243 if (_g1->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5244 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5245 *p = obj->forwardee(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5246 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5247 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5248 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5249 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5250 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5251 // serial and parallel code as long as different worker |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5252 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5253 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5254 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5255 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5256 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5257 OopClosure* _copy_non_heap_obj_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5258 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5259 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5260 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5261 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5262 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
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|
5263 OopClosure* non_heap_obj_cl, |
|
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|
5264 OopsInHeapRegionClosure* metadata_obj_cl, |
|
3979
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|
5265 G1ParScanThreadState* pss): |
|
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changeset
|
5266 _g1h(g1h), |
|
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changeset
|
5267 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
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|
5268 _copy_metadata_obj_cl(metadata_obj_cl), |
|
3979
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changeset
|
5269 _par_scan_state(pss) |
|
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changeset
|
5270 {} |
|
4dfb2df418f2
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diff
changeset
|
5271 |
|
4dfb2df418f2
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diff
changeset
|
5272 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
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changeset
|
5273 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
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changeset
|
5274 |
|
4dfb2df418f2
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changeset
|
5275 template <class T> void do_oop_work(T* p) { |
|
4dfb2df418f2
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changeset
|
5276 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
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changeset
|
5277 |
|
4dfb2df418f2
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diff
changeset
|
5278 if (_g1h->obj_in_cs(obj)) { |
|
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changeset
|
5279 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
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changeset
|
5280 // to a new location or to itself in the event of an |
|
4dfb2df418f2
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changeset
|
5281 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
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changeset
|
5282 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
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changeset
|
5283 // heap, update the RSet for the referent. |
|
4dfb2df418f2
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changeset
|
5284 // |
|
4dfb2df418f2
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changeset
|
5285 // If the referent has not been forwarded then we have to keep |
|
4dfb2df418f2
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changeset
|
5286 // it alive by policy. Therefore we have copy the referent. |
|
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changeset
|
5287 // |
|
4dfb2df418f2
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changeset
|
5288 // If the reference field is in the G1 heap then we can push |
|
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changeset
|
5289 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
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changeset
|
5290 // phase of reference processing) the object and it's followers |
|
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changeset
|
5291 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
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changeset
|
5292 // new location, and the RSet updated. Otherwise we need to |
|
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changeset
|
5293 // use the the non-heap or metadata closures directly to copy |
| 10405 | 5294 // the referent object and update the pointer, while avoiding |
|
3979
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changeset
|
5295 // updating the RSet. |
|
4dfb2df418f2
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diff
changeset
|
5296 |
|
4dfb2df418f2
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diff
changeset
|
5297 if (_g1h->is_in_g1_reserved(p)) { |
|
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changeset
|
5298 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
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changeset
|
5299 } else { |
|
6725
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changeset
|
5300 assert(!ClassLoaderDataGraph::contains((address)p), |
|
da91efe96a93
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changeset
|
5301 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
|
da91efe96a93
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|
5302 PTR_FORMAT, p)); |
|
3979
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changeset
|
5303 _copy_non_heap_obj_cl->do_oop(p); |
|
4dfb2df418f2
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parents:
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changeset
|
5304 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5305 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5306 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5307 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5308 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5309 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
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changeset
|
5310 // closure for each discovered list in some of the |
|
4dfb2df418f2
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changeset
|
5311 // reference processing phases. |
|
4dfb2df418f2
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diff
changeset
|
5312 |
|
4dfb2df418f2
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changeset
|
5313 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
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parents:
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changeset
|
5314 protected: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5315 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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changeset
|
5316 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
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parents:
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changeset
|
5317 |
|
4dfb2df418f2
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diff
changeset
|
5318 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
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parents:
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changeset
|
5319 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5320 public: |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5321 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5322 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5323 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5324 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5325 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5326 void do_void() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5327 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5328 pss->trim_queue(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5329 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5330 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5331 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5332 // Parallel Reference Processing closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5333 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5334 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5335 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5336 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5337 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5338 private: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5339 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5340 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5341 FlexibleWorkGang* _workers; |
|
3979
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5342 int _active_workers; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5343 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5345 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5346 FlexibleWorkGang* workers, |
|
3979
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5347 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 int n_workers) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 _workers(workers), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 _active_workers(n_workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5354 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5355 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5356 |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5357 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5358 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5359 virtual void execute(EnqueueTask& task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5360 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5361 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5362 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5363 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5364 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5365 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5366 ProcessTask& _proc_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5367 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5368 RefToScanQueueSet *_task_queues; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5369 ParallelTaskTerminator* _terminator; |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5370 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 public: |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5372 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5373 G1CollectedHeap* g1h, |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5374 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
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diff
changeset
|
5375 ParallelTaskTerminator* terminator) : |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5376 AbstractGangTask("Process reference objects in parallel"), |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5377 _proc_task(proc_task), |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5378 _g1h(g1h), |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5379 _task_queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5380 _terminator(terminator) |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5381 {} |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5382 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5383 virtual void work(uint worker_id) { |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5384 // The reference processing task executed by a single worker. |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5385 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5386 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5387 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5388 G1STWIsAliveClosure is_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5389 |
