Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20192:581e70386ec9
8039147: Cleanup SuspendibleThreadSet
Reviewed-by: brutisso, tschatzl, mgerdin
| author | pliden |
|---|---|
| date | Fri, 11 Apr 2014 12:29:24 +0200 |
| parents | fd81a5764900 |
| children | ce8f6bb717c9 |
| 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 G1RemSet* _g1rs; | |
| 100 ConcurrentG1Refine* _cg1r; | |
| 101 bool _concurrent; | |
| 102 public: | |
| 20192 | 103 RefineCardTableEntryClosure(G1RemSet* g1rs, |
| 342 | 104 ConcurrentG1Refine* cg1r) : |
| 20192 | 105 _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) |
| 342 | 106 {} |
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107 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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108 bool oops_into_cset = _g1rs->refine_card(card_ptr, worker_i, false); |
| 1705 | 109 // This path is executed by the concurrent refine or mutator threads, |
| 110 // concurrently, and so we do not care if card_ptr contains references | |
| 111 // that point into the collection set. | |
| 112 assert(!oops_into_cset, "should be"); | |
| 113 | |
| 20192 | 114 if (_concurrent && SuspendibleThreadSet::should_yield()) { |
| 342 | 115 // Caller will actually yield. |
| 116 return false; | |
| 117 } | |
| 118 // Otherwise, we finished successfully; return true. | |
| 119 return true; | |
| 120 } | |
| 121 void set_concurrent(bool b) { _concurrent = b; } | |
| 122 }; | |
| 123 | |
| 124 | |
| 125 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 126 int _calls; | |
| 127 G1CollectedHeap* _g1h; | |
| 128 CardTableModRefBS* _ctbs; | |
| 129 int _histo[256]; | |
| 130 public: | |
| 131 ClearLoggedCardTableEntryClosure() : | |
| 12343 | 132 _calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) |
| 342 | 133 { |
| 134 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 135 } | |
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136 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
| 342 | 137 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { |
| 138 _calls++; | |
| 139 unsigned char* ujb = (unsigned char*)card_ptr; | |
| 140 int ind = (int)(*ujb); | |
| 141 _histo[ind]++; | |
| 142 *card_ptr = -1; | |
| 143 } | |
| 144 return true; | |
| 145 } | |
| 146 int calls() { return _calls; } | |
| 147 void print_histo() { | |
| 148 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 149 for (int i = 0; i < 256; i++) { | |
| 150 if (_histo[i] != 0) { | |
| 151 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 152 } | |
| 153 } | |
| 154 } | |
| 155 }; | |
| 156 | |
| 157 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 158 int _calls; | |
| 159 G1CollectedHeap* _g1h; | |
| 160 CardTableModRefBS* _ctbs; | |
| 161 public: | |
| 162 RedirtyLoggedCardTableEntryClosure() : | |
| 12343 | 163 _calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) {} |
| 164 | |
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165 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
| 342 | 166 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { |
| 167 _calls++; | |
| 168 *card_ptr = 0; | |
| 169 } | |
| 170 return true; | |
| 171 } | |
| 172 int calls() { return _calls; } | |
| 173 }; | |
| 174 | |
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175 YoungList::YoungList(G1CollectedHeap* g1h) : |
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176 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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177 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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178 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 179 } |
| 180 | |
| 181 void YoungList::push_region(HeapRegion *hr) { | |
| 182 assert(!hr->is_young(), "should not already be young"); | |
| 183 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 184 | |
| 185 hr->set_next_young_region(_head); | |
| 186 _head = hr; | |
| 187 | |
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188 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 189 ++_length; |
| 190 } | |
| 191 | |
| 192 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 193 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 194 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 195 | |
| 196 hr->set_next_young_region(_survivor_head); | |
| 197 if (_survivor_head == NULL) { | |
| 545 | 198 _survivor_tail = hr; |
| 342 | 199 } |
| 200 _survivor_head = hr; | |
| 201 ++_survivor_length; | |
| 202 } | |
| 203 | |
| 204 void YoungList::empty_list(HeapRegion* list) { | |
| 205 while (list != NULL) { | |
| 206 HeapRegion* next = list->get_next_young_region(); | |
| 207 list->set_next_young_region(NULL); | |
| 208 list->uninstall_surv_rate_group(); | |
| 209 list->set_not_young(); | |
| 210 list = next; | |
| 211 } | |
| 212 } | |
| 213 | |
| 214 void YoungList::empty_list() { | |
| 215 assert(check_list_well_formed(), "young list should be well formed"); | |
| 216 | |
| 217 empty_list(_head); | |
| 218 _head = NULL; | |
| 219 _length = 0; | |
| 220 | |
| 221 empty_list(_survivor_head); | |
| 222 _survivor_head = NULL; | |
| 545 | 223 _survivor_tail = NULL; |
| 342 | 224 _survivor_length = 0; |
| 225 | |
| 226 _last_sampled_rs_lengths = 0; | |
| 227 | |
| 228 assert(check_list_empty(false), "just making sure..."); | |
| 229 } | |
| 230 | |
| 231 bool YoungList::check_list_well_formed() { | |
| 232 bool ret = true; | |
| 233 | |
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234 uint length = 0; |
| 342 | 235 HeapRegion* curr = _head; |
| 236 HeapRegion* last = NULL; | |
| 237 while (curr != NULL) { | |
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238 if (!curr->is_young()) { |
| 342 | 239 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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240 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 241 curr->bottom(), curr->end(), |
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242 curr->is_young(), curr->is_survivor()); |
| 342 | 243 ret = false; |
| 244 } | |
| 245 ++length; | |
| 246 last = curr; | |
| 247 curr = curr->get_next_young_region(); | |
| 248 } | |
| 249 ret = ret && (length == _length); | |
| 250 | |
| 251 if (!ret) { | |
| 252 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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253 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
| 342 | 254 length, _length); |
| 255 } | |
| 256 | |
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257 return ret; |
| 342 | 258 } |
| 259 | |
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260 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 261 bool ret = true; |
| 262 | |
| 263 if (_length != 0) { | |
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264 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
| 342 | 265 _length); |
| 266 ret = false; | |
| 267 } | |
| 268 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 269 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 270 ret = false; | |
| 271 } | |
| 272 if (_head != NULL) { | |
| 273 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 274 ret = false; | |
| 275 } | |
| 276 if (!ret) { | |
| 277 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 278 } | |
| 279 | |
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280 return ret; |
| 342 | 281 } |
| 282 | |
| 283 void | |
| 284 YoungList::rs_length_sampling_init() { | |
| 285 _sampled_rs_lengths = 0; | |
| 286 _curr = _head; | |
| 287 } | |
| 288 | |
| 289 bool | |
| 290 YoungList::rs_length_sampling_more() { | |
| 291 return _curr != NULL; | |
| 292 } | |
| 293 | |
| 294 void | |
| 295 YoungList::rs_length_sampling_next() { | |
| 296 assert( _curr != NULL, "invariant" ); | |
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297 size_t rs_length = _curr->rem_set()->occupied(); |
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298 |
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299 _sampled_rs_lengths += rs_length; |
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300 |
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301 // The current region may not yet have been added to the |
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302 // incremental collection set (it gets added when it is |
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303 // retired as the current allocation region). |
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304 if (_curr->in_collection_set()) { |
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305 // Update the collection set policy information for this region |
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306 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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307 } |
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308 |
| 342 | 309 _curr = _curr->get_next_young_region(); |
| 310 if (_curr == NULL) { | |
| 311 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 312 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 void | |
| 317 YoungList::reset_auxilary_lists() { | |
| 318 guarantee( is_empty(), "young list should be empty" ); | |
| 319 assert(check_list_well_formed(), "young list should be well formed"); | |
| 320 | |
| 321 // Add survivor regions to SurvRateGroup. | |
| 322 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 323 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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324 |
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325 int young_index_in_cset = 0; |
| 342 | 326 for (HeapRegion* curr = _survivor_head; |
| 327 curr != NULL; | |
| 328 curr = curr->get_next_young_region()) { | |
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329 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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330 |
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331 // The region is a non-empty survivor so let's add it to |
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332 // the incremental collection set for the next evacuation |
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333 // pause. |
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334 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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335 young_index_in_cset += 1; |
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336 } |
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337 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
| 342 | 338 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 339 | |
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340 _head = _survivor_head; |
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341 _length = _survivor_length; |
| 342 | 342 if (_survivor_head != NULL) { |
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343 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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344 assert(_survivor_length > 0, "invariant"); |
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345 _survivor_tail->set_next_young_region(NULL); |
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346 } |
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347 |
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348 // Don't clear the survivor list handles until the start of |
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349 // the next evacuation pause - we need it in order to re-tag |
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350 // the survivor regions from this evacuation pause as 'young' |
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351 // at the start of the next. |
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352 |
| 545 | 353 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 354 |
| 355 assert(check_list_well_formed(), "young list should be well formed"); | |
| 356 } | |
| 357 | |
| 358 void YoungList::print() { | |
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359 HeapRegion* lists[] = {_head, _survivor_head}; |
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360 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 361 |
| 362 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 363 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 364 HeapRegion *curr = lists[list]; | |
| 365 if (curr == NULL) | |
| 366 gclog_or_tty->print_cr(" empty"); | |
| 367 while (curr != NULL) { | |
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368 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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369 HR_FORMAT_PARAMS(curr), |
| 342 | 370 curr->prev_top_at_mark_start(), |
| 371 curr->next_top_at_mark_start(), | |
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372 curr->age_in_surv_rate_group_cond()); |
| 342 | 373 curr = curr->get_next_young_region(); |
| 374 } | |
| 375 } | |
| 376 | |
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377 gclog_or_tty->cr(); |
| 342 | 378 } |
| 379 | |
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380 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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381 { |
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382 // Claim the right to put the region on the dirty cards region list |
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383 // by installing a self pointer. |
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384 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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385 if (next == NULL) { |
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386 HeapRegion* res = (HeapRegion*) |
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387 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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388 NULL); |
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389 if (res == NULL) { |
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390 HeapRegion* head; |
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391 do { |
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392 // Put the region to the dirty cards region list. |
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393 head = _dirty_cards_region_list; |
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394 next = (HeapRegion*) |
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395 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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396 if (next == head) { |
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397 assert(hr->get_next_dirty_cards_region() == hr, |
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398 "hr->get_next_dirty_cards_region() != hr"); |
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399 if (next == NULL) { |
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400 // The last region in the list points to itself. |
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401 hr->set_next_dirty_cards_region(hr); |
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402 } else { |
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403 hr->set_next_dirty_cards_region(next); |
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404 } |
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405 } |
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406 } while (next != head); |
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407 } |
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408 } |
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409 } |
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410 |
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411 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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412 { |
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413 HeapRegion* head; |
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414 HeapRegion* hr; |
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415 do { |
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416 head = _dirty_cards_region_list; |
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417 if (head == NULL) { |
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418 return NULL; |
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419 } |
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420 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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421 if (head == new_head) { |
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422 // The last region. |
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423 new_head = NULL; |
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424 } |
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425 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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426 head); |
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427 } while (hr != head); |
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428 assert(hr != NULL, "invariant"); |
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429 hr->set_next_dirty_cards_region(NULL); |
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430 return hr; |
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431 } |
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432 |
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433 #ifdef ASSERT |
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434 // A region is added to the collection set as it is retired |
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435 // so an address p can point to a region which will be in the |
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436 // collection set but has not yet been retired. This method |
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437 // therefore is only accurate during a GC pause after all |
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438 // regions have been retired. It is used for debugging |
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439 // to check if an nmethod has references to objects that can |
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440 // be move during a partial collection. Though it can be |
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441 // inaccurate, it is sufficient for G1 because the conservative |
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442 // implementation of is_scavengable() for G1 will indicate that |
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443 // all nmethods must be scanned during a partial collection. |
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444 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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445 HeapRegion* hr = heap_region_containing(p); |
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446 return hr != NULL && hr->in_collection_set(); |
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447 } |
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448 #endif |
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449 |
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450 // Returns true if the reference points to an object that |
| 10405 | 451 // can move in an incremental collection. |
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452 bool G1CollectedHeap::is_scavengable(const void* p) { |
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453 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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454 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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455 HeapRegion* hr = heap_region_containing(p); |
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456 if (hr == NULL) { |
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457 // null |
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458 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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459 return false; |
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460 } else { |
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461 return !hr->isHumongous(); |
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462 } |
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463 } |
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464 |
| 342 | 465 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 466 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 12343 | 467 CardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 468 |
| 469 // Count the dirty cards at the start. | |
| 470 CountNonCleanMemRegionClosure count1(this); | |
| 471 ct_bs->mod_card_iterate(&count1); | |
| 472 int orig_count = count1.n(); | |
| 473 | |
| 474 // First clear the logged cards. | |
| 475 ClearLoggedCardTableEntryClosure clear; | |
| 476 dcqs.set_closure(&clear); | |
| 477 dcqs.apply_closure_to_all_completed_buffers(); | |
| 478 dcqs.iterate_closure_all_threads(false); | |
| 479 clear.print_histo(); | |
| 480 | |
| 481 // Now ensure that there's no dirty cards. | |
| 482 CountNonCleanMemRegionClosure count2(this); | |
| 483 ct_bs->mod_card_iterate(&count2); | |
| 484 if (count2.n() != 0) { | |
| 485 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 486 count2.n(), orig_count); | |
| 487 } | |
| 488 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 489 | |
| 490 RedirtyLoggedCardTableEntryClosure redirty; | |
| 491 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
| 492 dcqs.apply_closure_to_all_completed_buffers(); | |
| 493 dcqs.iterate_closure_all_threads(false); | |
| 494 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
| 495 clear.calls(), orig_count); | |
| 496 guarantee(redirty.calls() == clear.calls(), | |
| 497 "Or else mechanism is broken."); | |
| 498 | |
| 499 CountNonCleanMemRegionClosure count3(this); | |
| 500 ct_bs->mod_card_iterate(&count3); | |
| 501 if (count3.n() != orig_count) { | |
| 502 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 503 orig_count, count3.n()); | |
| 504 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 505 } | |
| 506 | |
| 507 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 508 } | |
| 509 | |
| 510 // Private class members. | |
| 511 | |
| 512 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 513 | |
| 514 // Private methods. | |
| 515 | |
| 2152 | 516 HeapRegion* |
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517 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
| 2152 | 518 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 519 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 520 if (!_secondary_free_list.is_empty()) { | |
| 521 if (G1ConcRegionFreeingVerbose) { | |
| 522 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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523 "secondary_free_list has %u entries", |
| 2152 | 524 _secondary_free_list.length()); |
| 525 } | |
| 526 // It looks as if there are free regions available on the | |
| 527 // secondary_free_list. Let's move them to the free_list and try | |
| 528 // again to allocate from it. | |
| 529 append_secondary_free_list(); | |
| 530 | |
| 531 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
| 532 "empty we should have moved at least one entry to the free_list"); | |
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533 HeapRegion* res = _free_list.remove_region(is_old); |
| 2152 | 534 if (G1ConcRegionFreeingVerbose) { |
| 535 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 536 "allocated "HR_FORMAT" from secondary_free_list", | |
| 537 HR_FORMAT_PARAMS(res)); | |
| 538 } | |
| 539 return res; | |
| 540 } | |
| 541 | |
| 10405 | 542 // Wait here until we get notified either when (a) there are no |
| 2152 | 543 // more free regions coming or (b) some regions have been moved on |
| 544 // the secondary_free_list. | |
| 545 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 546 } | |
| 547 | |
| 548 if (G1ConcRegionFreeingVerbose) { | |
| 549 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 550 "could not allocate from secondary_free_list"); | |
| 551 } | |
| 552 return NULL; | |
| 553 } | |
| 554 | |
