Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 17947:1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
Reviewed-by: brutisso, mgerdin
| author | pliden |
|---|---|
| date | Fri, 11 Apr 2014 11:00:12 +0200 |
| parents | 78bbf4d43a14 |
| children | e4d318eea75a |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
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25 #if !defined(__clang_major__) && defined(__GNUC__) |
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26 #define ATTRIBUTE_PRINTF(x,y) // FIXME, formats are a mess. |
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27 #endif |
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28 |
| 1972 | 29 #include "precompiled.hpp" |
| 12080 | 30 #include "code/codeCache.hpp" |
| 1972 | 31 #include "code/icBuffer.hpp" |
| 32 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
| 33 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
| 34 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
| 35 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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36 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
| 1972 | 37 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 38 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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39 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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40 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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41 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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42 #include "gc_implementation/g1/g1Log.hpp" |
| 1972 | 43 #include "gc_implementation/g1/g1MarkSweep.hpp" |
| 44 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
| 45 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
| 17764 | 46 #include "gc_implementation/g1/g1StringDedup.hpp" |
| 10405 | 47 #include "gc_implementation/g1/g1YCTypes.hpp" |
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48 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 49 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
| 50 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 51 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
| 10405 | 52 #include "gc_implementation/shared/gcHeapSummary.hpp" |
| 53 #include "gc_implementation/shared/gcTimer.hpp" | |
| 54 #include "gc_implementation/shared/gcTrace.hpp" | |
| 55 #include "gc_implementation/shared/gcTraceTime.hpp" | |
| 1972 | 56 #include "gc_implementation/shared/isGCActiveMark.hpp" |
| 57 #include "memory/gcLocker.inline.hpp" | |
| 58 #include "memory/generationSpec.hpp" | |
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59 #include "memory/iterator.hpp" |
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60 #include "memory/referenceProcessor.hpp" |
| 1972 | 61 #include "oops/oop.inline.hpp" |
| 62 #include "oops/oop.pcgc.inline.hpp" | |
| 63 #include "runtime/vmThread.hpp" | |
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64 #include "utilities/ticks.hpp" |
| 342 | 65 |
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66 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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67 |
| 342 | 68 // turn it on so that the contents of the young list (scan-only / |
| 69 // to-be-collected) are printed at "strategic" points before / during | |
| 70 // / after the collection --- this is useful for debugging | |
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71 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 72 // CURRENT STATUS |
| 73 // This file is under construction. Search for "FIXME". | |
| 74 | |
| 75 // INVARIANTS/NOTES | |
| 76 // | |
| 77 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 78 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 79 // and allocate_new_tlab, which are the "entry" points to the | |
| 80 // allocation code from the rest of the JVM. (Note that this does not | |
| 81 // apply to TLAB allocation, which is not part of this interface: it | |
| 82 // is done by clients of this interface.) | |
| 342 | 83 |
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84 // Notes on implementation of parallelism in different tasks. |
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85 // |
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86 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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87 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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88 // It does use run_task() which sets _n_workers in the task. |
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89 // G1ParTask executes g1_process_strong_roots() -> |
| 10405 | 90 // SharedHeap::process_strong_roots() which calls eventually to |
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91 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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92 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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93 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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94 // |
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95 |
| 342 | 96 // Local to this file. |
| 97 | |
| 98 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 99 SuspendibleThreadSet* _sts; | |
| 100 G1RemSet* _g1rs; | |
| 101 ConcurrentG1Refine* _cg1r; | |
| 102 bool _concurrent; | |
| 103 public: | |
| 104 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
| 105 G1RemSet* g1rs, | |
| 106 ConcurrentG1Refine* cg1r) : | |
| 107 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
| 108 {} | |
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109 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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110 bool oops_into_cset = _g1rs->refine_card(card_ptr, worker_i, false); |
| 1705 | 111 // This path is executed by the concurrent refine or mutator threads, |
| 112 // concurrently, and so we do not care if card_ptr contains references | |
| 113 // that point into the collection set. | |
| 114 assert(!oops_into_cset, "should be"); | |
| 115 | |
| 342 | 116 if (_concurrent && _sts->should_yield()) { |
| 117 // Caller will actually yield. | |
| 118 return false; | |
| 119 } | |
| 120 // Otherwise, we finished successfully; return true. | |
| 121 return true; | |
| 122 } | |
| 123 void set_concurrent(bool b) { _concurrent = b; } | |
| 124 }; | |
| 125 | |
| 126 | |
| 127 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 128 int _calls; | |
| 129 G1CollectedHeap* _g1h; | |
| 130 CardTableModRefBS* _ctbs; | |
| 131 int _histo[256]; | |
| 132 public: | |
| 133 ClearLoggedCardTableEntryClosure() : | |
| 12343 | 134 _calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) |
| 342 | 135 { |
| 136 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 137 } | |
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138 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
| 342 | 139 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { |
| 140 _calls++; | |
| 141 unsigned char* ujb = (unsigned char*)card_ptr; | |
| 142 int ind = (int)(*ujb); | |
| 143 _histo[ind]++; | |
| 144 *card_ptr = -1; | |
| 145 } | |
| 146 return true; | |
| 147 } | |
| 148 int calls() { return _calls; } | |
| 149 void print_histo() { | |
| 150 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 151 for (int i = 0; i < 256; i++) { | |
| 152 if (_histo[i] != 0) { | |
| 153 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 154 } | |
| 155 } | |
| 156 } | |
| 157 }; | |
| 158 | |
| 159 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 160 int _calls; | |
| 161 G1CollectedHeap* _g1h; | |
| 162 CardTableModRefBS* _ctbs; | |
| 163 public: | |
| 164 RedirtyLoggedCardTableEntryClosure() : | |
| 12343 | 165 _calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) {} |
| 166 | |
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167 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
| 342 | 168 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { |
| 169 _calls++; | |
| 170 *card_ptr = 0; | |
| 171 } | |
| 172 return true; | |
| 173 } | |
| 174 int calls() { return _calls; } | |
| 175 }; | |
| 176 | |
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177 YoungList::YoungList(G1CollectedHeap* g1h) : |
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178 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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179 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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180 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 181 } |
| 182 | |
| 183 void YoungList::push_region(HeapRegion *hr) { | |
| 184 assert(!hr->is_young(), "should not already be young"); | |
| 185 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 186 | |
| 187 hr->set_next_young_region(_head); | |
| 188 _head = hr; | |
| 189 | |
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190 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 191 ++_length; |
| 192 } | |
| 193 | |
| 194 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 195 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 196 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 197 | |
| 198 hr->set_next_young_region(_survivor_head); | |
| 199 if (_survivor_head == NULL) { | |
| 545 | 200 _survivor_tail = hr; |
| 342 | 201 } |
| 202 _survivor_head = hr; | |
| 203 ++_survivor_length; | |
| 204 } | |
| 205 | |
| 206 void YoungList::empty_list(HeapRegion* list) { | |
| 207 while (list != NULL) { | |
| 208 HeapRegion* next = list->get_next_young_region(); | |
| 209 list->set_next_young_region(NULL); | |
| 210 list->uninstall_surv_rate_group(); | |
| 211 list->set_not_young(); | |
| 212 list = next; | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 void YoungList::empty_list() { | |
| 217 assert(check_list_well_formed(), "young list should be well formed"); | |
| 218 | |
| 219 empty_list(_head); | |
| 220 _head = NULL; | |
| 221 _length = 0; | |
| 222 | |
| 223 empty_list(_survivor_head); | |
| 224 _survivor_head = NULL; | |
| 545 | 225 _survivor_tail = NULL; |
| 342 | 226 _survivor_length = 0; |
| 227 | |
| 228 _last_sampled_rs_lengths = 0; | |
| 229 | |
| 230 assert(check_list_empty(false), "just making sure..."); | |
| 231 } | |
| 232 | |
| 233 bool YoungList::check_list_well_formed() { | |
| 234 bool ret = true; | |
| 235 | |
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236 uint length = 0; |
| 342 | 237 HeapRegion* curr = _head; |
| 238 HeapRegion* last = NULL; | |
| 239 while (curr != NULL) { | |
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240 if (!curr->is_young()) { |
| 342 | 241 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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242 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 243 curr->bottom(), curr->end(), |
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244 curr->is_young(), curr->is_survivor()); |
| 342 | 245 ret = false; |
| 246 } | |
| 247 ++length; | |
| 248 last = curr; | |
| 249 curr = curr->get_next_young_region(); | |
| 250 } | |
| 251 ret = ret && (length == _length); | |
| 252 | |
| 253 if (!ret) { | |
| 254 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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255 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
| 342 | 256 length, _length); |
| 257 } | |
| 258 | |
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259 return ret; |
| 342 | 260 } |
| 261 | |
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262 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 263 bool ret = true; |
| 264 | |
| 265 if (_length != 0) { | |
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266 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
| 342 | 267 _length); |
| 268 ret = false; | |
| 269 } | |
| 270 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 271 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 272 ret = false; | |
| 273 } | |
| 274 if (_head != NULL) { | |
| 275 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 276 ret = false; | |
| 277 } | |
| 278 if (!ret) { | |
| 279 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 280 } | |
| 281 | |
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282 return ret; |
| 342 | 283 } |
| 284 | |
| 285 void | |
| 286 YoungList::rs_length_sampling_init() { | |
| 287 _sampled_rs_lengths = 0; | |
| 288 _curr = _head; | |
| 289 } | |
| 290 | |
| 291 bool | |
| 292 YoungList::rs_length_sampling_more() { | |
| 293 return _curr != NULL; | |
| 294 } | |
| 295 | |
| 296 void | |
| 297 YoungList::rs_length_sampling_next() { | |
| 298 assert( _curr != NULL, "invariant" ); | |
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299 size_t rs_length = _curr->rem_set()->occupied(); |
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300 |
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301 _sampled_rs_lengths += rs_length; |
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302 |
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303 // The current region may not yet have been added to the |
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304 // incremental collection set (it gets added when it is |
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305 // retired as the current allocation region). |
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306 if (_curr->in_collection_set()) { |
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307 // Update the collection set policy information for this region |
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308 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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309 } |
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310 |
| 342 | 311 _curr = _curr->get_next_young_region(); |
| 312 if (_curr == NULL) { | |
| 313 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 314 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 void | |
| 319 YoungList::reset_auxilary_lists() { | |
| 320 guarantee( is_empty(), "young list should be empty" ); | |
| 321 assert(check_list_well_formed(), "young list should be well formed"); | |
| 322 | |
| 323 // Add survivor regions to SurvRateGroup. | |
| 324 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 325 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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326 |
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327 int young_index_in_cset = 0; |
| 342 | 328 for (HeapRegion* curr = _survivor_head; |
| 329 curr != NULL; | |
| 330 curr = curr->get_next_young_region()) { | |
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331 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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332 |
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333 // The region is a non-empty survivor so let's add it to |
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334 // the incremental collection set for the next evacuation |
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335 // pause. |
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336 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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337 young_index_in_cset += 1; |
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338 } |
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339 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
| 342 | 340 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 341 | |
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342 _head = _survivor_head; |
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343 _length = _survivor_length; |
| 342 | 344 if (_survivor_head != NULL) { |
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345 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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346 assert(_survivor_length > 0, "invariant"); |
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347 _survivor_tail->set_next_young_region(NULL); |
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348 } |
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349 |
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350 // Don't clear the survivor list handles until the start of |
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351 // the next evacuation pause - we need it in order to re-tag |
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352 // the survivor regions from this evacuation pause as 'young' |
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353 // at the start of the next. |
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354 |
| 545 | 355 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 356 |
| 357 assert(check_list_well_formed(), "young list should be well formed"); | |
| 358 } | |
| 359 | |
| 360 void YoungList::print() { | |
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361 HeapRegion* lists[] = {_head, _survivor_head}; |
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362 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 363 |
| 364 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 365 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 366 HeapRegion *curr = lists[list]; | |
| 367 if (curr == NULL) | |
| 368 gclog_or_tty->print_cr(" empty"); | |
| 369 while (curr != NULL) { | |
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370 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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371 HR_FORMAT_PARAMS(curr), |
| 342 | 372 curr->prev_top_at_mark_start(), |
| 373 curr->next_top_at_mark_start(), | |
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374 curr->age_in_surv_rate_group_cond()); |
| 342 | 375 curr = curr->get_next_young_region(); |
| 376 } | |
| 377 } | |
| 378 | |
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379 gclog_or_tty->cr(); |
| 342 | 380 } |
| 381 | |
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382 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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383 { |
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384 // Claim the right to put the region on the dirty cards region list |
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385 // by installing a self pointer. |
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386 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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387 if (next == NULL) { |
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388 HeapRegion* res = (HeapRegion*) |
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389 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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390 NULL); |
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391 if (res == NULL) { |
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392 HeapRegion* head; |
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393 do { |
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394 // Put the region to the dirty cards region list. |
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395 head = _dirty_cards_region_list; |
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396 next = (HeapRegion*) |
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397 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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398 if (next == head) { |
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399 assert(hr->get_next_dirty_cards_region() == hr, |
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400 "hr->get_next_dirty_cards_region() != hr"); |
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401 if (next == NULL) { |
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402 // The last region in the list points to itself. |
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403 hr->set_next_dirty_cards_region(hr); |
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404 } else { |
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405 hr->set_next_dirty_cards_region(next); |
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406 } |
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407 } |
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408 } while (next != head); |
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409 } |
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410 } |
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411 } |
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412 |
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413 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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414 { |
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415 HeapRegion* head; |
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416 HeapRegion* hr; |
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417 do { |
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418 head = _dirty_cards_region_list; |
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419 if (head == NULL) { |
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420 return NULL; |
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421 } |
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422 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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423 if (head == new_head) { |
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424 // The last region. |
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425 new_head = NULL; |
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426 } |
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427 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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428 head); |
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429 } while (hr != head); |
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430 assert(hr != NULL, "invariant"); |
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431 hr->set_next_dirty_cards_region(NULL); |
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432 return hr; |
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433 } |
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434 |
| 342 | 435 void G1CollectedHeap::stop_conc_gc_threads() { |
| 794 | 436 _cg1r->stop(); |
| 342 | 437 _cmThread->stop(); |
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438 if (G1StringDedup::is_enabled()) { |
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439 G1StringDedup::stop(); |
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440 } |
| 342 | 441 } |
| 442 | |
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443 #ifdef ASSERT |
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444 // A region is added to the collection set as it is retired |
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445 // so an address p can point to a region which will be in the |
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446 // collection set but has not yet been retired. This method |
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447 // therefore is only accurate during a GC pause after all |
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448 // regions have been retired. It is used for debugging |
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449 // to check if an nmethod has references to objects that can |
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450 // be move during a partial collection. Though it can be |
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451 // inaccurate, it is sufficient for G1 because the conservative |
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452 // implementation of is_scavengable() for G1 will indicate that |
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453 // all nmethods must be scanned during a partial collection. |
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454 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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455 HeapRegion* hr = heap_region_containing(p); |
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456 return hr != NULL && hr->in_collection_set(); |
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457 } |
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458 #endif |
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459 |
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460 // Returns true if the reference points to an object that |
| 10405 | 461 // can move in an incremental collection. |
|
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462 bool G1CollectedHeap::is_scavengable(const void* p) { |
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463 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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464 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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465 HeapRegion* hr = heap_region_containing(p); |
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466 if (hr == NULL) { |
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467 // null |
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468 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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469 return false; |
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470 } else { |
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471 return !hr->isHumongous(); |
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472 } |
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473 } |
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474 |
| 342 | 475 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 476 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 12343 | 477 CardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 478 |
| 479 // Count the dirty cards at the start. | |
| 480 CountNonCleanMemRegionClosure count1(this); | |
| 481 ct_bs->mod_card_iterate(&count1); | |
| 482 int orig_count = count1.n(); | |
| 483 | |
| 484 // First clear the logged cards. | |
| 485 ClearLoggedCardTableEntryClosure clear; | |
| 486 dcqs.set_closure(&clear); | |
| 487 dcqs.apply_closure_to_all_completed_buffers(); | |
| 488 dcqs.iterate_closure_all_threads(false); | |
| 489 clear.print_histo(); | |
| 490 | |
| 491 // Now ensure that there's no dirty cards. | |
| 492 CountNonCleanMemRegionClosure count2(this); | |
| 493 ct_bs->mod_card_iterate(&count2); | |
| 494 if (count2.n() != 0) { | |
| 495 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 496 count2.n(), orig_count); | |
| 497 } | |
| 498 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 499 | |
| 500 RedirtyLoggedCardTableEntryClosure redirty; | |
| 501 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
| 502 dcqs.apply_closure_to_all_completed_buffers(); | |
| 503 dcqs.iterate_closure_all_threads(false); | |
| 504 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
| 505 clear.calls(), orig_count); | |
| 506 guarantee(redirty.calls() == clear.calls(), | |
| 507 "Or else mechanism is broken."); | |
| 508 | |
| 509 CountNonCleanMemRegionClosure count3(this); | |
| 510 ct_bs->mod_card_iterate(&count3); | |
| 511 if (count3.n() != orig_count) { | |
| 512 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 513 orig_count, count3.n()); | |
| 514 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 515 } | |
| 516 | |
| 517 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 518 } | |
| 519 | |
| 520 // Private class members. | |
| 521 | |
| 522 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 523 | |
| 524 // Private methods. | |
| 525 | |
| 2152 | 526 HeapRegion* |
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527 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
| 2152 | 528 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 529 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 530 if (!_secondary_free_list.is_empty()) { | |
| 531 if (G1ConcRegionFreeingVerbose) { | |
| 532 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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533 "secondary_free_list has %u entries", |
| 2152 | 534 _secondary_free_list.length()); |
| 535 } | |
| 536 // It looks as if there are free regions available on the | |
| 537 // secondary_free_list. Let's move them to the free_list and try | |
| 538 // again to allocate from it. | |
| 539 append_secondary_free_list(); | |
| 540 | |
| 541 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
| 542 "empty we should have moved at least one entry to the free_list"); | |
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543 HeapRegion* res = _free_list.remove_region(is_old); |
| 2152 | 544 if (G1ConcRegionFreeingVerbose) { |
| 545 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 546 "allocated "HR_FORMAT" from secondary_free_list", | |
| 547 HR_FORMAT_PARAMS(res)); | |
| 548 } | |
| 549 return res; | |
| 550 } | |
| 551 | |
| 10405 | 552 // Wait here until we get notified either when (a) there are no |
| 2152 | 553 // more free regions coming or (b) some regions have been moved on |
| 554 // the secondary_free_list. | |
| 555 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 556 } | |
| 557 | |
| 558 if (G1ConcRegionFreeingVerbose) { | |
| 559 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 560 "could not allocate from secondary_free_list"); | |
| 561 } | |
| 562 return NULL; | |
| 563 } | |
| 564 | |
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565 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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566 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 567 "the only time we use this to allocate a humongous region is " |
| 568 "when we are allocating a single humongous region"); | |
| 569 | |
| 570 HeapRegion* res; | |
| 571 if (G1StressConcRegionFreeing) { | |
| 572 if (!_secondary_free_list.is_empty()) { | |
| 573 if (G1ConcRegionFreeingVerbose) { | |
| 574 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 575 "forced to look at the secondary_free_list"); | |
| 576 } | |
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577 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 578 if (res != NULL) { |
| 579 return res; | |
| 580 } | |
| 581 } | |
| 582 } | |
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583 |
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584 res = _free_list.remove_region(is_old); |
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585 |
| 2152 | 586 if (res == NULL) { |
| 587 if (G1ConcRegionFreeingVerbose) { | |
| 588 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 589 "res == NULL, trying the secondary_free_list"); | |
| 590 } | |
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591 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 592 } |
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593 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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594 // Currently, only attempts to allocate GC alloc regions set |
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595 // do_expand to true. So, we should only reach here during a |
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596 // safepoint. If this assumption changes we might have to |
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597 // reconsider the use of _expand_heap_after_alloc_failure. |
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598 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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599 |
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600 ergo_verbose1(ErgoHeapSizing, |
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601 "attempt heap expansion", |
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602 ergo_format_reason("region allocation request failed") |
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603 ergo_format_byte("allocation request"), |
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604 word_size * HeapWordSize); |
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605 if (expand(word_size * HeapWordSize)) { |
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606 // Given that expand() succeeded in expanding the heap, and we |
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607 // always expand the heap by an amount aligned to the heap |
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608 // region size, the free list should in theory not be empty. |
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609 // In either case remove_region() will check for NULL. |
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610 res = _free_list.remove_region(is_old); |
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611 } else { |
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612 _expand_heap_after_alloc_failure = false; |
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613 } |
| 342 | 614 } |
| 615 return res; | |
| 616 } | |
| 617 | |
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618 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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619 size_t word_size) { |
| 2361 | 620 assert(isHumongous(word_size), "word_size should be humongous"); |
| 621 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 622 | |
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623 uint first = G1_NULL_HRS_INDEX; |
| 2152 | 624 if (num_regions == 1) { |
| 625 // Only one region to allocate, no need to go through the slower | |
| 10405 | 626 // path. The caller will attempt the expansion if this fails, so |
| 2152 | 627 // let's not try to expand here too. |
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628 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
| 2152 | 629 if (hr != NULL) { |
| 630 first = hr->hrs_index(); | |
| 631 } else { | |
| 3766 | 632 first = G1_NULL_HRS_INDEX; |
| 2152 | 633 } |
| 634 } else { | |
| 635 // We can't allocate humongous regions while cleanupComplete() is | |
| 636 // running, since some of the regions we find to be empty might not | |
| 637 // yet be added to the free list and it is not straightforward to | |
| 638 // know which list they are on so that we can remove them. Note | |
| 639 // that we only need to do this if we need to allocate more than | |
| 640 // one region to satisfy the current humongous allocation | |
| 641 // request. If we are only allocating one region we use the common | |
| 642 // region allocation code (see above). | |
| 643 wait_while_free_regions_coming(); | |
| 2361 | 644 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 645 |
| 646 if (free_regions() >= num_regions) { | |
| 3766 | 647 first = _hrs.find_contiguous(num_regions); |
| 648 if (first != G1_NULL_HRS_INDEX) { | |
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649 for (uint i = first; i < first + num_regions; ++i) { |
| 3766 | 650 HeapRegion* hr = region_at(i); |
| 2152 | 651 assert(hr->is_empty(), "sanity"); |
| 2361 | 652 assert(is_on_master_free_list(hr), "sanity"); |
| 2152 | 653 hr->set_pending_removal(true); |
| 654 } | |
| 655 _free_list.remove_all_pending(num_regions); | |
| 656 } | |
| 657 } | |
| 658 } | |
| 659 return first; | |
| 660 } | |
| 661 | |
| 2361 | 662 HeapWord* |
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663 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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664 uint num_regions, |
| 2361 | 665 size_t word_size) { |
| 3766 | 666 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
| 2361 | 667 assert(isHumongous(word_size), "word_size should be humongous"); |
| 668 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 669 | |
| 670 // Index of last region in the series + 1. | |
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671 uint last = first + num_regions; |
| 2361 | 672 |
| 673 // We need to initialize the region(s) we just discovered. This is | |
| 674 // a bit tricky given that it can happen concurrently with | |
| 675 // refinement threads refining cards on these regions and | |
| 676 // potentially wanting to refine the BOT as they are scanning | |
| 677 // those cards (this can happen shortly after a cleanup; see CR | |
| 678 // 6991377). So we have to set up the region(s) carefully and in | |
| 679 // a specific order. | |
| 680 | |
| 681 // The word size sum of all the regions we will allocate. | |
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682 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 683 assert(word_size <= word_size_sum, "sanity"); |
| 684 | |
| 685 // This will be the "starts humongous" region. | |
| 3766 | 686 HeapRegion* first_hr = region_at(first); |
| 2361 | 687 // The header of the new object will be placed at the bottom of |
| 688 // the first region. | |
| 689 HeapWord* new_obj = first_hr->bottom(); | |
| 690 // This will be the new end of the first region in the series that | |
| 10405 | 691 // should also match the end of the last region in the series. |
| 2361 | 692 HeapWord* new_end = new_obj + word_size_sum; |
| 693 // This will be the new top of the first region that will reflect | |
| 694 // this allocation. | |
| 695 HeapWord* new_top = new_obj + word_size; | |
| 696 | |
| 697 // First, we need to zero the header of the space that we will be | |
| 698 // allocating. When we update top further down, some refinement | |
| 699 // threads might try to scan the region. By zeroing the header we | |
| 700 // ensure that any thread that will try to scan the region will | |
| 701 // come across the zero klass word and bail out. | |
| 702 // | |
| 703 // NOTE: It would not have been correct to have used | |
| 704 // CollectedHeap::fill_with_object() and make the space look like | |
| 705 // an int array. The thread that is doing the allocation will | |
| 706 // later update the object header to a potentially different array | |
| 707 // type and, for a very short period of time, the klass and length | |
| 708 // fields will be inconsistent. This could cause a refinement | |
| 709 // thread to calculate the object size incorrectly. | |
| 710 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 711 | |
| 712 // We will set up the first region as "starts humongous". This | |
| 713 // will also update the BOT covering all the regions to reflect | |
| 714 // that there is a single object that starts at the bottom of the | |
| 715 // first region. | |
| 716 first_hr->set_startsHumongous(new_top, new_end); | |
| 717 | |
| 718 // Then, if there are any, we will set up the "continues | |
| 719 // humongous" regions. | |
| 720 HeapRegion* hr = NULL; | |
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721 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 722 hr = region_at(i); |
| 2361 | 723 hr->set_continuesHumongous(first_hr); |
| 724 } | |
| 725 // If we have "continues humongous" regions (hr != NULL), then the | |
| 726 // end of the last one should match new_end. | |
| 727 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 728 | |
| 729 // Up to this point no concurrent thread would have been able to | |
| 730 // do any scanning on any region in this series. All the top | |
| 731 // fields still point to bottom, so the intersection between | |
| 732 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 733 // update the top fields, we'll do a storestore to make sure that | |
| 734 // no thread sees the update to top before the zeroing of the | |
| 735 // object header and the BOT initialization. | |
| 736 OrderAccess::storestore(); | |
| 737 | |
| 738 // Now that the BOT and the object header have been initialized, | |
| 739 // we can update top of the "starts humongous" region. | |
| 740 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 741 "new_top should be in this region"); | |
| 742 first_hr->set_top(new_top); | |
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743 if (_hr_printer.is_active()) { |
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744 HeapWord* bottom = first_hr->bottom(); |
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745 HeapWord* end = first_hr->orig_end(); |
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746 if ((first + 1) == last) { |
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747 // the series has a single humongous region |
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748 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
|
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749 } else { |
|
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750 // the series has more than one humongous regions |
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751 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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752 } |
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753 } |
| 2361 | 754 |
| 755 // Now, we will update the top fields of the "continues humongous" | |
| 756 // regions. The reason we need to do this is that, otherwise, | |
| 757 // these regions would look empty and this will confuse parts of | |
| 758 // G1. For example, the code that looks for a consecutive number | |
| 759 // of empty regions will consider them empty and try to | |
| 760 // re-allocate them. We can extend is_empty() to also include | |
| 761 // !continuesHumongous(), but it is easier to just update the top | |
| 762 // fields here. The way we set top for all regions (i.e., top == | |
| 763 // end for all regions but the last one, top == new_top for the | |
| 764 // last one) is actually used when we will free up the humongous | |
| 765 // region in free_humongous_region(). | |
| 766 hr = NULL; | |
|
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767 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 768 hr = region_at(i); |
| 2361 | 769 if ((i + 1) == last) { |
| 770 // last continues humongous region | |
| 771 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 772 "new_top should fall on this region"); | |
| 773 hr->set_top(new_top); | |
|
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774 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 775 } else { |
| 776 // not last one | |
| 777 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 778 hr->set_top(hr->end()); | |
|
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779 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 780 } |
| 781 } | |
| 782 // If we have continues humongous regions (hr != NULL), then the | |
| 783 // end of the last one should match new_end and its top should | |
| 784 // match new_top. | |
| 785 assert(hr == NULL || | |
| 786 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
| 787 | |
| 788 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 789 _summary_bytes_used += first_hr->used(); | |
| 790 _humongous_set.add(first_hr); | |
| 791 | |
| 792 return new_obj; | |
| 793 } | |
| 794 | |
| 342 | 795 // If could fit into free regions w/o expansion, try. |
| 796 // Otherwise, if can expand, do so. | |
| 797 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 798 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 799 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 800 | |
| 801 verify_region_sets_optional(); | |
| 342 | 802 |
|
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803 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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804 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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805 uint x_num = expansion_regions(); |
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806 uint fs = _hrs.free_suffix(); |
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807 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
| 3766 | 808 if (first == G1_NULL_HRS_INDEX) { |
| 2152 | 809 // The only thing we can do now is attempt expansion. |
|
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810 if (fs + x_num >= num_regions) { |
|
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811 // If the number of regions we're trying to allocate for this |
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812 // object is at most the number of regions in the free suffix, |
|
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813 // then the call to humongous_obj_allocate_find_first() above |
|
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814 // should have succeeded and we wouldn't be here. |
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815 // |
|
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816 // We should only be trying to expand when the free suffix is |
|
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817 // not sufficient for the object _and_ we have some expansion |
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818 // room available. |
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819 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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820 |
|
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821 ergo_verbose1(ErgoHeapSizing, |
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822 "attempt heap expansion", |
|
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823 ergo_format_reason("humongous allocation request failed") |
|
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824 ergo_format_byte("allocation request"), |
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825 word_size * HeapWordSize); |
|
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826 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
| 3766 | 827 // Even though the heap was expanded, it might not have |
| 828 // reached the desired size. So, we cannot assume that the | |
| 829 // allocation will succeed. | |
|
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830 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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831 } |
| 2152 | 832 } |
| 833 } | |
| 834 | |
| 2361 | 835 HeapWord* result = NULL; |
| 3766 | 836 if (first != G1_NULL_HRS_INDEX) { |
| 2361 | 837 result = |
| 838 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
| 839 assert(result != NULL, "it should always return a valid result"); | |
|
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840 |
|
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841 // A successful humongous object allocation changes the used space |
|
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|
842 // information of the old generation so we need to recalculate the |
|
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843 // sizes and update the jstat counters here. |
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|
844 g1mm()->update_sizes(); |
| 2152 | 845 } |
| 846 | |
| 847 verify_region_sets_optional(); | |
| 2361 | 848 |
| 849 return result; | |
| 342 | 850 } |
| 851 | |
| 1973 | 852 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 853 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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854 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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|
855 |
|
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856 unsigned int dummy_gc_count_before; |
|
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857 int dummy_gclocker_retry_count = 0; |
|
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858 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
| 342 | 859 } |
| 860 | |
| 861 HeapWord* | |
| 862 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 863 bool* gc_overhead_limit_was_exceeded) { |
| 864 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 865 |
| 10405 | 866 // Loop until the allocation is satisfied, or unsatisfied after GC. |
|
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867 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
| 1973 | 868 unsigned int gc_count_before; |
|
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|
869 |
|
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|
870 HeapWord* result = NULL; |
|
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|
871 if (!isHumongous(word_size)) { |
|
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|
872 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
|
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|
873 } else { |
|
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|
874 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
|
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|
875 } |
|
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876 if (result != NULL) { |
|
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|
877 return result; |
| 342 | 878 } |
| 879 | |
| 880 // Create the garbage collection operation... | |
| 1973 | 881 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 882 // ...and get the VM thread to execute it. |
| 883 VMThread::execute(&op); | |
| 1973 | 884 |
| 885 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 886 // If the operation was successful we'll return the result even | |
| 887 // if it is NULL. If the allocation attempt failed immediately | |
| 888 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 889 HeapWord* result = op.result(); | |
| 890 if (result != NULL && !isHumongous(word_size)) { | |
| 891 // Allocations that take place on VM operations do not do any | |
| 892 // card dirtying and we have to do it here. We only have to do | |
| 893 // this for non-humongous allocations, though. | |
| 894 dirty_young_block(result, word_size); | |
| 895 } | |
| 342 | 896 return result; |
| 1973 | 897 } else { |
|
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|
898 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
|
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|
899 return NULL; |
|
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|
900 } |
| 1973 | 901 assert(op.result() == NULL, |
| 902 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 903 } |
| 904 | |
| 905 // Give a warning if we seem to be looping forever. | |
| 906 if ((QueuedAllocationWarningCount > 0) && | |
| 907 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 908 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 909 } |
| 910 } | |
| 1973 | 911 |
| 912 ShouldNotReachHere(); | |
|
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|
913 return NULL; |
| 342 | 914 } |
| 915 | |
|
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|
916 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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|
917 unsigned int *gc_count_before_ret, |
|
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|
918 int* gclocker_retry_count_ret) { |
|
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|
919 // Make sure you read the note in attempt_allocation_humongous(). |
|
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|
920 |
|
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|
921 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
922 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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|
923 "be called for humongous allocation requests"); |
|
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|
924 |
|
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|
925 // We should only get here after the first-level allocation attempt |
|
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|
926 // (attempt_allocation()) failed to allocate. |
|
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|
927 |
|
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|
928 // We will loop until a) we manage to successfully perform the |
|
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|
929 // allocation or b) we successfully schedule a collection which |
|
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|
930 // fails to perform the allocation. b) is the only case when we'll |
|
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|
931 // return NULL. |
|
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|
932 HeapWord* result = NULL; |
|
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|
933 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
934 bool should_try_gc; |
|
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|
935 unsigned int gc_count_before; |
|
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|
936 |
|
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|
937 { |
|
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|
938 MutexLockerEx x(Heap_lock); |
|
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|
939 |
|
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|
940 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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|
941 false /* bot_updates */); |
|
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|
942 if (result != NULL) { |
|
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|
943 return result; |
|
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|
944 } |
|
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|
945 |
|
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|
946 // If we reach here, attempt_allocation_locked() above failed to |
|
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|
947 // allocate a new region. So the mutator alloc region should be NULL. |
|
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948 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
|
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|
949 |
|
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|
950 if (GC_locker::is_active_and_needs_gc()) { |
|
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951 if (g1_policy()->can_expand_young_list()) { |
|
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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|
952 // No need for an ergo verbose message here, |
|
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7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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953 // can_expand_young_list() does this when it returns true. |
|
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|
954 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
|
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|
955 false /* bot_updates */); |
|
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|
956 if (result != NULL) { |
|
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|
957 return result; |
|
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|
958 } |
|
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|
959 } |
|
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|
960 should_try_gc = false; |
|
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|
961 } else { |
|
6106
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|
962 // The GCLocker may not be active but the GCLocker initiated |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
963 // GC may not yet have been performed (GCLocker::needs_gc() |
|
1d478c993020
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|
964 // returns true). In this case we do not try this GC and |
|
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
965 // wait until the GCLocker initiated GC is performed, and |
|
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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966 // then retry the allocation. |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