|
4728
441e946dc1af
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|
5390 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
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changeset
|
5391 |
|
4dfb2df418f2
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diff
changeset
|
5392 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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changeset
|
5393 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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changeset
|
5394 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
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changeset
|
5395 |
|
4dfb2df418f2
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diff
changeset
|
5396 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
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parents:
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changeset
|
5397 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5398 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
5399 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5400 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
5401 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
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changeset
|
5402 |
|
4dfb2df418f2
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diff
changeset
|
5403 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
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6629
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changeset
|
5404 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
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changeset
|
5405 |
|
4dfb2df418f2
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diff
changeset
|
5406 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
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changeset
|
5407 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
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changeset
|
5408 |
|
4dfb2df418f2
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diff
changeset
|
5409 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
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parents:
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|
5410 // We also need to mark copied objects. |
|
4dfb2df418f2
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diff
changeset
|
5411 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
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|
5412 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
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changeset
|
5413 } |
|
4dfb2df418f2
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diff
changeset
|
5414 |
|
4dfb2df418f2
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changeset
|
5415 // Keep alive closure. |
|
6725
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|
5416 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
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|
5417 |
|
4dfb2df418f2
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diff
changeset
|
5418 // Complete GC closure |
|
4dfb2df418f2
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changeset
|
5419 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
4dfb2df418f2
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changeset
|
5420 |
|
4dfb2df418f2
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diff
changeset
|
5421 // Call the reference processing task's work routine. |
|
4728
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|
5422 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
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changeset
|
5423 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5424 // Note we cannot assert that the refs array is empty here as not all |
|
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changeset
|
5425 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
4dfb2df418f2
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|
5426 // 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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changeset
|
5427 // the queue may not be empty. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5428 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5429 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5430 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5431 // Driver routine for parallel reference processing. |
|
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parents:
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diff
changeset
|
5432 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5433 // task and has the worker threads execute it. |
|
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parents:
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changeset
|
5434 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
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parents:
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changeset
|
5435 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5436 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5437 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5438 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
5439 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5440 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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diff
changeset
|
5441 _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
|
5442 _g1h->set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5443 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5444 |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5445 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5446 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5447 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5448 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5449 EnqueueTask& _enq_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5450 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5451 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5452 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5453 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 _enq_task(enq_task) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5455 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5456 |
|
4728
441e946dc1af
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jmasa
parents:
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diff
changeset
|
5457 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
|
5458 _enq_task.work(worker_id); |
|
3979
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johnc
parents:
3973
diff
changeset
|
5459 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5460 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5461 |
| 10405 | 5462 // Driver routine for parallel reference enqueueing. |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5463 // Creates an instance of the ref enqueueing gang |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5464 // task and has the worker threads execute it. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5465 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5466 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5467 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5468 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5469 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5470 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5471 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5472 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5473 _g1h->set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5474 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5475 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5476 // End of weak reference support closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5477 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5478 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5479 // 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
|
5480 // objects discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5481 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5482 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5483 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5484 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5485 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5486 ParallelTaskTerminator _terminator; |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5487 uint _n_workers; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5488 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5489 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5490 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5491 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5492 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5493 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5494 _terminator(workers, _queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5495 _n_workers(workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5496 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5497 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5498 void work(uint worker_id) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5499 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5500 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5501 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5502 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5503 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5504 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5505 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5506 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5507 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5508 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5509 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5510 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5511 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5512 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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diff
changeset
|
5513 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5514 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
|
5515 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
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diff
changeset
|
5516 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5517 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5518 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5519 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5520 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
|
5521 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5522 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5523 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5524 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5525 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
5526 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5527 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5528 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5529 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5530 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5531 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5532 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5533 // to be copied. |
|
6725
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coleenp
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6629
diff
changeset
|
5534 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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changeset
|