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555 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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556 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 557 "the only time we use this to allocate a humongous region is " |
| 558 "when we are allocating a single humongous region"); | |
| 559 | |
| 560 HeapRegion* res; | |
| 561 if (G1StressConcRegionFreeing) { | |
| 562 if (!_secondary_free_list.is_empty()) { | |
| 563 if (G1ConcRegionFreeingVerbose) { | |
| 564 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 565 "forced to look at the secondary_free_list"); | |
| 566 } | |
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567 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 568 if (res != NULL) { |
| 569 return res; | |
| 570 } | |
| 571 } | |
| 572 } | |
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573 |
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574 res = _free_list.remove_region(is_old); |
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575 |
| 2152 | 576 if (res == NULL) { |
| 577 if (G1ConcRegionFreeingVerbose) { | |
| 578 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 579 "res == NULL, trying the secondary_free_list"); | |
| 580 } | |
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581 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 582 } |
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583 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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584 // Currently, only attempts to allocate GC alloc regions set |
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585 // do_expand to true. So, we should only reach here during a |
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586 // safepoint. If this assumption changes we might have to |
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587 // reconsider the use of _expand_heap_after_alloc_failure. |
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588 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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589 |
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590 ergo_verbose1(ErgoHeapSizing, |
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591 "attempt heap expansion", |
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592 ergo_format_reason("region allocation request failed") |
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593 ergo_format_byte("allocation request"), |
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594 word_size * HeapWordSize); |
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595 if (expand(word_size * HeapWordSize)) { |
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596 // Given that expand() succeeded in expanding the heap, and we |
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597 // always expand the heap by an amount aligned to the heap |
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598 // region size, the free list should in theory not be empty. |
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599 // In either case remove_region() will check for NULL. |
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600 res = _free_list.remove_region(is_old); |
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601 } else { |
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602 _expand_heap_after_alloc_failure = false; |
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603 } |
| 342 | 604 } |
| 605 return res; | |
| 606 } | |
| 607 | |
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608 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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609 size_t word_size) { |
| 2361 | 610 assert(isHumongous(word_size), "word_size should be humongous"); |
| 611 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 612 | |
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613 uint first = G1_NULL_HRS_INDEX; |
| 2152 | 614 if (num_regions == 1) { |
| 615 // Only one region to allocate, no need to go through the slower | |
| 10405 | 616 // path. The caller will attempt the expansion if this fails, so |
| 2152 | 617 // let's not try to expand here too. |
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618 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
| 2152 | 619 if (hr != NULL) { |
| 620 first = hr->hrs_index(); | |
| 621 } else { | |
| 3766 | 622 first = G1_NULL_HRS_INDEX; |
| 2152 | 623 } |
| 624 } else { | |
| 625 // We can't allocate humongous regions while cleanupComplete() is | |
| 626 // running, since some of the regions we find to be empty might not | |
| 627 // yet be added to the free list and it is not straightforward to | |
| 628 // know which list they are on so that we can remove them. Note | |
| 629 // that we only need to do this if we need to allocate more than | |
| 630 // one region to satisfy the current humongous allocation | |
| 631 // request. If we are only allocating one region we use the common | |
| 632 // region allocation code (see above). | |
| 633 wait_while_free_regions_coming(); | |
| 2361 | 634 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 635 |
| 636 if (free_regions() >= num_regions) { | |
| 3766 | 637 first = _hrs.find_contiguous(num_regions); |
| 638 if (first != G1_NULL_HRS_INDEX) { | |
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639 for (uint i = first; i < first + num_regions; ++i) { |
| 3766 | 640 HeapRegion* hr = region_at(i); |
| 2152 | 641 assert(hr->is_empty(), "sanity"); |
| 2361 | 642 assert(is_on_master_free_list(hr), "sanity"); |
| 2152 | 643 hr->set_pending_removal(true); |
| 644 } | |
| 645 _free_list.remove_all_pending(num_regions); | |
| 646 } | |
| 647 } | |
| 648 } | |
| 649 return first; | |
| 650 } | |
| 651 | |
| 2361 | 652 HeapWord* |
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653 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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654 uint num_regions, |
| 2361 | 655 size_t word_size) { |
| 3766 | 656 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
| 2361 | 657 assert(isHumongous(word_size), "word_size should be humongous"); |
| 658 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 659 | |
| 660 // Index of last region in the series + 1. | |
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661 uint last = first + num_regions; |
| 2361 | 662 |
| 663 // We need to initialize the region(s) we just discovered. This is | |
| 664 // a bit tricky given that it can happen concurrently with | |
| 665 // refinement threads refining cards on these regions and | |
| 666 // potentially wanting to refine the BOT as they are scanning | |
| 667 // those cards (this can happen shortly after a cleanup; see CR | |
| 668 // 6991377). So we have to set up the region(s) carefully and in | |
| 669 // a specific order. | |
| 670 | |
| 671 // The word size sum of all the regions we will allocate. | |
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672 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 673 assert(word_size <= word_size_sum, "sanity"); |
| 674 | |
| 675 // This will be the "starts humongous" region. | |
| 3766 | 676 HeapRegion* first_hr = region_at(first); |
| 2361 | 677 // The header of the new object will be placed at the bottom of |
| 678 // the first region. | |
| 679 HeapWord* new_obj = first_hr->bottom(); | |
| 680 // This will be the new end of the first region in the series that | |
| 10405 | 681 // should also match the end of the last region in the series. |
| 2361 | 682 HeapWord* new_end = new_obj + word_size_sum; |
| 683 // This will be the new top of the first region that will reflect | |
| 684 // this allocation. | |
| 685 HeapWord* new_top = new_obj + word_size; | |
| 686 | |
| 687 // First, we need to zero the header of the space that we will be | |
| 688 // allocating. When we update top further down, some refinement | |
| 689 // threads might try to scan the region. By zeroing the header we | |
| 690 // ensure that any thread that will try to scan the region will | |
| 691 // come across the zero klass word and bail out. | |
| 692 // | |
| 693 // NOTE: It would not have been correct to have used | |
| 694 // CollectedHeap::fill_with_object() and make the space look like | |
| 695 // an int array. The thread that is doing the allocation will | |
| 696 // later update the object header to a potentially different array | |
| 697 // type and, for a very short period of time, the klass and length | |
| 698 // fields will be inconsistent. This could cause a refinement | |
| 699 // thread to calculate the object size incorrectly. | |
| 700 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 701 | |
| 702 // We will set up the first region as "starts humongous". This | |
| 703 // will also update the BOT covering all the regions to reflect | |
| 704 // that there is a single object that starts at the bottom of the | |
| 705 // first region. | |
| 706 first_hr->set_startsHumongous(new_top, new_end); | |
| 707 | |
| 708 // Then, if there are any, we will set up the "continues | |
| 709 // humongous" regions. | |
| 710 HeapRegion* hr = NULL; | |
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711 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 712 hr = region_at(i); |
| 2361 | 713 hr->set_continuesHumongous(first_hr); |
| 714 } | |
| 715 // If we have "continues humongous" regions (hr != NULL), then the | |
| 716 // end of the last one should match new_end. | |
| 717 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 718 | |
| 719 // Up to this point no concurrent thread would have been able to | |
| 720 // do any scanning on any region in this series. All the top | |
| 721 // fields still point to bottom, so the intersection between | |
| 722 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 723 // update the top fields, we'll do a storestore to make sure that | |
| 724 // no thread sees the update to top before the zeroing of the | |
| 725 // object header and the BOT initialization. | |
| 726 OrderAccess::storestore(); | |
| 727 | |
| 728 // Now that the BOT and the object header have been initialized, | |
| 729 // we can update top of the "starts humongous" region. | |
| 730 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 731 "new_top should be in this region"); | |
| 732 first_hr->set_top(new_top); | |
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733 if (_hr_printer.is_active()) { |
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734 HeapWord* bottom = first_hr->bottom(); |
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735 HeapWord* end = first_hr->orig_end(); |
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736 if ((first + 1) == last) { |
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737 // the series has a single humongous region |
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738 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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739 } else { |
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740 // the series has more than one humongous regions |
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741 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
|
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742 } |
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743 } |
| 2361 | 744 |
| 745 // Now, we will update the top fields of the "continues humongous" | |
| 746 // regions. The reason we need to do this is that, otherwise, | |
| 747 // these regions would look empty and this will confuse parts of | |
| 748 // G1. For example, the code that looks for a consecutive number | |
| 749 // of empty regions will consider them empty and try to | |
| 750 // re-allocate them. We can extend is_empty() to also include | |
| 751 // !continuesHumongous(), but it is easier to just update the top | |
| 752 // fields here. The way we set top for all regions (i.e., top == | |
| 753 // end for all regions but the last one, top == new_top for the | |
| 754 // last one) is actually used when we will free up the humongous | |
| 755 // region in free_humongous_region(). | |
| 756 hr = NULL; | |
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757 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 758 hr = region_at(i); |
| 2361 | 759 if ((i + 1) == last) { |
| 760 // last continues humongous region | |
| 761 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 762 "new_top should fall on this region"); | |
| 763 hr->set_top(new_top); | |
|
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764 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 765 } else { |
| 766 // not last one | |
| 767 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 768 hr->set_top(hr->end()); | |
|
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769 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 770 } |
| 771 } | |
| 772 // If we have continues humongous regions (hr != NULL), then the | |
| 773 // end of the last one should match new_end and its top should | |
| 774 // match new_top. | |
| 775 assert(hr == NULL || | |
| 776 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
| 777 | |
| 778 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 779 _summary_bytes_used += first_hr->used(); | |
| 780 _humongous_set.add(first_hr); | |
| 781 | |
| 782 return new_obj; | |
| 783 } | |
| 784 | |
| 342 | 785 // If could fit into free regions w/o expansion, try. |
| 786 // Otherwise, if can expand, do so. | |
| 787 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 788 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 789 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 790 | |
| 791 verify_region_sets_optional(); | |
| 342 | 792 |
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793 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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794 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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795 uint x_num = expansion_regions(); |
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796 uint fs = _hrs.free_suffix(); |
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797 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
| 3766 | 798 if (first == G1_NULL_HRS_INDEX) { |
| 2152 | 799 // The only thing we can do now is attempt expansion. |
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800 if (fs + x_num >= num_regions) { |
|
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801 // If the number of regions we're trying to allocate for this |
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802 // object is at most the number of regions in the free suffix, |
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803 // then the call to humongous_obj_allocate_find_first() above |
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804 // should have succeeded and we wouldn't be here. |
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805 // |
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806 // We should only be trying to expand when the free suffix is |
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807 // not sufficient for the object _and_ we have some expansion |
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808 // room available. |
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809 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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810 |
|
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811 ergo_verbose1(ErgoHeapSizing, |
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812 "attempt heap expansion", |
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813 ergo_format_reason("humongous allocation request failed") |
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814 ergo_format_byte("allocation request"), |
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815 word_size * HeapWordSize); |
|
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816 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
| 3766 | 817 // Even though the heap was expanded, it might not have |
| 818 // reached the desired size. So, we cannot assume that the | |
| 819 // allocation will succeed. | |
|
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820 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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821 } |
| 2152 | 822 } |
| 823 } | |
| 824 | |
| 2361 | 825 HeapWord* result = NULL; |
| 3766 | 826 if (first != G1_NULL_HRS_INDEX) { |
| 2361 | 827 result = |
| 828 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
| 829 assert(result != NULL, "it should always return a valid result"); | |
|
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830 |
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831 // A successful humongous object allocation changes the used space |
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832 // information of the old generation so we need to recalculate the |
|
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833 // sizes and update the jstat counters here. |
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|
834 g1mm()->update_sizes(); |
| 2152 | 835 } |
| 836 | |
| 837 verify_region_sets_optional(); | |
| 2361 | 838 |
| 839 return result; | |
| 342 | 840 } |
| 841 | |
| 1973 | 842 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 843 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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844 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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845 |
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846 unsigned int dummy_gc_count_before; |
|
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847 int dummy_gclocker_retry_count = 0; |
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848 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
| 342 | 849 } |
| 850 | |
| 851 HeapWord* | |
| 852 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 853 bool* gc_overhead_limit_was_exceeded) { |
| 854 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 855 |
| 10405 | 856 // Loop until the allocation is satisfied, or unsatisfied after GC. |
|
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857 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
| 1973 | 858 unsigned int gc_count_before; |
|
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859 |
|
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860 HeapWord* result = NULL; |
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861 if (!isHumongous(word_size)) { |
|
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862 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
|
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863 } else { |
|
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864 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
|
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865 } |
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866 if (result != NULL) { |
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|
867 return result; |
| 342 | 868 } |
| 869 | |
| 870 // Create the garbage collection operation... | |
| 1973 | 871 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 872 // ...and get the VM thread to execute it. |
| 873 VMThread::execute(&op); | |
| 1973 | 874 |
| 875 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 876 // If the operation was successful we'll return the result even | |
| 877 // if it is NULL. If the allocation attempt failed immediately | |
| 878 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 879 HeapWord* result = op.result(); | |
| 880 if (result != NULL && !isHumongous(word_size)) { | |
| 881 // Allocations that take place on VM operations do not do any | |
| 882 // card dirtying and we have to do it here. We only have to do | |
| 883 // this for non-humongous allocations, though. | |
| 884 dirty_young_block(result, word_size); | |
| 885 } | |
| 342 | 886 return result; |
| 1973 | 887 } else { |
|
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888 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
|
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|
889 return NULL; |
|
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|
890 } |
| 1973 | 891 assert(op.result() == NULL, |
| 892 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 893 } |
| 894 | |
| 895 // Give a warning if we seem to be looping forever. | |
| 896 if ((QueuedAllocationWarningCount > 0) && | |
| 897 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 898 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 899 } |
| 900 } | |
| 1973 | 901 |
| 902 ShouldNotReachHere(); | |
|
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|
903 return NULL; |
| 342 | 904 } |
| 905 | |
|
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|
906 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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|
907 unsigned int *gc_count_before_ret, |
|
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|
908 int* gclocker_retry_count_ret) { |
|
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909 // Make sure you read the note in attempt_allocation_humongous(). |
|
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|
910 |
|
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911 assert_heap_not_locked_and_not_at_safepoint(); |
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|
912 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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913 "be called for humongous allocation requests"); |
|
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914 |
|
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915 // We should only get here after the first-level allocation attempt |
|
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|
916 // (attempt_allocation()) failed to allocate. |
|
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917 |
|
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918 // We will loop until a) we manage to successfully perform the |
|
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|
919 // allocation or b) we successfully schedule a collection which |
|
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|
920 // fails to perform the allocation. b) is the only case when we'll |
|
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|
921 // return NULL. |
|
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|
922 HeapWord* result = NULL; |
|
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|
923 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
924 bool should_try_gc; |
|
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|
925 unsigned int gc_count_before; |
|
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926 |
|
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927 { |
|
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|
928 MutexLockerEx x(Heap_lock); |
|
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|
929 |
|
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|
930 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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|
931 false /* bot_updates */); |
|
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|
932 if (result != NULL) { |
|
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|
933 return result; |
|
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|
934 } |
|
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|
935 |
|
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|
936 // If we reach here, attempt_allocation_locked() above failed to |
|
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|
937 // allocate a new region. So the mutator alloc region should be NULL. |
|
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|
938 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
|
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|
939 |
|
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|
940 if (GC_locker::is_active_and_needs_gc()) { |
|
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941 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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|
942 // No need for an ergo verbose message here, |
|
20213c8a3c40
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|