967 if (GC_locker::needs_gc()) { |
|
1d478c993020
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|
968 should_try_gc = false; |
|
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969 } else { |
|
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|
970 // Read the GC count while still holding the Heap_lock. |
|
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
971 gc_count_before = total_collections(); |
|
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|
972 should_try_gc = true; |
|
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|
973 } |
|
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|
974 } |
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|
975 } |
|
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976 |
|
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|
977 if (should_try_gc) { |
|
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|
978 bool succeeded; |
|
12113
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8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
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|
979 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
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|
980 GCCause::_g1_inc_collection_pause); |
|
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981 if (result != NULL) { |
|
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|
982 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
983 return result; |
|
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|
984 } |
|
abdfc822206f
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|
985 |
|
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|
986 if (succeeded) { |
|
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|
987 // If we get here we successfully scheduled a collection which |
|
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|
988 // failed to allocate. No point in trying to allocate |
|
abdfc822206f
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|
989 // further. We'll just return NULL. |
|
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|
990 MutexLockerEx x(Heap_lock); |
|
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
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|
991 *gc_count_before_ret = total_collections(); |
|
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|
992 return NULL; |
|
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|
993 } |
|
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994 } else { |
|
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995 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
2e093b564241
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|
996 MutexLockerEx x(Heap_lock); |
|
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|
997 *gc_count_before_ret = total_collections(); |
|
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7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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|
998 return NULL; |
|
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|
999 } |
|
6106
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
1000 // The GCLocker is either active or the GCLocker initiated |
|
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diff
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|
1001 // GC has not yet been performed. Stall until it is and |
|
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|
1002 // then retry the allocation. |
|
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|
1003 GC_locker::stall_until_clear(); |
|
8853
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|
1004 (*gclocker_retry_count_ret) += 1; |
|
2433
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|
1005 } |
|
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|
1006 |
| 10405 | 1007 // We can reach here if we were unsuccessful in scheduling a |
|
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|
1008 // collection (because another thread beat us to it) or if we were |
|
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7023069: G1: Introduce symmetric locking in the slow allocation path
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|
1009 // stalled due to the GC locker. In either can we should retry the |
|
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|
1010 // allocation attempt in case another thread successfully |
|
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|
1011 // performed a collection and reclaimed enough space. We do the |
|
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|
1012 // first attempt (without holding the Heap_lock) here and the |
|
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|
1013 // follow-on attempt will be at the start of the next loop |
|
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|
1014 // iteration (after taking the Heap_lock). |
|
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|
1015 result = _mutator_alloc_region.attempt_allocation(word_size, |
|
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|
1016 false /* bot_updates */); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
1017 if (result != NULL) { |
|
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abdfc822206f
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|
1018 return result; |
|
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|
1019 } |
|
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|
1020 |
|
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|
1021 // Give a warning if we seem to be looping forever. |
|
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|
1022 if ((QueuedAllocationWarningCount > 0) && |
|
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|
1023 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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|
1024 warning("G1CollectedHeap::attempt_allocation_slow() " |
|
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|
1025 "retries %d times", try_count); |
|
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|
1026 } |
|
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|
1027 } |
|
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|
1028 |
|
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|
1029 ShouldNotReachHere(); |
|
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|
1030 return NULL; |
|
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|
1031 } |
|
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|
1032 |
|
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|
1033 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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|
1034 unsigned int * gc_count_before_ret, |
|
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|
1035 int* gclocker_retry_count_ret) { |
|
2433
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|
1036 // The structure of this method has a lot of similarities to |
|
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|
1037 // attempt_allocation_slow(). The reason these two were not merged |
|
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|
1038 // into a single one is that such a method would require several "if |
|
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|
1039 // allocation is not humongous do this, otherwise do that" |
|
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|
1040 // conditional paths which would obscure its flow. In fact, an early |
|
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|
1041 // version of this code did use a unified method which was harder to |
|
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|
1042 // follow and, as a result, it had subtle bugs that were hard to |
|
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|
1043 // track down. So keeping these two methods separate allows each to |
|
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|
1044 // be more readable. It will be good to keep these two in sync as |
|
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|
1045 // much as possible. |
|
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|
1046 |
|
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|
1047 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
1048 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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|
1049 "should only be called for humongous allocations"); |
|
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|
1050 |
|
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1051 // 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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|
1052 // need to start a marking cycle at each humongous object allocation. We do |
|
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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4833
diff
changeset
|
1053 // 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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|
1054 // 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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|
1055 // allocated memory while we do a GC. |
|
4910
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|
1056 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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|
1057 word_size)) { |
|
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1058 collect(GCCause::_g1_humongous_allocation); |
|
6a78aa6ac1ff
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|
1059 } |
|
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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|
1060 |
|
2433
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|
1061 // We will loop until a) we manage to successfully perform the |
|
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|
1062 // allocation or b) we successfully schedule a collection which |
|
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|
1063 // fails to perform the allocation. b) is the only case when we'll |
|
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1064 // return NULL. |
|
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1065 HeapWord* result = NULL; |
|
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1066 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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1067 bool should_try_gc; |
|
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1068 unsigned int gc_count_before; |
|
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1069 |
|
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|
1070 { |
|
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1071 MutexLockerEx x(Heap_lock); |
|
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1072 |
|
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1073 // Given that humongous objects are not allocated in young |
|
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1074 // regions, we'll first try to do the allocation without doing a |
|
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1075 // collection hoping that there's enough space in the heap. |
|
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1076 result = humongous_obj_allocate(word_size); |
|
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1077 if (result != NULL) { |
|
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1078 return result; |
|
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1079 } |
|
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1080 |
|
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1081 if (GC_locker::is_active_and_needs_gc()) { |
|
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1082 should_try_gc = false; |
|
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1083 } else { |
|
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1084 // The GCLocker may not be active but the GCLocker initiated |
|
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1085 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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1086 // returns true). In this case we do not try this GC and |
|
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1087 // wait until the GCLocker initiated GC is performed, and |
|
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1088 // then retry the allocation. |
|
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1089 if (GC_locker::needs_gc()) { |
|
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1090 should_try_gc = false; |
|
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1091 } else { |
|
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1092 // Read the GC count while still holding the Heap_lock. |
|
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1093 gc_count_before = total_collections(); |
|
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1094 should_try_gc = true; |
|
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1095 } |
|
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1096 } |
|
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1097 } |
|
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1098 |
|
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1099 if (should_try_gc) { |
|
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1100 // If we failed to allocate the humongous object, we should try to |
|
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1101 // do a collection pause (if we're allowed) in case it reclaims |
|
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1102 // enough space for the allocation to succeed after the pause. |
|
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1103 |
|
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|
1104 bool succeeded; |
|
12113
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|
1105 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
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|
1106 GCCause::_g1_humongous_allocation); |
|
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1107 if (result != NULL) { |
|
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1108 assert(succeeded, "only way to get back a non-NULL result"); |
|
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1109 return result; |
|
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1110 } |
|
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1111 |
|
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1112 if (succeeded) { |
|
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|
1113 // If we get here we successfully scheduled a collection which |
|
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1114 // failed to allocate. No point in trying to allocate |
|
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1115 // further. We'll just return NULL. |
|
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1116 MutexLockerEx x(Heap_lock); |
|
4910
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1117 *gc_count_before_ret = total_collections(); |
|
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1118 return NULL; |
|
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1119 } |
|
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1120 } else { |
|
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|
1121 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
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|
1122 MutexLockerEx x(Heap_lock); |
|
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|
1123 *gc_count_before_ret = total_collections(); |
|
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1124 return NULL; |
|
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1125 } |
|
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1126 // The GCLocker is either active or the GCLocker initiated |
|
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|
1127 // GC has not yet been performed. Stall until it is and |
|
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1128 // then retry the allocation. |
|
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1129 GC_locker::stall_until_clear(); |
|
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|
1130 (*gclocker_retry_count_ret) += 1; |
|
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1131 } |
|
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|
1132 |
| 10405 | 1133 // We can reach here if we were unsuccessful in scheduling a |
|
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|
1134 // collection (because another thread beat us to it) or if we were |
|
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1135 // stalled due to the GC locker. In either can we should retry the |
|
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|
1136 // allocation attempt in case another thread successfully |
|
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1137 // performed a collection and reclaimed enough space. Give a |
|
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|
1138 // warning if we seem to be looping forever. |
|
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|
1139 |
|
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|
1140 if ((QueuedAllocationWarningCount > 0) && |
|
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|
1141 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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|
1142 warning("G1CollectedHeap::attempt_allocation_humongous() " |
|
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|
1143 "retries %d times", try_count); |
|
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|
1144 } |
|
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|
1145 } |
|
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|
1146 |
|
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|
1147 ShouldNotReachHere(); |
|
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|
1148 return NULL; |
|
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|
1149 } |
|
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|
1150 |
|
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|
1151 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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|
1152 bool expect_null_mutator_alloc_region) { |
| 2152 | 1153 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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|
1154 assert(_mutator_alloc_region.get() == NULL || |
|
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|
1155 !expect_null_mutator_alloc_region, |
|
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|
1156 "the current alloc region was unexpectedly found to be non-NULL"); |
|
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|
1157 |
|
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|
1158 if (!isHumongous(word_size)) { |
|
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|
1159 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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|
1160 false /* bot_updates */); |
|
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|
1161 } else { |
|
4829
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|
1162 HeapWord* result = humongous_obj_allocate(word_size); |
|
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|
1163 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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|
1164 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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|
1165 } |
|
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|
1166 return result; |
|
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|
1167 } |
|
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|
1168 |
|
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|
1169 ShouldNotReachHere(); |
| 342 | 1170 } |
| 1171 | |
| 1172 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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|
1173 G1CollectedHeap* _g1h; |
| 342 | 1174 ModRefBarrierSet* _mr_bs; |
| 1175 public: | |
|
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1176 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
| 12080 | 1177 _g1h(g1h), _mr_bs(mr_bs) {} |
| 1178 | |
| 342 | 1179 bool doHeapRegion(HeapRegion* r) { |
| 12080 | 1180 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1181 | |
|
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|
1182 if (r->continuesHumongous()) { |
| 12080 | 1183 // We'll assert that the strong code root list and RSet is empty |
| 1184 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
| 1185 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
| 342 | 1186 return false; |
|
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|
1187 } |
| 12080 | 1188 |
|
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|
1189 _g1h->reset_gc_time_stamps(r); |
| 12080 | 1190 hrrs->clear(); |
| 342 | 1191 // You might think here that we could clear just the cards |
| 1192 // corresponding to the used region. But no: if we leave a dirty card | |
| 1193 // in a region we might allocate into, then it would prevent that card | |
| 1194 // from being enqueued, and cause it to be missed. | |
| 1195 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1196 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 12080 | 1197 |
| 342 | 1198 return false; |
| 1199 } | |
| 1200 }; | |
| 1201 | |
|
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|
1202 void G1CollectedHeap::clear_rsets_post_compaction() { |
| 12343 | 1203 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
|
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|
1204 heap_region_iterate(&rs_clear); |
|
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1205 } |
| 342 | 1206 |
|
626
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1207 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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1208 G1CollectedHeap* _g1h; |
|
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1209 UpdateRSOopClosure _cl; |
|
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|
1210 int _worker_i; |
|
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|
1211 public: |
|
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|
1212 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1213 _cl(g1->g1_rem_set(), worker_i), |
|
626
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1214 _worker_i(worker_i), |
|
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|
1215 _g1h(g1) |
|
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|
1216 { } |
|
1960
878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
johnc
parents:
1883
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|
1217 |
|
626
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|
1218 bool doHeapRegion(HeapRegion* r) { |
|
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1219 if (!r->continuesHumongous()) { |
|
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1220 _cl.set_from(r); |
|
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1221 r->oop_iterate(&_cl); |
|
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|
1222 } |
|
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|
1223 return false; |
|
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|
1224 } |
|
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|
1225 }; |
|
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|
1226 |
|
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|
1227 class ParRebuildRSTask: public AbstractGangTask { |
|
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1228 G1CollectedHeap* _g1; |
|
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1229 public: |
|
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|
1230 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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1231 : AbstractGangTask("ParRebuildRSTask"), |
|
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1232 _g1(g1) |
|
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1233 { } |
|
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|
1234 |
|
4728
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|
1235 void work(uint worker_id) { |
|
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|
1236 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
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|
1237 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
bca17e38de00
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|
1238 _g1->workers()->active_workers(), |
|
626
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|
1239 HeapRegion::RebuildRSClaimValue); |
|
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|
1240 } |
|
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|
1241 }; |
|
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|
1242 |
|
3778
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|
1243 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
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|
1244 private: |
|
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|
1245 G1HRPrinter* _hr_printer; |
|
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|
1246 public: |
|
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|
1247 bool doHeapRegion(HeapRegion* hr) { |
|
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|
1248 assert(!hr->is_young(), "not expecting to find young regions"); |
|
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1249 // We only generate output for non-empty regions. |
|
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1250 if (!hr->is_empty()) { |
|
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|
1251 if (!hr->isHumongous()) { |
|
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|
1252 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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|
1253 } else if (hr->startsHumongous()) { |
|
6254
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1254 if (hr->region_num() == 1) { |
|
3778
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|
1255 // single humongous region |
|
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|
1256 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
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|
1257 } else { |
|
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|
1258 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
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|
1259 } |
|
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|
1260 } else { |
|
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|
1261 assert(hr->continuesHumongous(), "only way to get here"); |
|
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|
1262 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
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|
1263 } |
|
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|
1264 } |
|
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|
1265 return false; |
|
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|
1266 } |
|
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|
1267 |
|
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|
1268 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
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|
1269 : _hr_printer(hr_printer) { } |
|
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|
1270 }; |
|
5f6f2615433a
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|
1271 |
|
6254
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|
1272 void G1CollectedHeap::print_hrs_post_compaction() { |
|
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|
1273 PostCompactionPrinterClosure cl(hr_printer()); |
|
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|
1274 heap_region_iterate(&cl); |
|
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|
1275 } |
|
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|
1276 |
| 1973 | 1277 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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changeset
|
1278 bool clear_all_soft_refs, |
| 342 | 1279 size_t word_size) { |
| 2152 | 1280 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1281 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1282 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1283 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1284 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
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1313
diff
changeset
|
1285 |
| 10405 | 1286 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
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13062
diff
changeset
|
1287 gc_timer->register_gc_start(); |
| 10405 | 1288 |
| 1289 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
| 1290 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
| 1291 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1292 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1293 ResourceMark rm; |
| 1294 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
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|
1295 print_heap_before_gc(); |
| 10405 | 1296 trace_heap_before_gc(gc_tracer); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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|
1297 |
|
17866
270d7cb38f40
8038934: Remove prefix allocated_ from methods and variables in Metaspace
ehelin
parents:
17844
diff
changeset
|
1298 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1299 |
| 2152 | 1300 verify_region_sets_optional(); |
| 342 | 1301 |
|
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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changeset
|
1302 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
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|
1303 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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|
1304 |
|
0bfd3fb24150
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jmasa
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changeset
|
1305 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
0bfd3fb24150
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|
1306 |
| 342 | 1307 { |
| 1308 IsGCActiveMark x; | |
| 1309 | |
| 1310 // Timing | |
| 6030 | 1311 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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|
1312 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
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|
1313 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1314 |
| 342 | 1315 { |
| 10405 | 1316 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL); |
|
10098
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|
1317 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
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|
1318 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
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|
1319 |
|
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|
1320 double start = os::elapsedTime(); |
|
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|
1321 g1_policy()->record_full_collection_start(); |
|
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|
1322 |
|
71013d764f6e
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|
1323 // Note: When we have a more flexible GC logging framework that |
|
71013d764f6e
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|
1324 // allows us to add optional attributes to a GC log record we |
|
71013d764f6e
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|
1325 // could consider timing and reporting how long we wait in the |
|
71013d764f6e
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|
1326 // following two methods. |
|
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|
1327 wait_while_free_regions_coming(); |
|
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|
1328 // If we start the compaction before the CM threads finish |
|
71013d764f6e
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|
1329 // scanning the root regions we might trip them over as we'll |
|
71013d764f6e
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|
1330 // be moving objects / updating references. So let's wait until |
|
71013d764f6e
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|
1331 // they are done. By telling them to abort, they should complete |
|
71013d764f6e
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|
1332 // early. |
|
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|
1333 _cm->root_regions()->abort(); |
|
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|
1334 _cm->root_regions()->wait_until_scan_finished(); |
|
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|
1335 append_secondary_free_list_if_not_empty_with_lock(); |
|
71013d764f6e
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|
1336 |
|
71013d764f6e
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|
1337 gc_prologue(true); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1338 increment_total_collections(true /* full gc */); |
|
71013d764f6e
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changeset
|
1339 increment_old_marking_cycles_started(); |
|
71013d764f6e
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|
1340 |
|
71013d764f6e
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|
1341 assert(used() == recalculate_used(), "Should be equal"); |
|
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1342 |
|
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1343 verify_before_gc(); |
|
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1344 |
| 10405 | 1345 pre_full_gc_dump(gc_timer); |
|
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1346 |
|
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1347 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
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1348 |
|
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1349 // Disable discovery and empty the discovered lists |
|
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1350 // for the CM ref processor. |
|
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1351 ref_processor_cm()->disable_discovery(); |
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1352 ref_processor_cm()->abandon_partial_discovery(); |
|
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1353 ref_processor_cm()->verify_no_references_recorded(); |
|
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1354 |
|
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1355 // Abandon current iterations of concurrent marking and concurrent |
|
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1356 // refinement, if any are in progress. We have to do this before |
|
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1357 // wait_until_scan_finished() below. |
|
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|
1358 concurrent_mark()->abort(); |
|
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1359 |
|
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1360 // Make sure we'll choose a new allocation region afterwards. |
|
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1361 release_mutator_alloc_region(); |
|
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1362 abandon_gc_alloc_regions(); |
|
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1363 g1_rem_set()->cleanupHRRS(); |
|
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1364 |
|
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1365 // We should call this after we retire any currently active alloc |
|
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1366 // regions so that all the ALLOC / RETIRE events are generated |
|
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1367 // before the start GC event. |
|
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1368 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
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1369 |
|
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1370 // We may have added regions to the current incremental collection |
|
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1371 // set between the last GC or pause and now. We need to clear the |
|
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1372 // incremental collection set and then start rebuilding it afresh |
|
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1373 // after this full GC. |
|
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1374 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
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1375 g1_policy()->clear_incremental_cset(); |
|
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1376 g1_policy()->stop_incremental_cset_building(); |
|
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1377 |
|
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1378 tear_down_region_sets(false /* free_list_only */); |
|
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1379 g1_policy()->set_gcs_are_young(true); |
|
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1380 |
|
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1381 // See the comments in g1CollectedHeap.hpp and |
|
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1382 // G1CollectedHeap::ref_processing_init() about |
|
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1383 // how reference processing currently works in G1. |
|
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1384 |
|
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1385 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
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1386 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
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|
1387 |
|
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1388 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
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1389 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
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|
1390 |
|
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|
1391 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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1392 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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1393 |
|
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|
1394 // Do collection work |
|
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|
1395 { |
|
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|
1396 HandleMark hm; // Discard invalid handles created during gc |
|
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|
1397 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
|
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|
1398 } |
|
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|
1399 |
|
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1400 assert(free_regions() == 0, "we should not have added any free regions"); |
|
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1401 rebuild_region_sets(false /* free_list_only */); |
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1402 |
|
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1403 // Enqueue any discovered reference objects that have |
|
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1404 // not been removed from the discovered lists. |
|
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1405 ref_processor_stw()->enqueue_discovered_references(); |
|
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1406 |
|
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1407 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
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1408 |
|
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|
1409 MemoryService::track_memory_usage(); |
|
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1410 |
|
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1411 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
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1412 ref_processor_stw()->verify_no_references_recorded(); |
|
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1413 |
|
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1414 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
|
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|
1415 ClassLoaderDataGraph::purge(); |
| 12080 | 1416 MetaspaceAux::verify_metrics(); |
|
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1417 |
|
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1418 // Note: since we've just done a full GC, concurrent |
|
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1419 // marking is no longer active. Therefore we need not |
|
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1420 // re-enable reference discovery for the CM ref processor. |
|
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1421 // That will be done at the start of the next marking cycle. |
|
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1422 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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|
1423 ref_processor_cm()->verify_no_references_recorded(); |
|
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1424 |
|
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|
1425 reset_gc_time_stamp(); |
|
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1426 // Since everything potentially moved, we will clear all remembered |
| 10405 | 1427 // sets, and clear all cards. Later we will rebuild remembered |
|
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1428 // sets. We will also reset the GC time stamps of the regions. |
|
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|
1429 clear_rsets_post_compaction(); |
|
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|
1430 check_gc_time_stamps(); |
|
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|
1431 |
|
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|
1432 // Resize the heap if necessary. |
|
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|
1433 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
|
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1434 |
|
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|
1435 if (_hr_printer.is_active()) { |
|
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1436 // We should do this after we potentially resize the heap so |
|
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1437 // that all the COMMIT / UNCOMMIT events are generated before |
|
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|
1438 // the end GC event. |
|
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|
1439 |
|
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|
1440 print_hrs_post_compaction(); |
|
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|
1441 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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1442 } |
|
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|
1443 |
|
10246
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|
1444 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
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|
1445 if (hot_card_cache->use_cache()) { |
|
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|
1446 hot_card_cache->reset_card_counts(); |
|
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|
1447 hot_card_cache->reset_hot_cache(); |
|
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|
1448 } |
|
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|
1449 |
|
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|
1450 // Rebuild remembered sets of all regions. |
|
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|
1451 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
1452 uint n_workers = |
|
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|
1453 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1454 workers()->active_workers(), |
|
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|
1455 Threads::number_of_non_daemon_threads()); |
|
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|
1456 assert(UseDynamicNumberOfGCThreads || |
|
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|
1457 n_workers == workers()->total_workers(), |
|
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|
1458 "If not dynamic should be using all the workers"); |
|
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|
1459 workers()->set_active_workers(n_workers); |
|
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|
1460 // Set parallel threads in the heap (_n_par_threads) only |
|
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|
1461 // before a parallel phase and always reset it to 0 after |
|
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|
1462 // the phase so that the number of parallel threads does |
|
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|
1463 // no get carried forward to a serial phase where there |
|
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|
1464 // may be code that is "possibly_parallel". |
|
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|
1465 set_par_threads(n_workers); |
|
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|
1466 |
|
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|
1467 ParRebuildRSTask rebuild_rs_task(this); |
|
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|
1468 assert(check_heap_region_claim_values( |
|
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|
1469 HeapRegion::InitialClaimValue), "sanity check"); |
|
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|
1470 assert(UseDynamicNumberOfGCThreads || |
|
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|
1471 workers()->active_workers() == workers()->total_workers(), |
|
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|
1472 "Unless dynamic should use total workers"); |
|
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|
1473 // Use the most recent number of active workers |
|
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|
1474 assert(workers()->active_workers() > 0, |
|
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|
1475 "Active workers not properly set"); |
|
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|
1476 set_par_threads(workers()->active_workers()); |
|
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|
1477 workers()->run_task(&rebuild_rs_task); |
|
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|
1478 set_par_threads(0); |
|
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|
1479 assert(check_heap_region_claim_values( |
|
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|
1480 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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|
1481 reset_heap_region_claim_values(); |
|
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|
1482 } else { |
|
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|
1483 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1484 heap_region_iterate(&rebuild_rs); |
|
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|
1485 } |
|
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|
1486 |
| 12080 | 1487 // Rebuild the strong code root lists for each region |
| 1488 rebuild_strong_code_roots(); | |
| 1489 | |
|
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|
1490 if (true) { // FIXME |
|
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|
1491 MetaspaceGC::compute_new_size(); |
|
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|
1492 } |
| 342 | 1493 |
|
546
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|
1494 #ifdef TRACESPINNING |
|
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|
1495 ParallelTaskTerminator::print_termination_counts(); |
|
546
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diff
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|
1496 #endif |
|
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|
1497 |
|
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|
1498 // Discard all rset updates |
|
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|
1499 JavaThread::dirty_card_queue_set().abandon_logs(); |
|
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|
1500 assert(!G1DeferredRSUpdate |
|
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|
1501 || (G1DeferredRSUpdate && |
|
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|
1502 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
|
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|
1503 |
|
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|
1504 _young_list->reset_sampled_info(); |
|
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|
1505 // At this point there should be no regions in the |
|
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|
1506 // entire heap tagged as young. |
|
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|
1507 assert(check_young_list_empty(true /* check_heap */), |
|
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|
1508 "young list should be empty at this point"); |
|
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|
1509 |
|
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|
1510 // Update the number of full collections that have been completed. |
|
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|
1511 increment_old_marking_cycles_completed(false /* concurrent */); |
|
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|
1512 |
|
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|
1513 _hrs.verify_optional(); |
|
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|
1514 verify_region_sets_optional(); |
|
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|
1515 |
|
10373
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|
1516 verify_after_gc(); |
|
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|
1517 |
|
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|
1518 // Start a new incremental collection set for the next pause |
|
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|
1519 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
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|
1520 g1_policy()->start_incremental_cset_building(); |
|
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|
1521 |
|
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|
1522 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
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|
1523 // regions to the incremental collection set for the next |
|
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|
1524 // evacuation pause. |
|
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|
1525 clear_cset_fast_test(); |
|
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|
1526 |
|
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|
1527 init_mutator_alloc_region(); |
|
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|
1528 |
|
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|
1529 double end = os::elapsedTime(); |
|
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|
1530 g1_policy()->record_full_collection_end(); |
|
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|
1531 |
|
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|
1532 if (G1Log::fine()) { |
|
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|
1533 g1_policy()->print_heap_transition(); |
|
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|
1534 } |
|
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|
1535 |
|
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|
1536 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
|
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|
1537 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
|
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|
1538 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
|
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|
1539 // before any GC notifications are raised. |
|
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|
1540 g1mm()->update_sizes(); |
|
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|
1541 |
|
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|
1542 gc_epilogue(true); |
|
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|
1543 } |
|
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|
1544 |
|
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|
1545 if (G1Log::finer()) { |
|
10291
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|
1546 g1_policy()->print_detailed_heap_transition(true /* full */); |
|
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|
1547 } |
|
6121
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|
1548 |
|
b9442ac22f59
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|
1549 print_heap_after_gc(); |
| 10405 | 1550 trace_heap_after_gc(gc_tracer); |
| 1551 | |
| 1552 post_full_gc_dump(gc_timer); | |
| 1553 | |
|
13400
86e6d691f2e1
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|
1554 gc_timer->register_gc_end(); |
| 10405 | 1555 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
|
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|
1556 } |
| 1973 | 1557 |
| 1558 return true; | |
| 342 | 1559 } |
| 1560 | |
| 1561 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1562 // do_collection() will return whether it succeeded in performing |
| 1563 // the GC. Currently, there is no facility on the | |
| 1564 // do_full_collection() API to notify the caller than the collection | |
| 1565 // did not succeed (e.g., because it was locked out by the GC | |
| 1566 // locker). So, right now, we'll ignore the return value. | |
| 1567 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1568 clear_all_soft_refs, | |
| 1569 0 /* word_size */); | |
| 342 | 1570 } |
| 1571 | |
| 1572 // This code is mostly copied from TenuredGeneration. | |
| 1573 void | |
| 1574 G1CollectedHeap:: | |
| 1575 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1576 // Include the current allocation, if any, and bytes that will be | |
| 1577 // pre-allocated to support collections, as "used". | |
| 1578 const size_t used_after_gc = used(); | |
| 1579 const size_t capacity_after_gc = capacity(); | |
| 1580 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1581 | |
|
1717
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|
1582 // This is enforced in arguments.cpp. |
|
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|
1583 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
|
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|
1584 "otherwise the code below doesn't make sense"); |
|
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|
1585 |
| 342 | 1586 // We don't have floating point command-line arguments |
|
1717
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|
1587 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1588 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
1717
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|
1589 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1590 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1591 | |
|
1717
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|
1592 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
|
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|
1593 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
|
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|
1594 |
|
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|
1595 // We have to be careful here as these two calculations can overflow |
|
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|
1596 // 32-bit size_t's. |
|
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|
1597 double used_after_gc_d = (double) used_after_gc; |
|
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|
1598 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
|