5535 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5536 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5537 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5538 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
|
5539 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
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|
5540 |
|
4dfb2df418f2
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diff
changeset
|
5541 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
|
4dfb2df418f2
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|
5542 // So this must be true - but assert just in case someone decides to |
|
4dfb2df418f2
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changeset
|
5543 // change the worker ids. |
|
4728
441e946dc1af
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jmasa
parents:
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diff
changeset
|
5544 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5545 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5546 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5547 // Select discovered lists [i, i+stride, i+2*stride,...,limit) |
|
4728
441e946dc1af
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jmasa
parents:
4711
diff
changeset
|
5548 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5549 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5550 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5551 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5552 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5553 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5554 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5555 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5556 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5557 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5558 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5559 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5560 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5561 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5562 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5563 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5564 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5565 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5566 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5567 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5568 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5569 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5570 assert(pss.refs()->is_empty(), "should be"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5571 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5572 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5573 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5574 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5575 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5576 double ref_proc_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5577 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5578 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5579 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5580 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5581 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5582 // 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
|
5583 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5584 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5585 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5586 // 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
|
5587 // 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
|
5588 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5589 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5590 // but would not have treated the reference object as a regular oop. |
| 10405 | 5591 // 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
|
5592 // referent object. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5593 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5594 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5595 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5596 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5597 // 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
|
5598 // 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
|
5599 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5600 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5601 |
| 4711 | 5602 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5603 no_of_gc_workers == workers()->active_workers(), |
| 5604 "Need to reset active GC workers"); | |
| 5605 | |
| 5606 set_par_threads(no_of_gc_workers); | |
| 5607 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5608 no_of_gc_workers, | |
| 5609 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5610 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5611 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5612 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5613 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5614 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5615 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5616 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5617 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5618 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5619 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5620 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5621 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5622 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5623 // of JNI refs is serial and performed serially by the current thread |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5624 // 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
|
5625 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5626 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5627 // Use only a single queue for this PSS. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5628 G1ParScanThreadState pss(this, 0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5629 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5630 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5631 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5632 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5633 G1ParScanHeapEvacClosure scan_evac_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5634 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5635 G1ParScanPartialArrayClosure partial_scan_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5636 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5637 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5638 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5639 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5640 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5641 assert(pss.refs()->is_empty(), "pre-condition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5642 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5643 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
|
5644 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5645 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5646 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
|
5647 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5648 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5649 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
|
5650 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5651 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5652 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5653 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5654 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
|
5655 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5656 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5657 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5658 // Keep alive closure. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5659 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
|
5660 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5661 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5662 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5663 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5665 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5666 |
| 10405 | 5667 ReferenceProcessorStats stats; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5668 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5669 // Serial reference processing... |
| 10405 | 5670 stats = rp->process_discovered_references(&is_alive, |
| 5671 &keep_alive, | |
| 5672 &drain_queue, | |
| 5673 NULL, | |
| 5674 _gc_timer_stw); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5675 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5676 // Parallel reference processing |
| 6819 | 5677 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5678 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5679 | |
| 5680 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
| 10405 | 5681 stats = rp->process_discovered_references(&is_alive, |
| 5682 &keep_alive, | |
| 5683 &drain_queue, | |
| 5684 &par_task_executor, | |
| 5685 _gc_timer_stw); | |
| 5686 } | |
| 5687 | |
| 5688 _gc_tracer_stw->report_gc_reference_stats(stats); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5689 // We have completed copying any necessary live referent objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5690 // (that were not copied during the actual pause) so we can |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5691 // retire any active alloc buffers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 pss.retire_alloc_buffers(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5693 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
|
5694 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5695 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
|
5696 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
|
5697 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5698 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5699 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5700 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5701 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 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
|
5705 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5710 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5711 } else { |
| 10405 | 5712 // Parallel reference enqueueing |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5713 |
| 6819 | 5714 assert(no_of_gc_workers == workers()->active_workers(), |
| 5715 "Need to reset active workers"); | |
| 5716 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5717 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5718 | |
| 5719 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
|
5720 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5721 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5727 // 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
|
5728 // Should we do that here also? We could, but it is a serial operation |
| 10405 | 5729 // and could significantly increase the pause time. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5730 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5731 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
|
5732 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
|
5733 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 |
| 10405 | 5735 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
|
5736 _expand_heap_after_alloc_failure = true; |
| 10405 | 5737 _evacuation_failed = false; |
| 342 | 5738 |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5739 // 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
|
5740 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
|
5741 |
| 342 | 5742 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
|
5743 |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5744 // Disable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5745 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