943 // can_expand_young_list() does this when it returns true. |
|
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|
944 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
|
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|
945 false /* bot_updates */); |
|
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|
946 if (result != NULL) { |
|
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|
947 return result; |
|
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|
948 } |
|
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|
949 } |
|
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|
950 should_try_gc = false; |
|
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|
951 } else { |
|
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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|
952 // The GCLocker may not be active but the GCLocker initiated |
|
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|
953 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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|
954 // 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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|
955 // wait until the GCLocker initiated GC is performed, and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
956 // 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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|
957 if (GC_locker::needs_gc()) { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
958 should_try_gc = false; |
|
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959 } else { |
|
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|
960 // 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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|
961 gc_count_before = total_collections(); |
|
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|
962 should_try_gc = true; |
|
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|
963 } |
|
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|
964 } |
|
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|
965 } |
|
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|
966 |
|
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|
967 if (should_try_gc) { |
|
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|
968 bool succeeded; |
|
12113
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8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
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|
969 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
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|
970 GCCause::_g1_inc_collection_pause); |
|
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|
971 if (result != NULL) { |
|
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|
972 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
973 return result; |
|
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|
974 } |
|
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|
975 |
|
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|
976 if (succeeded) { |
|
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|
977 // If we get here we successfully scheduled a collection which |
|
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|
978 // failed to allocate. No point in trying to allocate |
|
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|
979 // further. We'll just return NULL. |
|
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|
980 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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|
981 *gc_count_before_ret = total_collections(); |
|
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|
982 return NULL; |
|
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|
983 } |
|
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|
984 } else { |
|
8853
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|
985 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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|
986 MutexLockerEx x(Heap_lock); |
|
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|
987 *gc_count_before_ret = total_collections(); |
|
2e093b564241
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|
988 return NULL; |
|
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|
989 } |
|
6106
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|
990 // The GCLocker is either active or the GCLocker initiated |
|
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|
991 // GC has not yet been performed. Stall until it is and |
|
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992 // then retry the allocation. |
|
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|
993 GC_locker::stall_until_clear(); |
|
8853
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|
994 (*gclocker_retry_count_ret) += 1; |
|
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|
995 } |
|
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|
996 |
| 10405 | 997 // We can reach here if we were unsuccessful in scheduling a |
|
2433
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|
998 // collection (because another thread beat us to it) or if we were |
|
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|
999 // stalled due to the GC locker. In either can we should retry the |
|
abdfc822206f
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|
1000 // allocation attempt in case another thread successfully |
|
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|
1001 // performed a collection and reclaimed enough space. We do the |
|
abdfc822206f
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|
1002 // first attempt (without holding the Heap_lock) here and the |
|
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|
1003 // follow-on attempt will be at the start of the next loop |
|
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|
1004 // iteration (after taking the Heap_lock). |
|
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|
1005 result = _mutator_alloc_region.attempt_allocation(word_size, |
|
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|
1006 false /* bot_updates */); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
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|
1007 if (result != NULL) { |
|
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|
1008 return result; |
|
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|
1009 } |
|
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|
1010 |
|
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|
1011 // Give a warning if we seem to be looping forever. |
|
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|
1012 if ((QueuedAllocationWarningCount > 0) && |
|
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|
1013 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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|
1014 warning("G1CollectedHeap::attempt_allocation_slow() " |
|
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|
1015 "retries %d times", try_count); |
|
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|
1016 } |
|
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|
1017 } |
|
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|
1018 |
|
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|
1019 ShouldNotReachHere(); |
|
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|
1020 return NULL; |
|
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|
1021 } |
|
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|
1022 |
|
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|
1023 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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|
1024 unsigned int * gc_count_before_ret, |
|
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|
1025 int* gclocker_retry_count_ret) { |
|
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|
1026 // The structure of this method has a lot of similarities to |
|
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|
1027 // attempt_allocation_slow(). The reason these two were not merged |
|
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|
1028 // into a single one is that such a method would require several "if |
|
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|
1029 // allocation is not humongous do this, otherwise do that" |
|
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|
1030 // conditional paths which would obscure its flow. In fact, an early |
|
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|
1031 // version of this code did use a unified method which was harder to |
|
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|
1032 // follow and, as a result, it had subtle bugs that were hard to |
|
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|
1033 // track down. So keeping these two methods separate allows each to |
|
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|
1034 // be more readable. It will be good to keep these two in sync as |
|
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|
1035 // much as possible. |
|
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|
1036 |
|
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|
1037 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
1038 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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|
1039 "should only be called for humongous allocations"); |
|
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|
1040 |
|
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1041 // 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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|
1042 // 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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|
1043 // 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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|
1044 // 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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|
1045 // allocated memory while we do a GC. |
|
4910
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|
1046 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
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|
1047 word_size)) { |
|
4834
6a78aa6ac1ff
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|
1048 collect(GCCause::_g1_humongous_allocation); |
|
6a78aa6ac1ff
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|
1049 } |
|
6a78aa6ac1ff
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|
1050 |
|
2433
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|
1051 // We will loop until a) we manage to successfully perform the |
|
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|
1052 // allocation or b) we successfully schedule a collection which |
|
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|
1053 // fails to perform the allocation. b) is the only case when we'll |
|
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|
1054 // return NULL. |
|
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|
1055 HeapWord* result = NULL; |
|
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|
1056 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
1057 bool should_try_gc; |
|
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1058 unsigned int gc_count_before; |
|
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1059 |
|
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1060 { |
|
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1061 MutexLockerEx x(Heap_lock); |
|
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1062 |
|
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1063 // Given that humongous objects are not allocated in young |
|
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1064 // regions, we'll first try to do the allocation without doing a |
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1065 // collection hoping that there's enough space in the heap. |
|
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1066 result = humongous_obj_allocate(word_size); |
|
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1067 if (result != NULL) { |
|
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1068 return result; |
|
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1069 } |
|
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1070 |
|
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1071 if (GC_locker::is_active_and_needs_gc()) { |
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1072 should_try_gc = false; |
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1073 } else { |
|
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1074 // The GCLocker may not be active but the GCLocker initiated |
|
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1075 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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1076 // returns true). In this case we do not try this GC and |
|
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1077 // wait until the GCLocker initiated GC is performed, and |
|
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1078 // then retry the allocation. |
|
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1079 if (GC_locker::needs_gc()) { |
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1080 should_try_gc = false; |
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1081 } else { |
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1082 // Read the GC count while still holding the Heap_lock. |
|
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1083 gc_count_before = total_collections(); |
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1084 should_try_gc = true; |
|
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1085 } |
|
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1086 } |
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1087 } |
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1088 |
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1089 if (should_try_gc) { |
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1090 // If we failed to allocate the humongous object, we should try to |
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1091 // do a collection pause (if we're allowed) in case it reclaims |
|
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1092 // enough space for the allocation to succeed after the pause. |
|
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1093 |
|
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1094 bool succeeded; |
|
12113
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1095 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
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1096 GCCause::_g1_humongous_allocation); |
|
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1097 if (result != NULL) { |
|
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1098 assert(succeeded, "only way to get back a non-NULL result"); |
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1099 return result; |
|
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1100 } |
|
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1101 |
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1102 if (succeeded) { |
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1103 // If we get here we successfully scheduled a collection which |
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1104 // failed to allocate. No point in trying to allocate |
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1105 // further. We'll just return NULL. |
|
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1106 MutexLockerEx x(Heap_lock); |
|
4910
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1107 *gc_count_before_ret = total_collections(); |
|
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1108 return NULL; |
|
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1109 } |
|
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1110 } else { |
|
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1111 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
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1112 MutexLockerEx x(Heap_lock); |
|
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1113 *gc_count_before_ret = total_collections(); |
|
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1114 return NULL; |
|
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1115 } |
|
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1116 // The GCLocker is either active or the GCLocker initiated |
|
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1117 // GC has not yet been performed. Stall until it is and |
|
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1118 // then retry the allocation. |
|
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1119 GC_locker::stall_until_clear(); |
|
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1120 (*gclocker_retry_count_ret) += 1; |
|
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1121 } |
|
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1122 |
| 10405 | 1123 // We can reach here if we were unsuccessful in scheduling a |
|
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1124 // collection (because another thread beat us to it) or if we were |
|
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1125 // stalled due to the GC locker. In either can we should retry the |
|
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1126 // allocation attempt in case another thread successfully |
|
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1127 // performed a collection and reclaimed enough space. Give a |
|
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1128 // warning if we seem to be looping forever. |
|
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1129 |
|
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1130 if ((QueuedAllocationWarningCount > 0) && |
|
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1131 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1132 warning("G1CollectedHeap::attempt_allocation_humongous() " |
|
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1133 "retries %d times", try_count); |
|
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1134 } |
|
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1135 } |
|
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1136 |
|
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|
1137 ShouldNotReachHere(); |
|
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1138 return NULL; |
|
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|
1139 } |
|
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1140 |
|
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1141 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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1142 bool expect_null_mutator_alloc_region) { |
| 2152 | 1143 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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1144 assert(_mutator_alloc_region.get() == NULL || |
|
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1145 !expect_null_mutator_alloc_region, |
|
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1146 "the current alloc region was unexpectedly found to be non-NULL"); |
|
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1147 |
|
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1148 if (!isHumongous(word_size)) { |
|
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1149 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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1150 false /* bot_updates */); |
|
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1151 } else { |
|
4829
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1152 HeapWord* result = humongous_obj_allocate(word_size); |
|
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1153 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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1154 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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|
1155 } |
|
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|
1156 return result; |
|
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|
1157 } |
|
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|
1158 |
|
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|
1159 ShouldNotReachHere(); |
| 342 | 1160 } |
| 1161 | |
| 1162 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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1163 G1CollectedHeap* _g1h; |
| 342 | 1164 ModRefBarrierSet* _mr_bs; |
| 1165 public: | |
|
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1166 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
| 12080 | 1167 _g1h(g1h), _mr_bs(mr_bs) {} |
| 1168 | |
| 342 | 1169 bool doHeapRegion(HeapRegion* r) { |
| 12080 | 1170 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1171 | |
|
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1172 if (r->continuesHumongous()) { |
| 12080 | 1173 // We'll assert that the strong code root list and RSet is empty |
| 1174 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
| 1175 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
| 342 | 1176 return false; |
|
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1177 } |
| 12080 | 1178 |
|
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1179 _g1h->reset_gc_time_stamps(r); |
| 12080 | 1180 hrrs->clear(); |
| 342 | 1181 // You might think here that we could clear just the cards |
| 1182 // corresponding to the used region. But no: if we leave a dirty card | |
| 1183 // in a region we might allocate into, then it would prevent that card | |
| 1184 // from being enqueued, and cause it to be missed. | |
| 1185 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1186 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 12080 | 1187 |
| 342 | 1188 return false; |
| 1189 } | |
| 1190 }; | |
| 1191 | |
|
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1192 void G1CollectedHeap::clear_rsets_post_compaction() { |
| 12343 | 1193 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
|
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1194 heap_region_iterate(&rs_clear); |
|
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1195 } |
| 342 | 1196 |
|
626
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1197 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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|
1198 G1CollectedHeap* _g1h; |
|
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1199 UpdateRSOopClosure _cl; |
|
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1200 int _worker_i; |
|
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1201 public: |
|
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1202 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1203 _cl(g1->g1_rem_set(), worker_i), |
|
626
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1204 _worker_i(worker_i), |
|
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1205 _g1h(g1) |
|
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|
1206 { } |
|
1960
878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
johnc
parents:
1883
diff
changeset
|
1207 |
|
626
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|
1208 bool doHeapRegion(HeapRegion* r) { |
|
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1209 if (!r->continuesHumongous()) { |
|
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|
1210 _cl.set_from(r); |
|
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|
1211 r->oop_iterate(&_cl); |
|
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1212 } |
|
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1213 return false; |
|
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1214 } |
|
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1215 }; |
|
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1216 |
|
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1217 class ParRebuildRSTask: public AbstractGangTask { |
|
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1218 G1CollectedHeap* _g1; |
|
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1219 public: |
|
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1220 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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1221 : AbstractGangTask("ParRebuildRSTask"), |