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|
1599 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
|
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|
1600 |
|
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|
1601 // Let's make sure that they are both under the max heap size, which |
|
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|
1602 // by default will make them fit into a size_t. |
|
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|
1603 double desired_capacity_upper_bound = (double) max_heap_size; |
|
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|
1604 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
|
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1605 desired_capacity_upper_bound); |
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1606 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1607 desired_capacity_upper_bound); |
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1608 |
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1609 // We can now safely turn them into size_t's. |
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1610 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1611 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1612 |
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1613 // This assert only makes sense here, before we adjust them |
|
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1614 // with respect to the min and max heap size. |
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1615 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1616 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1617 "maximum_desired_capacity = "SIZE_FORMAT, |
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1618 minimum_desired_capacity, maximum_desired_capacity)); |
|
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1619 |
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1620 // Should not be greater than the heap max size. No need to adjust |
|
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1621 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1622 // we'll try to make the capacity larger than it, not smaller). |
|
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1623 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
|
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1624 // Should not be less than the heap min size. No need to adjust it |
|
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1625 // with respect to the heap max size as it's an upper bound (i.e., |
|
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1626 // we'll try to make the capacity smaller than it, not greater). |
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1627 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1628 |
|
1717
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1629 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1630 // Don't expand unless it's significant |
| 1631 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1632 ergo_verbose4(ErgoHeapSizing, |
|
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1633 "attempt heap expansion", |
|
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|
1634 ergo_format_reason("capacity lower than " |
|
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1635 "min desired capacity after Full GC") |
|
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|
1636 ergo_format_byte("capacity") |
|
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|
1637 ergo_format_byte("occupancy") |
|
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|
1638 ergo_format_byte_perc("min desired capacity"), |
|
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1639 capacity_after_gc, used_after_gc, |
|
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|
1640 minimum_desired_capacity, (double) MinHeapFreeRatio); |
|
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|
1641 expand(expand_bytes); |
| 342 | 1642 |
| 1643 // No expansion, now see if we want to shrink | |
|
1717
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|
1644 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1645 // Capacity too large, compute shrinking size |
| 1646 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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|
1647 ergo_verbose4(ErgoHeapSizing, |
|
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1648 "attempt heap shrinking", |
|
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|
1649 ergo_format_reason("capacity higher than " |
|
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|
1650 "max desired capacity after Full GC") |
|
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|
1651 ergo_format_byte("capacity") |
|
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|
1652 ergo_format_byte("occupancy") |
|
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|
1653 ergo_format_byte_perc("max desired capacity"), |
|
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|
1654 capacity_after_gc, used_after_gc, |
|
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|
1655 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1656 shrink(shrink_bytes); |
| 1657 } | |
| 1658 } | |
| 1659 | |
| 1660 | |
| 1661 HeapWord* | |
| 1973 | 1662 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1663 bool* succeeded) { | |
| 2152 | 1664 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1665 |
| 1666 *succeeded = true; | |
| 1667 // Let's attempt the allocation first. | |
|
2433
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|
1668 HeapWord* result = |
|
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|
1669 attempt_allocation_at_safepoint(word_size, |
|
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|
1670 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1671 if (result != NULL) { |
| 1672 assert(*succeeded, "sanity"); | |
| 1673 return result; | |
| 1674 } | |
| 342 | 1675 |
| 1676 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1677 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1678 // expansion over collection. (This might change in the future if we can | |
| 1679 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1680 result = expand_and_allocate(word_size); | |
| 1681 if (result != NULL) { | |
| 1973 | 1682 assert(*succeeded, "sanity"); |
| 342 | 1683 return result; |
| 1684 } | |
| 1685 | |
| 1973 | 1686 // Expansion didn't work, we'll try to do a Full GC. |
| 1687 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1688 false, /* clear_all_soft_refs */ | |
| 1689 word_size); | |
| 1690 if (!gc_succeeded) { | |
| 1691 *succeeded = false; | |
| 1692 return NULL; | |
| 1693 } | |
| 1694 | |
| 1695 // Retry the allocation | |
| 1696 result = attempt_allocation_at_safepoint(word_size, | |
|
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|
1697 true /* expect_null_mutator_alloc_region */); |
| 342 | 1698 if (result != NULL) { |
| 1973 | 1699 assert(*succeeded, "sanity"); |
| 342 | 1700 return result; |
| 1701 } | |
| 1702 | |
| 1973 | 1703 // Then, try a Full GC that will collect all soft references. |
| 1704 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1705 true, /* clear_all_soft_refs */ | |
| 1706 word_size); | |
| 1707 if (!gc_succeeded) { | |
| 1708 *succeeded = false; | |
| 1709 return NULL; | |
| 1710 } | |
| 1711 | |
| 1712 // Retry the allocation once more | |
| 1713 result = attempt_allocation_at_safepoint(word_size, | |
|
2433
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|
1714 true /* expect_null_mutator_alloc_region */); |
| 342 | 1715 if (result != NULL) { |
| 1973 | 1716 assert(*succeeded, "sanity"); |
| 342 | 1717 return result; |
| 1718 } | |
| 1719 | |
|
1387
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6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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|
1720 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1721 "Flag should have been handled and cleared prior to this point"); |
|
1387
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|
1722 |
| 342 | 1723 // What else? We might try synchronous finalization later. If the total |
| 1724 // space available is large enough for the allocation, then a more | |
| 1725 // complete compaction phase than we've tried so far might be | |
| 1726 // appropriate. | |
| 1973 | 1727 assert(*succeeded, "sanity"); |
| 342 | 1728 return NULL; |
| 1729 } | |
| 1730 | |
| 1731 // Attempting to expand the heap sufficiently | |
| 1732 // to support an allocation of the given "word_size". If | |
| 1733 // successful, perform the allocation and return the address of the | |
| 1734 // allocated block, or else "NULL". | |
| 1735 | |
| 1736 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1737 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1738 | |
| 1739 verify_region_sets_optional(); | |
| 1973 | 1740 |
|
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|
1741 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
3914
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|
1742 ergo_verbose1(ErgoHeapSizing, |
|
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|
1743 "attempt heap expansion", |
|
20213c8a3c40
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|
1744 ergo_format_reason("allocation request failed") |
|
20213c8a3c40
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|
1745 ergo_format_byte("allocation request"), |
|
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|
1746 word_size * HeapWordSize); |
|
2188
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|
1747 if (expand(expand_bytes)) { |
| 3766 | 1748 _hrs.verify_optional(); |
|
2188
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|
1749 verify_region_sets_optional(); |
|
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|
1750 return attempt_allocation_at_safepoint(word_size, |
|
2433
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|
1751 false /* expect_null_mutator_alloc_region */); |
|
2188
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|
1752 } |
|
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|
1753 return NULL; |
| 342 | 1754 } |
| 1755 | |
| 3766 | 1756 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
| 1757 HeapWord* new_end) { | |
| 1758 assert(old_end != new_end, "don't call this otherwise"); | |
| 1759 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
| 1760 | |
| 1761 // Update the committed mem region. | |
| 1762 _g1_committed.set_end(new_end); | |
| 1763 // Tell the card table about the update. | |
| 1764 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
| 1765 // Tell the BOT about the update. | |
| 1766 _bot_shared->resize(_g1_committed.word_size()); | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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|
1767 // Tell the hot card cache about the update |
|
194f52aa2f23
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|
1768 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
| 3766 | 1769 } |
| 1770 | |
|
2188
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|
1771 bool G1CollectedHeap::expand(size_t expand_bytes) { |
|
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|
1772 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1773 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1774 HeapRegion::GrainBytes); | |
|
3914
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|
1775 ergo_verbose2(ErgoHeapSizing, |
|
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|
1776 "expand the heap", |
|
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|
1777 ergo_format_byte("requested expansion amount") |
|
20213c8a3c40
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|
1778 ergo_format_byte("attempted expansion amount"), |
|
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|
1779 expand_bytes, aligned_expand_bytes); |
|
2188
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|
1780 |
|
12345
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|
1781 if (_g1_storage.uncommitted_size() == 0) { |
|
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|
1782 ergo_verbose0(ErgoHeapSizing, |
|
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|
1783 "did not expand the heap", |
|
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|
1784 ergo_format_reason("heap already fully expanded")); |
|
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|
1785 return false; |
|
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|
1786 } |
|
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|
1787 |
| 3766 | 1788 // First commit the memory. |
| 1789 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
|
2188
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|
1790 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
|
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|
1791 if (successful) { |
| 3766 | 1792 // Then propagate this update to the necessary data structures. |
| 1793 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
| 1794 update_committed_space(old_end, new_end); | |
| 1795 | |
| 1796 FreeRegionList expansion_list("Local Expansion List"); | |
| 1797 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
| 1798 assert(mr.start() == old_end, "post-condition"); | |
| 1799 // mr might be a smaller region than what was requested if | |
| 1800 // expand_by() was unable to allocate the HeapRegion instances | |
| 1801 assert(mr.end() <= new_end, "post-condition"); | |
| 1802 | |
| 1803 size_t actual_expand_bytes = mr.byte_size(); | |
| 1804 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
| 1805 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
| 1806 "post-condition"); | |
| 1807 if (actual_expand_bytes < aligned_expand_bytes) { | |
| 1808 // We could not expand _hrs to the desired size. In this case we | |
| 1809 // need to shrink the committed space accordingly. | |
| 1810 assert(mr.end() < new_end, "invariant"); | |
| 1811 | |
| 1812 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
| 1813 // First uncommit the memory. | |
| 1814 _g1_storage.shrink_by(diff_bytes); | |
| 1815 // Then propagate this update to the necessary data structures. | |
| 1816 update_committed_space(new_end, mr.end()); | |
|
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1817 } |
| 3766 | 1818 _free_list.add_as_tail(&expansion_list); |
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1819 |
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1820 if (_hr_printer.is_active()) { |
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1821 HeapWord* curr = mr.start(); |
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1822 while (curr < mr.end()) { |
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1823 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1824 _hr_printer.commit(curr, curr_end); |
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1825 curr = curr_end; |
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1826 } |
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1827 assert(curr == mr.end(), "post-condition"); |
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1828 } |
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1829 g1_policy()->record_new_heap_size(n_regions()); |
|
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1830 } else { |
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1831 ergo_verbose0(ErgoHeapSizing, |
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1832 "did not expand the heap", |
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1833 ergo_format_reason("heap expansion operation failed")); |
|
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1834 // The expansion of the virtual storage space was unsuccessful. |
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1835 // Let's see if it was because we ran out of swap. |
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1836 if (G1ExitOnExpansionFailure && |
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1837 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1838 // We had head room... |
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1839 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
| 342 | 1840 } |
| 1841 } | |
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1842 return successful; |
| 342 | 1843 } |
| 1844 | |
| 3766 | 1845 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1846 size_t aligned_shrink_bytes = |
| 1847 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1848 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1849 HeapRegion::GrainBytes); | |
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1850 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1851 |
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1852 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
| 3766 | 1853 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
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1854 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1855 |
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1856 ergo_verbose3(ErgoHeapSizing, |
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1857 "shrink the heap", |
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1858 ergo_format_byte("requested shrinking amount") |
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1859 ergo_format_byte("aligned shrinking amount") |
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1860 ergo_format_byte("attempted shrinking amount"), |
|
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1861 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1862 if (num_regions_removed > 0) { |
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1863 _g1_storage.shrink_by(shrunk_bytes); |
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1864 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1865 |
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1866 if (_hr_printer.is_active()) { |
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1867 HeapWord* curr = old_end; |
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1868 while (curr > new_end) { |
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1869 HeapWord* curr_end = curr; |
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1870 curr -= HeapRegion::GrainWords; |
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1871 _hr_printer.uncommit(curr, curr_end); |
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1872 } |
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1873 } |
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1874 |
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1875 _expansion_regions += num_regions_removed; |
| 3766 | 1876 update_committed_space(old_end, new_end); |
| 1877 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1878 g1_policy()->record_new_heap_size(n_regions()); |
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1879 } else { |
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1880 ergo_verbose0(ErgoHeapSizing, |
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1881 "did not shrink the heap", |
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1882 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1883 } |
| 1884 } | |
| 1885 | |
| 1886 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1887 verify_region_sets_optional(); |
| 1888 | |
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1889 // We should only reach here at the end of a Full GC which means we |
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1890 // should not not be holding to any GC alloc regions. The method |
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1891 // below will make sure of that and do any remaining clean up. |
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1892 abandon_gc_alloc_regions(); |
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1893 |
| 2152 | 1894 // Instead of tearing down / rebuilding the free lists here, we |
| 1895 // could instead use the remove_all_pending() method on free_list to | |
| 1896 // remove only the ones that we need to remove. | |
| 4072 | 1897 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1898 shrink_helper(shrink_bytes); |
| 4072 | 1899 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1900 |
| 3766 | 1901 _hrs.verify_optional(); |
| 2152 | 1902 verify_region_sets_optional(); |
| 342 | 1903 } |
| 1904 | |
| 1905 // Public methods. | |
| 1906 | |
| 1907 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1908 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1909 #endif // _MSC_VER | |
| 1910 | |
| 1911 | |
| 1912 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1913 SharedHeap(policy_), | |
| 1914 _g1_policy(policy_), | |
| 1111 | 1915 _dirty_card_queue_set(false), |
| 1705 | 1916 _into_cset_dirty_card_queue_set(false), |
|
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1917 _is_alive_closure_cm(this), |
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1918 _is_alive_closure_stw(this), |
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1919 _ref_processor_cm(NULL), |
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1920 _ref_processor_stw(NULL), |
| 342 | 1921 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1922 _bot_shared(NULL), | |
| 10405 | 1923 _evac_failure_scan_stack(NULL), |
| 342 | 1924 _mark_in_progress(false), |
| 2152 | 1925 _cg1r(NULL), _summary_bytes_used(0), |
|
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1926 _g1mm(NULL), |
| 342 | 1927 _refine_cte_cl(NULL), |
| 1928 _full_collection(false), | |
|
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1929 _free_list("Master Free List", new MasterFreeRegionListMtSafeChecker()), |
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1930 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1931 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1932 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
| 2152 | 1933 _free_regions_coming(false), |
| 342 | 1934 _young_list(new YoungList(this)), |
| 1935 _gc_time_stamp(0), | |
|
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1936 _retained_old_gc_alloc_region(NULL), |
| 6595 | 1937 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1938 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1939 _expand_heap_after_alloc_failure(true), |
| 526 | 1940 _surviving_young_words(NULL), |
|
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1941 _old_marking_cycles_started(0), |
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1942 _old_marking_cycles_completed(0), |
| 10405 | 1943 _concurrent_cycle_started(false), |
| 526 | 1944 _in_cset_fast_test(NULL), |
|
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1945 _in_cset_fast_test_base(NULL), |
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1946 _dirty_cards_region_list(NULL), |
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1947 _worker_cset_start_region(NULL), |
| 10405 | 1948 _worker_cset_start_region_time_stamp(NULL), |
| 1949 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
| 1950 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
| 1951 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
| 1952 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
| 1953 | |
| 1954 _g1h = this; | |
| 342 | 1955 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
| 1956 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1957 } | |
|
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1958 |
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1959 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1960 |
| 342 | 1961 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1962 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1963 | |
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1964 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
| 342 | 1965 assert(n_rem_sets > 0, "Invariant."); |
| 1966 | |
| 6197 | 1967 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1968 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
| 10405 | 1969 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
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1970 |
| 342 | 1971 for (int i = 0; i < n_queues; i++) { |
| 1972 RefToScanQueue* q = new RefToScanQueue(); | |
| 1973 q->initialize(); | |
| 1974 _task_queues->register_queue(i, q); | |
| 10405 | 1975 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
| 1976 } | |
|
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1977 clear_cset_start_regions(); |
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1978 |
|
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1979 // Initialize the G1EvacuationFailureALot counters and flags. |
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1980 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1981 |
| 342 | 1982 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1983 } | |
| 1984 | |
| 1985 jint G1CollectedHeap::initialize() { | |
| 1166 | 1986 CollectedHeap::pre_initialize(); |
| 342 | 1987 os::enable_vtime(); |
| 1988 | |
|
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1989 G1Log::init(); |
|
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1990 |
| 342 | 1991 // Necessary to satisfy locking discipline assertions. |
| 1992 | |
| 1993 MutexLocker x(Heap_lock); | |
| 1994 | |
|
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1995 // We have to initialize the printer before committing the heap, as |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
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|
1996 // it will be used then. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
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changeset
|
1997 _hr_printer.set_active(G1PrintHeapRegions); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
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3777
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|
1998 |
| 342 | 1999 // While there are no constraints in the GC code that HeapWordSize |
| 2000 // be any particular value, there are multiple other areas in the | |
| 2001 // system which believe this to be true (e.g. oop->object_size in some | |
| 2002 // cases incorrectly returns the size in wordSize units rather than | |
| 2003 // HeapWordSize). | |
| 2004 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 2005 | |
| 2006 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 2007 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
|
13060
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
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12840
diff
changeset
|
2008 size_t heap_alignment = collector_policy()->heap_alignment(); |
| 342 | 2009 |
| 2010 // Ensure that the sizes are properly aligned. | |
| 2011 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 2012 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
12082
diff
changeset
|
2013 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
| 342 | 2014 |
|
10246
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diff
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|
2015 _cg1r = new ConcurrentG1Refine(this); |
| 342 | 2016 |
| 2017 // Reserve the maximum. | |
|
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
620
diff
changeset
|
2018 |
|
3824
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2019 // When compressed oops are enabled, the preferred heap base |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2020 // is calculated by subtracting the requested size from the |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2021 // 32Gb boundary and using the result as the base address for |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2022 // heap reservation. If the requested size is not aligned to |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2023 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2024 // into the ReservedHeapSpace constructor) then the actual |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2025 // base of the reserved heap may end up differing from the |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2026 // address that was requested (i.e. the preferred heap base). |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2027 // 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
|
2028 // compressed oops mode. |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2029 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2030 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
12082
diff
changeset
|
2031 heap_alignment); |
| 342 | 2032 |
| 2033 // It is important to do this in a way such that concurrent readers can't | |
| 10405 | 2034 // temporarily think something is in the heap. (I've actually seen this |
| 342 | 2035 // happen in asserts: DLD.) |
| 2036 _reserved.set_word_size(0); | |
| 2037 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 2038 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 2039 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2040 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
| 342 | 2041 |
| 2042 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 2043 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 2044 set_barrier_set(rem_set()->bs()); | |
| 12343 | 2045 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
| 2046 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
| 342 | 2047 return JNI_ENOMEM; |
| 2048 } | |
| 2049 | |
| 2050 // Also create a G1 rem set. | |
| 12343 | 2051 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
| 342 | 2052 |
| 2053 // Carve out the G1 part of the heap. | |
| 2054 | |
| 2055 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
| 2056 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
| 2057 g1_rs.size()/HeapWordSize); | |
| 2058 | |
| 2059 _g1_storage.initialize(g1_rs, 0); | |
| 2060 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
| 3766 | 2061 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
|
12305
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents:
12233
diff
changeset
|
2062 (HeapWord*) _g1_reserved.end()); |
|
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
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12233
diff
changeset
|
2063 assert(_hrs.max_length() == _expansion_regions, |
|
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents:
12233
diff
changeset
|
2064 err_msg("max length: %u expansion regions: %u", |
|
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents:
12233
diff
changeset
|
2065 _hrs.max_length(), _expansion_regions)); |
| 342 | 2066 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2067 // 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
|
2068 _cg1r->init(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2069 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2070 // 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
|
2071 // in the remembered set structures. |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2072 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
|
2073 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
|
2074 |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2075 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
|
2076 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
|
2077 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2078 "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
|
2079 |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
2080 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
| 2152 | 2081 |
| 342 | 2082 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
| 2083 heap_word_size(init_byte_size)); | |
| 2084 | |
| 2085 _g1h = this; | |
| 2086 | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2087 _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
|
2088 _in_cset_fast_test_base = |
| 6197 | 2089 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
|
2090 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2091 // 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
|
2092 // 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
|
2093 // 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
|
2094 _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
|
2095 ((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
|
2096 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2097 // 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
|
2098 // 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
|
2099 // evacuation pause. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2100 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
|
2101 |
| 342 | 2102 // Create the ConcurrentMark data structure and thread. |
| 2103 // (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
|
2104 _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
|
2105 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
|
2106 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
|
2107 return JNI_ENOMEM; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2108 } |
| 342 | 2109 _cmThread = _cm->cmThread(); |
| 2110 | |
| 2111 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2112 HeapRegionRemSet::init_heap(max_regions()); | |
| 2113 | |
| 677 | 2114 // Now expand into the initial heap size. |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2115 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
|
2116 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
|
2117 return JNI_ENOMEM; |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2118 } |
| 342 | 2119 |
| 2120 // Perform any initialization actions delegated to the policy. | |
| 2121 g1_policy()->init(); | |
| 2122 | |
| 2123 _refine_cte_cl = | |
| 2124 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
| 2125 g1_rem_set(), | |
| 2126 concurrent_g1_refine()); | |
| 2127 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 2128 | |
| 2129 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2130 SATB_Q_FL_lock, | |
| 1111 | 2131 G1SATBProcessCompletedThreshold, |
| 342 | 2132 Shared_SATB_Q_lock); |
| 794 | 2133 |
| 2134 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
| 2135 DirtyCardQ_FL_lock, | |
| 1111 | 2136 concurrent_g1_refine()->yellow_zone(), |
| 2137 concurrent_g1_refine()->red_zone(), | |
| 794 | 2138 Shared_DirtyCardQ_lock); |
| 2139 | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2140 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2141 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2142 DirtyCardQ_FL_lock, |
| 1111 | 2143 -1, // never trigger processing |
| 2144 -1, // no limit on length | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2145 Shared_DirtyCardQ_lock, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2146 &JavaThread::dirty_card_queue_set()); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2147 } |
| 1705 | 2148 |
| 2149 // Initialize the card queue set used to hold cards containing | |
| 2150 // references into the collection set. | |
| 2151 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
| 2152 DirtyCardQ_FL_lock, | |
| 2153 -1, // never trigger processing | |
| 2154 -1, // no limit on length | |
| 2155 Shared_DirtyCardQ_lock, | |
| 2156 &JavaThread::dirty_card_queue_set()); | |
| 2157 | |
| 342 | 2158 // In case we're keeping closure specialization stats, initialize those |
| 2159 // counts and that mechanism. | |
| 2160 SpecializationStats::clear(); | |
| 2161 | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2162 // 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
|
2163 // 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
|
2164 // space here, lots of asserts fire. |
| 3766 | 2165 |
| 2166 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
| 2167 _g1_reserved.start()); | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2168 // 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
|
2169 // 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
|
2170 // 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
|
2171 // 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
|
2172 dummy_region->set_young(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2173 // Make sure it's full. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2174 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2175 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2176 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2177 init_mutator_alloc_region(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2178 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2179 // 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
|
2180 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2181 _g1mm = new G1MonitoringSupport(this); |
|
3289
b52782ae3880
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|
2182 |
| 17764 | 2183 G1StringDedup::initialize(); |
| 2184 | |
| 342 | 2185 return JNI_OK; |
| 2186 } | |
| 2187 | |
|
17947
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|
2188 void G1CollectedHeap::stop() { |
|
1772223a25a2
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|
2189 // Abort any ongoing concurrent root region scanning and stop all |
|
1772223a25a2
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|
2190 // concurrent threads. We do this to make sure these threads do |
|
1772223a25a2
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|
2191 // not continue to execute and access resources (e.g. gclog_or_tty) |
|
1772223a25a2
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|
2192 // that are destroyed during shutdown. |
|
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|
2193 _cm->root_regions()->abort(); |
|
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|
2194 _cm->root_regions()->wait_until_scan_finished(); |
|
1772223a25a2
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|
2195 stop_conc_gc_threads(); |
|
1772223a25a2
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|
2196 } |
|
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|
2197 |
|
12233
40136aa2cdb1
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|
2198 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
|
40136aa2cdb1
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|
2199 return HeapRegion::max_region_size(); |
|
40136aa2cdb1
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|
2200 } |
|
40136aa2cdb1
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|
2201 |
| 342 | 2202 void G1CollectedHeap::ref_processing_init() { |
|
1974
fd1d227ef1b9
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|
2203 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
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|
2204 // |
|
3979
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|
2205 // * There are two reference processor instances. One is |
|
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|
2206 // used to record and process discovered references |
|
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|
2207 // during concurrent marking; the other is used to |
|
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|
2208 // record and process references during STW pauses |
|
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|
2209 // (both full and incremental). |
|
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|
2210 // * Both ref processors need to 'span' the entire heap as |
|
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|
2211 // the regions in the collection set may be dotted around. |
|
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|
2212 // |
|
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|
2213 // * For the concurrent marking ref processor: |
|
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|
2214 // * Reference discovery is enabled at initial marking. |
|
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|
2215 // * Reference discovery is disabled and the discovered |
|
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|
2216 // references processed etc during remarking. |
|
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|
2217 // * Reference discovery is MT (see below). |
|
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|
2218 // * Reference discovery requires a barrier (see below). |
|
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|
2219 // * Reference processing may or may not be MT |
|
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|
2220 // (depending on the value of ParallelRefProcEnabled |
|
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|
2221 // and ParallelGCThreads). |
|
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|
2222 // * A full GC disables reference discovery by the CM |
|
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|
2223 // ref processor and abandons any entries on it's |
|
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|
2224 // discovered lists. |
|
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|
2225 // |
|
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|
2226 // * For the STW processor: |
|
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|
2227 // * Non MT discovery is enabled at the start of a full GC. |
|
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|
2228 // * Processing and enqueueing during a full GC is non-MT. |
|
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|
2229 // * During a full GC, references are processed after marking. |
|
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|
2230 // |
|
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|
2231 // * Discovery (may or may not be MT) is enabled at the start |
|
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|
2232 // of an incremental evacuation pause. |
|
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|
2233 // * References are processed near the end of a STW evacuation pause. |
|
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|
2234 // * For both types of GC: |
|
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|
2235 // * Discovery is atomic - i.e. not concurrent. |
|
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|
2236 // * Reference discovery will not need a barrier. |
|
1974
fd1d227ef1b9
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|
2237 |
| 342 | 2238 SharedHeap::ref_processing_init(); |
| 2239 MemRegion mr = reserved_region(); | |
|
3979
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|
2240 |
|
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|
2241 // Concurrent Mark ref processor |
|
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|
2242 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
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diff
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|
2243 new ReferenceProcessor(mr, // span |
|
3979
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|
2244 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
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|
2245 // mt processing |
|
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|
2246 (int) ParallelGCThreads, |
|
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|
2247 // degree of mt processing |
|
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|
2248 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
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|
2249 // mt discovery |
|
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|
2250 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
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|
2251 // degree of mt discovery |
|
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|
2252 false, |
|
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|
2253 // Reference discovery is not atomic |
|
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|
2254 &_is_alive_closure_cm, |
|
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|
2255 // is alive closure |
|
4dfb2df418f2
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|
2256 // (for efficiency/performance) |
|
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|
2257 true); |
|
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|
2258 // Setting next fields of discovered |
|
4dfb2df418f2
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changeset
|
2259 // lists requires a barrier. |
|
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|
2260 |
|
4dfb2df418f2
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|
2261 // STW ref processor |
|
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|
2262 _ref_processor_stw = |
|
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|
2263 new ReferenceProcessor(mr, // span |
|
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|
2264 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
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|
2265 // mt processing |
|
4dfb2df418f2
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|
2266 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
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|
2267 // degree of mt processing |
|
4dfb2df418f2
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|
2268 (ParallelGCThreads > 1), |
|
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|
2269 // mt discovery |
|
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|
2270 MAX2((int)ParallelGCThreads, 1), |
|
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|
2271 // degree of mt discovery |
|
4dfb2df418f2
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diff
changeset
|
2272 true, |
|
4dfb2df418f2
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|
2273 // Reference discovery is atomic |
|
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|
2274 &_is_alive_closure_stw, |
|
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|
2275 // is alive closure |
|
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|
2276 // (for efficiency/performance) |
|
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|
2277 false); |
|
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|
2278 // Setting next fields of discovered |
|
17748
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|
2279 // lists does not require a barrier. |
| 342 | 2280 } |
| 2281 | |
| 2282 size_t G1CollectedHeap::capacity() const { | |
| 2283 return _g1_committed.byte_size(); | |
| 2284 } | |
| 2285 | |
|
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|
2286 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
|
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|
2287 assert(!hr->continuesHumongous(), "pre-condition"); |
|
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|
2288 hr->reset_gc_time_stamp(); |
|
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|
2289 if (hr->startsHumongous()) { |
|
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|
2290 uint first_index = hr->hrs_index() + 1; |
|
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|
2291 uint last_index = hr->last_hc_index(); |
|
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|
2292 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2293 HeapRegion* chr = region_at(i); |
|
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|
2294 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2295 chr->reset_gc_time_stamp(); |
|
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|
2296 } |
|
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|
2297 } |
|
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|
2298 } |
|
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|
2299 |
|
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|
2300 #ifndef PRODUCT |
|
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|
2301 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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2302 private: |
|
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|
2303 unsigned _gc_time_stamp; |
|
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|
2304 bool _failures; |
|
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|
2305 |
|
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|
2306 public: |
|
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|
2307 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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|
2308 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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2309 |
|
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|
2310 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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|
2311 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
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2312 if (_gc_time_stamp != region_gc_time_stamp) { |
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2313 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
|
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2314 "expected %d", HR_FORMAT_PARAMS(hr), |
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|
2315 region_gc_time_stamp, _gc_time_stamp); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2316 _failures = true; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2317 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2318 return false; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2319 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2320 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2321 bool failures() { return _failures; } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2322 }; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2323 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2324 void G1CollectedHeap::check_gc_time_stamps() { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2325 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2326 heap_region_iterate(&cl); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2327 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2328 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2329 #endif // PRODUCT |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2330 |
| 1705 | 2331 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2332 DirtyCardQueue* into_cset_dcq, | |
| 2333 bool concurrent, | |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2334 uint worker_i) { |
| 889 | 2335 // Clean cards in the hot card cache |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2336 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
|
2337 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2338 |
| 342 | 2339 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2340 int n_completed_buffers = 0; | |
| 1705 | 2341 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2342 n_completed_buffers++; |
| 2343 } | |
|
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
|
2344 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
| 342 | 2345 dcqs.clear_n_completed_buffers(); |
| 2346 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2347 } | |
| 2348 | |
| 2349 | |
| 2350 // Computes the sum of the storage used by the various regions. | |
| 2351 | |
| 2352 size_t G1CollectedHeap::used() const { | |
|
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2353 assert(Heap_lock->owner() != NULL, |
|
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2354 "Should be owned on this thread's behalf."); |
| 342 | 2355 size_t result = _summary_bytes_used; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2356 // Read only once in case it is set to NULL concurrently |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2357 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2358 if (hr != NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2359 result += hr->used(); |
| 342 | 2360 return result; |
| 2361 } | |
| 2362 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2363 size_t G1CollectedHeap::used_unlocked() const { |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2364 size_t result = _summary_bytes_used; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2365 return result; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2366 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2367 |
| 342 | 2368 class SumUsedClosure: public HeapRegionClosure { |
| 2369 size_t _used; | |
| 2370 public: | |
| 2371 SumUsedClosure() : _used(0) {} | |
| 2372 bool doHeapRegion(HeapRegion* r) { | |
| 2373 if (!r->continuesHumongous()) { | |
| 2374 _used += r->used(); | |
| 2375 } | |
| 2376 return false; | |
| 2377 } | |
| 2378 size_t result() { return _used; } | |
| 2379 }; | |
| 2380 | |
| 2381 size_t G1CollectedHeap::recalculate_used() const { | |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2382 double recalculate_used_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2383 |
| 342 | 2384 SumUsedClosure blk; |
| 3766 | 2385 heap_region_iterate(&blk); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2386 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2387 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
| 342 | 2388 return blk.result(); |
| 2389 } | |
| 2390 | |
| 2391 size_t G1CollectedHeap::unsafe_max_alloc() { | |
| 2152 | 2392 if (free_regions() > 0) return HeapRegion::GrainBytes; |
| 342 | 2393 // otherwise, is there space in the current allocation region? |
| 2394 | |
| 2395 // We need to store the current allocation region in a local variable | |
| 2396 // here. The problem is that this method doesn't take any locks and | |
| 2397 // there may be other threads which overwrite the current allocation | |
| 2398 // region field. attempt_allocation(), for example, sets it to NULL | |
| 2399 // and this can happen *after* the NULL check here but before the call | |
| 2400 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
| 2401 // to be a problem in the optimized build, since the two loads of the | |
| 2402 // current allocation region field are optimized away. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2403 HeapRegion* hr = _mutator_alloc_region.get(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2404 if (hr == NULL) { |
| 342 | 2405 return 0; |
| 2406 } | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2407 return hr->free(); |
| 342 | 2408 } |
| 2409 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2410 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
|
2411 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2412 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
|
2413 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
|
2414 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
|
2415 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2416 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2417 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2418 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2419 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2420 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2421 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2422 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2423 // 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
|
2424 guarantee(isHumongous(word_size), "sanity"); |
|
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 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2427 // 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
|
2428 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2429 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2430 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2431 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2432 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2433 // 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
|
2434 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2435 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2436 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2437 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2438 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2439 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2440 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2441 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