|
5746 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
|
5747 hot_card_cache->set_use_cache(false); |
| 889 | 5748 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5749 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5750 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5751 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5752 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5753 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5754 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5755 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5756 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5757 "If not dynamic should be using all the workers"); |
| 4711 | 5758 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5759 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5760 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5761 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5762 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5763 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5764 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5765 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5766 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5767 |
| 5768 init_for_evac_failure(NULL); | |
| 5769 | |
| 5770 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
|
5771 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5772 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
|
5773 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5774 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5775 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5776 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5777 StrongRootsScope srs(this); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5778 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5779 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5780 // 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
|
5781 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5782 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5783 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5784 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5785 "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
|
5786 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5787 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5788 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
|
5789 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5790 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5791 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5792 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5793 // 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
|
5794 // 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
|
5795 // 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
|
5796 // 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
|
5797 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5798 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5799 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5800 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
|
5801 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
|
5802 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5803 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5804 (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
|
5805 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
|
5806 |
| 342 | 5807 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5808 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5809 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5810 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5811 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5812 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5813 // not copied during the pause. |
| 6819 | 5814 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5815 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5816 // Weak root processing. |
| 342 | 5817 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5818 G1STWIsAliveClosure is_alive(this); |
| 342 | 5819 G1KeepAliveClosure keep_alive(this); |
| 5820 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 5821 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5822 |
| 10405 | 5823 release_gc_alloc_regions(n_workers, evacuation_info); |
| 342 | 5824 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
|
5825 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5826 // 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
|
5827 // 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
|
5828 // 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
|
5829 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
|
5830 hot_card_cache->set_use_cache(true); |
| 342 | 5831 |
| 12080 | 5832 // Migrate the strong code roots attached to each region in |
| 5833 // the collection set. Ideally we would like to do this | |
| 5834 // after we have finished the scanning/evacuation of the | |
| 5835 // strong code roots for a particular heap region. | |
| 5836 migrate_strong_code_roots(); | |
| 5837 | |
| 5838 if (g1_policy()->during_initial_mark_pause()) { | |
| 5839 // Reset the claim values set during marking the strong code roots | |
| 5840 reset_heap_region_claim_values(); | |
| 5841 } | |
| 5842 | |
| 342 | 5843 finalize_for_evac_failure(); |
| 5844 | |
| 5845 if (evacuation_failed()) { | |
| 5846 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5847 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5848 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5849 // 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
|
5850 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5851 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 5852 } |
| 5853 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5854 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5855 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5856 // this after the card table is cleaned (and verified) as |
| 10405 | 5857 // the act of enqueueing entries on to the pending list |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5858 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5859 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5860 // RSets. |
| 6819 | 5861 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5862 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5863 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5864 RedirtyLoggedCardTableEntryFastClosure redirty; |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5865 dirty_card_queue_set().set_closure(&redirty); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5866 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
| 1111 | 5867 |
| 5868 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); | |
| 5869 dcq.merge_bufferlists(&dirty_card_queue_set()); | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5870 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5871 } |
| 342 | 5872 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5873 } | |
| 5874 | |
| 2173 | 5875 void G1CollectedHeap::free_region_if_empty(HeapRegion* hr, |
| 2152 | 5876 size_t* pre_used, |
| 5877 FreeRegionList* free_list, | |
| 4072 | 5878 OldRegionSet* old_proxy_set, |
| 2152 | 5879 HumongousRegionSet* humongous_proxy_set, |
| 2173 | 5880 HRRSCleanupTask* hrrs_cleanup_task, |
| 2152 | 5881 bool par) { |
| 5882 if (hr->used() > 0 && hr->max_live_bytes() == 0 && !hr->is_young()) { | |
| 5883 if (hr->isHumongous()) { | |
| 5884 assert(hr->startsHumongous(), "we should only see starts humongous"); | |
| 5885 free_humongous_region(hr, pre_used, free_list, humongous_proxy_set, par); | |
| 5886 } else { | |
| 4072 | 5887 _old_set.remove_with_proxy(hr, old_proxy_set); |
| 2152 | 5888 free_region(hr, pre_used, free_list, par); |
| 342 | 5889 } |
| 2173 | 5890 } else { |
| 5891 hr->rem_set()->do_cleanup_work(hrrs_cleanup_task); | |
| 342 | 5892 } |
| 5893 } | |
| 5894 | |
| 2152 | 5895 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5896 size_t* pre_used, | |
| 5897 FreeRegionList* free_list, | |
| 5898 bool par) { | |
| 5899 assert(!hr->isHumongous(), "this is only for non-humongous regions"); | |
| 5900 assert(!hr->is_empty(), "the region should not be empty"); | |
| 5901 assert(free_list != NULL, "pre-condition"); | |
| 5902 | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5903 // 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
|
5904 // 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
|
5905 // (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
|
5906 if (!hr->is_young()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5907 _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
|
5908 } |
| 2152 | 5909 *pre_used += hr->used(); |
| 5910 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
|
5911 free_list->add_as_head(hr); |
| 2152 | 5912 } |
| 5913 | |
| 5914 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5915 size_t* pre_used, | |
| 5916 FreeRegionList* free_list, | |
| 5917 HumongousRegionSet* humongous_proxy_set, | |
| 5918 bool par) { | |
| 5919 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 5920 assert(free_list != NULL, "pre-condition"); | |
| 5921 assert(humongous_proxy_set != NULL, "pre-condition"); | |
| 5922 | |
| 5923 size_t hr_used = hr->used(); | |
| 5924 size_t hr_capacity = hr->capacity(); | |
| 5925 size_t hr_pre_used = 0; | |
| 5926 _humongous_set.remove_with_proxy(hr, humongous_proxy_set); | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5927 // 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
|
5928 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5929 uint last_index = hr->last_hc_index(); |
| 2152 | 5930 hr->set_notHumongous(); |
| 5931 free_region(hr, &hr_pre_used, free_list, par); | |
| 5932 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5933 uint i = hr->hrs_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5934 while (i < last_index) { |
| 3766 | 5935 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5936 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 5937 curr_hr->set_notHumongous(); |
| 5938 free_region(curr_hr, &hr_pre_used, free_list, par); | |
| 5939 i += 1; | |
| 5940 } | |
| 5941 assert(hr_pre_used == hr_used, | |
| 5942 err_msg("hr_pre_used: "SIZE_FORMAT" and hr_used: "SIZE_FORMAT" " | |
| 5943 "should be the same", hr_pre_used, hr_used)); | |
| 5944 *pre_used += hr_pre_used; | |
| 5945 } | |
| 5946 | |
| 5947 void G1CollectedHeap::update_sets_after_freeing_regions(size_t pre_used, | |
| 5948 FreeRegionList* free_list, | |
| 4072 | 5949 OldRegionSet* old_proxy_set, |
| 2152 | 5950 HumongousRegionSet* humongous_proxy_set, |
| 5951 bool par) { | |
| 5952 if (pre_used > 0) { | |
| 5953 Mutex* lock = (par) ? ParGCRareEvent_lock : NULL; | |
| 342 | 5954 MutexLockerEx x(lock, Mutex::_no_safepoint_check_flag); |
| 2152 | 5955 assert(_summary_bytes_used >= pre_used, |
| 5956 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" " | |
| 5957 "should be >= pre_used: "SIZE_FORMAT, | |
| 5958 _summary_bytes_used, pre_used)); | |
| 342 | 5959 _summary_bytes_used -= pre_used; |
| 2152 | 5960 } |
| 5961 if (free_list != NULL && !free_list->is_empty()) { | |
| 5962 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
2432
455328d90876
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
tonyp
parents:
2369
diff
changeset
|
5963 _free_list.add_as_head(free_list); |
| 2152 | 5964 } |
| 4072 | 5965 if (old_proxy_set != NULL && !old_proxy_set->is_empty()) { |
| 5966 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5967 _old_set.update_from_proxy(old_proxy_set); | |
| 5968 } | |
| 2152 | 5969 if (humongous_proxy_set != NULL && !humongous_proxy_set->is_empty()) { |
| 5970 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5971 _humongous_set.update_from_proxy(humongous_proxy_set); | |
| 342 | 5972 } |
| 5973 } | |