|
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1222 _g1(g1) |
|
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1223 { } |
|
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1224 |
|
4728
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7121618: Change type of number of GC workers to unsigned int.
jmasa
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changeset
|
1225 void work(uint worker_id) { |
|
441e946dc1af
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1226 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
441e946dc1af
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|
1227 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
bca17e38de00
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|
1228 _g1->workers()->active_workers(), |
|
626
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1229 HeapRegion::RebuildRSClaimValue); |
|
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1230 } |
|
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1231 }; |
|
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1232 |
|
3778
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1233 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
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1234 private: |
|
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1235 G1HRPrinter* _hr_printer; |
|
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1236 public: |
|
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|
1237 bool doHeapRegion(HeapRegion* hr) { |
|
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1238 assert(!hr->is_young(), "not expecting to find young regions"); |
|
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1239 // We only generate output for non-empty regions. |
|
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1240 if (!hr->is_empty()) { |
|
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1241 if (!hr->isHumongous()) { |
|
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1242 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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1243 } else if (hr->startsHumongous()) { |
|
6254
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1244 if (hr->region_num() == 1) { |
|
3778
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1245 // single humongous region |
|
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|
1246 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
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|
1247 } else { |
|
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|
1248 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
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|
1249 } |
|
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|
1250 } else { |
|
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|
1251 assert(hr->continuesHumongous(), "only way to get here"); |
|
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|
1252 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
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|
1253 } |
|
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|
1254 } |
|
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|
1255 return false; |
|
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|
1256 } |
|
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|
1257 |
|
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|
1258 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
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|
1259 : _hr_printer(hr_printer) { } |
|
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|
1260 }; |
|
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|
1261 |
|
6254
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|
1262 void G1CollectedHeap::print_hrs_post_compaction() { |
|
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|
1263 PostCompactionPrinterClosure cl(hr_printer()); |
|
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|
1264 heap_region_iterate(&cl); |
|
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|
1265 } |
|
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|
1266 |
| 1973 | 1267 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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|
1268 bool clear_all_soft_refs, |
| 342 | 1269 size_t word_size) { |
| 2152 | 1270 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1271 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1272 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1273 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
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1313
diff
changeset
|
1274 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
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1313
diff
changeset
|
1275 |
| 10405 | 1276 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
|
1277 gc_timer->register_gc_start(); |
| 10405 | 1278 |
| 1279 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
| 1280 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
| 1281 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1282 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1283 ResourceMark rm; |
| 1284 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
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diff
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|
1285 print_heap_before_gc(); |
| 10405 | 1286 trace_heap_before_gc(gc_tracer); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1287 |
|
17866
270d7cb38f40
8038934: Remove prefix allocated_ from methods and variables in Metaspace
ehelin
parents:
17844
diff
changeset
|
1288 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
6629
diff
changeset
|
1289 |
| 2152 | 1290 verify_region_sets_optional(); |
| 342 | 1291 |
|
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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diff
changeset
|
1292 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
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1360
diff
changeset
|
1293 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
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1360
diff
changeset
|
1294 |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1295 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
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1360
diff
changeset
|
1296 |
| 342 | 1297 { |
| 1298 IsGCActiveMark x; | |
| 1299 | |
| 1300 // Timing | |
| 6030 | 1301 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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|
1302 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
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|
1303 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1304 |
| 342 | 1305 { |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
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17992
diff
changeset
|
1306 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL, gc_tracer->gc_id()); |
|
10098
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|
1307 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
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|
1308 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
71013d764f6e
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|
1309 |
|
71013d764f6e
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changeset
|
1310 double start = os::elapsedTime(); |
|
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|
1311 g1_policy()->record_full_collection_start(); |
|
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|
1312 |
|
71013d764f6e
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|
1313 // Note: When we have a more flexible GC logging framework that |
|
71013d764f6e
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|
1314 // allows us to add optional attributes to a GC log record we |
|
71013d764f6e
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|
1315 // could consider timing and reporting how long we wait in the |
|
71013d764f6e
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changeset
|
1316 // following two methods. |
|
71013d764f6e
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changeset
|
1317 wait_while_free_regions_coming(); |
|
71013d764f6e
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|
1318 // If we start the compaction before the CM threads finish |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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|
1319 // scanning the root regions we might trip them over as we'll |
|
71013d764f6e
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changeset
|
1320 // be moving objects / updating references. So let's wait until |
|
71013d764f6e
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|
1321 // they are done. By telling them to abort, they should complete |
|
71013d764f6e
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|
1322 // early. |
|
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|
1323 _cm->root_regions()->abort(); |
|
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|
1324 _cm->root_regions()->wait_until_scan_finished(); |
|
71013d764f6e
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|
1325 append_secondary_free_list_if_not_empty_with_lock(); |
|
71013d764f6e
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|
1326 |
|
71013d764f6e
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changeset
|
1327 gc_prologue(true); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1328 increment_total_collections(true /* full gc */); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1329 increment_old_marking_cycles_started(); |
|
71013d764f6e
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changeset
|
1330 |
|
71013d764f6e
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changeset
|
1331 assert(used() == recalculate_used(), "Should be equal"); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
changeset
|
1332 |
|
71013d764f6e
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diff
changeset
|
1333 verify_before_gc(); |
|
71013d764f6e
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|
1334 |
| 10405 | 1335 pre_full_gc_dump(gc_timer); |
|
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1336 |
|
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1337 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
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1338 |
|
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1339 // Disable discovery and empty the discovered lists |
|
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1340 // for the CM ref processor. |
|
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1341 ref_processor_cm()->disable_discovery(); |
|
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1342 ref_processor_cm()->abandon_partial_discovery(); |
|
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1343 ref_processor_cm()->verify_no_references_recorded(); |
|
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1344 |
|
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1345 // Abandon current iterations of concurrent marking and concurrent |
|
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1346 // refinement, if any are in progress. We have to do this before |
|
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1347 // wait_until_scan_finished() below. |
|
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1348 concurrent_mark()->abort(); |
|
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1349 |
|
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1350 // Make sure we'll choose a new allocation region afterwards. |
|
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1351 release_mutator_alloc_region(); |
|
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1352 abandon_gc_alloc_regions(); |
|
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1353 g1_rem_set()->cleanupHRRS(); |
|
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1354 |
|
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1355 // We should call this after we retire any currently active alloc |
|
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1356 // regions so that all the ALLOC / RETIRE events are generated |
|
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1357 // before the start GC event. |
|
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1358 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
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1359 |
|
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1360 // We may have added regions to the current incremental collection |
|
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1361 // set between the last GC or pause and now. We need to clear the |
|
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1362 // incremental collection set and then start rebuilding it afresh |
|
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1363 // after this full GC. |
|
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1364 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
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1365 g1_policy()->clear_incremental_cset(); |
|
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1366 g1_policy()->stop_incremental_cset_building(); |
|
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1367 |
|
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1368 tear_down_region_sets(false /* free_list_only */); |
|
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1369 g1_policy()->set_gcs_are_young(true); |
|
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1370 |
|
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1371 // See the comments in g1CollectedHeap.hpp and |
|
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1372 // G1CollectedHeap::ref_processing_init() about |
|
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1373 // how reference processing currently works in G1. |
|
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1374 |
|
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1375 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
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1376 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
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1377 |
|
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1378 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
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1379 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
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|
1380 |
|
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1381 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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1382 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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1383 |
|
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|
1384 // Do collection work |
|
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|
1385 { |
|
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|
1386 HandleMark hm; // Discard invalid handles created during gc |
|
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|
1387 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
|
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|
1388 } |
|
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|
1389 |
|
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1390 assert(free_regions() == 0, "we should not have added any free regions"); |
|
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|
1391 rebuild_region_sets(false /* free_list_only */); |
|
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1392 |
|
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1393 // Enqueue any discovered reference objects that have |
|
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1394 // not been removed from the discovered lists. |
|
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|
1395 ref_processor_stw()->enqueue_discovered_references(); |
|
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|
1396 |
|
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|
1397 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
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|
1398 |
|
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|
1399 MemoryService::track_memory_usage(); |
|
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1400 |
|
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1401 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
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|
1402 ref_processor_stw()->verify_no_references_recorded(); |
|
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1403 |
|
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|
1404 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
|
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|
1405 ClassLoaderDataGraph::purge(); |
| 12080 | 1406 MetaspaceAux::verify_metrics(); |
|
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1407 |
|
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1408 // Note: since we've just done a full GC, concurrent |
|
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1409 // marking is no longer active. Therefore we need not |
|
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1410 // re-enable reference discovery for the CM ref processor. |
|
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1411 // That will be done at the start of the next marking cycle. |
|
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1412 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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|
1413 ref_processor_cm()->verify_no_references_recorded(); |
|
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1414 |
|
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|
1415 reset_gc_time_stamp(); |
|
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1416 // Since everything potentially moved, we will clear all remembered |
| 10405 | 1417 // sets, and clear all cards. Later we will rebuild remembered |
|
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1418 // sets. We will also reset the GC time stamps of the regions. |
|
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|
1419 clear_rsets_post_compaction(); |
|
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|
1420 check_gc_time_stamps(); |
|
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|
1421 |
|
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|
1422 // Resize the heap if necessary. |
|
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|
1423 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
|
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1424 |
|
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|
1425 if (_hr_printer.is_active()) { |
|
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1426 // We should do this after we potentially resize the heap so |
|
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1427 // that all the COMMIT / UNCOMMIT events are generated before |
|
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1428 // the end GC event. |
|
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|
1429 |
|
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|
1430 print_hrs_post_compaction(); |
|
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|
1431 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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|
1432 } |
|
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|
1433 |
|
10246
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|
1434 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
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|
1435 if (hot_card_cache->use_cache()) { |
|
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|
1436 hot_card_cache->reset_card_counts(); |
|
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|
1437 hot_card_cache->reset_hot_cache(); |
|
10098
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|
1438 } |
|
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|
1439 |
|
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|
1440 // Rebuild remembered sets of all regions. |
|
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|
1441 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
1442 uint n_workers = |
|
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|
1443 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1444 workers()->active_workers(), |
|
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|
1445 Threads::number_of_non_daemon_threads()); |
|
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|
1446 assert(UseDynamicNumberOfGCThreads || |
|
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|
1447 n_workers == workers()->total_workers(), |
|
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|
1448 "If not dynamic should be using all the workers"); |
|
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|
1449 workers()->set_active_workers(n_workers); |
|
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|
1450 // Set parallel threads in the heap (_n_par_threads) only |
|
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|
1451 // before a parallel phase and always reset it to 0 after |
|
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|
1452 // the phase so that the number of parallel threads does |
|
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|
1453 // no get carried forward to a serial phase where there |
|
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|
1454 // may be code that is "possibly_parallel". |
|
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|
1455 set_par_threads(n_workers); |
|
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|
1456 |
|
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|
1457 ParRebuildRSTask rebuild_rs_task(this); |
|
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|
1458 assert(check_heap_region_claim_values( |
|
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|
1459 HeapRegion::InitialClaimValue), "sanity check"); |
|
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|
1460 assert(UseDynamicNumberOfGCThreads || |
|
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|
1461 workers()->active_workers() == workers()->total_workers(), |
|
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|
1462 "Unless dynamic should use total workers"); |
|
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|
1463 // Use the most recent number of active workers |
|
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|
1464 assert(workers()->active_workers() > 0, |
|
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|
1465 "Active workers not properly set"); |
|
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|
1466 set_par_threads(workers()->active_workers()); |
|
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|
1467 workers()->run_task(&rebuild_rs_task); |
|
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|
1468 set_par_threads(0); |
|
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|
1469 assert(check_heap_region_claim_values( |
|
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|
1470 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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|
1471 reset_heap_region_claim_values(); |
|
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|
1472 } else { |
|
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|
1473 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1474 heap_region_iterate(&rebuild_rs); |
|
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|
1475 } |
|
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|
1476 |
| 12080 | 1477 // Rebuild the strong code root lists for each region |
| 1478 rebuild_strong_code_roots(); | |
| 1479 | |
|
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|
1480 if (true) { // FIXME |
|
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|
1481 MetaspaceGC::compute_new_size(); |
|
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|
1482 } |
| 342 | 1483 |
|
546
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6690928: Use spinning in combination with yields for workstealing termination.