|
2442 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
|
2443 _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
|
2444 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
|
2445 _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
|
2446 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2447 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2448 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2449 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2450 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
|
2451 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2452 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2453 // 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
|
2454 // 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
|
2455 // 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
|
2456 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2457 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2458 // 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
|
2459 // 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
|
2460 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2461 // 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
|
2462 // 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
|
2463 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2464 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2465 // 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
|
2466 assert(concurrent || |
|
6120
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 + 1) || |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2468 (_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
|
2469 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
|
2470 "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
|
2471 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2472 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2473 // 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
|
2474 assert(!concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2475 (_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
|
2476 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
|
2477 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2478 "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
|
2479 _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
|
2480 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2481 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2482 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2483 // 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
|
2484 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2485 // is set) so that if a waiter requests another System.gc() it doesn't |
| 10405 | 2486 // 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
|
2487 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2488 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2489 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2490 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2491 // 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
|
2492 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
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|
2493 // 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
|
2494 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2495 FullGCCount_lock->notify_all(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2496 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2497 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2498 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
| 10405 | 2499 _concurrent_cycle_started = true; |
| 2500 _gc_timer_cm->register_gc_start(start_time); | |
| 2501 | |
| 2502 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
| 2503 trace_heap_before_gc(_gc_tracer_cm); | |
| 2504 } | |
| 2505 | |
| 2506 void G1CollectedHeap::register_concurrent_cycle_end() { | |
| 2507 if (_concurrent_cycle_started) { | |
| 2508 if (_cm->has_aborted()) { | |
| 2509 _gc_tracer_cm->report_concurrent_mode_failure(); | |
| 2510 } | |
|
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2511 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2512 _gc_timer_cm->register_gc_end(); |
| 10405 | 2513 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
| 2514 | |
| 2515 _concurrent_cycle_started = false; | |
| 2516 } | |
| 2517 } | |
| 2518 | |
| 2519 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
| 2520 if (_concurrent_cycle_started) { | |
| 2521 trace_heap_after_gc(_gc_tracer_cm); | |
| 2522 } | |
| 2523 } | |
| 2524 | |
| 2525 G1YCType G1CollectedHeap::yc_type() { | |
| 2526 bool is_young = g1_policy()->gcs_are_young(); | |
| 2527 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
| 2528 bool is_during_mark = mark_in_progress(); | |
| 2529 | |
| 2530 if (is_initial_mark) { | |
| 2531 return InitialMark; | |
| 2532 } else if (is_during_mark) { | |
| 2533 return DuringMark; | |
| 2534 } else if (is_young) { | |
| 2535 return Normal; | |
| 2536 } else { | |
| 2537 return Mixed; | |
| 2538 } | |
| 2539 } | |
| 2540 | |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2541 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
|
2542 assert_heap_not_locked(); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2543 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2544 unsigned int gc_count_before; |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2545 unsigned int old_marking_count_before; |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
2546 bool retry_gc; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
2547 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
2548 do { |
|
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
|
2549 retry_gc = false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2550 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2551 { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
2552 MutexLocker ml(Heap_lock); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2553 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2554 // Read the GC count while holding the Heap_lock |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2555 gc_count_before = total_collections(); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2556 old_marking_count_before = _old_marking_cycles_started; |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2557 } |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2558 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2559 if (should_do_concurrent_full_gc(cause)) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2560 // Schedule an initial-mark evacuation pause that will start a |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2561 // concurrent cycle. We're setting word_size to 0 which means that |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2562 // we are not requesting a post-GC allocation. |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2563 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2564 0, /* word_size */ |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2565 true, /* should_initiate_conc_mark */ |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2566 g1_policy()->max_pause_time_ms(), |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2567 cause); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2568 |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2569 VMThread::execute(&op); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2570 if (!op.pause_succeeded()) { |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2571 if (old_marking_count_before == _old_marking_cycles_started) { |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2572 retry_gc = op.should_retry_gc(); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2573 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2574 // A Full GC happened while we were trying to schedule the |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2575 // initial-mark GC. No point in starting a new cycle given |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2576 // that the whole heap was collected anyway. |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2577 } |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2578 |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2579 if (retry_gc) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2580 if (GC_locker::is_active_and_needs_gc()) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2581 GC_locker::stall_until_clear(); |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2582 } |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2583 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2584 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2585 } else { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2586 if (cause == GCCause::_gc_locker |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2587 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2588 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2589 // Schedule a standard evacuation pause. We're setting word_size |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2590 // to 0 which means that we are not requesting a post-GC allocation. |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2591 VM_G1IncCollectionPause op(gc_count_before, |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2592 0, /* word_size */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2593 false, /* should_initiate_conc_mark */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2594 g1_policy()->max_pause_time_ms(), |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2595 cause); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2596 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2597 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2598 // Schedule a Full GC. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2599 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2600 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2601 } |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2602 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2603 } while (retry_gc); |
| 342 | 2604 } |
| 2605 | |
| 2606 bool G1CollectedHeap::is_in(const void* p) const { | |
| 4708 | 2607 if (_g1_committed.contains(p)) { |
| 2608 // Given that we know that p is in the committed space, | |
| 2609 // heap_region_containing_raw() should successfully | |
| 2610 // return the containing region. | |
| 2611 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2612 return hr->is_in(p); |
| 2613 } else { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2614 return false; |
| 342 | 2615 } |
| 2616 } | |
| 2617 | |
| 2618 // Iteration functions. | |
| 2619 | |
| 2620 // Iterates an OopClosure over all ref-containing fields of objects | |
| 2621 // within a HeapRegion. | |
| 2622 | |
| 2623 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
| 2624 MemRegion _mr; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
2625 ExtendedOopClosure* _cl; |
| 342 | 2626 public: |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2627 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
| 342 | 2628 : _mr(mr), _cl(cl) {} |
| 2629 bool doHeapRegion(HeapRegion* r) { | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2630 if (!r->continuesHumongous()) { |
| 342 | 2631 r->oop_iterate(_cl); |
| 2632 } | |
| 2633 return false; | |
| 2634 } | |
| 2635 }; | |
| 2636 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2637 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
| 342 | 2638 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
| 3766 | 2639 heap_region_iterate(&blk); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2640 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2641 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2642 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
| 342 | 2643 IterateOopClosureRegionClosure blk(mr, cl); |
| 3766 | 2644 heap_region_iterate(&blk); |
| 342 | 2645 } |
| 2646 | |
| 2647 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2648 | |
| 2649 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2650 ObjectClosure* _cl; | |
| 2651 public: | |
| 2652 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2653 bool doHeapRegion(HeapRegion* r) { | |
| 2654 if (! r->continuesHumongous()) { | |
| 2655 r->object_iterate(_cl); | |
| 2656 } | |
| 2657 return false; | |
| 2658 } | |
| 2659 }; | |
| 2660 | |
|
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|
2661 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
| 342 | 2662 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2663 heap_region_iterate(&blk); |
| 342 | 2664 } |
| 2665 | |
| 2666 // Calls a SpaceClosure on a HeapRegion. | |
| 2667 | |
| 2668 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2669 SpaceClosure* _cl; | |
| 2670 public: | |
| 2671 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2672 bool doHeapRegion(HeapRegion* r) { | |
| 2673 _cl->do_space(r); | |
| 2674 return false; | |
| 2675 } | |
| 2676 }; | |
| 2677 | |
| 2678 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2679 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2680 heap_region_iterate(&blk); |
| 342 | 2681 } |
| 2682 | |
| 3766 | 2683 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
| 2684 _hrs.iterate(cl); | |
| 342 | 2685 } |
| 2686 | |
| 2687 void | |
| 2688 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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|
2689 uint worker_id, |
|
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|
2690 uint no_of_par_workers, |
| 342 | 2691 jint claim_value) { |
|
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|
2692 const uint regions = n_regions(); |
|
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|
2693 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
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|
2694 no_of_par_workers : |
|
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|
2695 1); |
|
bca17e38de00
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|
2696 assert(UseDynamicNumberOfGCThreads || |
|
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|
2697 no_of_par_workers == workers()->total_workers(), |
|
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|
2698 "Non dynamic should use fixed number of workers"); |
| 355 | 2699 // try to spread out the starting points of the workers |
|
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|
2700 const HeapRegion* start_hr = |
|
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|
2701 start_region_for_worker(worker_id, no_of_par_workers); |
|
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2702 const uint start_index = start_hr->hrs_index(); |
| 355 | 2703 |
| 2704 // each worker will actually look at all regions | |
|
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|
2705 for (uint count = 0; count < regions; ++count) { |
|
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|
2706 const uint index = (start_index + count) % regions; |
| 355 | 2707 assert(0 <= index && index < regions, "sanity"); |
| 2708 HeapRegion* r = region_at(index); | |
| 2709 // we'll ignore "continues humongous" regions (we'll process them | |
| 2710 // when we come across their corresponding "start humongous" | |
| 2711 // region) and regions already claimed | |
| 2712 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
| 2713 continue; | |
| 2714 } | |
| 2715 // OK, try to claim it | |
| 342 | 2716 if (r->claimHeapRegion(claim_value)) { |
| 355 | 2717 // success! |
| 2718 assert(!r->continuesHumongous(), "sanity"); | |
| 2719 if (r->startsHumongous()) { | |
| 2720 // If the region is "starts humongous" we'll iterate over its | |
| 2721 // "continues humongous" first; in fact we'll do them | |
| 2722 // first. The order is important. In on case, calling the | |
| 2723 // closure on the "starts humongous" region might de-allocate | |
| 2724 // and clear all its "continues humongous" regions and, as a | |
| 2725 // result, we might end up processing them twice. So, we'll do | |
| 2726 // them first (notice: most closures will ignore them anyway) and | |
| 2727 // then we'll do the "starts humongous" region. | |
|
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|
2728 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
| 355 | 2729 HeapRegion* chr = region_at(ch_index); |
| 2730 | |
| 2731 // if the region has already been claimed or it's not | |
| 2732 // "continues humongous" we're done | |
| 2733 if (chr->claim_value() == claim_value || | |
| 2734 !chr->continuesHumongous()) { | |
| 2735 break; | |
| 2736 } | |
| 2737 | |
| 10405 | 2738 // No one should have claimed it directly. We can given |
| 355 | 2739 // that we claimed its "starts humongous" region. |
| 2740 assert(chr->claim_value() != claim_value, "sanity"); | |
| 2741 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2742 | |
| 2743 if (chr->claimHeapRegion(claim_value)) { | |
| 10405 | 2744 // we should always be able to claim it; no one else should |
| 355 | 2745 // be trying to claim this region |
| 2746 | |
| 2747 bool res2 = cl->doHeapRegion(chr); | |
| 2748 assert(!res2, "Should not abort"); | |
| 2749 | |
| 2750 // Right now, this holds (i.e., no closure that actually | |
| 2751 // does something with "continues humongous" regions | |
| 2752 // clears them). We might have to weaken it in the future, | |
| 2753 // but let's leave these two asserts here for extra safety. | |
| 2754 assert(chr->continuesHumongous(), "should still be the case"); | |
| 2755 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2756 } else { | |
| 2757 guarantee(false, "we should not reach here"); | |
| 2758 } | |
| 2759 } | |
| 2760 } | |
| 2761 | |
| 2762 assert(!r->continuesHumongous(), "sanity"); | |
| 2763 bool res = cl->doHeapRegion(r); | |
| 2764 assert(!res, "Should not abort"); | |
| 2765 } | |
| 2766 } | |
| 2767 } | |
| 2768 | |
| 390 | 2769 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2770 public: | |
| 2771 bool doHeapRegion(HeapRegion* r) { | |
| 2772 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2773 return false; | |
| 2774 } | |
| 2775 }; | |
| 2776 | |
|
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|
2777 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2778 ResetClaimValuesClosure blk; |
| 2779 heap_region_iterate(&blk); | |
| 2780 } | |
| 2781 | |
|
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|
2782 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
023652e49ac0
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|
2783 ResetClaimValuesClosure blk; |
|
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|
2784 collection_set_iterate(&blk); |
|
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|
2785 } |
|
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|
2786 |
| 355 | 2787 #ifdef ASSERT |
| 2788 // This checks whether all regions in the heap have the correct claim | |
| 2789 // value. I also piggy-backed on this a check to ensure that the | |
| 2790 // humongous_start_region() information on "continues humongous" | |
| 2791 // regions is correct. | |
| 2792 | |
| 2793 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2794 private: | |
| 2795 jint _claim_value; | |
|
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|
2796 uint _failures; |
| 355 | 2797 HeapRegion* _sh_region; |
|
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|
2798 |
| 355 | 2799 public: |
| 2800 CheckClaimValuesClosure(jint claim_value) : | |
| 2801 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2802 bool doHeapRegion(HeapRegion* r) { | |
| 2803 if (r->claim_value() != _claim_value) { | |
|
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|
2804 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2805 "claim value = %d, should be %d", |
|
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|
2806 HR_FORMAT_PARAMS(r), |
|
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|
2807 r->claim_value(), _claim_value); |
| 355 | 2808 ++_failures; |
| 2809 } | |
| 2810 if (!r->isHumongous()) { | |
| 2811 _sh_region = NULL; | |
| 2812 } else if (r->startsHumongous()) { | |
| 2813 _sh_region = r; | |
| 2814 } else if (r->continuesHumongous()) { | |
| 2815 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2816 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2817 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2818 HR_FORMAT_PARAMS(r), |
| 355 | 2819 r->humongous_start_region(), |
| 2820 _sh_region); | |
| 2821 ++_failures; | |
| 342 | 2822 } |
| 2823 } | |
| 355 | 2824 return false; |
| 2825 } | |
|
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|
2826 uint failures() { return _failures; } |
| 355 | 2827 }; |
| 2828 | |
| 2829 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2830 CheckClaimValuesClosure cl(claim_value); | |
| 2831 heap_region_iterate(&cl); | |
| 2832 return cl.failures() == 0; | |
| 2833 } | |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2834 |
|
dc467e8b2c5e
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|
2835 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
6010
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|
2836 private: |
|
720b6a76dd9d
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|
2837 jint _claim_value; |
|
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|
2838 uint _failures; |
|
4097
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|
2839 |
|
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|
2840 public: |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2841 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
6010
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|
2842 _claim_value(claim_value), _failures(0) { } |
|
720b6a76dd9d
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|
2843 |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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|
2844 uint failures() { return _failures; } |
|
4097
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|
2845 |
|
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|
2846 bool doHeapRegion(HeapRegion* hr) { |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2847 assert(hr->in_collection_set(), "how?"); |
|
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|
2848 assert(!hr->isHumongous(), "H-region in CSet"); |
|
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|
2849 if (hr->claim_value() != _claim_value) { |
|
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|
2850 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
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|
2851 "claim value = %d, should be %d", |
|
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|
2852 HR_FORMAT_PARAMS(hr), |
|
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|
2853 hr->claim_value(), _claim_value); |
|
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|
2854 _failures += 1; |
|
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|
2855 } |
|
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|
2856 return false; |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2857 } |
|
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|
2858 }; |
|
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|
2859 |
|
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|
2860 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
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|
2861 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2862 collection_set_iterate(&cl); |
|
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|
2863 return cl.failures() == 0; |
|
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|
2864 } |
| 355 | 2865 #endif // ASSERT |
| 342 | 2866 |
|
4709
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|
2867 // Clear the cached CSet starting regions and (more importantly) |
|
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|
2868 // the time stamps. Called when we reset the GC time stamp. |
|
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|
2869 void G1CollectedHeap::clear_cset_start_regions() { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2870 assert(_worker_cset_start_region != NULL, "sanity"); |
|
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|
2871 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
fd2b426c30db
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|
2872 |
|
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|
2873 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
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|
2874 for (int i = 0; i < n_queues; i++) { |
|
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|
2875 _worker_cset_start_region[i] = NULL; |
|
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|
2876 _worker_cset_start_region_time_stamp[i] = 0; |
|
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|
2877 } |
|
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|
2878 } |
|
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|
2879 |
|
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|
2880 // Given the id of a worker, obtain or calculate a suitable |
|
fd2b426c30db
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changeset
|
2881 // starting region for iterating over the current collection set. |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2882 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(uint worker_i) { |
|
4709
fd2b426c30db
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changeset
|
2883 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
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|
2884 |
|
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|
2885 HeapRegion* result = NULL; |
|
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diff
changeset
|
2886 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
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4708
diff
changeset
|
2887 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2888 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2889 // Cached starting region for current worker was set |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2890 // during the current pause - so it's valid. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2891 // Note: the cached starting heap region may be NULL |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2892 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2893 result = _worker_cset_start_region[worker_i]; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2894 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
|
2895 return result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2896 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2897 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2898 // The cached entry was not valid so let's calculate |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2899 // a suitable starting heap region for this worker. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2900 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2901 // We want the parallel threads to start their collection |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2902 // set iteration at different collection set regions to |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2903 // avoid contention. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2904 // If we have: |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2905 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2906 // p threads |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2907 // Then thread t will start at region floor ((t * n) / p) |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2908 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2909 result = g1_policy()->collection_set(); |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2910 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2911 uint cs_size = g1_policy()->cset_region_length(); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2912 uint active_workers = workers()->active_workers(); |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2913 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2914 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2915 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2916 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2917 uint end_ind = (cs_size * worker_i) / active_workers; |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2918 uint start_ind = 0; |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2919 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2920 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2921 _worker_cset_start_region_time_stamp[worker_i - 1] == gc_time_stamp) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2922 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2923 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2924 start_ind = (cs_size * (worker_i - 1)) / active_workers; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2925 result = _worker_cset_start_region[worker_i - 1]; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2926 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2927 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2928 for (uint i = start_ind; i < end_ind; i++) { |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2929 result = result->next_in_collection_set(); |
|
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 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2932 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2933 // 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
|
2934 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2935 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
|
2936 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
|
2937 "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
|
2938 _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
|
2939 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2940 _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
|
2941 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2942 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2943 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2944 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2945 uint no_of_par_workers) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2946 uint worker_num = |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2947 G1CollectedHeap::use_parallel_gc_threads() ? no_of_par_workers : 1U; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2948 assert(UseDynamicNumberOfGCThreads || |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2949 no_of_par_workers == workers()->total_workers(), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2950 "Non dynamic should use fixed number of workers"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2951 const uint start_index = n_regions() * worker_i / worker_num; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2952 return region_at(start_index); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2953 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2954 |
| 342 | 2955 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2956 HeapRegion* r = g1_policy()->collection_set(); | |
| 2957 while (r != NULL) { | |
| 2958 HeapRegion* next = r->next_in_collection_set(); | |
| 2959 if (cl->doHeapRegion(r)) { | |
| 2960 cl->incomplete(); | |
| 2961 return; | |
| 2962 } | |
| 2963 r = next; | |
| 2964 } | |
| 2965 } | |
| 2966 | |
| 2967 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2968 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2969 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2970 // 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
|
2971 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2972 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2973 |
| 342 | 2974 assert(r->in_collection_set(), |
| 2975 "Start region must be a member of the collection set."); | |
| 2976 HeapRegion* cur = r; | |
| 2977 while (cur != NULL) { | |
| 2978 HeapRegion* next = cur->next_in_collection_set(); | |
| 2979 if (cl->doHeapRegion(cur) && false) { | |
| 2980 cl->incomplete(); | |
| 2981 return; | |
| 2982 } | |
| 2983 cur = next; | |
| 2984 } | |
| 2985 cur = g1_policy()->collection_set(); | |
| 2986 while (cur != r) { | |
| 2987 HeapRegion* next = cur->next_in_collection_set(); | |
| 2988 if (cl->doHeapRegion(cur) && false) { | |
| 2989 cl->incomplete(); | |
| 2990 return; | |
| 2991 } | |
| 2992 cur = next; | |
| 2993 } | |
| 2994 } | |
| 2995 | |
| 2996 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
| 3766 | 2997 return n_regions() > 0 ? region_at(0) : NULL; |
| 342 | 2998 } |
| 2999 | |
| 3000 | |
| 3001 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
| 3002 Space* res = heap_region_containing(addr); | |
| 3003 return res; | |
| 3004 } | |
| 3005 | |
| 3006 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 3007 Space* sp = space_containing(addr); | |
| 3008 if (sp != NULL) { | |
| 3009 return sp->block_start(addr); | |
| 3010 } | |
| 3011 return NULL; | |
| 3012 } | |
| 3013 | |
| 3014 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 3015 Space* sp = space_containing(addr); | |
| 3016 assert(sp != NULL, "block_size of address outside of heap"); | |
| 3017 return sp->block_size(addr); | |
| 3018 } | |
| 3019 | |
| 3020 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 3021 Space* sp = space_containing(addr); | |
| 3022 return sp->block_is_obj(addr); | |
| 3023 } | |
| 3024 | |
| 3025 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 3026 return true; | |
| 3027 } | |
| 3028 | |
| 3029 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 17727 | 3030 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
| 3031 } | |
| 3032 | |
| 3033 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
| 3034 return young_list()->eden_used_bytes(); | |
| 3035 } | |
| 3036 | |
| 3037 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
| 3038 // must be smaller than the humongous object limit. | |
| 3039 size_t G1CollectedHeap::max_tlab_size() const { | |
| 3040 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
| 342 | 3041 } |
| 3042 | |
| 3043 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 3044 // Return the remaining space in the cur alloc region, but not less than | |
| 3045 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3046 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3047 // Also, this value can be at most the humongous object threshold, |
| 10405 | 3048 // 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
|
3049 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3050 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3051 HeapRegion* hr = _mutator_alloc_region.get(); |
| 17727 | 3052 size_t max_tlab = max_tlab_size() * wordSize; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3053 if (hr == NULL) { |
| 17727 | 3054 return max_tlab; |
| 342 | 3055 } else { |
| 17727 | 3056 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
| 342 | 3057 } |
| 3058 } | |
| 3059 | |
| 3060 size_t G1CollectedHeap::max_capacity() const { | |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
3061 return _g1_reserved.byte_size(); |
| 342 | 3062 } |
| 3063 | |
| 3064 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 3065 // assert(false, "NYI"); | |
| 3066 return 0; | |
| 3067 } | |
| 3068 | |
| 3069 void G1CollectedHeap::prepare_for_verify() { | |
| 3070 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 3071 ensure_parsability(false); | |
| 3072 } | |
| 3073 g1_rem_set()->prepare_for_verify(); | |
| 3074 } | |
| 3075 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3076 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3077 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3078 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3079 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3080 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3081 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3082 return hr->obj_allocated_since_next_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3083 case VerifyOption_G1UseMarkWord: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3084 return false; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3085 default: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3086 ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3087 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3088 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
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3089 } |
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3090 |
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3091 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
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3092 switch (vo) { |
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3093 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
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3094 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
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3095 case VerifyOption_G1UseMarkWord: return NULL; |
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3096 default: ShouldNotReachHere(); |
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3097 } |
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3098 return NULL; // keep some compilers happy |
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3099 } |
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3100 |
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3101 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
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3102 switch (vo) { |
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3103 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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3104 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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3105 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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3106 default: ShouldNotReachHere(); |
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3107 } |
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3108 return false; // keep some compilers happy |
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3109 } |
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3110 |
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3111 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
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3112 switch (vo) { |
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3113 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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3114 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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3115 case VerifyOption_G1UseMarkWord: return "NONE"; |
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3116 default: ShouldNotReachHere(); |
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3117 } |
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3118 return NULL; // keep some compilers happy |
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3119 } |
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3120 |
|
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3121 class VerifyRootsClosure: public OopClosure { |
| 12080 | 3122 private: |
| 3123 G1CollectedHeap* _g1h; | |
| 3124 VerifyOption _vo; | |
| 3125 bool _failures; | |
| 3126 public: | |
| 3127 // _vo == UsePrevMarking -> use "prev" marking information, | |
| 3128 // _vo == UseNextMarking -> use "next" marking information, | |
| 3129 // _vo == UseMarkWord -> use mark word from object header. | |
| 3130 VerifyRootsClosure(VerifyOption vo) : | |
| 3131 _g1h(G1CollectedHeap::heap()), | |
| 3132 _vo(vo), | |
| 3133 _failures(false) { } | |
| 3134 | |
| 3135 bool failures() { return _failures; } | |
| 3136 | |
| 3137 template <class T> void do_oop_nv(T* p) { | |
| 3138 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3139 if (!oopDesc::is_null(heap_oop)) { | |
| 3140 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3141 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
| 3142 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
| 3143 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
| 3144 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3145 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
| 3146 } | |
| 3147 obj->print_on(gclog_or_tty); | |
| 3148 _failures = true; | |
| 3149 } | |
| 3150 } | |
| 3151 } | |
| 3152 | |
| 3153 void do_oop(oop* p) { do_oop_nv(p); } | |
| 3154 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 3155 }; | |
| 3156 | |
|
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3157 class G1VerifyCodeRootOopClosure: public OopClosure { |
| 12080 | 3158 G1CollectedHeap* _g1h; |
| 3159 OopClosure* _root_cl; | |
| 3160 nmethod* _nm; | |
| 3161 VerifyOption _vo; | |
| 3162 bool _failures; | |
| 3163 | |
| 3164 template <class T> void do_oop_work(T* p) { | |
| 3165 // First verify that this root is live | |
| 3166 _root_cl->do_oop(p); | |
| 3167 | |
| 3168 if (!G1VerifyHeapRegionCodeRoots) { | |
| 3169 // We're not verifying the code roots attached to heap region. | |
| 3170 return; | |
| 3171 } | |
| 3172 | |
| 3173 // Don't check the code roots during marking verification in a full GC | |
| 3174 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3175 return; | |
| 3176 } | |
| 3177 | |
| 3178 // Now verify that the current nmethod (which contains p) is | |
| 3179 // in the code root list of the heap region containing the | |
| 3180 // object referenced by p. | |
| 3181 | |
| 3182 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3183 if (!oopDesc::is_null(heap_oop)) { | |
| 3184 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3185 | |
| 3186 // Now fetch the region containing the object | |
| 3187 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
| 3188 HeapRegionRemSet* hrrs = hr->rem_set(); | |
| 3189 // Verify that the strong code root list for this region | |
| 3190 // contains the nmethod | |
| 3191 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
| 3192 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
| 3193 "from nmethod "PTR_FORMAT" not in strong " | |
| 3194 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
| 3195 p, _nm, hr->bottom(), hr->end()); | |
| 3196 _failures = true; | |
| 3197 } | |
| 3198 } | |
| 3199 } | |
| 3200 | |
| 3201 public: | |
| 3202 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
| 3203 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
| 3204 | |
| 3205 void do_oop(oop* p) { do_oop_work(p); } | |
| 3206 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 3207 | |
| 3208 void set_nmethod(nmethod* nm) { _nm = nm; } | |
| 3209 bool failures() { return _failures; } | |
| 3210 }; | |
| 3211 | |
| 3212 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
| 3213 G1VerifyCodeRootOopClosure* _oop_cl; | |
| 3214 | |
| 3215 public: | |
| 3216 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
| 3217 _oop_cl(oop_cl) {} | |
| 3218 | |
| 3219 void do_code_blob(CodeBlob* cb) { | |
| 3220 nmethod* nm = cb->as_nmethod_or_null(); | |
| 3221 if (nm != NULL) { | |
| 3222 _oop_cl->set_nmethod(nm); | |
| 3223 nm->oops_do(_oop_cl); | |
| 3224 } | |
| 3225 } | |
| 3226 }; | |
| 3227 | |
| 3228 class YoungRefCounterClosure : public OopClosure { | |
| 3229 G1CollectedHeap* _g1h; | |
| 3230 int _count; | |
| 3231 public: | |
| 3232 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
| 3233 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
| 3234 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 3235 | |
| 3236 int count() { return _count; } | |
| 3237 void reset_count() { _count = 0; }; | |
| 3238 }; | |
| 3239 | |
| 3240 class VerifyKlassClosure: public KlassClosure { | |
| 3241 YoungRefCounterClosure _young_ref_counter_closure; | |
| 3242 OopClosure *_oop_closure; | |
| 3243 public: | |
| 3244 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
| 3245 void do_klass(Klass* k) { | |
| 3246 k->oops_do(_oop_closure); | |
| 3247 | |
| 3248 _young_ref_counter_closure.reset_count(); | |
| 3249 k->oops_do(&_young_ref_counter_closure); | |
| 3250 if (_young_ref_counter_closure.count() > 0) { | |
| 3251 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
| 3252 } | |
| 3253 } | |
| 3254 }; | |
| 3255 | |
| 342 | 3256 class VerifyLivenessOopClosure: public OopClosure { |
|
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3257 G1CollectedHeap* _g1h; |
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|
3258 VerifyOption _vo; |
| 342 | 3259 public: |
|
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3260 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
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3261 _g1h(g1h), _vo(vo) |
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|
3262 { } |
|
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|
3263 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3264 void do_oop( oop *p) { do_oop_work(p); } |
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3265 |
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|
3266 template <class T> void do_oop_work(T *p) { |
|
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|
3267 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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|
3268 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
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|
3269 "Dead object referenced by a not dead object"); |
| 342 | 3270 } |
| 3271 }; | |
| 3272 | |
| 3273 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3274 private: |
| 342 | 3275 G1CollectedHeap* _g1h; |
| 3276 size_t _live_bytes; | |
| 3277 HeapRegion *_hr; | |
|
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|
3278 VerifyOption _vo; |
| 342 | 3279 public: |
|
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|
3280 // _vo == UsePrevMarking -> use "prev" marking information, |
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|
3281 // _vo == UseNextMarking -> use "next" marking information, |
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|
3282 // _vo == UseMarkWord -> use mark word from object header. |
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|
3283 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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|
3284 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3285 _g1h = G1CollectedHeap::heap(); |
| 3286 } | |
| 3287 void do_object(oop o) { | |
|
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|
3288 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3289 assert(o != NULL, "Huh?"); |
|
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3290 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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|
3291 // If the object is alive according to the mark word, |
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|
3292 // then verify that the marking information agrees. |
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|
3293 // Note we can't verify the contra-positive of the |
|
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|
3294 // above: if the object is dead (according to the mark |
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|
3295 // word), it may not be marked, or may have been marked |
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|
3296 // but has since became dead, or may have been allocated |
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|
3297 // since the last marking. |
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|
3298 if (_vo == VerifyOption_G1UseMarkWord) { |
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|
3299 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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|
3300 } |
|
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|
3301 |
|
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|
3302 o->oop_iterate_no_header(&isLive); |
|
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|
3303 if (!_hr->obj_allocated_since_prev_marking(o)) { |
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|
3304 size_t obj_size = o->size(); // Make sure we don't overflow |
|
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|
3305 _live_bytes += (obj_size * HeapWordSize); |
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|
3306 } |
| 342 | 3307 } |
| 3308 } | |
| 3309 size_t live_bytes() { return _live_bytes; } | |
| 3310 }; | |
| 3311 | |
| 3312 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3313 HeapRegion *_hr; | |
| 3314 G1CollectedHeap *_g1; | |
| 3315 public: | |
| 3316 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3317 _g1 = G1CollectedHeap::heap(); | |
| 3318 }; | |
| 3319 | |
| 3320 void do_object(oop o) { | |
| 3321 if (o != NULL) { | |
| 3322 HeapWord *start = (HeapWord *) o; | |
| 3323 size_t word_sz = o->size(); | |
| 3324 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3325 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3326 (void*) o, word_sz, | |
| 3327 _g1->isMarkedPrev(o), | |
| 3328 _g1->isMarkedNext(o), | |
| 3329 _hr->obj_allocated_since_prev_marking(o)); | |
| 3330 HeapWord *end = start + word_sz; | |
| 3331 HeapWord *cur; | |
| 3332 int *val; | |
| 3333 for (cur = start; cur < end; cur++) { | |
| 3334 val = (int *) cur; | |
| 3335 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3336 } | |
| 3337 } | |
| 3338 } | |
| 3339 }; | |
| 3340 | |
| 3341 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3342 private: |
|
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|
3343 bool _par; |
|
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|
3344 VerifyOption _vo; |
|
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3345 bool _failures; |
| 811 | 3346 public: |
|
3772
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|
3347 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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diff
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|
3348 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3349 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3350 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3351 : _par(par), | |
|
3772
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diff
changeset
|
3352 _vo(vo), |
|
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6882730: G1: parallel heap verification messes up region dump
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diff
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|
3353 _failures(false) {} |
|
ff2402f6a50b
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diff
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|
3354 |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
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|
3355 bool failures() { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
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|
3356 return _failures; |
|
ff2402f6a50b
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diff
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|
3357 } |
|
845
df6caf649ff7
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diff
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|
3358 |
| 342 | 3359 bool doHeapRegion(HeapRegion* r) { |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
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|
3360 if (!r->continuesHumongous()) { |
|
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diff
changeset
|
3361 bool failures = false; |
| 6008 | 3362 r->verify(_vo, &failures); |
|
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|
3363 if (failures) { |
|
ff2402f6a50b
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diff
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|
3364 _failures = true; |
|
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diff
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|
3365 } else { |
|
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|
3366 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
1020
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|
3367 r->object_iterate(¬_dead_yet_cl); |
|
4787
2ace1c4ee8da
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diff
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|
3368 if (_vo != VerifyOption_G1UseNextMarking) { |
|
2ace1c4ee8da
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diff
changeset
|
3369 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
2ace1c4ee8da
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diff
changeset
|
3370 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
3371 "max_live_bytes "SIZE_FORMAT" " |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
3372 "< calculated "SIZE_FORMAT, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
3373 r->bottom(), r->end(), |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
3374 r->max_live_bytes(), |
|
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changeset
|
3375 not_dead_yet_cl.live_bytes()); |
|
4787
2ace1c4ee8da
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4785
diff
changeset
|
3376 _failures = true; |
|
2ace1c4ee8da
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parents:
4785
diff
changeset
|
3377 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
3378 } else { |
|
2ace1c4ee8da
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parents:
4785
diff
changeset
|
3379 // When vo == UseNextMarking we cannot currently do a sanity |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
3380 // check on the live bytes as the calculation has not been |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
3381 // finalized yet. |
|
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|
3382 } |
|
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|
3383 } |
| 342 | 3384 } |
|
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diff
changeset
|
3385 return false; // stop the region iteration if we hit a failure |
| 342 | 3386 } |
| 3387 }; | |
| 3388 | |
| 12080 | 3389 // This is the task used for parallel verification of the heap regions |
| 390 | 3390 |
| 3391 class G1ParVerifyTask: public AbstractGangTask { | |
| 3392 private: | |
| 3393 G1CollectedHeap* _g1h; | |
|
3772
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diff
changeset
|
3394 VerifyOption _vo; |
|
6747fd0512e0
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diff
changeset
|
3395 bool _failures; |
| 390 | 3396 |
| 3397 public: | |
|
3772
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diff
changeset
|
3398 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
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diff
changeset
|
3399 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
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|
3400 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3401 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3402 AbstractGangTask("Parallel verify task"), |
|
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6700789: G1: Enable use of compressed oops with G1 heaps
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diff
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|
3403 _g1h(g1h), |
|
3772
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diff
changeset
|
3404 _vo(vo), |
|
1020
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diff
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|
3405 _failures(false) { } |
|
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|
3406 |
|