| 5974 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5975 class G1ParCleanupCTTask : public AbstractGangTask { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5976 CardTableModRefBS* _ct_bs; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5977 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5978 HeapRegion* volatile _su_head; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5979 public: |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5980 G1ParCleanupCTTask(CardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5981 G1CollectedHeap* g1h) : |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5982 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
|
5983 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5984 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5985 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5986 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5987 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5988 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5989 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5990 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5991 |
|
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|
5992 void clear_cards(HeapRegion* r) { |
|
3830
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|
5993 // Cards of the survivors should have already been dirtied. |
|
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|
5994 if (!r->is_survivor()) { |
|
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|
5995 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
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|
5996 } |
|
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|
5997 } |
|
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|
5998 }; |
|
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|
5999 |
|
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|
6000 #ifndef PRODUCT |
|
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|
6001 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
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7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6002 G1CollectedHeap* _g1h; |
|
940
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|
6003 CardTableModRefBS* _ct_bs; |
|
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|
6004 public: |
|
3317
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|
6005 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, CardTableModRefBS* ct_bs) |
|
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|
6006 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
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|
6007 virtual bool doHeapRegion(HeapRegion* r) { |
|
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|
6008 if (r->is_survivor()) { |
|
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|
6009 _g1h->verify_dirty_region(r); |
|
940
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|
6010 } else { |
|
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|
6011 _g1h->verify_not_dirty_region(r); |
|
940
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|
6012 } |
|
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|
6013 return false; |
|
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|
6014 } |
|
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|
6015 }; |
|
2433
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|
6016 |
|
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|
6017 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
|
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|
6018 // All of the region should be clean. |
|
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|
6019 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); |
|
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|
6020 MemRegion mr(hr->bottom(), hr->end()); |
|
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|
6021 ct_bs->verify_not_dirty_region(mr); |
|
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|
6022 } |
|
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|
6023 |
|
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|
6024 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
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|
6025 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
|
063382f9b575
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|
6026 // dirty allocated blocks as they allocate them. The thread that |
|
063382f9b575
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|
6027 // retires each region and replaces it with a new one will do a |
|
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|
6028 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
|
063382f9b575
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|
6029 // not dirty that area (one less thing to have to do while holding |
|
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|
6030 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
|
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|
6031 // is dirty. |
|
063382f9b575
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|
6032 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
|
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|
6033 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
|
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|
6034 ct_bs->verify_dirty_region(mr); |
|
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|
6035 } |
|
063382f9b575
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|
6036 |
|
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|
6037 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
|
3317
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|
6038 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
|
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|
6039 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
|
3317
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|
6040 verify_dirty_region(hr); |
|
2433
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|
6041 } |
|
abdfc822206f
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|
6042 } |
|
abdfc822206f
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|
6043 |
|
abdfc822206f
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|
6044 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
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|
6045 verify_dirty_young_list(_young_list->first_region()); |
|
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|
6046 } |
|
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|
6047 #endif |
|
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|
6048 |
| 342 | 6049 void G1CollectedHeap::cleanUpCardTable() { |
| 6050 CardTableModRefBS* ct_bs = (CardTableModRefBS*) (barrier_set()); | |
| 6051 double start = os::elapsedTime(); | |
| 6052 | |
| 4023 | 6053 { |
| 6054 // Iterate over the dirty cards region list. | |
| 6055 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 6056 | |
| 4711 | 6057 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 6058 set_par_threads(); | |
| 4023 | 6059 workers()->run_task(&cleanup_task); |
| 6060 set_par_threads(0); | |
| 6061 } else { | |
| 6062 while (_dirty_cards_region_list) { | |
| 6063 HeapRegion* r = _dirty_cards_region_list; | |
| 6064 cleanup_task.clear_cards(r); | |
| 6065 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 6066 if (_dirty_cards_region_list == r) { | |
| 6067 // The last region. | |
| 6068 _dirty_cards_region_list = NULL; | |
| 6069 } | |
| 6070 r->set_next_dirty_cards_region(NULL); | |
|
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|
6071 } |
|
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6819065: G1: eliminate high serial card table clearing time
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diff
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|
6072 } |
| 4023 | 6073 #ifndef PRODUCT |
| 6074 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 6075 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 6076 heap_region_iterate(&cleanup_verifier); | |
| 6077 } | |
| 6078 #endif | |
|
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|
6079 } |
|
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|
6080 |
| 342 | 6081 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
|
6082 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 6083 } |
| 6084 | |
| 10405 | 6085 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
| 2152 | 6086 size_t pre_used = 0; |
| 6087 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 6088 | |
| 342 | 6089 double young_time_ms = 0.0; |
| 6090 double non_young_time_ms = 0.0; | |
| 6091 | |
|
1394
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diff
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|
6092 // Since the collection set is a superset of the the young list, |
|
1316cec51b4d
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diff
changeset
|
6093 // all we need to do to clear the young list is clear its |
|
1316cec51b4d
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changeset
|
6094 // head and length, and unlink any young regions in the code below |
|
1316cec51b4d
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|
6095 _young_list->clear(); |
|
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diff
changeset
|
6096 |
| 342 | 6097 G1CollectorPolicy* policy = g1_policy(); |
| 6098 | |
| 6099 double start_sec = os::elapsedTime(); | |
| 6100 bool non_young = true; | |
| 6101 | |
| 6102 HeapRegion* cur = cs_head; | |
| 6103 int age_bound = -1; | |
| 6104 size_t rs_lengths = 0; | |
| 6105 | |
| 6106 while (cur != NULL) { | |
| 2361 | 6107 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 6108 if (non_young) { |
| 6109 if (cur->is_young()) { | |
| 6110 double end_sec = os::elapsedTime(); | |
| 6111 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 6112 non_young_time_ms += elapsed_ms; | |
| 6113 | |
| 6114 start_sec = os::elapsedTime(); | |
| 6115 non_young = false; | |
| 6116 } | |
| 6117 } else { | |
|
4097
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|
6118 if (!cur->is_young()) { |
|
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|
6119 double end_sec = os::elapsedTime(); |
|
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|
6120 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
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|
6121 young_time_ms += elapsed_ms; |
|
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|
6122 |
|
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|
6123 start_sec = os::elapsedTime(); |
|
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|
6124 non_young = true; |
|
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|
6125 } |
| 342 | 6126 } |
| 6127 | |
| 6128 rs_lengths += cur->rem_set()->occupied(); | |
| 6129 | |
| 6130 HeapRegion* next = cur->next_in_collection_set(); | |
| 6131 assert(cur->in_collection_set(), "bad CS"); | |
| 6132 cur->set_next_in_collection_set(NULL); | |
| 6133 cur->set_in_collection_set(false); | |
| 6134 | |
| 6135 if (cur->is_young()) { | |
| 6136 int index = cur->young_index_in_cset(); | |
|
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|
6137 assert(index != -1, "invariant"); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6138 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 6139 size_t words_survived = _surviving_young_words[index]; |
| 6140 cur->record_surv_words_in_group(words_survived); | |
|
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|
6141 |
|
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diff
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|
6142 // At this point the we have 'popped' cur from the collection set |
|
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|
6143 // (linked via next_in_collection_set()) but it is still in the |
|
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|
6144 // young list (linked via next_young_region()). Clear the |
|
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|
6145 // _next_young_region field. |
|
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|