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diff
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|
1484 #ifdef TRACESPINNING |
|
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|
1485 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
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diff
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|
1486 #endif |
|
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diff
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|
1487 |
|
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|
1488 // Discard all rset updates |
|
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|
1489 JavaThread::dirty_card_queue_set().abandon_logs(); |
|
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|
1490 assert(!G1DeferredRSUpdate |
|
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|
1491 || (G1DeferredRSUpdate && |
|
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|
1492 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
|
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|
1493 |
|
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|
1494 _young_list->reset_sampled_info(); |
|
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|
1495 // At this point there should be no regions in the |
|
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|
1496 // entire heap tagged as young. |
|
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|
1497 assert(check_young_list_empty(true /* check_heap */), |
|
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|
1498 "young list should be empty at this point"); |
|
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|
1499 |
|
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|
1500 // Update the number of full collections that have been completed. |
|
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|
1501 increment_old_marking_cycles_completed(false /* concurrent */); |
|
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|
1502 |
|
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|
1503 _hrs.verify_optional(); |
|
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|
1504 verify_region_sets_optional(); |
|
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|
1505 |
|
10373
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|
1506 verify_after_gc(); |
|
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|
1507 |
|
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|
1508 // Start a new incremental collection set for the next pause |
|
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|
1509 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
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|
1510 g1_policy()->start_incremental_cset_building(); |
|
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|
1511 |
|
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|
1512 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
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|
1513 // regions to the incremental collection set for the next |
|
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|
1514 // evacuation pause. |
|
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|
1515 clear_cset_fast_test(); |
|
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|
1516 |
|
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|
1517 init_mutator_alloc_region(); |
|
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|
1518 |
|
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|
1519 double end = os::elapsedTime(); |
|
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|
1520 g1_policy()->record_full_collection_end(); |
|
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|
1521 |
|
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|
1522 if (G1Log::fine()) { |
|
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|
1523 g1_policy()->print_heap_transition(); |
|
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|
1524 } |
|
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|
1525 |
|
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|
1526 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
|
71013d764f6e
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|
1527 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
|
71013d764f6e
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|
1528 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
|
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|
1529 // before any GC notifications are raised. |
|
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|
1530 g1mm()->update_sizes(); |
|
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|
1531 |
|
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|
1532 gc_epilogue(true); |
|
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|
1533 } |
|
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|
1534 |
|
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|
1535 if (G1Log::finer()) { |
|
10291
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
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diff
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|
1536 g1_policy()->print_detailed_heap_transition(true /* full */); |
|
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|
1537 } |
|
6121
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diff
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|
1538 |
|
b9442ac22f59
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|
1539 print_heap_after_gc(); |
| 10405 | 1540 trace_heap_after_gc(gc_tracer); |
| 1541 | |
| 1542 post_full_gc_dump(gc_timer); | |
| 1543 | |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
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13062
diff
changeset
|
1544 gc_timer->register_gc_end(); |
| 10405 | 1545 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
|
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|
1546 } |
| 1973 | 1547 |
| 1548 return true; | |
| 342 | 1549 } |
| 1550 | |
| 1551 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1552 // do_collection() will return whether it succeeded in performing |
| 1553 // the GC. Currently, there is no facility on the | |
| 1554 // do_full_collection() API to notify the caller than the collection | |
| 1555 // did not succeed (e.g., because it was locked out by the GC | |
| 1556 // locker). So, right now, we'll ignore the return value. | |
| 1557 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1558 clear_all_soft_refs, | |
| 1559 0 /* word_size */); | |
| 342 | 1560 } |
| 1561 | |
| 1562 // This code is mostly copied from TenuredGeneration. | |
| 1563 void | |
| 1564 G1CollectedHeap:: | |
| 1565 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1566 // Include the current allocation, if any, and bytes that will be | |
| 1567 // pre-allocated to support collections, as "used". | |
| 1568 const size_t used_after_gc = used(); | |
| 1569 const size_t capacity_after_gc = capacity(); | |
| 1570 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1571 | |
|
1717
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|
1572 // This is enforced in arguments.cpp. |
|
688c3755d7af
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changeset
|
1573 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
|
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|
1574 "otherwise the code below doesn't make sense"); |
|
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|
1575 |
| 342 | 1576 // We don't have floating point command-line arguments |
|
1717
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|
1577 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1578 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
1717
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|
1579 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1580 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1581 | |
|
1717
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|
1582 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
|
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|
1583 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
|
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|
1584 |
|
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changeset
|
1585 // We have to be careful here as these two calculations can overflow |
|
688c3755d7af
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|
1586 // 32-bit size_t's. |
|
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|
1587 double used_after_gc_d = (double) used_after_gc; |
|
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|
1588 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
|
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changeset
|
1589 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
|
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|
1590 |
|
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diff
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|
1591 // Let's make sure that they are both under the max heap size, which |
|
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changeset
|
1592 // by default will make them fit into a size_t. |
|
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diff
changeset
|
1593 double desired_capacity_upper_bound = (double) max_heap_size; |
|
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changeset
|
1594 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
|
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|
1595 desired_capacity_upper_bound); |
|
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|
1596 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
|
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|
1597 desired_capacity_upper_bound); |
|
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1598 |
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1599 // We can now safely turn them into size_t's. |
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1600 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1601 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1602 |
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1603 // This assert only makes sense here, before we adjust them |
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1604 // with respect to the min and max heap size. |
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1605 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1606 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1607 "maximum_desired_capacity = "SIZE_FORMAT, |
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1608 minimum_desired_capacity, maximum_desired_capacity)); |
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1609 |
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1610 // Should not be greater than the heap max size. No need to adjust |
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1611 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1612 // we'll try to make the capacity larger than it, not smaller). |
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1613 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1614 // Should not be less than the heap min size. No need to adjust it |
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1615 // with respect to the heap max size as it's an upper bound (i.e., |
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1616 // we'll try to make the capacity smaller than it, not greater). |
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1617 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1618 |
|
1717
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1619 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1620 // Don't expand unless it's significant |
| 1621 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1622 ergo_verbose4(ErgoHeapSizing, |
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1623 "attempt heap expansion", |
|
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1624 ergo_format_reason("capacity lower than " |
|
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1625 "min desired capacity after Full GC") |
|
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1626 ergo_format_byte("capacity") |
|
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1627 ergo_format_byte("occupancy") |
|
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1628 ergo_format_byte_perc("min desired capacity"), |
|
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1629 capacity_after_gc, used_after_gc, |
|
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1630 minimum_desired_capacity, (double) MinHeapFreeRatio); |
|
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1631 expand(expand_bytes); |
| 342 | 1632 |
| 1633 // No expansion, now see if we want to shrink | |
|
1717
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1634 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1635 // Capacity too large, compute shrinking size |
| 1636 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1637 ergo_verbose4(ErgoHeapSizing, |
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1638 "attempt heap shrinking", |
|
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1639 ergo_format_reason("capacity higher than " |
|
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1640 "max desired capacity after Full GC") |
|
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1641 ergo_format_byte("capacity") |
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1642 ergo_format_byte("occupancy") |
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1643 ergo_format_byte_perc("max desired capacity"), |
|
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1644 capacity_after_gc, used_after_gc, |
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|
1645 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1646 shrink(shrink_bytes); |
| 1647 } | |
| 1648 } | |
| 1649 | |
| 1650 | |
| 1651 HeapWord* | |
| 1973 | 1652 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1653 bool* succeeded) { | |
| 2152 | 1654 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1655 |
| 1656 *succeeded = true; | |
| 1657 // Let's attempt the allocation first. | |
|
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1658 HeapWord* result = |
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1659 attempt_allocation_at_safepoint(word_size, |
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1660 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1661 if (result != NULL) { |
| 1662 assert(*succeeded, "sanity"); | |
| 1663 return result; | |
| 1664 } | |
| 342 | 1665 |
| 1666 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1667 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1668 // expansion over collection. (This might change in the future if we can | |
| 1669 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1670 result = expand_and_allocate(word_size); | |
| 1671 if (result != NULL) { | |
| 1973 | 1672 assert(*succeeded, "sanity"); |
| 342 | 1673 return result; |
| 1674 } | |
| 1675 | |
| 1973 | 1676 // Expansion didn't work, we'll try to do a Full GC. |
| 1677 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1678 false, /* clear_all_soft_refs */ | |
| 1679 word_size); | |
| 1680 if (!gc_succeeded) { | |
| 1681 *succeeded = false; | |
| 1682 return NULL; | |
| 1683 } | |
| 1684 | |
| 1685 // Retry the allocation | |
| 1686 result = attempt_allocation_at_safepoint(word_size, | |
|
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1687 true /* expect_null_mutator_alloc_region */); |
| 342 | 1688 if (result != NULL) { |
| 1973 | 1689 assert(*succeeded, "sanity"); |
| 342 | 1690 return result; |
| 1691 } | |
| 1692 | |
| 1973 | 1693 // Then, try a Full GC that will collect all soft references. |
| 1694 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1695 true, /* clear_all_soft_refs */ | |
| 1696 word_size); | |
| 1697 if (!gc_succeeded) { | |
| 1698 *succeeded = false; | |
| 1699 return NULL; | |
| 1700 } | |
| 1701 | |
| 1702 // Retry the allocation once more | |
| 1703 result = attempt_allocation_at_safepoint(word_size, | |
|
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1704 true /* expect_null_mutator_alloc_region */); |
| 342 | 1705 if (result != NULL) { |
| 1973 | 1706 assert(*succeeded, "sanity"); |
| 342 | 1707 return result; |
| 1708 } | |
| 1709 | |
|
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1710 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1711 "Flag should have been handled and cleared prior to this point"); |
|
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1712 |
| 342 | 1713 // What else? We might try synchronous finalization later. If the total |
| 1714 // space available is large enough for the allocation, then a more | |
| 1715 // complete compaction phase than we've tried so far might be | |
| 1716 // appropriate. | |
| 1973 | 1717 assert(*succeeded, "sanity"); |
| 342 | 1718 return NULL; |
| 1719 } | |
| 1720 | |
| 1721 // Attempting to expand the heap sufficiently | |
| 1722 // to support an allocation of the given "word_size". If | |
| 1723 // successful, perform the allocation and return the address of the | |
| 1724 // allocated block, or else "NULL". | |
| 1725 | |
| 1726 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1727 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1728 | |
| 1729 verify_region_sets_optional(); | |
| 1973 | 1730 |
|
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1731 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1732 ergo_verbose1(ErgoHeapSizing, |
|
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1733 "attempt heap expansion", |
|
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1734 ergo_format_reason("allocation request failed") |
|
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1735 ergo_format_byte("allocation request"), |
|
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1736 word_size * HeapWordSize); |
|
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1737 if (expand(expand_bytes)) { |
| 3766 | 1738 _hrs.verify_optional(); |
|
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1739 verify_region_sets_optional(); |
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1740 return attempt_allocation_at_safepoint(word_size, |
|
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1741 false /* expect_null_mutator_alloc_region */); |
|
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1742 } |
|
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1743 return NULL; |
| 342 | 1744 } |
| 1745 | |
| 3766 | 1746 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
| 1747 HeapWord* new_end) { | |
| 1748 assert(old_end != new_end, "don't call this otherwise"); | |
| 1749 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
| 1750 | |
| 1751 // Update the committed mem region. | |
| 1752 _g1_committed.set_end(new_end); | |
| 1753 // Tell the card table about the update. | |
| 1754 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
| 1755 // Tell the BOT about the update. | |
| 1756 _bot_shared->resize(_g1_committed.word_size()); | |
|
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1757 // Tell the hot card cache about the update |
|
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1758 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
| 3766 | 1759 } |
| 1760 | |
|
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1761 bool G1CollectedHeap::expand(size_t expand_bytes) { |
|
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1762 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1763 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1764 HeapRegion::GrainBytes); | |
|
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1765 ergo_verbose2(ErgoHeapSizing, |
|
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1766 "expand the heap", |
|
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1767 ergo_format_byte("requested expansion amount") |
|
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|
1768 ergo_format_byte("attempted expansion amount"), |
|
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|
1769 expand_bytes, aligned_expand_bytes); |
|
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1770 |
|
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1771 if (_g1_storage.uncommitted_size() == 0) { |
|
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1772 ergo_verbose0(ErgoHeapSizing, |
|
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1773 "did not expand the heap", |
|
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1774 ergo_format_reason("heap already fully expanded")); |