ff2402f6a50b
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1019
diff
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|
3407 bool failures() { |
|
ff2402f6a50b
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1019
diff
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|
3408 return _failures; |
|
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diff
changeset
|
3409 } |
| 390 | 3410 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
3411 void work(uint worker_id) { |
|
637
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6817419: G1: Enable extensive verification for humongous regions
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diff
changeset
|
3412 HandleMark hm; |
| 6008 | 3413 VerifyRegionClosure blk(true, _vo); |
|
4728
441e946dc1af
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diff
changeset
|
3414 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
4095
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4090
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changeset
|
3415 _g1h->workers()->active_workers(), |
| 390 | 3416 HeapRegion::ParVerifyClaimValue); |
|
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1019
diff
changeset
|
3417 if (blk.failures()) { |
|
ff2402f6a50b
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1019
diff
changeset
|
3418 _failures = true; |
|
ff2402f6a50b
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1019
diff
changeset
|
3419 } |
| 390 | 3420 } |
| 3421 }; | |
| 3422 | |
| 12080 | 3423 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3424 if (SafepointSynchronize::is_at_safepoint()) { |
| 12080 | 3425 assert(Thread::current()->is_VM_thread(), |
| 3426 "Expected to be executed serially by the VM thread at this point"); | |
| 3427 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3428 if (!silent) { gclog_or_tty->print("Roots "); } |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
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diff
changeset
|
3429 VerifyRootsClosure rootsCl(vo); |
| 12080 | 3430 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
| 3431 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
3432 VerifyKlassClosure klassCl(this, &rootsCl); |
|
3772
6747fd0512e0
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3766
diff
changeset
|
3433 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
3289
diff
changeset
|
3434 // We apply the relevant closures to all the oops in the |
|
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
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3289
diff
changeset
|
3435 // 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
|
3436 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
|
3772
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johnc
parents:
3766
diff
changeset
|
3437 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
6629
diff
changeset
|
3438 // Need cleared claim bits for the strong roots processing |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3439 ClassLoaderDataGraph::clear_claimed_marks(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
3440 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
3289
diff
changeset
|
3441 process_strong_roots(true, // activate StrongRootsScope |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3442 false, // we set "is scavenging" to false, |
|
da91efe96a93
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6629
diff
changeset
|
3443 // so we don't reset the dirty cards. |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
changeset
|
3444 ScanningOption(so), // roots scanning options |
| 342 | 3445 &rootsCl, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
3446 &blobsCl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3447 &klassCl |
|
da91efe96a93
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6629
diff
changeset
|
3448 ); |
|
da91efe96a93
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6629
diff
changeset
|
3449 |
| 12080 | 3450 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
|
3772
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3766
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|
3451 |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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3766
diff
changeset
|
3452 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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3766
diff
changeset
|
3453 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
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3766
diff
changeset
|
3454 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
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3766
diff
changeset
|
3455 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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3766
diff
changeset
|
3456 // the region sets when not in a full GC. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
3457 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3458 verify_region_sets(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3459 } |
|
6747fd0512e0
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3766
diff
changeset
|
3460 |
| 2152 | 3461 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3462 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3463 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3464 "sanity check"); | |
| 3465 | |
| 6008 | 3466 G1ParVerifyTask task(this, vo); |
|
4095
bca17e38de00
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4090
diff
changeset
|
3467 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
3468 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
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4090
diff
changeset
|
3469 "If not dynamic should be using all the workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
3470 int n_workers = workers()->active_workers(); |
| 390 | 3471 set_par_threads(n_workers); |
| 3472 workers()->run_task(&task); | |
| 3473 set_par_threads(0); | |
|
1020
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1019
diff
changeset
|
3474 if (task.failures()) { |
|
ff2402f6a50b
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diff
changeset
|
3475 failures = true; |
|
ff2402f6a50b
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1019
diff
changeset
|
3476 } |
| 390 | 3477 |
|
4095
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4090
diff
changeset
|
3478 // Checks that the expected amount of parallel work was done. |
|
bca17e38de00
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4090
diff
changeset
|
3479 // The implication is that n_workers is > 0. |
| 390 | 3480 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3481 "sanity check"); | |
| 3482 | |
| 3483 reset_heap_region_claim_values(); | |
| 3484 | |
| 3485 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3486 "sanity check"); | |
| 3487 } else { | |
| 6008 | 3488 VerifyRegionClosure blk(false, vo); |
| 3766 | 3489 heap_region_iterate(&blk); |
|
1020
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1019
diff
changeset
|
3490 if (blk.failures()) { |
|
ff2402f6a50b
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1019
diff
changeset
|
3491 failures = true; |
|
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1019
diff
changeset
|
3492 } |
| 390 | 3493 } |
| 2152 | 3494 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3495 rem_set()->verify(); |
|
1020
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diff
changeset
|
3496 |
| 17764 | 3497 if (G1StringDedup::is_enabled()) { |
| 3498 if (!silent) gclog_or_tty->print("StrDedup "); | |
| 3499 G1StringDedup::verify(); | |
| 3500 } | |
| 3501 | |
|
1020
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diff
changeset
|
3502 if (failures) { |
|
ff2402f6a50b
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parents:
1019
diff
changeset
|
3503 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3504 // It helps to have the per-region information in the output to |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3505 // help us track down what went wrong. This is why we call |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3506 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3507 print_extended_on(gclog_or_tty); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3508 gclog_or_tty->cr(); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3509 #ifndef PRODUCT |
| 1044 | 3510 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3511 concurrent_mark()->print_reachable("at-verification-failure", |
|
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diff
changeset
|
3512 vo, false /* all */); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3513 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3514 #endif |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3515 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3516 } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
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|
3517 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3518 } else { |
| 17764 | 3519 if (!silent) { |
| 3520 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
| 3521 if (G1StringDedup::is_enabled()) { | |
| 3522 gclog_or_tty->print(", StrDedup"); | |
| 3523 } | |
| 3524 gclog_or_tty->print(") "); | |
| 3525 } | |
| 342 | 3526 } |
| 3527 } | |
| 3528 | |
| 12080 | 3529 void G1CollectedHeap::verify(bool silent) { |
| 3530 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3531 } | |
| 3532 | |
| 3533 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
| 3534 double verify_time_ms = 0.0; | |
| 3535 | |
| 3536 if (guard && total_collections() >= VerifyGCStartAt) { | |
| 3537 double verify_start = os::elapsedTime(); | |
| 3538 HandleMark hm; // Discard invalid handles created during verification | |
| 3539 prepare_for_verify(); | |
| 3540 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
| 3541 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
| 3542 } | |
| 3543 | |
| 3544 return verify_time_ms; | |
| 3545 } | |
| 3546 | |
| 3547 void G1CollectedHeap::verify_before_gc() { | |
| 3548 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
| 3549 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
| 3550 } | |
| 3551 | |
| 3552 void G1CollectedHeap::verify_after_gc() { | |
| 3553 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
| 3554 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
| 3555 } | |
| 3556 | |
| 342 | 3557 class PrintRegionClosure: public HeapRegionClosure { |
| 3558 outputStream* _st; | |
| 3559 public: | |
| 3560 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3561 bool doHeapRegion(HeapRegion* r) { | |
| 3562 r->print_on(_st); | |
| 3563 return false; | |
| 3564 } | |
| 3565 }; | |
| 3566 | |
|
17833
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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17774
diff
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|
3567 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
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|
3568 const HeapRegion* hr, |
|
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8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3569 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
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|
3570 switch (vo) { |
|
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diff
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|
3571 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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17774
diff
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|
3572 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3573 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
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|
3574 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
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|
3575 } |
|
bfdf528be8e8
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diff
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|
3576 return false; // keep some compilers happy |
|
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8038498: Fix includes and C inlining after 8035330
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diff
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|
3577 } |
|
bfdf528be8e8
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diff
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|
3578 |
|
bfdf528be8e8
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diff
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|
3579 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
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|
3580 const VerifyOption vo) const { |
|
bfdf528be8e8
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diff
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|
3581 switch (vo) { |
|
bfdf528be8e8
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diff
changeset
|
3582 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3583 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
|
bfdf528be8e8
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tschatzl
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diff
changeset
|
3584 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
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|
3585 default: ShouldNotReachHere(); |
|
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diff
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|
3586 } |
|
bfdf528be8e8
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17774
diff
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|
3587 return false; // keep some compilers happy |
|
bfdf528be8e8
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tschatzl
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diff
changeset
|
3588 } |
|
bfdf528be8e8
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diff
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|
3589 |
| 342 | 3590 void G1CollectedHeap::print_on(outputStream* st) const { |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
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|
3591 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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diff
changeset
|
3592 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
|
3593 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3594 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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parents:
811
diff
changeset
|
3595 _g1_storage.low_boundary(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3596 _g1_storage.high(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3597 _g1_storage.high_boundary()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3598 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3599 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
|
3600 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3601 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
|
3602 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3603 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
|
3604 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
|
3605 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3606 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3607 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3608 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3609 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3610 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3611 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3612 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3613 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3614 st->cr(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3615 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
|
3616 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3617 "CS=collection set, F=free, TS=gc time stamp, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3618 "PTAMS=previous top-at-mark-start, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3619 "NTAMS=next top-at-mark-start)"); |
| 342 | 3620 PrintRegionClosure blk(st); |
| 3766 | 3621 heap_region_iterate(&blk); |
| 342 | 3622 } |
| 3623 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3624 void G1CollectedHeap::print_on_error(outputStream* st) const { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3625 this->CollectedHeap::print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3626 |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3627 if (_cm != NULL) { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3628 st->cr(); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3629 _cm->print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3630 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3631 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3632 |
| 342 | 3633 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3634 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3635 workers()->print_worker_threads_on(st); |
| 3636 } | |
| 3637 _cmThread->print_on(st); | |
| 342 | 3638 st->cr(); |
| 1019 | 3639 _cm->print_worker_threads_on(st); |
| 3640 _cg1r->print_worker_threads_on(st); | |
| 17764 | 3641 if (G1StringDedup::is_enabled()) { |
| 3642 G1StringDedup::print_worker_threads_on(st); | |
| 3643 } | |
| 342 | 3644 } |
| 3645 | |
| 3646 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3647 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3648 workers()->threads_do(tc); |
| 3649 } | |
| 3650 tc->do_thread(_cmThread); | |
| 794 | 3651 _cg1r->threads_do(tc); |
| 17764 | 3652 if (G1StringDedup::is_enabled()) { |
| 3653 G1StringDedup::threads_do(tc); | |
| 3654 } | |
| 342 | 3655 } |
| 3656 | |
| 3657 void G1CollectedHeap::print_tracing_info() const { | |
| 3658 // We'll overload this to mean "trace GC pause statistics." | |
| 3659 if (TraceGen0Time || TraceGen1Time) { | |
| 3660 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3661 // to that. | |
| 3662 g1_policy()->print_tracing_info(); | |
| 3663 } | |
| 751 | 3664 if (G1SummarizeRSetStats) { |
| 342 | 3665 g1_rem_set()->print_summary_info(); |
| 3666 } | |
| 1282 | 3667 if (G1SummarizeConcMark) { |
| 342 | 3668 concurrent_mark()->print_summary_info(); |
| 3669 } | |
| 3670 g1_policy()->print_yg_surv_rate_info(); | |
| 3671 SpecializationStats::print(); | |
| 3672 } | |
| 3673 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3674 #ifndef PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3675 // Helpful for debugging RSet issues. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3676 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3677 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3678 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3679 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3680 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3681 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3682 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3683 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3684 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3685 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3686 _occupied_sum += occupied; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3687 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3688 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3689 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3690 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3691 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3692 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3693 hrrs->print(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3694 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3695 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3696 return false; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3697 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3698 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3699 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3700 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3701 gclog_or_tty->print_cr("========================================"); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3702 gclog_or_tty->print_cr("%s", msg); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3703 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3704 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3705 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3706 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3707 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3708 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3709 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3710 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3711 }; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3712 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3713 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3714 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3715 collection_set_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3716 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3717 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3718 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3719 PrintRSetsClosure cl("Printing All RSets");; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3720 heap_region_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3721 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3722 #endif // PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3723 |
| 342 | 3724 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3725 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3726 "not a garbage-first heap"); | |
| 3727 return _g1h; | |
| 3728 } | |
| 3729 | |
| 3730 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
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parents:
1166
diff
changeset
|
3731 // always_do_update_barrier = false; |
| 342 | 3732 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3733 // Fill TLAB's and such | |
| 17727 | 3734 accumulate_statistics_all_tlabs(); |
| 342 | 3735 ensure_parsability(true); |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3736 |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3737 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3738 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3739 g1_rem_set()->print_periodic_summary_info("Before GC RS summary"); |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3740 } |
| 342 | 3741 } |
| 3742 | |
| 3743 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3744 |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3745 if (G1SummarizeRSetStats && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3746 (G1SummarizeRSetStatsPeriod > 0) && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3747 // we are at the end of the GC. Total collections has already been increased. |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3748 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3749 g1_rem_set()->print_periodic_summary_info("After GC RS summary"); |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3750 } |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3751 |
| 342 | 3752 // FIXME: what is this about? |
| 3753 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3754 // is set. | |
| 3755 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3756 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3757 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3758 |
| 17727 | 3759 resize_all_tlabs(); |
| 3760 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3761 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3762 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3763 Universe::update_heap_info_at_gc(); |
| 342 | 3764 } |
| 3765 | |
| 1973 | 3766 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3767 unsigned int gc_count_before, | |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3768 bool* succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3769 GCCause::Cause gc_cause) { |
| 1973 | 3770 assert_heap_not_locked_and_not_at_safepoint(); |
| 342 | 3771 g1_policy()->record_stop_world_start(); |
| 1973 | 3772 VM_G1IncCollectionPause op(gc_count_before, |
| 3773 word_size, | |
| 3774 false, /* should_initiate_conc_mark */ | |
| 3775 g1_policy()->max_pause_time_ms(), | |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3776 gc_cause); |
| 1973 | 3777 VMThread::execute(&op); |
| 3778 | |
| 3779 HeapWord* result = op.result(); | |
| 3780 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3781 assert(result == NULL || ret_succeeded, | |
| 3782 "the result should be NULL if the VM did not succeed"); | |
| 3783 *succeeded = ret_succeeded; | |
| 3784 | |
| 3785 assert_heap_not_locked(); | |
| 3786 return result; | |
| 342 | 3787 } |
| 3788 | |
| 3789 void | |
| 3790 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3791 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3792 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3793 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3794 CGC_lock->notify(); |
| 342 | 3795 } |
| 3796 } | |
| 3797 | |
| 3798 size_t G1CollectedHeap::pending_card_num() { | |
| 3799 size_t extra_cards = 0; | |
| 3800 JavaThread *curr = Threads::first(); | |
| 3801 while (curr != NULL) { | |
| 3802 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3803 extra_cards += dcq.size(); | |
| 3804 curr = curr->next(); | |
| 3805 } | |
| 3806 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3807 size_t buffer_size = dcqs.buffer_size(); | |
| 3808 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3809 |
| 3810 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3811 // in bytes - not the number of 'entries'. We need to convert | |
| 3812 // into a number of cards. | |
| 3813 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3814 } |
| 3815 | |
| 3816 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3817 return g1_rem_set()->cardsScanned(); |
| 342 | 3818 } |
| 3819 | |
| 3820 void | |
| 3821 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3822 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3823 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3824 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3825 if (_surviving_young_words == NULL) { |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3826 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
| 342 | 3827 "Not enough space for young surv words summary."); |
| 3828 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3829 memset(_surviving_young_words, 0, (size_t) array_length * sizeof(size_t)); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3830 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3831 for (uint i = 0; i < array_length; ++i) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3832 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3833 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3834 #endif // !ASSERT |
| 342 | 3835 } |
| 3836 | |
| 3837 void | |
| 3838 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3839 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
|
3840 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
|
3841 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3842 _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
|
3843 } |
| 342 | 3844 } |
| 3845 | |
| 3846 void | |
| 3847 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3848 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3849 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3850 _surviving_young_words = NULL; |
| 3851 } | |
| 3852 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3853 #ifdef ASSERT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3854 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3855 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3856 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3857 // 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
|
3858 // 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
|
3859 // 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
|
3860 // 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
|
3861 // 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
|
3862 // 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
|
3863 // 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
|
3864 // 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
|
3865 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3866 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
|
3867 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3868 // 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
|
3869 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3870 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3871 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3872 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3873 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3874 |
| 1709 | 3875 #if TASKQUEUE_STATS |
| 3876 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3877 st->print_raw_cr("GC Task Stats"); | |
| 3878 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3879 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3880 } | |
| 3881 | |
| 3882 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3883 print_taskqueue_stats_hdr(st); | |
| 3884 | |
| 3885 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3886 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3887 for (int i = 0; i < n; ++i) { |
| 3888 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3889 totals += task_queue(i)->stats; | |
| 3890 } | |
| 3891 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3892 | |
| 3893 DEBUG_ONLY(totals.verify()); | |
| 3894 } | |
| 3895 | |
| 3896 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3897 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3898 for (int i = 0; i < n; ++i) { |
| 3899 task_queue(i)->stats.reset(); | |
| 3900 } | |
| 3901 } | |
| 3902 #endif // TASKQUEUE_STATS | |
| 3903 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3904 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3905 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3906 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3907 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3908 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3909 gclog_or_tty->date_stamp(PrintGCDateStamps); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3910 gclog_or_tty->stamp(PrintGCTimeStamps); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3911 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3912 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
|
3913 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3914 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3915 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3916 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3917 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3918 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3919 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3920 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3921 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3922 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3923 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3924 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3925 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3926 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3927 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3928 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
|
3929 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3930 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3931 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3932 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3933 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3934 gclog_or_tty->print("--"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3935 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3936 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3937 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
|
3938 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3939 gclog_or_tty->flush(); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3940 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3941 |
| 1973 | 3942 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3943 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3944 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3945 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3946 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3947 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3948 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3949 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3950 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3951 _gc_timer_stw->register_gc_start(); |
| 10405 | 3952 |
| 3953 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
| 3954 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3955 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3956 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3957 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3958 print_heap_before_gc(); |
| 10405 | 3959 trace_heap_before_gc(_gc_tracer_stw); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3960 |
| 2152 | 3961 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3962 verify_dirty_young_regions(); |
| 2152 | 3963 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3964 // 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
|
3965 // 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
|
3966 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3967 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3968 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3969 // 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
|
3970 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3971 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3972 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3973 // 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
|
3974 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
|
3975 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3976 // 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
|
3977 // 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
|
3978 // 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
|
3979 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
|
3980 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3981 // 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
|
3982 { |
| 10405 | 3983 EvacuationInfo evacuation_info; |
| 3984 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3985 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3986 // 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
|
3987 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3988 increment_old_marking_cycles_started(); |
| 10405 | 3989 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
|
3990 } |
| 10405 | 3991 |
| 3992 _gc_tracer_stw->report_yc_type(yc_type()); | |
| 3993 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3994 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3995 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3996 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
|
3997 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
|
3998 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
|
3999 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
4000 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4001 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
4002 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
4003 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
4004 |
| 2361 | 4005 // If the secondary_free_list is not empty, append it to the |
| 4006 // free_list. No need to wait for the cleanup operation to finish; | |
| 4007 // the region allocation code will check the secondary_free_list | |
| 4008 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 4009 // set, skip this step so that the region allocation code has to | |
| 4010 // get entries from the secondary_free_list. | |
| 2152 | 4011 if (!G1StressConcRegionFreeing) { |
| 2361 | 4012 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 4013 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4014 |
| 12080 | 4015 assert(check_young_list_well_formed(), "young list should be well formed"); |
| 4016 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 4017 "sanity check"); | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4018 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4019 // 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
|
4020 // 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
|
4021 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4022 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4023 { // 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
|
4024 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4025 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4026 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4027 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
|
4028 increment_gc_time_stamp(); |
| 342 | 4029 |
|
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
|
4030 verify_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4031 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4032 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4033 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4034 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4035 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4036 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4038 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4039 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4040 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4043 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4044 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4045 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4046 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4047 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4048 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4049 // 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
|
4050 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4051 release_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4052 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4053 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4054 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4055 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4056 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4057 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4058 // 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
|
4059 // 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
|
4060 // 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
|
4061 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4062 // 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
|
4063 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4065 // 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
|
4066 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4067 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4068 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4069 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4070 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4071 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
|
4072 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4073 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4074 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
|
4075 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4076 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4077 // 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
|
4078 // 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
|
4079 // 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
|
4080 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4081 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
|
4082 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4083 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4084 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
|
4085 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
|
4086 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4087 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
|
4088 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4089 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4090 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4091 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4092 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4093 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4094 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4095 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4096 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4097 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4098 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4099 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4100 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4101 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
|
4102 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4103 |
| 10405 | 4104 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4105 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4106 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4107 // 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
|
4108 // 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
|
4109 // 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
|
4110 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4111 _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
|
4112 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4113 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4114 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4115 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4117 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4118 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4119 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4120 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4121 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4129 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4130 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4131 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4132 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4133 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4134 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4135 #endif // ASSERT |
| 1707 | 4136 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4137 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4138 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4139 // Initialize the GC alloc regions. |
| 10405 | 4140 init_gc_alloc_regions(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4141 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4142 // Actually do the work... |
| 10405 | 4143 evacuate_collection_set(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4144 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4145 // 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
|
4146 // (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
|
4147 // 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
|
4148 // 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
|
4149 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4150 _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
|
4151 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4152 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4153 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4154 |
| 10405 | 4155 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 cleanup_surviving_young_words(); |
|
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 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4164 // regions to the incremental collection set for the next |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4165 // evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4173 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4174 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 "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
|
4176 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4177 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4178 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4179 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4180 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4181 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4182 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
| 10405 | 4183 _young_list->first_survivor_region(), |
| 4184 _young_list->last_survivor_region()); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4185 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4186 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4187 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4188 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4189 _summary_bytes_used = recalculate_used(); |
| 10405 | 4190 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
| 4191 for (uint i = 0; i < n_queues; i++) { | |
| 4192 if (_evacuation_failed_info_array[i].has_failed()) { | |
| 4193 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
| 4194 } | |
| 4195 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4196 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4197 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4198 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4199 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4200 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4201 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4202 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4203 // 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
|
4204 // 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
|
4205 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4206 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4207 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4208 // 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
|
4209 // 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
|
4210 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4211 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4212 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4213 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4214 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4215 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4216 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4217 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4218 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
|
4219 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4220 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4221 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4222 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4223 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4224 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4225 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4226 size_t bytes_before = capacity(); |
| 4785 | 4227 // No need for an ergo verbose message here, |
| 4228 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4229 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4230 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4231 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4232 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4233 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4234 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4235 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4236 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4237 |
| 10405 | 4238 // 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
|
4239 // 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
|
4240 _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
|
4241 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4242 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4243 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4244 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4245 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4246 // 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
|
4247 // 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
|
4248 // 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
|
4249 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
|
4250 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
| 10405 | 4251 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
|
4252 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4253 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4254 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4255 // 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
|
4256 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4257 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4258 // 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
|
4259 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4260 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4261 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4262 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4263 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4264 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4265 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4266 // 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
|
4267 // 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
|
4268 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4269 // 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
|
4270 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4271 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4272 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4273 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4274 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4275 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4276 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4277 |
|
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
|
4278 verify_after_gc(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4279 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4280 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4281 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4282 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4283 // 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
|
4284 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4285 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4286 // 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
|
4287 // 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
|
4288 // 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
|
4289 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4290 _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
|
4291 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4292 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4293 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4294 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4295 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4296 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4297 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4298 #endif |
| 342 | 4299 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4300 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4301 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4302 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4303 // 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
|
4304 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
|
4305 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4306 // 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
|
4307 // 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
|
4308 // 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
|
4309 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4310 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4311 _hrs.verify_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4312 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4313 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4314 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
|
4315 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4316 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4317 print_heap_after_gc(); |
| 10405 | 4318 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
|
4319 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4320 // 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
|
4321 // 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
|
4322 // 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
|
4323 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4324 g1mm()->update_sizes(); |
| 10405 | 4325 |
| 4326 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
| 4327 _gc_tracer_stw->report_tenuring_threshold(_g1_policy->tenuring_threshold()); | |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
4328 _gc_timer_stw->register_gc_end(); |
| 10405 | 4329 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
| 4330 } | |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4331 // 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
|
4332 // 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
|
4333 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4334 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4335 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4336 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4337 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4338 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4339 // 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
|
4340 // 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
|
4341 // 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
|
4342 // ConcurrentGCThread::safepoint_desynchronize(). |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4343 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4344 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4345 |
| 1973 | 4346 return true; |
| 342 | 4347 } |
| 4348 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4349 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4350 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4351 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4352 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4353 case GCAllocForSurvived: |
| 6595 | 4354 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4355 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4356 case GCAllocForTenured: |
| 6595 | 4357 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4358 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4359 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4360 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4361 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4362 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4363 } |
| 6595 | 4364 |
| 4365 // Prevent humongous PLAB sizes for two reasons: | |
| 4366 // * PLABs are allocated using a similar paths as oops, but should | |
| 4367 // never be in a humongous region | |
| 4368 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4369 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
|