6146 cur->set_next_young_region(NULL); |
| 342 | 6147 } else { |
| 6148 int index = cur->young_index_in_cset(); | |
|
4090
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|
6149 assert(index == -1, "invariant"); |
| 342 | 6150 } |
| 6151 | |
| 6152 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 6153 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 6154 "invariant" ); | |
| 6155 | |
| 6156 if (!cur->evacuation_failed()) { | |
|
4097
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|
6157 MemRegion used_mr = cur->used_region(); |
|
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|
6158 |
| 342 | 6159 // And the region is empty. |
|
4097
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changeset
|
6160 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
| 2152 | 6161 free_region(cur, &pre_used, &local_free_list, false /* par */); |
| 342 | 6162 } else { |
| 6163 cur->uninstall_surv_rate_group(); | |
|
4090
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|
6164 if (cur->is_young()) { |
| 342 | 6165 cur->set_young_index_in_cset(-1); |
|
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|
6166 } |
| 342 | 6167 cur->set_not_young(); |
| 6168 cur->set_evacuation_failed(false); | |
| 4072 | 6169 // The region is now considered to be old. |
| 6170 _old_set.add(cur); | |
| 10405 | 6171 evacuation_info.increment_collectionset_used_after(cur->used()); |
| 342 | 6172 } |
| 6173 cur = next; | |
| 6174 } | |
| 6175 | |
| 10405 | 6176 evacuation_info.set_regions_freed(local_free_list.length()); |
| 342 | 6177 policy->record_max_rs_lengths(rs_lengths); |
| 6178 policy->cset_regions_freed(); | |
| 6179 | |
| 6180 double end_sec = os::elapsedTime(); | |
| 6181 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
6182 |
|
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|
6183 if (non_young) { |
| 342 | 6184 non_young_time_ms += elapsed_ms; |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
6185 } else { |
| 342 | 6186 young_time_ms += elapsed_ms; |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
6187 } |
| 342 | 6188 |
| 2152 | 6189 update_sets_after_freeing_regions(pre_used, &local_free_list, |
| 4072 | 6190 NULL /* old_proxy_set */, |
| 2152 | 6191 NULL /* humongous_proxy_set */, |
| 6192 false /* par */); | |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
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6188
diff
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|
6193 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
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|
6194 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6195 } |
| 6196 | |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6197 // This routine is similar to the above but does not record |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6198 // any policy statistics or update free lists; we are abandoning |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6199 // the current incremental collection set in preparation of a |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6200 // full collection. After the full GC we will start to build up |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6201 // the incremental collection set again. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6202 // This is only called when we're doing a full collection |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6203 // and is immediately followed by the tearing down of the young list. |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6204 |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6205 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6206 HeapRegion* cur = cs_head; |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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changeset
|
6207 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6208 while (cur != NULL) { |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6209 HeapRegion* next = cur->next_in_collection_set(); |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6210 assert(cur->in_collection_set(), "bad CS"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6211 cur->set_next_in_collection_set(NULL); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6212 cur->set_in_collection_set(false); |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6213 cur->set_young_index_in_cset(-1); |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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|
6214 cur = next; |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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changeset
|
6215 } |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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changeset
|
6216 } |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6217 |
| 2152 | 6218 void G1CollectedHeap::set_free_regions_coming() { |
| 6219 if (G1ConcRegionFreeingVerbose) { | |
| 6220 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6221 "setting free regions coming"); | |
| 6222 } | |
| 6223 | |
| 6224 assert(!free_regions_coming(), "pre-condition"); | |
| 6225 _free_regions_coming = true; | |
| 342 | 6226 } |
| 6227 | |
| 2152 | 6228 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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4836
diff
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|
6229 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
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4836
diff
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|
6230 |
| 2152 | 6231 { |
| 6232 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6233 _free_regions_coming = false; | |
| 6234 SecondaryFreeList_lock->notify_all(); | |
| 6235 } | |
| 6236 | |
| 6237 if (G1ConcRegionFreeingVerbose) { | |
| 6238 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6239 "reset free regions coming"); | |
| 342 | 6240 } |
| 6241 } | |
| 6242 | |
| 2152 | 6243 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6244 // Most of the time we won't have to wait, so let's do a quick test | |
| 6245 // first before we take the lock. | |
| 6246 if (!free_regions_coming()) { | |
| 6247 return; | |
| 6248 } | |
| 6249 | |
| 6250 if (G1ConcRegionFreeingVerbose) { | |
| 6251 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6252 "waiting for free regions"); | |
| 342 | 6253 } |
| 6254 | |
| 6255 { | |
| 2152 | 6256 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6257 while (free_regions_coming()) { | |
| 6258 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6259 } |
| 2152 | 6260 } |
| 6261 | |
| 6262 if (G1ConcRegionFreeingVerbose) { | |
| 6263 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6264 "done waiting for free regions"); | |
| 6265 } | |
| 342 | 6266 } |
| 6267 | |
| 6268 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6269 assert(heap_lock_held_for_gc(), | |
| 6270 "the heap lock should already be held by or for this thread"); | |
| 6271 _young_list->push_region(hr); | |
| 6272 } | |
| 6273 | |
| 6274 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6275 private: | |
| 6276 bool _success; | |
| 6277 public: | |
| 6278 NoYoungRegionsClosure() : _success(true) { } | |
| 6279 bool doHeapRegion(HeapRegion* r) { | |
| 6280 if (r->is_young()) { | |
| 6281 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6282 r->bottom(), r->end()); | |
| 6283 _success = false; | |
| 6284 } | |
| 6285 return false; | |
| 6286 } | |
| 6287 bool success() { return _success; } | |
| 6288 }; | |
| 6289 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
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|
6290 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
changeset
|
6291 bool ret = _young_list->check_list_empty(check_sample); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6292 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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diff
changeset
|
6293 if (check_heap) { |
| 342 | 6294 NoYoungRegionsClosure closure; |
| 6295 heap_region_iterate(&closure); | |
| 6296 ret = ret && closure.success(); | |
| 6297 } | |
| 6298 | |
| 6299 return ret; | |
| 6300 } | |
| 6301 | |
| 4072 | 6302 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6303 private: | |
| 6304 OldRegionSet *_old_set; | |
| 2152 | 6305 |
| 342 | 6306 public: |
| 4072 | 6307 TearDownRegionSetsClosure(OldRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6308 |
| 342 | 6309 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6310 if (r->is_empty()) { |
| 6311 // We ignore empty regions, we'll empty the free list afterwards | |
| 6312 } else if (r->is_young()) { | |
| 6313 // We ignore young regions, we'll empty the young list afterwards | |
| 6314 } else if (r->isHumongous()) { | |
| 6315 // We ignore humongous regions, we're not tearing down the | |
| 6316 // humongous region set | |
| 342 | 6317 } else { |
| 4072 | 6318 // The rest should be old |
| 6319 _old_set->remove(r); | |
| 342 | 6320 } |
| 6321 return false; | |
| 6322 } | |
| 6323 | |
| 4072 | 6324 ~TearDownRegionSetsClosure() { |
| 6325 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6326 } |
| 342 | 6327 }; |
| 6328 | |
| 4072 | 6329 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6330 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6331 | |
| 6332 if (!free_list_only) { | |
| 6333 TearDownRegionSetsClosure cl(&_old_set); | |
| 6334 heap_region_iterate(&cl); | |
| 6335 | |
| 6336 // Need to do this after the heap iteration to be able to | |
| 6337 // recognize the young regions and ignore them during the iteration. | |
| 6338 _young_list->empty_list(); | |
| 6339 } | |
| 6340 _free_list.remove_all(); | |
| 6341 } | |
| 6342 | |
| 6343 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6344 private: | |
| 6345 bool _free_list_only; | |
| 6346 OldRegionSet* _old_set; | |
| 6347 FreeRegionList* _free_list; | |
| 6348 size_t _total_used; | |
| 6349 | |
| 6350 public: | |
| 6351 RebuildRegionSetsClosure(bool free_list_only, | |
| 6352 OldRegionSet* old_set, FreeRegionList* free_list) : | |
| 6353 _free_list_only(free_list_only), | |
| 6354 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 6355 assert(_free_list->is_empty(), "pre-condition"); | |
| 6356 if (!free_list_only) { | |
| 6357 assert(_old_set->is_empty(), "pre-condition"); | |
| 6358 } | |
| 6359 } | |
| 6360 | |
| 6361 bool doHeapRegion(HeapRegion* r) { | |
| 6362 if (r->continuesHumongous()) { | |
| 6363 return false; | |
| 6364 } | |
| 6365 | |
| 6366 if (r->is_empty()) { | |
| 6367 // Add free regions to the free list | |
| 6368 _free_list->add_as_tail(r); | |
| 6369 } else if (!_free_list_only) { | |
| 6370 assert(!r->is_young(), "we should not come across young regions"); | |
| 6371 | |
| 6372 if (r->isHumongous()) { | |
| 6373 // We ignore humongous regions, we left the humongous set unchanged | |
| 6374 } else { | |
| 6375 // The rest should be old, add them to the old set | |
| 6376 _old_set->add(r); | |
| 6377 } | |
| 6378 _total_used += r->used(); | |
| 6379 } | |
| 6380 | |
| 6381 return false; | |
| 6382 } | |
| 6383 | |
| 6384 size_t total_used() { | |
| 6385 return _total_used; | |
| 6386 } | |
| 6387 }; | |
| 6388 | |
| 6389 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6390 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6391 | |
| 6392 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); | |
| 6393 heap_region_iterate(&cl); | |
| 6394 | |
| 6395 if (!free_list_only) { | |
| 6396 _summary_bytes_used = cl.total_used(); | |
| 6397 } | |
| 6398 assert(_summary_bytes_used == recalculate_used(), | |
| 6399 err_msg("inconsistent _summary_bytes_used, " | |
| 6400 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 6401 _summary_bytes_used, recalculate_used())); | |
| 342 | 6402 } |
| 6403 | |
| 6404 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6405 _refine_cte_cl->set_concurrent(concurrent); | |
| 6406 } | |
| 6407 | |
| 6408 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6409 HeapRegion* hr = heap_region_containing(p); | |