|
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|
1775 return false; |
|
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|
1776 } |
|
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1777 |
| 3766 | 1778 // First commit the memory. |
| 1779 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
|
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1780 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
|
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1781 if (successful) { |
| 3766 | 1782 // Then propagate this update to the necessary data structures. |
| 1783 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
| 1784 update_committed_space(old_end, new_end); | |
| 1785 | |
| 1786 FreeRegionList expansion_list("Local Expansion List"); | |
| 1787 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
| 1788 assert(mr.start() == old_end, "post-condition"); | |
| 1789 // mr might be a smaller region than what was requested if | |
| 1790 // expand_by() was unable to allocate the HeapRegion instances | |
| 1791 assert(mr.end() <= new_end, "post-condition"); | |
| 1792 | |
| 1793 size_t actual_expand_bytes = mr.byte_size(); | |
| 1794 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
| 1795 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
| 1796 "post-condition"); | |
| 1797 if (actual_expand_bytes < aligned_expand_bytes) { | |
| 1798 // We could not expand _hrs to the desired size. In this case we | |
| 1799 // need to shrink the committed space accordingly. | |
| 1800 assert(mr.end() < new_end, "invariant"); | |
| 1801 | |
| 1802 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
| 1803 // First uncommit the memory. | |
| 1804 _g1_storage.shrink_by(diff_bytes); | |
| 1805 // Then propagate this update to the necessary data structures. | |
| 1806 update_committed_space(new_end, mr.end()); | |
|
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|
1807 } |
| 3766 | 1808 _free_list.add_as_tail(&expansion_list); |
|
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1809 |
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1810 if (_hr_printer.is_active()) { |
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1811 HeapWord* curr = mr.start(); |
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1812 while (curr < mr.end()) { |
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1813 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1814 _hr_printer.commit(curr, curr_end); |
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1815 curr = curr_end; |
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1816 } |
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1817 assert(curr == mr.end(), "post-condition"); |
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1818 } |
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1819 g1_policy()->record_new_heap_size(n_regions()); |
|
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1820 } else { |
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1821 ergo_verbose0(ErgoHeapSizing, |
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1822 "did not expand the heap", |
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1823 ergo_format_reason("heap expansion operation failed")); |
|
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1824 // The expansion of the virtual storage space was unsuccessful. |
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1825 // Let's see if it was because we ran out of swap. |
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1826 if (G1ExitOnExpansionFailure && |
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1827 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1828 // We had head room... |
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1829 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
| 342 | 1830 } |
| 1831 } | |
|
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1832 return successful; |
| 342 | 1833 } |
| 1834 | |
| 3766 | 1835 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1836 size_t aligned_shrink_bytes = |
| 1837 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1838 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1839 HeapRegion::GrainBytes); | |
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1840 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1841 |
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1842 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
| 3766 | 1843 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
|
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1844 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1845 |
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1846 ergo_verbose3(ErgoHeapSizing, |
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1847 "shrink the heap", |
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1848 ergo_format_byte("requested shrinking amount") |
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1849 ergo_format_byte("aligned shrinking amount") |
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1850 ergo_format_byte("attempted shrinking amount"), |
|
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1851 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1852 if (num_regions_removed > 0) { |
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1853 _g1_storage.shrink_by(shrunk_bytes); |
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1854 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1855 |
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1856 if (_hr_printer.is_active()) { |
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1857 HeapWord* curr = old_end; |
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1858 while (curr > new_end) { |
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1859 HeapWord* curr_end = curr; |
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1860 curr -= HeapRegion::GrainWords; |
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1861 _hr_printer.uncommit(curr, curr_end); |
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1862 } |
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1863 } |
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1864 |
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1865 _expansion_regions += num_regions_removed; |
| 3766 | 1866 update_committed_space(old_end, new_end); |
| 1867 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1868 g1_policy()->record_new_heap_size(n_regions()); |
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1869 } else { |
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1870 ergo_verbose0(ErgoHeapSizing, |
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1871 "did not shrink the heap", |
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1872 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1873 } |
| 1874 } | |
| 1875 | |
| 1876 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1877 verify_region_sets_optional(); |
| 1878 | |
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1879 // We should only reach here at the end of a Full GC which means we |
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1880 // should not not be holding to any GC alloc regions. The method |
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1881 // below will make sure of that and do any remaining clean up. |
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1882 abandon_gc_alloc_regions(); |
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1883 |
| 2152 | 1884 // Instead of tearing down / rebuilding the free lists here, we |
| 1885 // could instead use the remove_all_pending() method on free_list to | |
| 1886 // remove only the ones that we need to remove. | |
| 4072 | 1887 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1888 shrink_helper(shrink_bytes); |
| 4072 | 1889 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1890 |
| 3766 | 1891 _hrs.verify_optional(); |
| 2152 | 1892 verify_region_sets_optional(); |
| 342 | 1893 } |
| 1894 | |
| 1895 // Public methods. | |
| 1896 | |
| 1897 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1898 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1899 #endif // _MSC_VER | |
| 1900 | |
| 1901 | |
| 1902 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1903 SharedHeap(policy_), | |
| 1904 _g1_policy(policy_), | |
| 1111 | 1905 _dirty_card_queue_set(false), |
| 1705 | 1906 _into_cset_dirty_card_queue_set(false), |
|
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1907 _is_alive_closure_cm(this), |
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1908 _is_alive_closure_stw(this), |
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1909 _ref_processor_cm(NULL), |
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1910 _ref_processor_stw(NULL), |
| 342 | 1911 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1912 _bot_shared(NULL), | |
| 10405 | 1913 _evac_failure_scan_stack(NULL), |
| 342 | 1914 _mark_in_progress(false), |
| 2152 | 1915 _cg1r(NULL), _summary_bytes_used(0), |
|
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1916 _g1mm(NULL), |
| 342 | 1917 _refine_cte_cl(NULL), |
| 1918 _full_collection(false), | |
|
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1919 _free_list("Master Free List", new MasterFreeRegionListMtSafeChecker()), |
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1920 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1921 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1922 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
| 2152 | 1923 _free_regions_coming(false), |
| 342 | 1924 _young_list(new YoungList(this)), |
| 1925 _gc_time_stamp(0), | |
|
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1926 _retained_old_gc_alloc_region(NULL), |
| 6595 | 1927 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1928 _old_plab_stats(OldPLABSize, PLABWeight), | |
|
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1929 _expand_heap_after_alloc_failure(true), |
| 526 | 1930 _surviving_young_words(NULL), |
|
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1931 _old_marking_cycles_started(0), |
|
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1932 _old_marking_cycles_completed(0), |
| 10405 | 1933 _concurrent_cycle_started(false), |
| 526 | 1934 _in_cset_fast_test(NULL), |
|
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1935 _in_cset_fast_test_base(NULL), |
|
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1936 _dirty_cards_region_list(NULL), |
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1937 _worker_cset_start_region(NULL), |
| 10405 | 1938 _worker_cset_start_region_time_stamp(NULL), |
| 1939 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
| 1940 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
| 1941 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
| 1942 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
| 1943 | |
| 1944 _g1h = this; | |
| 342 | 1945 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
| 1946 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1947 } | |
|
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1948 |
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1949 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1950 |
| 342 | 1951 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1952 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1953 | |
|
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1954 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
| 342 | 1955 assert(n_rem_sets > 0, "Invariant."); |
| 1956 | |
| 6197 | 1957 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1958 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
| 10405 | 1959 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
|
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1960 |
| 342 | 1961 for (int i = 0; i < n_queues; i++) { |
| 1962 RefToScanQueue* q = new RefToScanQueue(); | |
| 1963 q->initialize(); | |
| 1964 _task_queues->register_queue(i, q); | |
| 10405 | 1965 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
| 1966 } | |
|
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1967 clear_cset_start_regions(); |
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1968 |
|
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1969 // Initialize the G1EvacuationFailureALot counters and flags. |
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1970 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1971 |
| 342 | 1972 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1973 } | |
| 1974 | |
| 1975 jint G1CollectedHeap::initialize() { | |
| 1166 | 1976 CollectedHeap::pre_initialize(); |
| 342 | 1977 os::enable_vtime(); |
| 1978 | |
|
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1979 G1Log::init(); |
|
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1980 |
| 342 | 1981 // Necessary to satisfy locking discipline assertions. |
| 1982 | |
| 1983 MutexLocker x(Heap_lock); | |
| 1984 | |
|
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1985 // We have to initialize the printer before committing the heap, as |
|
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1986 // it will be used then. |
|
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1987 _hr_printer.set_active(G1PrintHeapRegions); |
|
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1988 |
| 342 | 1989 // While there are no constraints in the GC code that HeapWordSize |
| 1990 // be any particular value, there are multiple other areas in the | |
| 1991 // system which believe this to be true (e.g. oop->object_size in some | |
| 1992 // cases incorrectly returns the size in wordSize units rather than | |
| 1993 // HeapWordSize). | |
| 1994 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 1995 | |
| 1996 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 1997 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
|
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|
1998 size_t heap_alignment = collector_policy()->heap_alignment(); |
| 342 | 1999 |
| 2000 // Ensure that the sizes are properly aligned. | |
| 2001 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 2002 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
|
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|
2003 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
| 342 | 2004 |
|
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|
2005 _cg1r = new ConcurrentG1Refine(this); |
| 342 | 2006 |
| 2007 // Reserve the maximum. | |
|
642
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6791178: Specialize for zero as the compressed oop vm heap base
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|
2008 |
|
3824
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|
2009 // When compressed oops are enabled, the preferred heap base |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
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|
2010 // is calculated by subtracting the requested size from the |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
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|
2011 // 32Gb boundary and using the result as the base address for |
|
6aa4feb8a366
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johnc
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|
2012 // heap reservation. If the requested size is not aligned to |
|
6aa4feb8a366
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johnc
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|
2013 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
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|
2014 // into the ReservedHeapSpace constructor) then the actual |
|
6aa4feb8a366
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johnc
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|
2015 // base of the reserved heap may end up differing from the |
|
6aa4feb8a366
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johnc
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|
2016 // address that was requested (i.e. the preferred heap base). |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
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|
2017 // If this happens then we could end up using a non-optimal |
|
6aa4feb8a366
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|
2018 // compressed oops mode. |
|
6aa4feb8a366
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johnc
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|
2019 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
2020 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
|
12110
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|
2021 heap_alignment); |
| 342 | 2022 |
| 2023 // It is important to do this in a way such that concurrent readers can't | |
| 10405 | 2024 // temporarily think something is in the heap. (I've actually seen this |
| 342 | 2025 // happen in asserts: DLD.) |
| 2026 _reserved.set_word_size(0); | |
| 2027 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 2028 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 2029 | |
|
6010
720b6a76dd9d
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|
2030 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
| 342 | 2031 |
| 2032 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 2033 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 2034 set_barrier_set(rem_set()->bs()); | |
| 12343 | 2035 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
| 2036 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
| 342 | 2037 return JNI_ENOMEM; |
| 2038 } | |
| 2039 | |
| 2040 // Also create a G1 rem set. | |
| 12343 | 2041 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
| 342 | 2042 |
| 2043 // Carve out the G1 part of the heap. | |
| 2044 | |
| 2045 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
| 2046 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
| 2047 g1_rs.size()/HeapWordSize); | |
| 2048 | |
| 2049 _g1_storage.initialize(g1_rs, 0); | |
| 2050 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
| 3766 | 2051 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
|
12305
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7163191: G1: introduce a "heap spanning table" abstraction
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|
2052 (HeapWord*) _g1_reserved.end()); |
|
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
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|
2053 assert(_hrs.max_length() == _expansion_regions, |
|
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
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|
2054 err_msg("max length: %u expansion regions: %u", |
|
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
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|
2055 _hrs.max_length(), _expansion_regions)); |
| 342 | 2056 |
|
10246
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|
2057 // Do later initialization work for concurrent refinement. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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|
2058 _cg1r->init(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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10242
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|
2059 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
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796
diff
changeset
|
2060 // 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
|
2061 // in the remembered set structures. |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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parents:
6008
diff
changeset
|
2062 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
|
2063 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
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796
diff
changeset
|
2064 |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2065 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
|
2066 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
|
2067 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2068 "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
|
2069 |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
2070 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
| 2152 | 2071 |
| 342 | 2072 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
| 2073 heap_word_size(init_byte_size)); | |
| 2074 | |
| 2075 _g1h = this; | |
| 2076 | |
|
10246
194f52aa2f23
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johnc
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diff