4370 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4371 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4372 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4373 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4374 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4375 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4376 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4377 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4378 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4379 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4380 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4381 |
| 10405 | 4382 void G1CollectedHeap::init_gc_alloc_regions(EvacuationInfo& evacuation_info) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4383 assert_at_safepoint(true /* should_be_vm_thread */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4384 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4385 _survivor_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4386 _old_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4387 HeapRegion* retained_region = _retained_old_gc_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4388 _retained_old_gc_alloc_region = NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4389 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4390 // We will discard the current GC alloc region if: |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4391 // a) it's in the collection set (it can happen!), |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4392 // b) it's already full (no point in using it), |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4393 // c) it's empty (this means that it was emptied during |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4394 // a cleanup and it should be on the free list now), or |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4395 // d) it's humongous (this means that it was emptied |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4396 // during a cleanup and was added to the free list, but |
| 10405 | 4397 // has been subsequently used to allocate a humongous |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4398 // object that may be less than the region size). |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4399 if (retained_region != NULL && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4400 !retained_region->in_collection_set() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4401 !(retained_region->top() == retained_region->end()) && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4402 !retained_region->is_empty() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4403 !retained_region->isHumongous()) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4404 retained_region->set_saved_mark(); |
| 4072 | 4405 // The retained region was added to the old region set when it was |
| 4406 // retired. We have to remove it now, since we don't allow regions | |
| 4407 // we allocate to in the region sets. We'll re-add it later, when | |
| 4408 // it's retired again. | |
| 4409 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4410 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4411 retained_region->note_start_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4412 _old_gc_alloc_region.set(retained_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4413 _hr_printer.reuse(retained_region); |
| 10405 | 4414 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
| 4415 } | |
| 4416 } | |
| 4417 | |
| 4418 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { | |
| 4419 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
| 4420 _old_gc_alloc_region.count()); | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4421 _survivor_gc_alloc_region.release(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4422 // If we have an old GC alloc region to release, we'll save it in |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4423 // _retained_old_gc_alloc_region. If we don't |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4424 // _retained_old_gc_alloc_region will become NULL. This is what we |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4425 // want either way so no reason to check explicitly for either |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4426 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4427 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 6595 | 4428 |
| 4429 if (ResizePLAB) { | |
| 6819 | 4430 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
| 4431 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
| 6595 | 4432 } |
| 342 | 4433 } |
| 4434 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
4435 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
|
4436 assert(_survivor_gc_alloc_region.get() == NULL, "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
4437 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
|
4438 _retained_old_gc_alloc_region = NULL; |
| 342 | 4439 } |
| 4440 | |
| 4441 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4442 _drain_in_progress = false; | |
| 4443 set_evac_failure_closure(cl); | |
| 6197 | 4444 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4445 } |
| 4446 | |
| 4447 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4448 assert(_evac_failure_scan_stack != NULL && | |
| 4449 _evac_failure_scan_stack->length() == 0, | |
| 4450 "Postcondition"); | |
| 4451 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4452 delete _evac_failure_scan_stack; |
| 342 | 4453 _evac_failure_scan_stack = NULL; |
| 4454 } | |
| 4455 | |
| 4456 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
|
4457 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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4781
diff
changeset
|
4458 |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
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17756
diff
changeset
|
4459 double remove_self_forwards_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
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17756
diff
changeset
|
4460 |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4461 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4462 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4463 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4464 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4465 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4466 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4467 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4468 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4469 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4470 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4471 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
|
4472 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4473 // 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
|
4474 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4475 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4476 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4477 |
| 4478 // Now restore saved marks, if any. | |
|
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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7455
diff
changeset
|
4479 assert(_objs_with_preserved_marks.size() == |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
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diff
changeset
|
4480 _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
|
4481 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
|
4482 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
|
4483 markOop m = _preserved_marks_of_objs.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
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diff
changeset
|
4484 obj->set_mark(m); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4485 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4486 _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
|
4487 _preserved_marks_of_objs.clear(true); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4488 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4489 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
| 342 | 4490 } |
| 4491 | |
| 4492 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4493 _evac_failure_scan_stack->push(obj); | |
| 4494 } | |
| 4495 | |
| 4496 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4497 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4498 | |
| 4499 while (_evac_failure_scan_stack->length() > 0) { | |
| 4500 oop obj = _evac_failure_scan_stack->pop(); | |
| 4501 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4502 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4503 } | |
| 4504 } | |
| 4505 | |
| 4506 oop | |
| 10405 | 4507 G1CollectedHeap::handle_evacuation_failure_par(G1ParScanThreadState* _par_scan_state, |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4508 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
|
4509 assert(obj_in_cs(old), |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4510 err_msg("obj: "PTR_FORMAT" should still be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4511 (HeapWord*) old)); |
| 342 | 4512 markOop m = old->mark(); |
| 4513 oop forward_ptr = old->forward_to_atomic(old); | |
| 4514 if (forward_ptr == NULL) { | |
| 4515 // Forward-to-self succeeded. | |
| 10405 | 4516 assert(_par_scan_state != NULL, "par scan state"); |
| 4517 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
| 4518 uint queue_num = _par_scan_state->queue_num(); | |
| 4519 | |
| 4520 _evacuation_failed = true; | |
| 4521 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
| 342 | 4522 if (_evac_failure_closure != cl) { |
| 4523 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4524 assert(!_drain_in_progress, | |
| 4525 "Should only be true while someone holds the lock."); | |
| 4526 // Set the global evac-failure closure to the current thread's. | |
| 4527 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4528 set_evac_failure_closure(cl); | |
| 4529 // Now do the common part. | |
| 4530 handle_evacuation_failure_common(old, m); | |
| 4531 // Reset to NULL. | |
| 4532 set_evac_failure_closure(NULL); | |
| 4533 } else { | |
| 4534 // The lock is already held, and this is recursive. | |
| 4535 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4536 handle_evacuation_failure_common(old, m); | |
| 4537 } | |
| 4538 return old; | |
| 4539 } else { | |
|
3323
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4540 // 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
|
4541 // 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
|
4542 // 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
|
4543 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
|
4544 err_msg("obj: "PTR_FORMAT" forwarded to: "PTR_FORMAT" " |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4545 "should not be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4546 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4547 return forward_ptr; |
| 4548 } | |
| 4549 } | |
| 4550 | |
| 4551 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4552 preserve_mark_if_necessary(old, m); | |
| 4553 | |
| 4554 HeapRegion* r = heap_region_containing(old); | |
| 4555 if (!r->evacuation_failed()) { | |
| 4556 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4557 _hr_printer.evac_failure(r); |
| 342 | 4558 } |
| 4559 | |
| 4560 push_on_evac_failure_scan_stack(old); | |
| 4561 | |
| 4562 if (!_drain_in_progress) { | |
| 4563 // prevent recursion in copy_to_survivor_space() | |
| 4564 _drain_in_progress = true; | |
| 4565 drain_evac_failure_scan_stack(); | |
| 4566 _drain_in_progress = false; | |
| 4567 } | |
| 4568 } | |
| 4569 | |
| 4570 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
|
4571 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4572 // 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
|
4573 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4574 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
|
4575 _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
|
4576 _preserved_marks_of_objs.push(m); |
| 342 | 4577 } |
| 4578 } | |
| 4579 | |
| 4580 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4581 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4582 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4583 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
|
4584 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4585 return result; |
| 342 | 4586 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4587 // 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
|
4588 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4589 return old_attempt_allocation(word_size); |
| 342 | 4590 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4591 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4592 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4593 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
|
4594 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4595 return result; |
| 342 | 4596 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4597 // 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
|
4598 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4599 return survivor_attempt_allocation(word_size); |
| 342 | 4600 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4601 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4602 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4603 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4604 // 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
|
4605 return NULL; |
| 342 | 4606 } |
| 4607 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4608 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
|
4609 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4610 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4611 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num, ReferenceProcessor* rp) |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4612 : _g1h(g1h), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4613 _refs(g1h->task_queue(queue_num)), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4614 _dcq(&g1h->dirty_card_queue_set()), |
| 12343 | 4615 _ct_bs(g1h->g1_barrier_set()), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4616 _g1_rem(g1h->g1_rem_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4617 _hash_seed(17), _queue_num(queue_num), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4618 _term_attempts(0), |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4619 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4620 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4621 _age_table(false), _scanner(g1h, this, rp), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4622 _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
|
4623 _alloc_buffer_waste(0), _undo_waste(0) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4624 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4625 // 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
|
4626 // non-young regions (where the age is -1) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4627 // 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
|
4628 // an attempt to eliminate cache contention |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4629 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
|
4630 uint array_length = PADDING_ELEM_NUM + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4631 real_length + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4632 PADDING_ELEM_NUM; |
| 6197 | 4633 _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
|
4634 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
|
4635 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
|
4636 "Not enough space for young surv histo."); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4637 _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
|
4638 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
|
4639 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4640 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4641 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4642 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4643 _start = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4644 } |
| 342 | 4645 |
| 1709 | 4646 void |
| 4647 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
| 4648 { | |
| 4649 st->print_raw_cr("GC Termination Stats"); | |
| 4650 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
| 4651 " ------waste (KiB)------"); | |
| 4652 st->print_raw_cr("thr ms ms % ms % attempts" | |
| 4653 " total alloc undo"); | |
| 4654 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
| 4655 " ------- ------- -------"); | |
| 4656 } | |
| 4657 | |
| 4658 void | |
| 4659 G1ParScanThreadState::print_termination_stats(int i, | |
| 4660 outputStream* const st) const | |
| 4661 { | |
| 4662 const double elapsed_ms = elapsed_time() * 1000.0; | |
| 4663 const double s_roots_ms = strong_roots_time() * 1000.0; | |
| 4664 const double term_ms = term_time() * 1000.0; | |
| 4665 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
| 4666 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
| 4667 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
| 4668 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
| 4669 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
| 4670 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
| 4671 alloc_buffer_waste() * HeapWordSize / K, | |
| 4672 undo_waste() * HeapWordSize / K); | |
| 4673 } | |
| 4674 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4675 #ifdef ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4676 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4677 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4678 assert(UseCompressedOops, "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4679 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4680 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4681 assert(_g1h->is_in_g1_reserved(p), |
|
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4682 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4683 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4684 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4685 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4686 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4687 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4688 if (has_partial_array_mask(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4689 // Must be in the collection set--it's already been copied. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4690 oop p = clear_partial_array_mask(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4691 assert(_g1h->obj_in_cs(p), |
|
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4692 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4693 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4694 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4695 assert(_g1h->is_in_g1_reserved(p), |
|
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4696 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4697 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4698 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4699 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4700 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4701 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4702 if (ref.is_narrow()) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4703 return verify_ref((narrowOop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4704 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4705 return verify_ref((oop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4706 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4707 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4708 #endif // ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4709 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4710 void G1ParScanThreadState::trim_queue() { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4711 assert(_evac_failure_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4712 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4713 StarTask ref; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4714 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4715 // Drain the overflow stack first, so other threads can steal. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4716 while (refs()->pop_overflow(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4717 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4718 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4719 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4720 while (refs()->pop_local(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4721 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4722 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4723 } while (!refs()->is_empty()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4724 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4725 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4726 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4727 G1ParScanThreadState* par_scan_state) : |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4728 _g1(g1), _par_scan_state(par_scan_state), |
|
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4729 _worker_id(par_scan_state->queue_num()) { } |
|
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4730 |
|
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4731 void G1ParCopyHelper::mark_object(oop obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4732 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4733 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4734 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4735 assert(!hr->in_collection_set(), "should not mark objects in the CSet"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4736 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4737 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4738 // We know that the object is not moving so it's safe to read its size. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4739 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4740 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4741 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4742 void G1ParCopyHelper::mark_forwarded_object(oop from_obj, oop to_obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4743 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4744 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
|
4745 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
|
4746 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
|
4747 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4748 HeapRegion* from_hr = _g1->heap_region_containing(from_obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4749 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4750 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
|
4751 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4752 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
|
4753 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4754 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
|
4755 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4756 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4757 // 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
|
4758 // 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
|
4759 // 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
|
4760 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4761 _cm->grayRoot(to_obj, (size_t) from_obj->size(), _worker_id); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4762 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4763 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4764 oop G1ParScanThreadState::copy_to_survivor_space(oop const old) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4765 size_t word_sz = old->size(); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4766 HeapRegion* from_region = _g1h->heap_region_containing_raw(old); |
| 342 | 4767 // +1 to make the -1 indexes valid... |
| 4768 int young_index = from_region->young_index_in_cset()+1; | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4769 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
|
4770 (!from_region->is_young() && young_index == 0), "invariant" ); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4771 G1CollectorPolicy* g1p = _g1h->g1_policy(); |
| 342 | 4772 markOop m = old->mark(); |
| 545 | 4773 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
| 4774 : m->age(); | |
| 4775 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
| 342 | 4776 word_sz); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4777 HeapWord* obj_ptr = allocate(alloc_purpose, word_sz); |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4778 #ifndef PRODUCT |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4779 // Should this evacuation fail? |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4780 if (_g1h->evacuation_should_fail()) { |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4781 if (obj_ptr != NULL) { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4782 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4783 obj_ptr = NULL; |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4784 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4785 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4786 #endif // !PRODUCT |
| 342 | 4787 |
| 4788 if (obj_ptr == NULL) { | |
| 4789 // This will either forward-to-self, or detect that someone else has | |
| 4790 // installed a forwarding pointer. | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4791 return _g1h->handle_evacuation_failure_par(this, old); |
| 342 | 4792 } |
| 4793 | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4794 oop obj = oop(obj_ptr); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4795 |
| 526 | 4796 // We're going to allocate linearly, so might as well prefetch ahead. |
| 4797 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
| 4798 | |
| 342 | 4799 oop forward_ptr = old->forward_to_atomic(obj); |
| 4800 if (forward_ptr == NULL) { | |
| 4801 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
|
17749
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4802 |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4803 // alloc_purpose is just a hint to allocate() above, recheck the type of region |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4804 // we actually allocated from and update alloc_purpose accordingly |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4805 HeapRegion* to_region = _g1h->heap_region_containing_raw(obj_ptr); |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4806 alloc_purpose = to_region->is_young() ? GCAllocForSurvived : GCAllocForTenured; |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4807 |
| 526 | 4808 if (g1p->track_object_age(alloc_purpose)) { |
| 4809 // We could simply do obj->incr_age(). However, this causes a | |
| 4810 // performance issue. obj->incr_age() will first check whether | |
| 4811 // the object has a displaced mark by checking its mark word; | |
| 4812 // getting the mark word from the new location of the object | |
| 4813 // stalls. So, given that we already have the mark word and we | |
| 4814 // are about to install it anyway, it's better to increase the | |
| 4815 // age on the mark word, when the object does not have a | |
| 4816 // displaced mark word. We're not expecting many objects to have | |
| 4817 // a displaced marked word, so that case is not optimized | |
| 4818 // further (it could be...) and we simply call obj->incr_age(). | |
| 4819 | |
| 4820 if (m->has_displaced_mark_helper()) { | |
| 4821 // in this case, we have to install the mark word first, | |
| 4822 // otherwise obj looks to be forwarded (the old mark word, | |
| 4823 // which contains the forward pointer, was copied) | |
| 4824 obj->set_mark(m); | |
| 4825 obj->incr_age(); | |
| 4826 } else { | |
| 4827 m = m->incr_age(); | |
| 545 | 4828 obj->set_mark(m); |
| 526 | 4829 } |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4830 age_table()->add(obj, word_sz); |
| 545 | 4831 } else { |
| 4832 obj->set_mark(m); | |
| 526 | 4833 } |
| 4834 | |
| 17764 | 4835 if (G1StringDedup::is_enabled()) { |
| 4836 G1StringDedup::enqueue_from_evacuation(from_region->is_young(), | |
| 4837 to_region->is_young(), | |
| 4838 queue_num(), | |
| 4839 obj); | |
| 4840 } | |
| 4841 | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4842 size_t* surv_young_words = surviving_young_words(); |
| 342 | 4843 surv_young_words[young_index] += word_sz; |
| 4844 | |
| 4845 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
|
4846 // 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
|
4847 // 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
|
4848 // 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
|
4849 arrayOop(obj)->set_length(0); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4850 oop* old_p = set_partial_array_mask(old); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4851 push_on_queue(old_p); |
| 342 | 4852 } else { |
| 526 | 4853 // No point in using the slower heap_region_containing() method, |
| 4854 // given that we know obj is in the heap. | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4855 _scanner.set_region(_g1h->heap_region_containing_raw(obj)); |
| 5987 | 4856 obj->oop_iterate_backwards(&_scanner); |
| 342 | 4857 } |
| 4858 } else { | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4859 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
| 342 | 4860 obj = forward_ptr; |
| 4861 } | |
| 4862 return obj; | |
| 4863 } | |
| 4864 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4865 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4866 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
|
4867 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
|
4868 _scanned_klass->record_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4869 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4870 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4871 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4872 template <G1Barrier barrier, bool do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4873 template <class T> |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4874 void G1ParCopyClosure<barrier, do_mark_object>::do_oop_work(T* p) { |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4875 T heap_oop = oopDesc::load_heap_oop(p); |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4876 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4877 if (oopDesc::is_null(heap_oop)) { |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4878 return; |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4879 } |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4880 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4881 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4882 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4883 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4884 |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4885 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
|
4886 oop forwardee; |
| 526 | 4887 if (obj->is_forwarded()) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4888 forwardee = obj->forwardee(); |
| 526 | 4889 } else { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4890 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
| 342 | 4891 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4892 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
|
4893 oopDesc::encode_store_heap_oop(p, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4894 if (do_mark_object && forwardee != obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4895 // 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
|
4896 // 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
|
4897 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4898 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4899 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4900 if (barrier == G1BarrierKlass) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4901 do_klass_barrier(p, forwardee); |
| 342 | 4902 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4903 } else { |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4904 // 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
|
4905 // 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
|
4906 // be true) then attempt to mark the object. |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4907 if (do_mark_object) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4908 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4909 } |
| 526 | 4910 } |
| 4911 | |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4912 if (barrier == G1BarrierEvac) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4913 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4914 } |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4915 } |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4916 |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4917 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(oop* p); |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4918 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
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|
4919 |
| 342 | 4920 class G1ParEvacuateFollowersClosure : public VoidClosure { |
| 4921 protected: | |
| 4922 G1CollectedHeap* _g1h; | |
| 4923 G1ParScanThreadState* _par_scan_state; | |
| 4924 RefToScanQueueSet* _queues; | |
| 4925 ParallelTaskTerminator* _terminator; | |
| 4926 | |
| 4927 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4928 RefToScanQueueSet* queues() { return _queues; } | |
| 4929 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4930 | |
| 4931 public: | |
| 4932 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4933 G1ParScanThreadState* par_scan_state, | |
| 4934 RefToScanQueueSet* queues, | |
| 4935 ParallelTaskTerminator* terminator) | |
| 4936 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4937 _queues(queues), _terminator(terminator) {} | |
| 4938 | |
|
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|
4939 void do_void(); |
|
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4940 |
|
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4941 private: |
|
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4942 inline bool offer_termination(); |
|
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|
4943 }; |
|
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|
4944 |
|
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|
4945 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
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|
4946 G1ParScanThreadState* const pss = par_scan_state(); |
|
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4947 pss->start_term_time(); |
|
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4948 const bool res = terminator()->offer_termination(); |
|
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4949 pss->end_term_time(); |
|
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4950 return res; |
|
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|
4951 } |
|
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4952 |
|
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4953 void G1ParEvacuateFollowersClosure::do_void() { |
|
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4954 StarTask stolen_task; |
|
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4955 G1ParScanThreadState* const pss = par_scan_state(); |
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4956 pss->trim_queue(); |
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4957 |
|
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|
4958 do { |
|
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4959 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
|
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|
4960 assert(pss->verify_task(stolen_task), "sanity"); |
|
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4961 if (stolen_task.is_narrow()) { |
|
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|
4962 pss->deal_with_reference((narrowOop*) stolen_task); |
|
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4963 } else { |
|
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4964 pss->deal_with_reference((oop*) stolen_task); |
|
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4965 } |
|
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4966 |
|
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4967 // We've just processed a reference and we might have made |
|
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4968 // available new entries on the queues. So we have to make sure |
|
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|
4969 // we drain the queues as necessary. |
| 342 | 4970 pss->trim_queue(); |
| 4971 } | |
|
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|
4972 } while (!offer_termination()); |
|
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|
4973 |
|
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|
4974 pss->retire_alloc_buffers(); |
|
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|
4975 } |
| 342 | 4976 |
|
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4977 class G1KlassScanClosure : public KlassClosure { |
|
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4978 G1ParCopyHelper* _closure; |
|
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4979 bool _process_only_dirty; |
|
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4980 int _count; |
|
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4981 public: |
|
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4982 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
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4983 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
|
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4984 void do_klass(Klass* klass) { |
|
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4985 // If the klass has not been dirtied we know that there's |
|
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4986 // no references into the young gen and we can skip it. |
|
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4987 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
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4988 // Clean the klass since we're going to scavenge all the metadata. |
|
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4989 klass->clear_modified_oops(); |
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4990 |
|
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4991 // Tell the closure that this klass is the Klass to scavenge |
|
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4992 // and is the one to dirty if oops are left pointing into the young gen. |
|
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4993 _closure->set_scanned_klass(klass); |
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4994 |
|
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4995 klass->oops_do(_closure); |
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4996 |
|
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|
4997 _closure->set_scanned_klass(NULL); |
|
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4998 } |
|
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|
4999 _count++; |
|
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|
5000 } |
|
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|
5001 }; |
|
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|
5002 |
| 342 | 5003 class G1ParTask : public AbstractGangTask { |
| 5004 protected: | |
| 5005 G1CollectedHeap* _g1h; | |
| 5006 RefToScanQueueSet *_queues; | |
| 5007 ParallelTaskTerminator _terminator; | |
|
4728
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|
5008 uint _n_workers; |
| 342 | 5009 |
| 5010 Mutex _stats_lock; | |
| 5011 Mutex* stats_lock() { return &_stats_lock; } | |
| 5012 | |
| 5013 size_t getNCards() { | |
| 5014 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 5015 / G1BlockOffsetSharedArray::N_bytes; | |
| 5016 } | |
| 5017 | |
| 5018 public: | |
|
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|
5019 G1ParTask(G1CollectedHeap* g1h, |
|
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|
5020 RefToScanQueueSet *task_queues) |
| 342 | 5021 : AbstractGangTask("G1 collection"), |
| 5022 _g1h(g1h), | |
| 5023 _queues(task_queues), | |
|
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|
5024 _terminator(0, _queues), |
|
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|
5025 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 5026 {} |
| 5027 | |
| 5028 RefToScanQueueSet* queues() { return _queues; } | |
| 5029 | |
| 5030 RefToScanQueue *work_queue(int i) { | |
| 5031 return queues()->queue(i); | |
| 5032 } | |
| 5033 | |
|
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|
5034 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
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|
5035 |
|
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|
5036 virtual void set_for_termination(int active_workers) { |
|
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|
5037 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
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|
5038 // in the young space (_par_seq_tasks) in the G1 heap |
|
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|
5039 // for SequentialSubTasksDone. |
|
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|
5040 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
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|
5041 // both of which need setting by set_n_termination(). |
|
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|
5042 _g1h->SharedHeap::set_n_termination(active_workers); |
|
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|
5043 _g1h->set_n_termination(active_workers); |
|
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|
5044 terminator()->reset_for_reuse(active_workers); |
|
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|
5045 _n_workers = active_workers; |
|
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|
5046 } |
|
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|
5047 |
|
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|
5048 void work(uint worker_id) { |
|
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|
5049 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 5050 |
| 5051 double start_time_ms = os::elapsedTime() * 1000.0; | |
|
6219
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|
5052 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 5053 |
|
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|
5054 { |
|
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|
5055 ResourceMark rm; |
|
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|
5056 HandleMark hm; |
|
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|
5057 |
|
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|
5058 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
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|
5059 |
|
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|
5060 G1ParScanThreadState pss(_g1h, worker_id, rp); |
|
5986
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|
5061 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
17759
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|
5062 |
|
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|
5063 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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|
5064 |
|
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|
5065 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
|
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|
5066 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
|
5986
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|
5067 |
|
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|
5068 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
|
6725
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|
5069 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
|
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|
5070 |
|
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|
5071 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
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|
5072 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
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|
5073 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5074 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5075 OopClosure* scan_root_cl = &only_scan_root_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
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changeset
|
5076 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5077 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5078 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5079 // We also need to mark copied objects. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5080 scan_root_cl = &scan_mark_root_cl; |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
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changeset
|
5081 scan_klasses_cl = &scan_mark_klasses_cl_s; |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5082 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5083 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5084 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5085 |
| 12080 | 5086 // Don't scan the scavengable methods in the code cache as part |
| 5087 // of strong root scanning. The code roots that point into a | |
| 5088 // region in the collection set are scanned when we scan the | |
| 5089 // region's RSet. | |
| 5090 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; | |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5091 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5092 pss.start_strong_roots(); |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5093 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5094 SharedHeap::ScanningOption(so), |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5095 scan_root_cl, |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5096 &push_heap_rs_cl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
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changeset
|
5097 scan_klasses_cl, |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5098 worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5099 pss.end_strong_roots(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5100 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5101 { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5102 double start = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5103 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5104 evac.do_void(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5105 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5106 double term_ms = pss.term_time()*1000.0; |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5107 _g1h->g1_policy()->phase_times()->add_obj_copy_time(worker_id, elapsed_ms-term_ms); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5108 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5109 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5110 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5111 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5112 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5113 if (ParallelGCVerbose) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5114 MutexLocker x(stats_lock()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5115 pss.print_termination_stats(worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5116 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5117 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5118 assert(pss.refs()->is_empty(), "should be empty"); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5119 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5120 // Close the inner scope so that the ResourceMark and HandleMark |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5121 // 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
|
5122 // "GC Worker Time". |
| 342 | 5123 } |
| 5124 | |
| 1611 | 5125 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
|
5126 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 5127 } |
| 5128 }; | |
| 5129 | |
| 5130 // *** Common G1 Evacuation Stuff | |
| 5131 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5132 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5133 |
| 342 | 5134 void |
| 5135 G1CollectedHeap:: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5136 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
|
5137 ScanningOption so, |
| 342 | 5138 OopClosure* scan_non_heap_roots, |
| 5139 OopsInHeapRegionClosure* scan_rs, | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5140 G1KlassScanClosure* scan_klasses, |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
5141 uint worker_i) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5142 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5143 // First scan the strong roots |
| 342 | 5144 double ext_roots_start = os::elapsedTime(); |
| 5145 double closure_app_time_sec = 0.0; | |
| 5146 | |
| 5147 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
| 5148 | |
| 12080 | 5149 assert(so & SO_CodeCache || scan_rs != NULL, "must scan code roots somehow"); |
| 5150 // Walk the code cache/strong code roots w/o buffering, because StarTask | |
| 5151 // cannot handle unaligned oop locations. | |
| 5152 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
|
5153 |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5154 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
|
5155 is_scavenging, so, |
| 342 | 5156 &buf_scan_non_heap_roots, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5157 &eager_scan_code_roots, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5158 scan_klasses |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5159 ); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5160 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5161 // 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
|
5162 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
|
5163 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5164 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5165 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5166 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5167 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
|
5168 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5169 |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5170 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 5171 buf_scan_non_heap_roots.done(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5172 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5173 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
|
5174 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5175 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
|
5176 |
| 342 | 5177 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
|
5178 ((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
|
5179 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5180 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 5181 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5182 // 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
|
5183 // 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
|
5184 // 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
|
5185 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5186 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
|
5187 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
|
5188 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
|
5189 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5190 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
|
5191 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5192 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
|
5193 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5194 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5195 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 5196 |
| 12080 | 5197 // If this is an initial mark pause, and we're not scanning |
| 5198 // the entire code cache, we need to mark the oops in the | |
| 5199 // strong code root lists for the regions that are not in | |
| 5200 // the collection set. | |
| 5201 // Note all threads participate in this set of root tasks. | |
| 5202 double mark_strong_code_roots_ms = 0.0; | |
| 5203 if (g1_policy()->during_initial_mark_pause() && !(so & SO_CodeCache)) { | |
| 5204 double mark_strong_roots_start = os::elapsedTime(); | |
| 5205 mark_strong_code_roots(worker_i); | |
| 5206 mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; | |
| 5207 } | |
| 5208 g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); | |
| 5209 | |
| 342 | 5210 // Now scan the complement of the collection set. |
| 5211 if (scan_rs != NULL) { | |
| 12080 | 5212 g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
| 342 | 5213 } |
| 5214 _process_strong_tasks->all_tasks_completed(); | |
| 5215 } | |
| 5216 | |
| 5217 void | |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5218 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
|
5219 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5220 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
| 342 | 5221 } |
| 5222 | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5223 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
|
5a32d2a3cc1e
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|
5224 private: |
|
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|
5225 BoolObjectClosure* _is_alive; |
|
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|
5226 int _initial_string_table_size; |
|
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|
5227 int _initial_symbol_table_size; |
|
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|
5228 |
|
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|
5229 bool _process_strings; |
|
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|
5230 int _strings_processed; |
|
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|
5231 int _strings_removed; |
|
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|
5232 |
|
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|
5233 bool _process_symbols; |
|
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|
5234 int _symbols_processed; |
|
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|
5235 int _symbols_removed; |
|
17652
0eb64cfc0b76
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|
5236 |
|
0eb64cfc0b76
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|
5237 bool _do_in_parallel; |
|
17634
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|
5238 public: |
|
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|
5239 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
|
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|
5240 AbstractGangTask("Par String/Symbol table unlink"), _is_alive(is_alive), |
|
17652
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|
5241 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
|
17634
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5242 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
|
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|
5243 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
|
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|