| 6410 if (hr == NULL) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
6411 return false; |
| 342 | 6412 } else { |
| 6413 return hr->is_in(p); | |
| 6414 } | |
| 6415 } | |
| 2152 | 6416 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6417 // Methods for the mutator alloc region |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6418 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6419 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6420 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6421 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
|
6422 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6423 "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
|
6424 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
|
6425 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6426 HeapRegion* new_alloc_region = new_region(word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6427 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6428 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6429 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6430 _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
|
6431 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6432 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6433 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6434 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6435 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6436 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6437 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
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|
6438 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6439 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
|
6440 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
|
6441 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6442 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
|
6443 _summary_bytes_used += allocated_bytes; |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6444 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6445 // 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
|
6446 // instead of when it's allocated, since this is the point that its |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
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3979
diff
changeset
|
6447 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6448 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6449 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6450 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6451 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
|
6452 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6453 return _g1h->new_mutator_alloc_region(word_size, force); |
|
abdfc822206f
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|
6454 } |
|
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|
6455 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
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|
6456 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
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|
6457 // Don't change the number of workers. Use the value previously set |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
6458 // in the workgroup. |
| 4711 | 6459 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
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4711
diff
changeset
|
6460 uint n_workers = workers()->active_workers(); |
| 4711 | 6461 assert(UseDynamicNumberOfGCThreads || |
|
4095
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6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
6462 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
6463 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
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|
6464 if (n_workers == 0) { |
|
bca17e38de00
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|
6465 assert(false, "Should have been set in prior evacuation pause."); |
|
bca17e38de00
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|
6466 n_workers = ParallelGCThreads; |
|
bca17e38de00
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|
6467 workers()->set_active_workers(n_workers); |
|
bca17e38de00
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|
6468 } |
|
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|
6469 set_par_threads(n_workers); |
|
bca17e38de00
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|
6470 } |
|
bca17e38de00
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|
6471 |
|
2433
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|
6472 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
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|
6473 size_t allocated_bytes) { |
|
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|
6474 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
|
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|
6475 } |
|
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|
6476 |
|
3830
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|
6477 // Methods for the GC alloc regions |
|
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|
6478 |
|
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|
6479 HeapRegion* G1CollectedHeap::new_gc_alloc_region(size_t word_size, |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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|
6480 uint count, |
|
3830
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|
6481 GCAllocPurpose ap) { |
|
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|
6482 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
|
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|
6483 |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6484 if (count < g1_policy()->max_regions(ap)) { |
|
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|
6485 HeapRegion* new_alloc_region = new_region(word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6486 true /* do_expand */); |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6487 if (new_alloc_region != NULL) { |
|
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|
6488 // 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
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|
6489 // should never scan survivors. But it doesn't hurt to do it |
|
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|
6490 // for survivors too. |
|
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|
6491 new_alloc_region->set_saved_mark(); |
|
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|
6492 if (ap == GCAllocForSurvived) { |
|
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|
6493 new_alloc_region->set_survivor(); |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6494 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
|
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|
6495 } else { |
|
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|
6496 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
|
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|
6497 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
6498 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
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|
6499 new_alloc_region->note_start_of_copying(during_im); |
|
3830
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|
6500 return new_alloc_region; |
|
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diff
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|
6501 } else { |
|
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diff
changeset
|
6502 g1_policy()->note_alloc_region_limit_reached(ap); |
|
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diff
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|
6503 } |
|
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diff
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|
6504 } |
|
f44782f04dd4
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|
6505 return NULL; |
|
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diff
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|
6506 } |
|
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diff
changeset
|
6507 |
|
f44782f04dd4
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|
6508 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
|
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|
6509 size_t allocated_bytes, |
|
f44782f04dd4
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diff
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|
6510 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
6511 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
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4785
diff
changeset
|
6512 alloc_region->note_end_of_copying(during_im); |
|
3830
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|
6513 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
|
f44782f04dd4
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|
6514 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
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diff
changeset
|
6515 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6516 } else { |
| 6517 _old_set.add(alloc_region); | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6518 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
6519 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
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|
6520 } |
|
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diff
changeset
|
6521 |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
6522 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
|
f44782f04dd4
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diff
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|
6523 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6524 assert(!force, "not supported for GC alloc regions"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
6525 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
6526 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6527 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6528 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6529 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6530 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6531 GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
6532 } |
|
f44782f04dd4
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changeset
|
6533 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
6534 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
6535 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
6536 assert(!force, "not supported for GC alloc regions"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
6537 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
|
f44782f04dd4
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|
6538 } |
|
f44782f04dd4
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changeset
|
6539 |
|
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diff
changeset
|
6540 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
f44782f04dd4
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|
6541 size_t allocated_bytes) { |
|
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changeset
|
6542 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
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|
6543 GCAllocForTenured); |
|
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diff
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|
6544 } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6545 // Heap region set verification |
|
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|
6546 |
| 2152 | 6547 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6548 private: | |
| 4072 | 6549 FreeRegionList* _free_list; |
| 6550 OldRegionSet* _old_set; | |
| 2152 | 6551 HumongousRegionSet* _humongous_set; |
|
6010
720b6a76dd9d
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6008
diff
changeset
|
6552 uint _region_count; |
| 2152 | 6553 |
| 6554 public: | |