changeset
|
2077 _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
|
2078 _in_cset_fast_test_base = |
| 6197 | 2079 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
|
2080 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2081 // 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
|
2082 // 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
|
2083 // 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
|
2084 _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
|
2085 ((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
|
2086 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
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10242
diff
changeset
|
2087 // 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
|
2088 // 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
|
2089 // evacuation pause. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2090 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
|
2091 |
| 342 | 2092 // Create the ConcurrentMark data structure and thread. |
| 2093 // (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
|
2094 _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
|
2095 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
|
2096 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
|
2097 return JNI_ENOMEM; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2098 } |
| 342 | 2099 _cmThread = _cm->cmThread(); |
| 2100 | |
| 2101 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2102 HeapRegionRemSet::init_heap(max_regions()); | |
| 2103 | |
| 677 | 2104 // Now expand into the initial heap size. |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2105 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
|
2106 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
|
2107 return JNI_ENOMEM; |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2108 } |
| 342 | 2109 |
| 2110 // Perform any initialization actions delegated to the policy. | |
| 2111 g1_policy()->init(); | |
| 2112 | |
| 2113 _refine_cte_cl = | |
| 20192 | 2114 new RefineCardTableEntryClosure(g1_rem_set(), |
| 342 | 2115 concurrent_g1_refine()); |
| 2116 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 2117 | |
| 2118 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2119 SATB_Q_FL_lock, | |
| 1111 | 2120 G1SATBProcessCompletedThreshold, |
| 342 | 2121 Shared_SATB_Q_lock); |
| 794 | 2122 |
| 2123 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
| 2124 DirtyCardQ_FL_lock, | |
| 1111 | 2125 concurrent_g1_refine()->yellow_zone(), |
| 2126 concurrent_g1_refine()->red_zone(), | |
| 794 | 2127 Shared_DirtyCardQ_lock); |
| 2128 | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2129 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2130 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2131 DirtyCardQ_FL_lock, |
| 1111 | 2132 -1, // never trigger processing |
| 2133 -1, // no limit on length | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2134 Shared_DirtyCardQ_lock, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2135 &JavaThread::dirty_card_queue_set()); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2136 } |
| 1705 | 2137 |
| 2138 // Initialize the card queue set used to hold cards containing | |
| 2139 // references into the collection set. | |
| 2140 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
| 2141 DirtyCardQ_FL_lock, | |
| 2142 -1, // never trigger processing | |
| 2143 -1, // no limit on length | |
| 2144 Shared_DirtyCardQ_lock, | |
| 2145 &JavaThread::dirty_card_queue_set()); | |
| 2146 | |
| 342 | 2147 // In case we're keeping closure specialization stats, initialize those |
| 2148 // counts and that mechanism. | |
| 2149 SpecializationStats::clear(); | |
| 2150 | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2151 // 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
|
2152 // 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
|
2153 // space here, lots of asserts fire. |
| 3766 | 2154 |
| 2155 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
| 2156 _g1_reserved.start()); | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2157 // 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
|
2158 // 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
|
2159 // 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
|
2160 // 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
|
2161 dummy_region->set_young(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2162 // Make sure it's full. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2163 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2164 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2165 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2166 init_mutator_alloc_region(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2167 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2168 // 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
|
2169 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2170 _g1mm = new G1MonitoringSupport(this); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2171 |
| 17764 | 2172 G1StringDedup::initialize(); |
| 2173 | |
| 342 | 2174 return JNI_OK; |
| 2175 } | |
| 2176 | |
|
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2177 void G1CollectedHeap::stop() { |
| 17992 | 2178 // Stop all concurrent threads. We do this to make sure these threads |
| 2179 // do not continue to execute and access resources (e.g. gclog_or_tty) | |
|
17947
1772223a25a2
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|
2180 // that are destroyed during shutdown. |
| 17992 | 2181 _cg1r->stop(); |
| 2182 _cmThread->stop(); | |
| 2183 if (G1StringDedup::is_enabled()) { | |
| 2184 G1StringDedup::stop(); | |
| 2185 } | |
|
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|
2186 } |
|
1772223a25a2
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|
2187 |
|
12233
40136aa2cdb1
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|
2188 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
|
40136aa2cdb1
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|
2189 return HeapRegion::max_region_size(); |
|
40136aa2cdb1
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|
2190 } |
|
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|
2191 |
| 342 | 2192 void G1CollectedHeap::ref_processing_init() { |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
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|
2193 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
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|
2194 // |
|
3979
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|
2195 // * There are two reference processor instances. One is |
|
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|
2196 // used to record and process discovered references |
|
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|
2197 // during concurrent marking; the other is used to |
|
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|
2198 // record and process references during STW pauses |
|
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|
2199 // (both full and incremental). |
|
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|
2200 // * Both ref processors need to 'span' the entire heap as |
|
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|
2201 // the regions in the collection set may be dotted around. |
|
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|
2202 // |
|
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|
2203 // * For the concurrent marking ref processor: |
|
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|
2204 // * Reference discovery is enabled at initial marking. |
|
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|
2205 // * Reference discovery is disabled and the discovered |
|
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|
2206 // references processed etc during remarking. |
|
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|
2207 // * Reference discovery is MT (see below). |
|
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|
2208 // * Reference discovery requires a barrier (see below). |
|
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|
2209 // * Reference processing may or may not be MT |
|
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|
2210 // (depending on the value of ParallelRefProcEnabled |
|
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|
2211 // and ParallelGCThreads). |
|
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|
2212 // * A full GC disables reference discovery by the CM |
|
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|
2213 // ref processor and abandons any entries on it's |
|
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|
2214 // discovered lists. |
|
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|
2215 // |
|
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|
2216 // * For the STW processor: |
|
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|
2217 // * Non MT discovery is enabled at the start of a full GC. |
|
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|
2218 // * Processing and enqueueing during a full GC is non-MT. |
|
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|
2219 // * During a full GC, references are processed after marking. |
|
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|
2220 // |
|
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|
2221 // * Discovery (may or may not be MT) is enabled at the start |
|
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|
2222 // of an incremental evacuation pause. |
|
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|
2223 // * References are processed near the end of a STW evacuation pause. |
|
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|
2224 // * For both types of GC: |
|
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|
2225 // * Discovery is atomic - i.e. not concurrent. |
|
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|
2226 // * Reference discovery will not need a barrier. |
|
1974
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|
2227 |
| 342 | 2228 SharedHeap::ref_processing_init(); |
| 2229 MemRegion mr = reserved_region(); | |
|
3979
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|
2230 |
|
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|
2231 // Concurrent Mark ref processor |
|
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|
2232 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
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diff
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|
2233 new ReferenceProcessor(mr, // span |
|
3979
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|
2234 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
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|
2235 // mt processing |
|
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|
2236 (int) ParallelGCThreads, |
|
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|
2237 // degree of mt processing |
|
4dfb2df418f2
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|
2238 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
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|
2239 // mt discovery |
|
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|
2240 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
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|
2241 // degree of mt discovery |
|
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|
2242 false, |
|
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|
2243 // Reference discovery is not atomic |
|
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|
2244 &_is_alive_closure_cm); |
|
3979
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|
2245 // is alive closure |
|
4dfb2df418f2
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|
2246 // (for efficiency/performance) |
|
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|
2247 |
|
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|
2248 // STW ref processor |
|
4dfb2df418f2
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|
2249 _ref_processor_stw = |
|
4dfb2df418f2
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changeset
|
2250 new ReferenceProcessor(mr, // span |
|
4dfb2df418f2
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|
2251 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
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|
2252 // mt processing |
|
4dfb2df418f2
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|
2253 MAX2((int)ParallelGCThreads, 1), |
|
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|
2254 // degree of mt processing |
|
4dfb2df418f2
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diff
changeset
|
2255 (ParallelGCThreads > 1), |
|
4dfb2df418f2
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changeset
|
2256 // mt discovery |
|
4dfb2df418f2
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|
2257 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
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changeset
|
2258 // degree of mt discovery |
|
4dfb2df418f2
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diff
changeset
|
2259 true, |
|
4dfb2df418f2
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|
2260 // Reference discovery is atomic |
|
17976
8e20ef014b08
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|
2261 &_is_alive_closure_stw); |
|
3979
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|
2262 // is alive closure |
|
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|
2263 // (for efficiency/performance) |
| 342 | 2264 } |
| 2265 | |
| 2266 size_t G1CollectedHeap::capacity() const { | |
| 2267 return _g1_committed.byte_size(); | |
| 2268 } | |
| 2269 | |
|
6254
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|
2270 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
|
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|
2271 assert(!hr->continuesHumongous(), "pre-condition"); |
|
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|
2272 hr->reset_gc_time_stamp(); |
|
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|
2273 if (hr->startsHumongous()) { |
|
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|
2274 uint first_index = hr->hrs_index() + 1; |
|
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|
2275 uint last_index = hr->last_hc_index(); |
|
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|
2276 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2277 HeapRegion* chr = region_at(i); |
|
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|
2278 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2279 chr->reset_gc_time_stamp(); |
|
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|
2280 } |
|
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|
2281 } |
|
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|
2282 } |
|
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|
2283 |
|
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|
2284 #ifndef PRODUCT |
|
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|
2285 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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|
2286 private: |
|
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|
2287 unsigned _gc_time_stamp; |
|
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|
2288 bool _failures; |
|
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|
2289 |
|
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|
2290 public: |
|
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|
2291 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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|
2292 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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|
2293 |
|
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|
2294 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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|
2295 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
|
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2296 if (_gc_time_stamp != region_gc_time_stamp) { |
|
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|
2297 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
|
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|
2298 "expected %d", HR_FORMAT_PARAMS(hr), |
|
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|
2299 region_gc_time_stamp, _gc_time_stamp); |
|
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|
2300 _failures = true; |
|
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|
2301 } |
|
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|
2302 return false; |
|
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|
2303 } |
|
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|
2304 |
|
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|
2305 bool failures() { return _failures; } |
|
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|
2306 }; |
|
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|
2307 |
|
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|
2308 void G1CollectedHeap::check_gc_time_stamps() { |
|
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|
2309 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
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|
2310 heap_region_iterate(&cl); |
|
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|
2311 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
|
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|
2312 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2313 #endif // PRODUCT |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2314 |
| 1705 | 2315 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2316 DirtyCardQueue* into_cset_dcq, | |
| 2317 bool concurrent, | |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2318 uint worker_i) { |
| 889 | 2319 // 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
|
2320 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
|
2321 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2322 |
| 342 | 2323 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2324 int n_completed_buffers = 0; | |
| 1705 | 2325 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2326 n_completed_buffers++; |
| 2327 } | |
|
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
|
2328 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
| 342 | 2329 dcqs.clear_n_completed_buffers(); |
| 2330 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2331 } | |
| 2332 | |
| 2333 | |
| 2334 // Computes the sum of the storage used by the various regions. | |
| 2335 | |
| 2336 size_t G1CollectedHeap::used() const { | |
|
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2337 assert(Heap_lock->owner() != NULL, |
|
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2338 "Should be owned on this thread's behalf."); |
| 342 | 2339 size_t result = _summary_bytes_used; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2340 // 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
|
2341 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2342 if (hr != NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2343 result += hr->used(); |
| 342 | 2344 return result; |
| 2345 } | |
| 2346 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2347 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
|
2348 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
|
2349 return result; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2350 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2351 |
| 342 | 2352 class SumUsedClosure: public HeapRegionClosure { |
| 2353 size_t _used; | |
| 2354 public: | |
| 2355 SumUsedClosure() : _used(0) {} | |
| 2356 bool doHeapRegion(HeapRegion* r) { | |
| 2357 if (!r->continuesHumongous()) { | |
| 2358 _used += r->used(); | |
| 2359 } | |
| 2360 return false; | |
| 2361 } | |
| 2362 size_t result() { return _used; } | |
| 2363 }; | |
| 2364 | |
| 2365 size_t G1CollectedHeap::recalculate_used() const { | |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2366 double recalculate_used_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2367 |
| 342 | 2368 SumUsedClosure blk; |
| 3766 | 2369 heap_region_iterate(&blk); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2370 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2371 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
| 342 | 2372 return blk.result(); |
| 2373 } | |
| 2374 | |
| 2375 size_t G1CollectedHeap::unsafe_max_alloc() { | |