5244 |
|
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|
5245 _initial_string_table_size = StringTable::the_table()->table_size(); |
|
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|
5246 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
|
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|
5247 if (process_strings) { |
|
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|
5248 StringTable::clear_parallel_claimed_index(); |
|
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|
5249 } |
|
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|
5250 if (process_symbols) { |
|
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|
5251 SymbolTable::clear_parallel_claimed_index(); |
|
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|
5252 } |
|
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|
5253 } |
|
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|
5254 |
|
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|
5255 ~G1StringSymbolTableUnlinkTask() { |
|
17652
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|
5256 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
|
17634
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|
5257 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
|
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|
5258 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
|
17652
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|
5259 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
|
17634
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|
5260 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
|
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|
5261 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
|
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|
5262 } |
|
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|
5263 |
|
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|
5264 void work(uint worker_id) { |
|
17652
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|
5265 if (_do_in_parallel) { |
|
17634
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|
5266 int strings_processed = 0; |
|
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changeset
|
5267 int strings_removed = 0; |
|
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|
5268 int symbols_processed = 0; |
|
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changeset
|
5269 int symbols_removed = 0; |
|
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|
5270 if (_process_strings) { |
|
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changeset
|
5271 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
|
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|
5272 Atomic::add(strings_processed, &_strings_processed); |
|
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|
5273 Atomic::add(strings_removed, &_strings_removed); |
|
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|
5274 } |
|
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|
5275 if (_process_symbols) { |
|
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|
5276 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
|
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|
5277 Atomic::add(symbols_processed, &_symbols_processed); |
|
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|
5278 Atomic::add(symbols_removed, &_symbols_removed); |
|
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|
5279 } |
|
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|
5280 } else { |
|
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|
5281 if (_process_strings) { |
|
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changeset
|
5282 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
|
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|
5283 } |
|
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|
5284 if (_process_symbols) { |
|
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changeset
|
5285 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
|
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|
5286 } |
|
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changeset
|
5287 } |
|
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diff
changeset
|
5288 } |
|
5a32d2a3cc1e
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diff
changeset
|
5289 |
|
5a32d2a3cc1e
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changeset
|
5290 size_t strings_processed() const { return (size_t)_strings_processed; } |
|
5a32d2a3cc1e
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|
5291 size_t strings_removed() const { return (size_t)_strings_removed; } |
|
5a32d2a3cc1e
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|
5292 |
|
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changeset
|
5293 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
|
5a32d2a3cc1e
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|
5294 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
|
5a32d2a3cc1e
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|
5295 }; |
|
5a32d2a3cc1e
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diff
changeset
|
5296 |
|
5a32d2a3cc1e
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changeset
|
5297 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
|
5a32d2a3cc1e
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|
5298 bool process_strings, bool process_symbols) { |
|
5a32d2a3cc1e
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changeset
|
5299 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
5a32d2a3cc1e
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changeset
|
5300 _g1h->workers()->active_workers() : 1); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5301 |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5302 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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changeset
|
5303 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
5a32d2a3cc1e
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tschatzl
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changeset
|
5304 set_par_threads(n_workers); |
|
5a32d2a3cc1e
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diff
changeset
|
5305 workers()->run_task(&g1_unlink_task); |
|
5a32d2a3cc1e
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tschatzl
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changeset
|
5306 set_par_threads(0); |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5307 } else { |
|
5a32d2a3cc1e
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changeset
|
5308 g1_unlink_task.work(0); |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5309 } |
|
5a32d2a3cc1e
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changeset
|
5310 if (G1TraceStringSymbolTableScrubbing) { |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5311 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
|
5a32d2a3cc1e
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changeset
|
5312 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
|
5a32d2a3cc1e
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changeset
|
5313 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
|
5a32d2a3cc1e
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|
5314 g1_unlink_task.strings_processed(), g1_unlink_task.strings_removed(), |
|
5a32d2a3cc1e
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tschatzl
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|
5315 g1_unlink_task.symbols_processed(), g1_unlink_task.symbols_removed()); |
|
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|
5316 } |
| 17764 | 5317 |
| 5318 if (G1StringDedup::is_enabled()) { | |
| 5319 G1StringDedup::unlink(is_alive); | |
| 5320 } | |
|
17634
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changeset
|
5321 } |
|
5a32d2a3cc1e
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changeset
|
5322 |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
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diff
changeset
|
5323 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
|
a07bea31ef35
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changeset
|
5324 public: |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
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17833
diff
changeset
|
5325 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
|
17756
a07bea31ef35
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tschatzl
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diff
changeset
|
5326 *card_ptr = CardTableModRefBS::dirty_card_val(); |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5327 return true; |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5328 } |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5329 }; |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5330 |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5331 void G1CollectedHeap::redirty_logged_cards() { |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5332 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5333 double redirty_logged_cards_start = os::elapsedTime(); |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5334 |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5335 RedirtyLoggedCardTableEntryFastClosure redirty; |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5336 dirty_card_queue_set().set_closure(&redirty); |
|
a07bea31ef35
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changeset
|
5337 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5338 |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5339 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
|
a07bea31ef35
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tschatzl
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changeset
|
5340 dcq.merge_bufferlists(&dirty_card_queue_set()); |
|
a07bea31ef35
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tschatzl
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changeset
|
5341 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5342 |
|
a07bea31ef35
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changeset
|
5343 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5344 } |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5345 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5346 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5348 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5349 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5350 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5354 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5355 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5356 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5357 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5358 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5359 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5360 return false; |
|
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 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5363 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5364 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5365 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5366 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5367 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5368 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5369 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5372 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5373 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5374 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5375 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 void do_oop( oop* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5377 oop obj = *p; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5378 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5379 if (_g1->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5380 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5381 *p = obj->forwardee(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5382 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5383 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5385 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5386 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5387 // serial and parallel code as long as different worker |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5388 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5391 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 OopClosure* _copy_non_heap_obj_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5394 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5396 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5399 OopClosure* non_heap_obj_cl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5400 OopsInHeapRegionClosure* metadata_obj_cl, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 G1ParScanThreadState* pss): |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5402 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5403 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5404 _copy_metadata_obj_cl(metadata_obj_cl), |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5405 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5406 {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5407 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5408 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5409 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5410 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5411 template <class T> void do_oop_work(T* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5412 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5413 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5414 if (_g1h->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5415 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5416 // to a new location or to itself in the event of an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5417 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5418 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5419 // heap, update the RSet for the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5420 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5421 // If the referent has not been forwarded then we have to keep |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5422 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5424 // If the reference field is in the G1 heap then we can push |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5425 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5426 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5427 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5428 // new location, and the RSet updated. Otherwise we need to |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5429 // use the the non-heap or metadata closures directly to copy |
| 10405 | 5430 // the referent object and update the pointer, while avoiding |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5431 // updating the RSet. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5432 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5433 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5434 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5435 } else { |
|
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17866
diff
changeset
|
5436 assert(!Metaspace::contains((const void*)p), |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5437 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5438 PTR_FORMAT, p)); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5439 _copy_non_heap_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5440 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5442 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5443 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5444 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 // closure for each discovered list in some of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 // reference processing phases. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5448 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5450 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5451 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5452 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5453 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5455 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5456 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5457 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5458 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5459 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5460 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5461 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5462 void do_void() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5463 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5464 pss->trim_queue(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5465 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5466 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5467 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5468 // Parallel Reference Processing closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5469 |
|
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|
5470 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
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|
5471 // processing during G1 evacuation pauses. |
|
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changeset
|
5472 |
|
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|
5473 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
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|
5474 private: |
|
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|
5475 G1CollectedHeap* _g1h; |
|
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|
5476 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
5477 FlexibleWorkGang* _workers; |
|
3979
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|
5478 int _active_workers; |
|
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changeset
|
5479 |
|
4dfb2df418f2
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|
5480 public: |
|
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|
5481 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
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|
5482 FlexibleWorkGang* workers, |
|
3979
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|
5483 RefToScanQueueSet *task_queues, |
|
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|
5484 int n_workers) : |
|
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diff
changeset
|
5485 _g1h(g1h), |
|
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diff
changeset
|
5486 _queues(task_queues), |
|
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diff
changeset
|
5487 _workers(workers), |
|
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|
5488 _active_workers(n_workers) |
|
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changeset
|
5489 { |
|
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changeset
|
5490 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
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|
5491 } |
|
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|
5492 |
|
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|
5493 // Executes the given task using concurrent marking worker threads. |
|
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|
5494 virtual void execute(ProcessTask& task); |
|
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changeset
|
5495 virtual void execute(EnqueueTask& task); |
|
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|
5496 }; |
|
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changeset
|
5497 |
|
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|
5498 // Gang task for possibly parallel reference processing |
|
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changeset
|
5499 |
|
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|
5500 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
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|
5501 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
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|
5502 ProcessTask& _proc_task; |
|
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|
5503 G1CollectedHeap* _g1h; |
|
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|
5504 RefToScanQueueSet *_task_queues; |
|
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|
5505 ParallelTaskTerminator* _terminator; |
|
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changeset
|
5506 |
|
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changeset
|
5507 public: |
|
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|
5508 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
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|
5509 G1CollectedHeap* g1h, |
|
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|
5510 RefToScanQueueSet *task_queues, |
|
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|
5511 ParallelTaskTerminator* terminator) : |
|
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|
5512 AbstractGangTask("Process reference objects in parallel"), |
|
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|
5513 _proc_task(proc_task), |
|
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diff
changeset
|
5514 _g1h(g1h), |
|
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changeset
|
5515 _task_queues(task_queues), |
|
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|
5516 _terminator(terminator) |
|
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|
5517 {} |
|
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|
5518 |
|
4728
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|
5519 virtual void work(uint worker_id) { |
|
3979
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|
5520 // The reference processing task executed by a single worker. |
|
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|
5521 ResourceMark rm; |
|
4dfb2df418f2
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diff
changeset
|
5522 HandleMark hm; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5523 |
|
4dfb2df418f2
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diff
changeset
|
5524 G1STWIsAliveClosure is_alive(_g1h); |
|
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changeset
|
5525 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5526 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
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changeset
|
5527 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5528 |
|
3979
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diff
changeset
|
5529 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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diff
changeset
|
5530 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5531 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
5532 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
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changeset
|
5533 |
|
4dfb2df418f2
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diff
changeset
|
5534 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
5535 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
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|
5536 |
|
4dfb2df418f2
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diff
changeset
|
5537 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
5538 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
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diff
changeset
|
5539 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5540 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
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parents:
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diff
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|
5541 // We also need to mark copied objects. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5542 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
|
5543 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
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parents:
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diff
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|
5544 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5545 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5546 // Keep alive closure. |
|
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
5547 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
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diff
changeset
|
5548 |
|
4dfb2df418f2
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diff
changeset
|
5549 // Complete GC closure |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5550 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
4dfb2df418f2
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diff
changeset
|
5551 |
|
4dfb2df418f2
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diff
changeset
|
5552 // Call the reference processing task's work routine. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5553 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
4dfb2df418f2
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diff
changeset
|
5554 |
|
4dfb2df418f2
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diff
changeset
|
5555 // Note we cannot assert that the refs array is empty here as not all |
|
4dfb2df418f2
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diff
changeset
|
5556 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
4dfb2df418f2
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diff
changeset
|
5557 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5558 // the queue may not be empty. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5559 } |
|
4dfb2df418f2
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diff
changeset
|
5560 }; |
|
4dfb2df418f2
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3973
diff
changeset
|
5561 |
|
4dfb2df418f2
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diff
changeset
|
5562 // Driver routine for parallel reference processing. |
|
4dfb2df418f2
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diff
changeset
|
5563 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
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diff
changeset
|
5564 // task and has the worker threads execute it. |
|
4dfb2df418f2
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diff
changeset
|
5565 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
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diff
changeset
|
5566 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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diff
changeset
|
5567 |
|
4dfb2df418f2
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diff
changeset
|
5568 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
4dfb2df418f2
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diff
changeset
|
5569 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
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diff
changeset
|
5570 |
|
4dfb2df418f2
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diff
changeset
|
5571 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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diff
changeset
|
5572 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
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diff
changeset
|
5573 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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diff
changeset
|
5574 } |
|
4dfb2df418f2
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diff
changeset
|
5575 |
|
4dfb2df418f2
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diff
changeset
|
5576 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5577 |
|
4dfb2df418f2
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diff
changeset
|
5578 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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diff
changeset
|
5579 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
4dfb2df418f2
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diff
changeset
|
5580 EnqueueTask& _enq_task; |
|
4dfb2df418f2
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diff
changeset
|
5581 |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5582 public: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5583 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
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diff
changeset
|
5584 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
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diff
changeset
|
5585 _enq_task(enq_task) |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5586 { } |
|
4dfb2df418f2
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3973
diff
changeset
|
5587 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5588 virtual void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5589 _enq_task.work(worker_id); |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5590 } |
|
4dfb2df418f2
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diff
changeset
|
5591 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5592 |
| 10405 | 5593 // Driver routine for parallel reference enqueueing. |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5594 // Creates an instance of the ref enqueueing gang |
|
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|
5595 // task and has the worker threads execute it. |
|
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changeset
|
5596 |
|
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parents:
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diff
changeset
|
5597 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
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|
5598 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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parents:
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changeset
|
5599 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5600 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
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parents:
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|
5601 |
|
4dfb2df418f2
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diff
changeset
|
5602 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
5603 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
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parents:
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changeset
|
5604 _g1h->set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5605 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5606 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5607 // End of weak reference support closures |
|
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parents:
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diff
changeset
|
5608 |
|
4dfb2df418f2
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diff
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|
5609 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
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|
5610 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
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parents:
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|
5611 // objects discovered by the CM ref processor. |
|
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diff
changeset
|
5612 |
|
4dfb2df418f2
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|
5613 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
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parents:
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|
5614 protected: |
|
4dfb2df418f2
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|
5615 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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|
5616 RefToScanQueueSet *_queues; |
|
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|
5617 ParallelTaskTerminator _terminator; |
|
4728
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7121618: Change type of number of GC workers to unsigned int.
jmasa
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|
5618 uint _n_workers; |
|
3979
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|
5619 |
|
4dfb2df418f2
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|
5620 public: |
|
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|
5621 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
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|
5622 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
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|
5623 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5624 _queues(task_queues), |
|
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|
5625 _terminator(workers, _queues), |
|
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changeset
|
5626 _n_workers(workers) |
|
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parents:
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|
5627 { } |
|
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parents:
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|
5628 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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diff
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|
5629 void work(uint worker_id) { |
|
3979
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parents:
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diff
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|
5630 ResourceMark rm; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5631 HandleMark hm; |
|
4dfb2df418f2
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parents:
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changeset
|
5632 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5633 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
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parents:
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|
5634 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5635 |
|
3979
4dfb2df418f2
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parents:
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|
5636 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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parents:
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changeset
|
5637 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5638 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
|
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parents:
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|
5639 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5640 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5641 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
|
5642 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
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parents:
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changeset
|
5643 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5644 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
|
5645 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
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6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5646 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5647 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
|
5648 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
|
5649 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5650 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5651 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5652 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
|
5653 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5654 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5655 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5656 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5657 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5658 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5659 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5660 // to be copied. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5661 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5662 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5663 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5665 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
|
5666 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5667 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5668 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5669 // So this must be true - but assert just in case someone decides to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5671 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5672 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5673 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5674 // Select discovered lists [i, i+stride, i+2*stride,...,limit) |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5675 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5676 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5677 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5678 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5679 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5680 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5681 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5682 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5683 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5684 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5685 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5686 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5687 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5688 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5689 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5690 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5691 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5693 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5694 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5695 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5696 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5697 assert(pss.refs()->is_empty(), "should be"); |
|
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 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5700 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5701 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5702 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 double ref_proc_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 // 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
|
5710 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5711 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5712 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5713 // 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
|
5714 // 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
|
5715 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5716 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5717 // but would not have treated the reference object as a regular oop. |
| 10405 | 5718 // As a result the copy closure would not have been applied to the |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5719 // referent object. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5720 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5721 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5722 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5723 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5724 // We also need to do this copying before we process the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5725 // objects discovered by the STW ref processor in case one of these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5726 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5727 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5728 |
| 4711 | 5729 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5730 no_of_gc_workers == workers()->active_workers(), |
| 5731 "Need to reset active GC workers"); | |
| 5732 | |
| 5733 set_par_threads(no_of_gc_workers); | |
| 5734 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5735 no_of_gc_workers, | |
| 5736 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5737 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5738 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5739 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5740 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5741 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5743 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5744 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5745 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5746 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5747 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5748 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5749 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5750 // of JNI refs is serial and performed serially by the current thread |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5751 // 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
|
5752 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5753 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5754 // Use only a single queue for this PSS. |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5755 G1ParScanThreadState pss(this, 0, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5756 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5757 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5758 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5759 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5760 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5761 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5762 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5763 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5764 assert(pss.refs()->is_empty(), "pre-condition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5765 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5766 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
|
5767 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5768 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5769 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
|
5770 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5771 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5772 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
|
5773 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5774 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5775 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5776 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5777 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
|
5778 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5779 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5780 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5781 // Keep alive closure. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5782 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
|
5783 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5784 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5785 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5786 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5787 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5788 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5789 |
| 10405 | 5790 ReferenceProcessorStats stats; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5791 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5792 // Serial reference processing... |
| 10405 | 5793 stats = rp->process_discovered_references(&is_alive, |
| 5794 &keep_alive, | |
| 5795 &drain_queue, | |
| 5796 NULL, | |
| 5797 _gc_timer_stw); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5798 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5799 // Parallel reference processing |
| 6819 | 5800 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5801 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5802 | |
| 5803 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
| 10405 | 5804 stats = rp->process_discovered_references(&is_alive, |
| 5805 &keep_alive, | |
| 5806 &drain_queue, | |
| 5807 &par_task_executor, | |
| 5808 _gc_timer_stw); | |
| 5809 } | |
| 5810 | |
| 5811 _gc_tracer_stw->report_gc_reference_stats(stats); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5812 // We have completed copying any necessary live referent objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5813 // (that were not copied during the actual pause) so we can |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5814 // retire any active alloc buffers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5815 pss.retire_alloc_buffers(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5816 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
|
5817 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5818 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
|
5819 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
|
5820 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5821 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5822 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5823 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5824 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5825 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5826 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5827 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
|
5828 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5829 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5830 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5831 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5832 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5833 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5834 } else { |
| 10405 | 5835 // Parallel reference enqueueing |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5836 |
| 6819 | 5837 assert(no_of_gc_workers == workers()->active_workers(), |
| 5838 "Need to reset active workers"); | |
| 5839 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5840 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5841 | |
| 5842 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
|
5843 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5844 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5845 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5846 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5847 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5848 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5849 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5850 // 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
|
5851 // Should we do that here also? We could, but it is a serial operation |
| 10405 | 5852 // and could significantly increase the pause time. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5853 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5854 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
|
5855 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
|
5856 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5857 |
| 10405 | 5858 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
|
5859 _expand_heap_after_alloc_failure = true; |
| 10405 | 5860 _evacuation_failed = false; |
| 342 | 5861 |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5862 // 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
|
5863 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
|
5864 |
| 342 | 5865 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
|
5866 |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5867 // Disable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5868 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
|
5869 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
|
5870 hot_card_cache->set_use_cache(false); |
| 889 | 5871 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5872 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5873 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5874 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5875 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5876 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5877 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5878 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5879 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5880 "If not dynamic should be using all the workers"); |
| 4711 | 5881 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5882 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5883 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5884 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5885 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5886 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5887 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5888 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5889 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5890 |
| 5891 init_for_evac_failure(NULL); | |
| 5892 | |
| 5893 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
|
5894 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5895 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
|
5896 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5897 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5898 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5899 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5900 StrongRootsScope srs(this); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5901 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5902 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5903 // 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
|
5904 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5905 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5906 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5907 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5908 "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
|
5909 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5910 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5911 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
|
5912 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5913 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5914 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5915 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5916 // 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
|
5917 // 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
|
5918 // 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
|
5919 // 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
|
5920 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5921 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5922 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5923 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
|
5924 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
|
5925 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5926 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5927 (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
|
5928 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
|
5929 |
| 342 | 5930 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5931 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5932 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5933 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5934 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5935 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5936 // not copied during the pause. |
| 6819 | 5937 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5938 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5939 // Weak root processing. |
| 342 | 5940 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5941 G1STWIsAliveClosure is_alive(this); |
| 342 | 5942 G1KeepAliveClosure keep_alive(this); |
| 5943 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 17764 | 5944 if (G1StringDedup::is_enabled()) { |
| 5945 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
| 5946 } | |
| 342 | 5947 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5948 |
| 10405 | 5949 release_gc_alloc_regions(n_workers, evacuation_info); |
| 342 | 5950 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
|
5951 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5952 // 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
|
5953 // 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
|
5954 // 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
|
5955 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
|
5956 hot_card_cache->set_use_cache(true); |
| 342 | 5957 |
| 12080 | 5958 // Migrate the strong code roots attached to each region in |
| 5959 // the collection set. Ideally we would like to do this | |
| 5960 // after we have finished the scanning/evacuation of the | |
| 5961 // strong code roots for a particular heap region. | |
| 5962 migrate_strong_code_roots(); | |
| 5963 | |
|
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5964 purge_code_root_memory(); |
|
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5965 |
| 12080 | 5966 if (g1_policy()->during_initial_mark_pause()) { |
| 5967 // Reset the claim values set during marking the strong code roots | |
| 5968 reset_heap_region_claim_values(); | |
| 5969 } | |
| 5970 | |
| 342 | 5971 finalize_for_evac_failure(); |
| 5972 | |
| 5973 if (evacuation_failed()) { | |
| 5974 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5975 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5976 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5977 // 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
|
5978 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5979 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 5980 } |
| 5981 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5982 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5983 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5984 // this after the card table is cleaned (and verified) as |
| 10405 | 5985 // the act of enqueueing entries on to the pending list |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5986 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5987 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5988 // RSets. |
| 6819 | 5989 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5990 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5991 if (G1DeferredRSUpdate) { |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5992 redirty_logged_cards(); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5993 } |
| 342 | 5994 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5995 } | |
| 5996 | |
| 2152 | 5997 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5998 FreeRegionList* free_list, | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5999 bool par, |
|
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6000 bool locked) { |
| 2152 | 6001 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
| 6002 assert(!hr->is_empty(), "the region should not be empty"); | |
| 6003 assert(free_list != NULL, "pre-condition"); | |
| 6004 | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6005 // 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
|