| 4072 | 6555 VerifyRegionListsClosure(OldRegionSet* old_set, |
| 6556 HumongousRegionSet* humongous_set, | |
| 2152 | 6557 FreeRegionList* free_list) : |
| 4072 | 6558 _old_set(old_set), _humongous_set(humongous_set), |
| 6559 _free_list(free_list), _region_count(0) { } | |
| 2152 | 6560 |
|
6010
720b6a76dd9d
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6008
diff
changeset
|
6561 uint region_count() { return _region_count; } |
| 2152 | 6562 |
| 6563 bool doHeapRegion(HeapRegion* hr) { | |
| 6564 _region_count += 1; | |
| 6565 | |
| 6566 if (hr->continuesHumongous()) { | |
| 6567 return false; | |
| 6568 } | |
| 6569 | |
| 6570 if (hr->is_young()) { | |
| 6571 // TODO | |
| 6572 } else if (hr->startsHumongous()) { | |
| 6573 _humongous_set->verify_next_region(hr); | |
| 6574 } else if (hr->is_empty()) { | |
| 6575 _free_list->verify_next_region(hr); | |
| 4072 | 6576 } else { |
| 6577 _old_set->verify_next_region(hr); | |
| 2152 | 6578 } |
| 6579 return false; | |
| 6580 } | |
| 6581 }; | |
| 6582 | |
|
6010
720b6a76dd9d
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diff
changeset
|
6583 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
| 3766 | 6584 HeapWord* bottom) { |
| 6585 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6586 MemRegion mr(bottom, end); | |
| 6587 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6588 // This might return NULL if the allocation fails | |
|
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6752
diff
changeset
|
6589 return new HeapRegion(hrs_index, _bot_shared, mr); |
| 3766 | 6590 } |
| 6591 | |
| 2152 | 6592 void G1CollectedHeap::verify_region_sets() { |
| 6593 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6594 | |
| 6595 // First, check the explicit lists. | |
| 6596 _free_list.verify(); | |
| 6597 { | |
| 6598 // Given that a concurrent operation might be adding regions to | |
| 6599 // the secondary free list we have to take the lock before | |
| 6600 // verifying it. | |
| 6601 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6602 _secondary_free_list.verify(); | |
| 6603 } | |
| 4072 | 6604 _old_set.verify(); |
| 2152 | 6605 _humongous_set.verify(); |
| 6606 | |
| 6607 // If a concurrent region freeing operation is in progress it will | |
| 6608 // be difficult to correctly attributed any free regions we come | |
| 6609 // across to the correct free list given that they might belong to | |
| 6610 // one of several (free_list, secondary_free_list, any local lists, | |
| 6611 // etc.). So, if that's the case we will skip the rest of the | |
| 6612 // verification operation. Alternatively, waiting for the concurrent | |
| 6613 // operation to complete will have a non-trivial effect on the GC's | |
| 6614 // operation (no concurrent operation will last longer than the | |
| 6615 // interval between two calls to verification) and it might hide | |
| 6616 // any issues that we would like to catch during testing. | |
| 6617 if (free_regions_coming()) { | |
| 6618 return; | |
| 6619 } | |
| 6620 | |
| 2361 | 6621 // Make sure we append the secondary_free_list on the free_list so |
| 6622 // that all free regions we will come across can be safely | |
| 6623 // attributed to the free_list. | |
| 6624 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6625 |
| 6626 // Finally, make sure that the region accounting in the lists is | |
| 6627 // consistent with what we see in the heap. | |
| 4072 | 6628 _old_set.verify_start(); |
| 2152 | 6629 _humongous_set.verify_start(); |
| 6630 _free_list.verify_start(); | |
| 6631 | |
| 4072 | 6632 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6633 heap_region_iterate(&cl); |
| 6634 | |
| 4072 | 6635 _old_set.verify_end(); |
| 2152 | 6636 _humongous_set.verify_end(); |
| 6637 _free_list.verify_end(); | |
| 342 | 6638 } |
| 12080 | 6639 |
| 6640 // Optimized nmethod scanning | |
| 6641 | |
| 6642 class RegisterNMethodOopClosure: public OopClosure { | |
| 6643 G1CollectedHeap* _g1h; | |
| 6644 nmethod* _nm; | |
| 6645 | |
| 6646 template <class T> void do_oop_work(T* p) { | |
| 6647 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6648 if (!oopDesc::is_null(heap_oop)) { | |
| 6649 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6650 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
| 6651 assert(!hr->isHumongous(), "code root in humongous region?"); | |
| 6652 | |
| 6653 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
| 6654 // entries but having duplicates is OK since we "mark" nmethods | |
| 6655 // as visited when we scan the strong code root lists during the GC. | |
| 6656 hr->add_strong_code_root(_nm); | |
| 6657 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), "add failed?"); | |
| 6658 } | |
| 6659 } | |
| 6660 | |
| 6661 public: | |
| 6662 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6663 _g1h(g1h), _nm(nm) {} | |
| 6664 | |
| 6665 void do_oop(oop* p) { do_oop_work(p); } | |
| 6666 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6667 }; | |
| 6668 | |
| 6669 class UnregisterNMethodOopClosure: public OopClosure { | |
| 6670 G1CollectedHeap* _g1h; | |
| 6671 nmethod* _nm; | |
| 6672 | |
| 6673 template <class T> void do_oop_work(T* p) { | |
| 6674 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6675 if (!oopDesc::is_null(heap_oop)) { | |
| 6676 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6677 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
| 6678 assert(!hr->isHumongous(), "code root in humongous region?"); | |
| 6679 hr->remove_strong_code_root(_nm); | |
| 6680 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), "remove failed?"); | |
| 6681 } | |
| 6682 } | |
| 6683 | |
| 6684 public: | |
| 6685 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6686 _g1h(g1h), _nm(nm) {} | |
| 6687 | |
| 6688 void do_oop(oop* p) { do_oop_work(p); } | |
| 6689 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6690 }; | |
| 6691 | |
| 6692 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
| 6693 CollectedHeap::register_nmethod(nm); | |
| 6694 | |
| 6695 guarantee(nm != NULL, "sanity"); | |
| 6696 RegisterNMethodOopClosure reg_cl(this, nm); | |
| 6697 nm->oops_do(®_cl); | |
| 6698 } | |
| 6699 | |
| 6700 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
| 6701 CollectedHeap::unregister_nmethod(nm); | |
| 6702 | |
| 6703 guarantee(nm != NULL, "sanity"); | |
| 6704 UnregisterNMethodOopClosure reg_cl(this, nm); | |
| 6705 nm->oops_do(®_cl, true); | |
| 6706 } | |
| 6707 | |
| 6708 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
| 6709 public: | |
| 6710 bool doHeapRegion(HeapRegion *hr) { | |
| 6711 assert(!hr->isHumongous(), "humongous region in collection set?"); | |
| 6712 hr->migrate_strong_code_roots(); | |
| 6713 return false; | |
| 6714 } | |
| 6715 }; | |
| 6716 | |
| 6717 void G1CollectedHeap::migrate_strong_code_roots() { | |
| 6718 MigrateCodeRootsHeapRegionClosure cl; | |
| 6719 double migrate_start = os::elapsedTime(); | |
| 6720 collection_set_iterate(&cl); | |
| 6721 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
| 6722 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
| 6723 } | |
| 6724 | |
| 6725 // Mark all the code roots that point into regions *not* in the | |
| 6726 // collection set. | |
| 6727 // | |
| 6728 // Note we do not want to use a "marking" CodeBlobToOopClosure while | |
| 6729 // walking the the code roots lists of regions not in the collection | |
| 6730 // set. Suppose we have an nmethod (M) that points to objects in two | |
| 6731 // separate regions - one in the collection set (R1) and one not (R2). | |
| 6732 // Using a "marking" CodeBlobToOopClosure here would result in "marking" | |
| 6733 // nmethod M when walking the code roots for R1. When we come to scan | |
| 6734 // the code roots for R2, we would see that M is already marked and it | |
| 6735 // would be skipped and the objects in R2 that are referenced from M | |
| 6736 // would not be evacuated. | |
| 6737 | |
| 6738 class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { | |
| 6739 | |
| 6740 class MarkStrongCodeRootOopClosure: public OopClosure { | |
| 6741 ConcurrentMark* _cm; | |
| 6742 HeapRegion* _hr; | |
| 6743 uint _worker_id; | |
| 6744 | |
| 6745 template <class T> void do_oop_work(T* p) { | |
| 6746 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6747 if (!oopDesc::is_null(heap_oop)) { | |
| 6748 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6749 // Only mark objects in the region (which is assumed | |
| 6750 // to be not in the collection set). | |
| 6751 if (_hr->is_in(obj)) { | |
| 6752 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); | |
| 6753 } | |
| 6754 } | |
| 6755 } | |
| 6756 | |
| 6757 public: | |
| 6758 MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : | |
| 6759 _cm(cm), _hr(hr), _worker_id(worker_id) { | |
| 6760 assert(!_hr->in_collection_set(), "sanity"); | |
| 6761 } | |
| 6762 | |
| 6763 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6764 void do_oop(oop* p) { do_oop_work(p); } | |
| 6765 }; | |
| 6766 | |
| 6767 MarkStrongCodeRootOopClosure _oop_cl; | |
| 6768 | |
| 6769 public: | |
| 6770 MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): | |
| 6771 _oop_cl(cm, hr, worker_id) {} | |
| 6772 | |
| 6773 void do_code_blob(CodeBlob* cb) { | |
| 6774 nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); | |
| 6775 if (nm != NULL) { | |
| 6776 nm->oops_do(&_oop_cl); | |
| 6777 } | |
| 6778 } | |
| 6779 }; | |
| 6780 | |
| 6781 class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { | |
| 6782 G1CollectedHeap* _g1h; | |
| 6783 uint _worker_id; | |
| 6784 | |
| 6785 public: | |
| 6786 MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : | |
| 6787 _g1h(g1h), _worker_id(worker_id) {} | |
| 6788 | |
| 6789 bool doHeapRegion(HeapRegion *hr) { | |
| 6790 HeapRegionRemSet* hrrs = hr->rem_set(); | |
| 6791 if (hr->isHumongous()) { | |
| 6792 // Code roots should never be attached to a humongous region | |
| 6793 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
| 6794 return false; | |
| 6795 } | |
| 6796 | |
| 6797 if (hr->in_collection_set()) { | |
| 6798 // Don't mark code roots into regions in the collection set here. | |
| 6799 // They will be marked when we scan them. | |
| 6800 return false; | |
| 6801 } | |
| 6802 | |
| 6803 MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); | |
| 6804 hr->strong_code_roots_do(&cb_cl); | |
| 6805 return false; | |
| 6806 } | |
| 6807 }; | |
| 6808 | |
| 6809 void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { | |
| 6810 MarkStrongCodeRootsHRClosure cl(this, worker_id); | |
|
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6811 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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6812 heap_region_par_iterate_chunked(&cl, |
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6813 worker_id, |
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6814 workers()->active_workers(), |
|
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6815 HeapRegion::ParMarkRootClaimValue); |
|
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6816 } else { |
|
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6817 heap_region_iterate(&cl); |
|
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6818 } |
| 12080 | 6819 } |
| 6820 | |
| 6821 class RebuildStrongCodeRootClosure: public CodeBlobClosure { | |
| 6822 G1CollectedHeap* _g1h; | |
| 6823 | |
| 6824 public: | |
| 6825 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
| 6826 _g1h(g1h) {} | |
| 6827 | |
| 6828 void do_code_blob(CodeBlob* cb) { | |
| 6829 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
| 6830 if (nm == NULL) { | |
| 6831 return; | |
| 6832 } | |
| 6833 | |
| 6834 if (ScavengeRootsInCode && nm->detect_scavenge_root_oops()) { | |
| 6835 _g1h->register_nmethod(nm); | |
| 6836 } | |
| 6837 } | |
| 6838 }; | |
| 6839 | |
| 6840 void G1CollectedHeap::rebuild_strong_code_roots() { | |
| 6841 RebuildStrongCodeRootClosure blob_cl(this); | |
| 6842 CodeCache::blobs_do(&blob_cl); | |
| 6843 } |