6006 // 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
|
6007 // (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
|
6008 if (!hr->is_young()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6009 _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
|
6010 } |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6011 hr->hr_clear(par, true /* clear_space */, locked /* locked */); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6012 free_list->add_ordered(hr); |
| 2152 | 6013 } |
| 6014 | |
| 6015 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 6016 FreeRegionList* free_list, | |
| 6017 bool par) { | |
| 6018 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 6019 assert(free_list != NULL, "pre-condition"); | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6020 |
| 2152 | 6021 size_t hr_capacity = hr->capacity(); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6022 // 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
|
6023 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6024 uint last_index = hr->last_hc_index(); |
| 2152 | 6025 hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6026 free_region(hr, free_list, par); |
| 2152 | 6027 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6028 uint i = hr->hrs_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6029 while (i < last_index) { |
| 3766 | 6030 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6031 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 6032 curr_hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6033 free_region(curr_hr, free_list, par); |
| 2152 | 6034 i += 1; |
| 6035 } | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6036 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6037 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6038 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6039 const HeapRegionSetCount& humongous_regions_removed) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6040 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6041 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6042 _old_set.bulk_remove(old_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6043 _humongous_set.bulk_remove(humongous_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6044 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6045 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6046 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6047 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6048 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6049 assert(list != NULL, "list can't be null"); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6050 if (!list->is_empty()) { |
| 2152 | 6051 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6052 _free_list.add_ordered(list); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6053 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6054 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6055 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6056 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6057 assert(_summary_bytes_used >= bytes, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6058 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" should be >= bytes: "SIZE_FORMAT, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6059 _summary_bytes_used, bytes)); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6060 _summary_bytes_used -= bytes; |
| 342 | 6061 } |
| 6062 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6063 class G1ParCleanupCTTask : public AbstractGangTask { |
| 12343 | 6064 G1SATBCardTableModRefBS* _ct_bs; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6065 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6066 HeapRegion* volatile _su_head; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6067 public: |
| 12343 | 6068 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6069 G1CollectedHeap* g1h) : |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6070 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
|
6071 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6072 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6073 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6074 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6075 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6076 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6077 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6078 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6079 |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6080 void clear_cards(HeapRegion* r) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6081 // Cards of the survivors should have already been dirtied. |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6082 if (!r->is_survivor()) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6083 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6084 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6085 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6086 }; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6087 |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6088 #ifndef PRODUCT |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6089 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6090 G1CollectedHeap* _g1h; |
| 12343 | 6091 G1SATBCardTableModRefBS* _ct_bs; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6092 public: |
| 12343 | 6093 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, G1SATBCardTableModRefBS* ct_bs) |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6094 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6095 virtual bool doHeapRegion(HeapRegion* r) { |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6096 if (r->is_survivor()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6097 _g1h->verify_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6098 } else { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6099 _g1h->verify_not_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6100 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6101 return false; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6102 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6103 }; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6104 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6105 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6106 // All of the region should be clean. |
| 12343 | 6107 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6108 MemRegion mr(hr->bottom(), hr->end()); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6109 ct_bs->verify_not_dirty_region(mr); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6110 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6111 |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6112 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6113 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6114 // dirty allocated blocks as they allocate them. The thread that |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6115 // retires each region and replaces it with a new one will do a |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6116 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6117 // not dirty that area (one less thing to have to do while holding |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6118 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6119 // is dirty. |
| 12343 | 6120 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6121 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
|
12835
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6122 if (hr->is_young()) { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6123 ct_bs->verify_g1_young_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6124 } else { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6125 ct_bs->verify_dirty_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6126 } |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6127 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6128 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6129 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
| 12343 | 6130 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6131 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6132 verify_dirty_region(hr); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6133 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6134 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6135 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6136 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6137 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6138 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6139 #endif |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6140 |
| 342 | 6141 void G1CollectedHeap::cleanUpCardTable() { |
| 12343 | 6142 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 6143 double start = os::elapsedTime(); |
| 6144 | |
| 4023 | 6145 { |
| 6146 // Iterate over the dirty cards region list. | |
| 6147 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 6148 | |
| 4711 | 6149 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 6150 set_par_threads(); | |
| 4023 | 6151 workers()->run_task(&cleanup_task); |
| 6152 set_par_threads(0); | |
| 6153 } else { | |
| 6154 while (_dirty_cards_region_list) { | |
| 6155 HeapRegion* r = _dirty_cards_region_list; | |
| 6156 cleanup_task.clear_cards(r); | |
| 6157 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 6158 if (_dirty_cards_region_list == r) { | |
| 6159 // The last region. | |
| 6160 _dirty_cards_region_list = NULL; | |
| 6161 } | |
| 6162 r->set_next_dirty_cards_region(NULL); | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6163 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6164 } |
| 4023 | 6165 #ifndef PRODUCT |
| 6166 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 6167 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 6168 heap_region_iterate(&cleanup_verifier); | |
| 6169 } | |
| 6170 #endif | |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6171 } |
|
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|
6172 |
| 342 | 6173 double elapsed = os::elapsedTime() - start; |
|
6219
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|
6174 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 6175 } |
| 6176 | |
| 10405 | 6177 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
| 2152 | 6178 size_t pre_used = 0; |
| 6179 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 6180 | |
| 342 | 6181 double young_time_ms = 0.0; |
| 6182 double non_young_time_ms = 0.0; | |
| 6183 | |
|
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|
6184 // Since the collection set is a superset of the the young list, |
|
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|
6185 // all we need to do to clear the young list is clear its |
|
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6186 // head and length, and unlink any young regions in the code below |
|
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|
6187 _young_list->clear(); |
|
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|
6188 |
| 342 | 6189 G1CollectorPolicy* policy = g1_policy(); |
| 6190 | |
| 6191 double start_sec = os::elapsedTime(); | |
| 6192 bool non_young = true; | |
| 6193 | |
| 6194 HeapRegion* cur = cs_head; | |
| 6195 int age_bound = -1; | |
| 6196 size_t rs_lengths = 0; | |
| 6197 | |
| 6198 while (cur != NULL) { | |
| 2361 | 6199 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 6200 if (non_young) { |
| 6201 if (cur->is_young()) { | |
| 6202 double end_sec = os::elapsedTime(); | |
| 6203 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 6204 non_young_time_ms += elapsed_ms; | |
| 6205 | |
| 6206 start_sec = os::elapsedTime(); | |
| 6207 non_young = false; | |
| 6208 } | |
| 6209 } else { | |
|
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|
6210 if (!cur->is_young()) { |
|
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|
6211 double end_sec = os::elapsedTime(); |
|
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|
6212 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
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|
6213 young_time_ms += elapsed_ms; |
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|
6214 |
|
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|
6215 start_sec = os::elapsedTime(); |
|
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|
6216 non_young = true; |
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|
6217 } |
| 342 | 6218 } |
| 6219 | |
|
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|
6220 rs_lengths += cur->rem_set()->occupied_locked(); |
| 342 | 6221 |
| 6222 HeapRegion* next = cur->next_in_collection_set(); | |
| 6223 assert(cur->in_collection_set(), "bad CS"); | |
| 6224 cur->set_next_in_collection_set(NULL); | |
| 6225 cur->set_in_collection_set(false); | |
| 6226 | |
| 6227 if (cur->is_young()) { | |
| 6228 int index = cur->young_index_in_cset(); | |
|
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|
6229 assert(index != -1, "invariant"); |
|
6010
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|
6230 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 6231 size_t words_survived = _surviving_young_words[index]; |
| 6232 cur->record_surv_words_in_group(words_survived); | |
|
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|
6233 |
|
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|
6234 // At this point the we have 'popped' cur from the collection set |
|
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|
6235 // (linked via next_in_collection_set()) but it is still in the |
|
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|
6236 // young list (linked via next_young_region()). Clear the |
|
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|
6237 // _next_young_region field. |
|
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|
6238 cur->set_next_young_region(NULL); |
| 342 | 6239 } else { |
| 6240 int index = cur->young_index_in_cset(); | |
|
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|
6241 assert(index == -1, "invariant"); |
| 342 | 6242 } |
| 6243 | |
| 6244 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 6245 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 6246 "invariant" ); | |
| 6247 | |
| 6248 if (!cur->evacuation_failed()) { | |
|
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|
6249 MemRegion used_mr = cur->used_region(); |
|
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|
6250 |
| 342 | 6251 // And the region is empty. |
|
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|
6252 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
|
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|
6253 pre_used += cur->used(); |
|
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|
6254 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
| 342 | 6255 } else { |
| 6256 cur->uninstall_surv_rate_group(); | |
|
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|
6257 if (cur->is_young()) { |
| 342 | 6258 cur->set_young_index_in_cset(-1); |
|
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|
6259 } |
| 342 | 6260 cur->set_not_young(); |
| 6261 cur->set_evacuation_failed(false); | |
| 4072 | 6262 // The region is now considered to be old. |
| 6263 _old_set.add(cur); | |
| 10405 | 6264 evacuation_info.increment_collectionset_used_after(cur->used()); |
| 342 | 6265 } |
| 6266 cur = next; | |
| 6267 } | |
| 6268 | |
| 10405 | 6269 evacuation_info.set_regions_freed(local_free_list.length()); |
| 342 | 6270 policy->record_max_rs_lengths(rs_lengths); |
| 6271 policy->cset_regions_freed(); | |
| 6272 | |
| 6273 double end_sec = os::elapsedTime(); | |
| 6274 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
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|
6275 |
|
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|
6276 if (non_young) { |
| 342 | 6277 non_young_time_ms += elapsed_ms; |
|
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|
6278 } else { |
| 342 | 6279 young_time_ms += elapsed_ms; |
|
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|
6280 } |
| 342 | 6281 |
|
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|
6282 prepend_to_freelist(&local_free_list); |
|
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|
6283 decrement_summary_bytes(pre_used); |
|
6219
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|
6284 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
|
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|
6285 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6286 } |
| 6287 | |
|
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|
6288 // This routine is similar to the above but does not record |
|
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|
6289 // any policy statistics or update free lists; we are abandoning |
|
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|
6290 // the current incremental collection set in preparation of a |
|
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|
6291 // full collection. After the full GC we will start to build up |
|
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|
6292 // the incremental collection set again. |
|
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|
6293 // This is only called when we're doing a full collection |
|
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|
6294 // and is immediately followed by the tearing down of the young list. |
|
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|
6295 |
|
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|
6296 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
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|
6297 HeapRegion* cur = cs_head; |
|
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|
6298 |
|
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changeset
|
6299 while (cur != NULL) { |
|
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|
6300 HeapRegion* next = cur->next_in_collection_set(); |
|
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|
6301 assert(cur->in_collection_set(), "bad CS"); |
|
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|
6302 cur->set_next_in_collection_set(NULL); |
|
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|
6303 cur->set_in_collection_set(false); |
|
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|
6304 cur->set_young_index_in_cset(-1); |
|
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|
6305 cur = next; |
|
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|
6306 } |
|
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|
6307 } |
|
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|
6308 |
| 2152 | 6309 void G1CollectedHeap::set_free_regions_coming() { |
| 6310 if (G1ConcRegionFreeingVerbose) { | |
| 6311 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6312 "setting free regions coming"); | |
| 6313 } | |
| 6314 | |
| 6315 assert(!free_regions_coming(), "pre-condition"); | |
| 6316 _free_regions_coming = true; | |
| 342 | 6317 } |
| 6318 | |
| 2152 | 6319 void G1CollectedHeap::reset_free_regions_coming() { |
|
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7127706: G1: re-enable survivors during the initial-mark pause
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|
6320 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
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|
6321 |
| 2152 | 6322 { |
| 6323 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6324 _free_regions_coming = false; | |
| 6325 SecondaryFreeList_lock->notify_all(); | |
| 6326 } | |
| 6327 | |
| 6328 if (G1ConcRegionFreeingVerbose) { | |
| 6329 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6330 "reset free regions coming"); | |
| 342 | 6331 } |
| 6332 } | |
| 6333 | |
| 2152 | 6334 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6335 // Most of the time we won't have to wait, so let's do a quick test | |
| 6336 // first before we take the lock. | |
| 6337 if (!free_regions_coming()) { | |
| 6338 return; | |
| 6339 } | |
| 6340 | |
| 6341 if (G1ConcRegionFreeingVerbose) { | |
| 6342 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6343 "waiting for free regions"); | |
| 342 | 6344 } |
| 6345 | |
| 6346 { | |
| 2152 | 6347 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6348 while (free_regions_coming()) { | |
| 6349 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6350 } |
| 2152 | 6351 } |
| 6352 | |
| 6353 if (G1ConcRegionFreeingVerbose) { | |
| 6354 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6355 "done waiting for free regions"); | |
| 6356 } | |
| 342 | 6357 } |
| 6358 | |
| 6359 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6360 assert(heap_lock_held_for_gc(), | |
| 6361 "the heap lock should already be held by or for this thread"); | |
| 6362 _young_list->push_region(hr); | |
| 6363 } | |
| 6364 | |
| 6365 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6366 private: | |
| 6367 bool _success; | |
| 6368 public: | |
| 6369 NoYoungRegionsClosure() : _success(true) { } | |
| 6370 bool doHeapRegion(HeapRegion* r) { | |
| 6371 if (r->is_young()) { | |
| 6372 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6373 r->bottom(), r->end()); | |
| 6374 _success = false; | |
| 6375 } | |
| 6376 return false; | |
| 6377 } | |
| 6378 bool success() { return _success; } | |
| 6379 }; | |
| 6380 | |
|
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|
6381 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
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|
6382 bool ret = _young_list->check_list_empty(check_sample); |
|
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|
6383 |
|
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|
6384 if (check_heap) { |
| 342 | 6385 NoYoungRegionsClosure closure; |
| 6386 heap_region_iterate(&closure); | |
| 6387 ret = ret && closure.success(); | |
| 6388 } | |
| 6389 | |
| 6390 return ret; | |
| 6391 } | |
| 6392 | |
| 4072 | 6393 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6394 private: | |
|
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|
6395 HeapRegionSet *_old_set; |
| 2152 | 6396 |
| 342 | 6397 public: |
|
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|
6398 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6399 |
| 342 | 6400 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6401 if (r->is_empty()) { |
| 6402 // We ignore empty regions, we'll empty the free list afterwards | |
| 6403 } else if (r->is_young()) { | |
| 6404 // We ignore young regions, we'll empty the young list afterwards | |
| 6405 } else if (r->isHumongous()) { | |
| 6406 // We ignore humongous regions, we're not tearing down the | |
| 6407 // humongous region set | |
| 342 | 6408 } else { |
| 4072 | 6409 // The rest should be old |
| 6410 _old_set->remove(r); | |
| 342 | 6411 } |
| 6412 return false; | |
| 6413 } | |
| 6414 | |
| 4072 | 6415 ~TearDownRegionSetsClosure() { |
| 6416 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6417 } |
| 342 | 6418 }; |
| 6419 | |
| 4072 | 6420 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6421 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6422 | |
| 6423 if (!free_list_only) { | |
| 6424 TearDownRegionSetsClosure cl(&_old_set); | |
| 6425 heap_region_iterate(&cl); | |
| 6426 | |
| 17764 | 6427 // Note that emptying the _young_list is postponed and instead done as |
| 6428 // the first step when rebuilding the regions sets again. The reason for | |
| 6429 // this is that during a full GC string deduplication needs to know if | |
| 6430 // a collected region was young or old when the full GC was initiated. | |
| 4072 | 6431 } |
| 6432 _free_list.remove_all(); | |
| 6433 } | |
| 6434 | |
| 6435 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6436 private: | |
| 6437 bool _free_list_only; | |
|
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|
6438 HeapRegionSet* _old_set; |
| 4072 | 6439 FreeRegionList* _free_list; |
| 6440 size_t _total_used; | |
| 6441 | |
| 6442 public: | |
| 6443 RebuildRegionSetsClosure(bool free_list_only, | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6444 HeapRegionSet* old_set, FreeRegionList* free_list) : |
| 4072 | 6445 _free_list_only(free_list_only), |
| 6446 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 6447 assert(_free_list->is_empty(), "pre-condition"); | |
| 6448 if (!free_list_only) { | |
| 6449 assert(_old_set->is_empty(), "pre-condition"); | |
| 6450 } | |
| 6451 } | |
| 6452 | |
| 6453 bool doHeapRegion(HeapRegion* r) { | |
| 6454 if (r->continuesHumongous()) { | |
| 6455 return false; | |
| 6456 } | |
| 6457 | |
| 6458 if (r->is_empty()) { | |
| 6459 // Add free regions to the free list | |
| 6460 _free_list->add_as_tail(r); | |
| 6461 } else if (!_free_list_only) { | |
| 6462 assert(!r->is_young(), "we should not come across young regions"); | |
| 6463 | |
| 6464 if (r->isHumongous()) { | |
| 6465 // We ignore humongous regions, we left the humongous set unchanged | |
| 6466 } else { | |
| 6467 // The rest should be old, add them to the old set | |
| 6468 _old_set->add(r); | |
| 6469 } | |
| 6470 _total_used += r->used(); | |
| 6471 } | |
| 6472 | |
| 6473 return false; | |
| 6474 } | |
| 6475 | |
| 6476 size_t total_used() { | |
| 6477 return _total_used; | |
| 6478 } | |
| 6479 }; | |
| 6480 | |
| 6481 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6482 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6483 | |
| 17764 | 6484 if (!free_list_only) { |
| 6485 _young_list->empty_list(); | |
| 6486 } | |
| 6487 | |
| 4072 | 6488 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); |
| 6489 heap_region_iterate(&cl); | |
| 6490 | |
| 6491 if (!free_list_only) { | |
| 6492 _summary_bytes_used = cl.total_used(); | |
| 6493 } | |
| 6494 assert(_summary_bytes_used == recalculate_used(), | |
| 6495 err_msg("inconsistent _summary_bytes_used, " | |
| 6496 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 6497 _summary_bytes_used, recalculate_used())); | |
| 342 | 6498 } |
| 6499 | |
| 6500 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6501 _refine_cte_cl->set_concurrent(concurrent); | |
| 6502 } | |
| 6503 | |
| 6504 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6505 HeapRegion* hr = heap_region_containing(p); | |
| 6506 if (hr == NULL) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
6507 return false; |
| 342 | 6508 } else { |
| 6509 return hr->is_in(p); | |
| 6510 } | |
| 6511 } | |
| 2152 | 6512 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6513 // 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
|
6514 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6515 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
|
6516 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6517 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6518 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6519 "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
|
6520 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
|
6521 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6522 HeapRegion* new_alloc_region = new_region(word_size, |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6523 false /* is_old */, |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6524 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6525 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6526 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6527 _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
|
6528 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6529 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6530 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6531 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6532 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6533 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6534 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6535 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6536 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
|
6537 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
|
6538 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6539 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
|
6540 _summary_bytes_used += allocated_bytes; |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6541 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6542 // 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
|
6543 // instead of when it's allocated, since this is the point that its |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6544 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6545 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6546 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6547 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6548 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
|
6549 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6550 return _g1h->new_mutator_alloc_region(word_size, force); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6551 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6552 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6553 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6554 // Don't change the number of workers. Use the value previously set |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6555 // in the workgroup. |
| 4711 | 6556 assert(G1CollectedHeap::use_parallel_gc_threads(), "shouldn't be here otherwise"); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6557 uint n_workers = workers()->active_workers(); |
| 4711 | 6558 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6559 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6560 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6561 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6562 assert(false, "Should have been set in prior evacuation pause."); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6563 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6564 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6565 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6566 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6567 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6568 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6569 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6570 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6571 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6572 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6573 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6574 // Methods for the GC alloc regions |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6575 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6576 HeapRegion* G1CollectedHeap::new_gc_alloc_region(size_t word_size, |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6577 uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6578 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6579 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6580 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6581 if (count < g1_policy()->max_regions(ap)) { |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6582 bool survivor = (ap == GCAllocForSurvived); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6583 HeapRegion* new_alloc_region = new_region(word_size, |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6584 !survivor, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6585 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6586 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6587 // We really only need to do this for old regions given that we |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6588 // should never scan survivors. But it doesn't hurt to do it |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6589 // for survivors too. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6590 new_alloc_region->set_saved_mark(); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6591 if (survivor) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6592 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6593 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6594 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6595 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6596 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6597 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6598 new_alloc_region->note_start_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6599 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6600 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6601 g1_policy()->note_alloc_region_limit_reached(ap); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6602 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6603 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6604 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6605 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6606 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6607 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6608 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6609 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6610 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6611 alloc_region->note_end_of_copying(during_im); |
|
3830
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|
6612 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
|
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|
6613 if (ap == GCAllocForSurvived) { |
|
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|
6614 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6615 } else { |
| 6616 _old_set.add(alloc_region); | |
|
3830
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|
6617 } |
|
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|
6618 _hr_printer.retire(alloc_region); |
|
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|
6619 } |
|
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|
6620 |
|
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|
6621 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
|
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|
6622 bool force) { |
|
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|
6623 assert(!force, "not supported for GC alloc regions"); |
|
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|
6624 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
|
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|
6625 } |
|
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|
6626 |
|
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|
6627 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
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|
6628 size_t allocated_bytes) { |
|
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|
6629 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
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|
6630 GCAllocForSurvived); |
|
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|
6631 } |
|
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|
6632 |
|
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|
6633 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
|
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|
6634 bool force) { |
|
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|
6635 assert(!force, "not supported for GC alloc regions"); |
|
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|
6636 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
|
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|
6637 } |
|
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|
6638 |
|
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|
6639 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
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|
6640 size_t allocated_bytes) { |
|
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|
6641 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
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|
6642 GCAllocForTenured); |
|
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|
6643 } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
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|
6644 // Heap region set verification |
|
abdfc822206f
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|
6645 |
| 2152 | 6646 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6647 private: | |
|
17736
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|
6648 HeapRegionSet* _old_set; |
|
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|
6649 HeapRegionSet* _humongous_set; |
|
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|
6650 FreeRegionList* _free_list; |
| 2152 | 6651 |
| 6652 public: | |
|
17736
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|
6653 HeapRegionSetCount _old_count; |
|
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|
6654 HeapRegionSetCount _humongous_count; |
|
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|
6655 HeapRegionSetCount _free_count; |
|
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|
6656 |
|
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|
6657 VerifyRegionListsClosure(HeapRegionSet* old_set, |
|
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|
6658 HeapRegionSet* humongous_set, |
| 2152 | 6659 FreeRegionList* free_list) : |
|
17736
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|
6660 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
|
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|
6661 _old_count(), _humongous_count(), _free_count(){ } |
| 2152 | 6662 |
| 6663 bool doHeapRegion(HeapRegion* hr) { | |
| 6664 if (hr->continuesHumongous()) { | |
| 6665 return false; | |
| 6666 } | |
| 6667 | |
| 6668 if (hr->is_young()) { | |
| 6669 // TODO | |
| 6670 } else if (hr->startsHumongous()) { | |
|
17736
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|
6671 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->region_num())); |
|
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|
6672 _humongous_count.increment(1u, hr->capacity()); |
| 2152 | 6673 } else if (hr->is_empty()) { |
|
17736
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|
6674 assert(hr->containing_set() == _free_list, err_msg("Heap region %u is empty but not on the free list.", hr->region_num())); |
|
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|
6675 _free_count.increment(1u, hr->capacity()); |
| 4072 | 6676 } else { |
|
17736
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brutisso
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diff
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|
6677 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->region_num())); |
|
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|
6678 _old_count.increment(1u, hr->capacity()); |
| 2152 | 6679 } |
| 6680 return false; | |
| 6681 } | |
|
17736
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brutisso
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diff
changeset
|
6682 |
|
58fc1b1523dc
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|
6683 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
|
58fc1b1523dc
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|
6684 guarantee(old_set->length() == _old_count.length(), err_msg("Old set count mismatch. Expected %u, actual %u.", old_set->length(), _old_count.length())); |
|
58fc1b1523dc
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brutisso
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|
6685 guarantee(old_set->total_capacity_bytes() == _old_count.capacity(), err_msg("Old set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
58fc1b1523dc
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|
6686 old_set->total_capacity_bytes(), _old_count.capacity())); |
|
58fc1b1523dc
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brutisso
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|
6687 |
|
58fc1b1523dc
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|
6688 guarantee(humongous_set->length() == _humongous_count.length(), err_msg("Hum set count mismatch. Expected %u, actual %u.", humongous_set->length(), _humongous_count.length())); |
|
58fc1b1523dc
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|
6689 guarantee(humongous_set->total_capacity_bytes() == _humongous_count.capacity(), err_msg("Hum set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
58fc1b1523dc
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|
6690 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
|
58fc1b1523dc
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brutisso
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changeset
|
6691 |
|
58fc1b1523dc
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brutisso
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diff
changeset
|
6692 guarantee(free_list->length() == _free_count.length(), err_msg("Free list count mismatch. Expected %u, actual %u.", free_list->length(), _free_count.length())); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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|
6693 guarantee(free_list->total_capacity_bytes() == _free_count.capacity(), err_msg("Free list capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
58fc1b1523dc
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brutisso
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|
6694 free_list->total_capacity_bytes(), _free_count.capacity())); |
|
58fc1b1523dc
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brutisso
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changeset
|
6695 } |
| 2152 | 6696 }; |
| 6697 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6698 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
| 3766 | 6699 HeapWord* bottom) { |
| 6700 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6701 MemRegion mr(bottom, end); | |
| 6702 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6703 // 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
|
6704 return new HeapRegion(hrs_index, _bot_shared, mr); |
| 3766 | 6705 } |
| 6706 | |
| 2152 | 6707 void G1CollectedHeap::verify_region_sets() { |
| 6708 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6709 | |
| 6710 // First, check the explicit lists. | |
|
17736
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changeset
|
6711 _free_list.verify_list(); |
| 2152 | 6712 { |
| 6713 // Given that a concurrent operation might be adding regions to | |
| 6714 // the secondary free list we have to take the lock before | |
| 6715 // verifying it. | |
| 6716 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
17736
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|
6717 _secondary_free_list.verify_list(); |
|
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|
6718 } |
| 2152 | 6719 |
| 6720 // If a concurrent region freeing operation is in progress it will | |
| 6721 // be difficult to correctly attributed any free regions we come | |
| 6722 // across to the correct free list given that they might belong to | |
| 6723 // one of several (free_list, secondary_free_list, any local lists, | |
| 6724 // etc.). So, if that's the case we will skip the rest of the | |
| 6725 // verification operation. Alternatively, waiting for the concurrent | |
| 6726 // operation to complete will have a non-trivial effect on the GC's | |
| 6727 // operation (no concurrent operation will last longer than the | |
| 6728 // interval between two calls to verification) and it might hide | |
| 6729 // any issues that we would like to catch during testing. | |
| 6730 if (free_regions_coming()) { | |
| 6731 return; | |
| 6732 } | |
| 6733 | |
| 2361 | 6734 // Make sure we append the secondary_free_list on the free_list so |
| 6735 // that all free regions we will come across can be safely | |
| 6736 // attributed to the free_list. | |
| 6737 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6738 |
| 6739 // Finally, make sure that the region accounting in the lists is | |
| 6740 // consistent with what we see in the heap. | |
| 6741 | |
| 4072 | 6742 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6743 heap_region_iterate(&cl); |
|
17736
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changeset
|
6744 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
| 342 | 6745 } |
| 12080 | 6746 |
| 6747 // Optimized nmethod scanning | |
| 6748 | |
| 6749 class RegisterNMethodOopClosure: public OopClosure { | |
| 6750 G1CollectedHeap* _g1h; | |
| 6751 nmethod* _nm; | |
| 6752 | |
| 6753 template <class T> void do_oop_work(T* p) { | |
| 6754 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6755 if (!oopDesc::is_null(heap_oop)) { | |
| 6756 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6757 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
13062
28674af341ac
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changeset
|
6758 assert(!hr->continuesHumongous(), |
|
28674af341ac
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changeset
|
6759 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
28674af341ac
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changeset
|
6760 " starting at "HR_FORMAT, |
|
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tschatzl
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changeset
|
6761 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
| 12080 | 6762 |
| 6763 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
| 6764 // entries but having duplicates is OK since we "mark" nmethods | |
| 6765 // as visited when we scan the strong code root lists during the GC. | |
| 6766 hr->add_strong_code_root(_nm); | |
|
13062
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changeset
|
6767 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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changeset
|
6768 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
|
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tschatzl
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changeset
|
6769 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6770 } |
| 6771 } | |
| 6772 | |
| 6773 public: | |
| 6774 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6775 _g1h(g1h), _nm(nm) {} | |
| 6776 | |
| 6777 void do_oop(oop* p) { do_oop_work(p); } | |
| 6778 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6779 }; | |
| 6780 | |
| 6781 class UnregisterNMethodOopClosure: public OopClosure { | |
| 6782 G1CollectedHeap* _g1h; | |
| 6783 nmethod* _nm; | |
| 6784 | |
| 6785 template <class T> void do_oop_work(T* p) { | |
| 6786 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6787 if (!oopDesc::is_null(heap_oop)) { | |
| 6788 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6789 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
13062
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changeset
|
6790 assert(!hr->continuesHumongous(), |
|
28674af341ac
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changeset
|
6791 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
28674af341ac
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changeset
|
6792 " starting at "HR_FORMAT, |
|
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changeset
|
6793 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
|
28674af341ac
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changeset
|
6794 |
| 12080 | 6795 hr->remove_strong_code_root(_nm); |
|
13062
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changeset
|
6796 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
tschatzl
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13060
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changeset
|
6797 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
|
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6798 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6799 } |
| 6800 } | |
| 6801 | |
| 6802 public: | |
| 6803 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6804 _g1h(g1h), _nm(nm) {} | |
| 6805 | |
| 6806 void do_oop(oop* p) { do_oop_work(p); } | |
| 6807 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6808 }; | |
| 6809 | |
| 6810 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
| 6811 CollectedHeap::register_nmethod(nm); | |
| 6812 | |
| 6813 guarantee(nm != NULL, "sanity"); | |
| 6814 RegisterNMethodOopClosure reg_cl(this, nm); | |
| 6815 nm->oops_do(®_cl); | |
| 6816 } | |
| 6817 | |
| 6818 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
| 6819 CollectedHeap::unregister_nmethod(nm); | |
| 6820 | |
| 6821 guarantee(nm != NULL, "sanity"); | |
| 6822 UnregisterNMethodOopClosure reg_cl(this, nm); | |
| 6823 nm->oops_do(®_cl, true); | |
| 6824 } | |
| 6825 | |
| 6826 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
| 6827 public: | |
| 6828 bool doHeapRegion(HeapRegion *hr) { | |
|
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6829 assert(!hr->isHumongous(), |
|
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6830 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
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6831 HR_FORMAT_PARAMS(hr))); |
| 12080 | 6832 hr->migrate_strong_code_roots(); |
| 6833 return false; | |
| 6834 } | |
| 6835 }; | |
| 6836 | |
| 6837 void G1CollectedHeap::migrate_strong_code_roots() { | |
| 6838 MigrateCodeRootsHeapRegionClosure cl; | |
| 6839 double migrate_start = os::elapsedTime(); | |
| 6840 collection_set_iterate(&cl); | |
| 6841 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
| 6842 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
| 6843 } | |
| 6844 | |
|
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6845 void G1CollectedHeap::purge_code_root_memory() { |
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6846 double purge_start = os::elapsedTime(); |
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6847 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
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6848 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
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6849 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
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6850 } |
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6851 |
| 12080 | 6852 // Mark all the code roots that point into regions *not* in the |
| 6853 // collection set. | |
| 6854 // | |
| 6855 // Note we do not want to use a "marking" CodeBlobToOopClosure while | |
| 6856 // walking the the code roots lists of regions not in the collection | |
| 6857 // set. Suppose we have an nmethod (M) that points to objects in two | |
| 6858 // separate regions - one in the collection set (R1) and one not (R2). | |
| 6859 // Using a "marking" CodeBlobToOopClosure here would result in "marking" | |
| 6860 // nmethod M when walking the code roots for R1. When we come to scan | |
| 6861 // the code roots for R2, we would see that M is already marked and it | |
| 6862 // would be skipped and the objects in R2 that are referenced from M | |
| 6863 // would not be evacuated. | |
| 6864 | |
| 6865 class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { | |
| 6866 | |
| 6867 class MarkStrongCodeRootOopClosure: public OopClosure { | |
| 6868 ConcurrentMark* _cm; | |
| 6869 HeapRegion* _hr; | |
| 6870 uint _worker_id; | |
| 6871 | |
| 6872 template <class T> void do_oop_work(T* p) { | |
| 6873 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6874 if (!oopDesc::is_null(heap_oop)) { | |
| 6875 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6876 // Only mark objects in the region (which is assumed | |
| 6877 // to be not in the collection set). | |
| 6878 if (_hr->is_in(obj)) { | |
| 6879 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); | |
| 6880 } | |
| 6881 } | |
| 6882 } | |
| 6883 | |
| 6884 public: | |
| 6885 MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : | |
| 6886 _cm(cm), _hr(hr), _worker_id(worker_id) { | |
| 6887 assert(!_hr->in_collection_set(), "sanity"); | |
| 6888 } | |
| 6889 | |
| 6890 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6891 void do_oop(oop* p) { do_oop_work(p); } | |
| 6892 }; | |
| 6893 | |
| 6894 MarkStrongCodeRootOopClosure _oop_cl; | |
| 6895 | |
| 6896 public: | |
| 6897 MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): | |
| 6898 _oop_cl(cm, hr, worker_id) {} | |
| 6899 | |
| 6900 void do_code_blob(CodeBlob* cb) { | |
| 6901 nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); | |
| 6902 if (nm != NULL) { | |
| 6903 nm->oops_do(&_oop_cl); | |
| 6904 } | |
| 6905 } | |
| 6906 }; | |
| 6907 | |
| 6908 class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { | |
| 6909 G1CollectedHeap* _g1h; | |
| 6910 uint _worker_id; | |
| 6911 | |
| 6912 public: | |
| 6913 MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : | |
| 6914 _g1h(g1h), _worker_id(worker_id) {} | |
| 6915 | |
| 6916 bool doHeapRegion(HeapRegion *hr) { | |
| 6917 HeapRegionRemSet* hrrs = hr->rem_set(); | |
|
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6918 if (hr->continuesHumongous()) { |
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6919 // Code roots should never be attached to a continuation of a humongous region |
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6920 assert(hrrs->strong_code_roots_list_length() == 0, |
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6921 err_msg("code roots should never be attached to continuations of humongous region "HR_FORMAT |
|
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6922 " starting at "HR_FORMAT", but has "SIZE_FORMAT, |
|
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6923 HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()), |
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6924 hrrs->strong_code_roots_list_length())); |
| 12080 | 6925 return false; |
| 6926 } | |
| 6927 | |
| 6928 if (hr->in_collection_set()) { | |
| 6929 // Don't mark code roots into regions in the collection set here. | |
| 6930 // They will be marked when we scan them. | |
| 6931 return false; | |
| 6932 } | |
| 6933 | |
| 6934 MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); | |
| 6935 hr->strong_code_roots_do(&cb_cl); | |
| 6936 return false; | |
| 6937 } | |
| 6938 }; | |
| 6939 | |
| 6940 void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { | |
| 6941 MarkStrongCodeRootsHRClosure cl(this, worker_id); | |
|
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6942 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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6943 heap_region_par_iterate_chunked(&cl, |
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6944 worker_id, |
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6945 workers()->active_workers(), |
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6946 HeapRegion::ParMarkRootClaimValue); |
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6947 } else { |
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6948 heap_region_iterate(&cl); |
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6949 } |
| 12080 | 6950 } |
| 6951 | |
| 6952 class RebuildStrongCodeRootClosure: public CodeBlobClosure { | |
| 6953 G1CollectedHeap* _g1h; | |
| 6954 | |
| 6955 public: | |
| 6956 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
| 6957 _g1h(g1h) {} | |
| 6958 | |
| 6959 void do_code_blob(CodeBlob* cb) { | |
| 6960 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
| 6961 if (nm == NULL) { | |
| 6962 return; | |
| 6963 } | |
| 6964 | |
| 6965 if (ScavengeRootsInCode && nm->detect_scavenge_root_oops()) { | |
| 6966 _g1h->register_nmethod(nm); | |
| 6967 } | |
| 6968 } | |
| 6969 }; | |
| 6970 | |
| 6971 void G1CollectedHeap::rebuild_strong_code_roots() { | |
| 6972 RebuildStrongCodeRootClosure blob_cl(this); | |
| 6973 CodeCache::blobs_do(&blob_cl); | |
| 6974 } |