| 2152 | 2376 if (free_regions() > 0) return HeapRegion::GrainBytes; |
| 342 | 2377 // otherwise, is there space in the current allocation region? |
| 2378 | |
| 2379 // We need to store the current allocation region in a local variable | |
| 2380 // here. The problem is that this method doesn't take any locks and | |
| 2381 // there may be other threads which overwrite the current allocation | |
| 2382 // region field. attempt_allocation(), for example, sets it to NULL | |
| 2383 // and this can happen *after* the NULL check here but before the call | |
| 2384 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
| 2385 // to be a problem in the optimized build, since the two loads of the | |
| 2386 // current allocation region field are optimized away. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2387 HeapRegion* hr = _mutator_alloc_region.get(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2388 if (hr == NULL) { |
| 342 | 2389 return 0; |
| 2390 } | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2391 return hr->free(); |
| 342 | 2392 } |
| 2393 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2394 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
|
2395 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2396 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
|
2397 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
|
2398 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
|
2399 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2400 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2401 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2402 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2403 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2404 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2405 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2406 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2407 // 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
|
2408 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2409 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2410 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2411 // 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
|
2412 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2413 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2414 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2415 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2416 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2417 // 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
|
2418 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2419 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2420 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2421 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2422 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2423 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2424 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2425 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
|
2426 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
|
2427 _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
|
2428 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
|
2429 _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
|
2430 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2431 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2432 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2433 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2434 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
|
2435 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2436 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2437 // 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
|
2438 // 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
|
2439 // 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
|
2440 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2441 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2442 // 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
|
2443 // 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
|
2444 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2445 // 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
|
2446 // 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
|
2447 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2448 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2449 // 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
|
2450 assert(concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2451 (_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
|
2452 (_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
|
2453 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
|
2454 "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
|
2455 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2456 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2457 // 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
|
2458 assert(!concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2459 (_old_marking_cycles_started == _old_marking_cycles_completed + 1), |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2460 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
|
2461 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2462 "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
|
2463 _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
|
2464 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2465 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2466 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2467 // 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
|
2468 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
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diff
changeset
|
2469 // is set) so that if a waiter requests another System.gc() it doesn't |
| 10405 | 2470 // incorrectly see that a marking cycle is still in progress. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
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diff
changeset
|
2471 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
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|
2472 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
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|
2473 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
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|
2474 |
|
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6944166: G1: explicit GCs are not always handled correctly
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|
2475 // This notify_all() will ensure that a thread that called |
|
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|
2476 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
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|
2477 // and it's waiting for a full GC to finish will be woken up. It is |
|
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|
2478 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
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|
2479 FullGCCount_lock->notify_all(); |
|
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|
2480 } |
|
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|
2481 |
|
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diff
changeset
|
2482 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
| 10405 | 2483 _concurrent_cycle_started = true; |
| 2484 _gc_timer_cm->register_gc_start(start_time); | |
| 2485 | |
| 2486 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
| 2487 trace_heap_before_gc(_gc_tracer_cm); | |
| 2488 } | |
| 2489 | |
| 2490 void G1CollectedHeap::register_concurrent_cycle_end() { | |
| 2491 if (_concurrent_cycle_started) { | |
| 2492 if (_cm->has_aborted()) { | |
| 2493 _gc_tracer_cm->report_concurrent_mode_failure(); | |
| 2494 } | |
|
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
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|
2495 |
|
13400
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|
2496 _gc_timer_cm->register_gc_end(); |
| 10405 | 2497 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
| 2498 | |
| 2499 _concurrent_cycle_started = false; | |
| 2500 } | |
| 2501 } | |
| 2502 | |
| 2503 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
| 2504 if (_concurrent_cycle_started) { | |
| 2505 trace_heap_after_gc(_gc_tracer_cm); | |
| 2506 } | |
| 2507 } | |
| 2508 | |
| 2509 G1YCType G1CollectedHeap::yc_type() { | |
| 2510 bool is_young = g1_policy()->gcs_are_young(); | |
| 2511 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
| 2512 bool is_during_mark = mark_in_progress(); | |
| 2513 | |
| 2514 if (is_initial_mark) { | |
| 2515 return InitialMark; | |
| 2516 } else if (is_during_mark) { | |
| 2517 return DuringMark; | |
| 2518 } else if (is_young) { | |
| 2519 return Normal; | |
| 2520 } else { | |
| 2521 return Mixed; | |
| 2522 } | |
| 2523 } | |
| 2524 | |
|
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6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
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|
2525 void G1CollectedHeap::collect(GCCause::Cause cause) { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
2526 assert_heap_not_locked(); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
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|
2527 |
|
1656
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6944166: G1: explicit GCs are not always handled correctly
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|
2528 unsigned int gc_count_before; |
|
6120
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7172388: G1: _total_full_collections should not be incremented for concurrent cycles
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diff
changeset
|
2529 unsigned int old_marking_count_before; |
|
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
2530 bool retry_gc; |
|
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|
2531 |
|
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
2532 do { |
|
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|
2533 retry_gc = false; |
|
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|
2534 |
|
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
2535 { |
|
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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changeset
|
2536 MutexLocker ml(Heap_lock); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
2537 |
|
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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changeset
|
2538 // Read the GC count while holding the Heap_lock |
|
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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changeset
|
2539 gc_count_before = total_collections(); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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diff
changeset
|
2540 old_marking_count_before = _old_marking_cycles_started; |
|
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
2541 } |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
2542 |
|
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2543 if (should_do_concurrent_full_gc(cause)) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2544 // Schedule an initial-mark evacuation pause that will start a |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2545 // 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
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diff
changeset
|
2546 // we are not requesting a post-GC allocation. |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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diff
changeset
|
2547 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2548 0, /* word_size */ |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2549 true, /* should_initiate_conc_mark */ |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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1611
diff
changeset
|
2550 g1_policy()->max_pause_time_ms(), |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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diff
changeset
|
2551 cause); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
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4912
diff
changeset
|
2552 |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
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diff
changeset
|
2553 VMThread::execute(&op); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2554 if (!op.pause_succeeded()) { |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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diff
changeset
|
2555 if (old_marking_count_before == _old_marking_cycles_started) { |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
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diff
changeset
|
2556 retry_gc = op.should_retry_gc(); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2557 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2558 // 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
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diff
changeset
|
2559 // 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
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diff
changeset
|
2560 // that the whole heap was collected anyway. |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2561 } |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2562 |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2563 if (retry_gc) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2564 if (GC_locker::is_active_and_needs_gc()) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2565 GC_locker::stall_until_clear(); |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2566 } |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2567 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2568 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2569 } else { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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diff
changeset
|
2570 if (cause == GCCause::_gc_locker |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2571 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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4875
diff
changeset
|
2572 |
|
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
|
2573 // Schedule a standard evacuation pause. We're setting word_size |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2574 // 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
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4875
diff
changeset
|
2575 VM_G1IncCollectionPause op(gc_count_before, |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
2576 0, /* word_size */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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4875
diff
changeset
|
2577 false, /* should_initiate_conc_mark */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
changeset
|
2578 g1_policy()->max_pause_time_ms(), |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
changeset
|
2579 cause); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2580 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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4875
diff
changeset
|
2581 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2582 // Schedule a Full GC. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
diff
changeset
|
2583 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
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diff
changeset
|
2584 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
changeset
|
2585 } |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2586 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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diff
changeset
|
2587 } while (retry_gc); |
| 342 | 2588 } |
| 2589 | |
| 2590 bool G1CollectedHeap::is_in(const void* p) const { | |
| 4708 | 2591 if (_g1_committed.contains(p)) { |
| 2592 // Given that we know that p is in the committed space, | |
| 2593 // heap_region_containing_raw() should successfully | |
| 2594 // return the containing region. | |
| 2595 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2596 return hr->is_in(p); |
| 2597 } else { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
2598 return false; |
| 342 | 2599 } |
| 2600 } | |
| 2601 | |
| 2602 // Iteration functions. | |
| 2603 | |
| 2604 // Iterates an OopClosure over all ref-containing fields of objects | |
| 2605 // within a HeapRegion. | |
| 2606 | |
| 2607 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
| 2608 MemRegion _mr; | |
|
6725
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diff
changeset
|
2609 ExtendedOopClosure* _cl; |
| 342 | 2610 public: |
|
6725
da91efe96a93
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6629
diff
changeset
|
2611 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
| 342 | 2612 : _mr(mr), _cl(cl) {} |
| 2613 bool doHeapRegion(HeapRegion* r) { | |
|
6254
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|
2614 if (!r->continuesHumongous()) { |
| 342 | 2615 r->oop_iterate(_cl); |
| 2616 } | |
| 2617 return false; | |
| 2618 } | |
| 2619 }; | |
| 2620 | |
|
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
2621 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
| 342 | 2622 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
| 3766 | 2623 heap_region_iterate(&blk); |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2624 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2625 |
|
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6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2626 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
| 342 | 2627 IterateOopClosureRegionClosure blk(mr, cl); |
| 3766 | 2628 heap_region_iterate(&blk); |
| 342 | 2629 } |
| 2630 | |
| 2631 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2632 | |
| 2633 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2634 ObjectClosure* _cl; | |
| 2635 public: | |
| 2636 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2637 bool doHeapRegion(HeapRegion* r) { | |
| 2638 if (! r->continuesHumongous()) { | |
| 2639 r->object_iterate(_cl); | |
| 2640 } | |
| 2641 return false; | |
| 2642 } | |
| 2643 }; | |
| 2644 | |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
2645 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
| 342 | 2646 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2647 heap_region_iterate(&blk); |
| 342 | 2648 } |
| 2649 | |
| 2650 // Calls a SpaceClosure on a HeapRegion. | |
| 2651 | |
| 2652 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2653 SpaceClosure* _cl; | |
| 2654 public: | |
| 2655 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2656 bool doHeapRegion(HeapRegion* r) { | |
| 2657 _cl->do_space(r); | |
| 2658 return false; | |
| 2659 } | |
| 2660 }; | |
| 2661 | |
| 2662 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2663 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2664 heap_region_iterate(&blk); |
| 342 | 2665 } |
| 2666 | |
| 3766 | 2667 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
| 2668 _hrs.iterate(cl); | |
| 342 | 2669 } |
| 2670 | |
| 2671 void | |
| 2672 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
6254
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diff
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|
2673 uint worker_id, |
|
4728
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7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
2674 uint no_of_par_workers, |
| 342 | 2675 jint claim_value) { |
|
6010
720b6a76dd9d
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6008
diff
changeset
|
2676 const uint regions = n_regions(); |
|
4728
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7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
2677 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
2678 no_of_par_workers : |
|
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|
2679 1); |
|
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|
2680 assert(UseDynamicNumberOfGCThreads || |
|
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|
2681 no_of_par_workers == workers()->total_workers(), |
|
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|
2682 "Non dynamic should use fixed number of workers"); |
| 355 | 2683 // try to spread out the starting points of the workers |
|
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|
2684 const HeapRegion* start_hr = |
|
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|
2685 start_region_for_worker(worker_id, no_of_par_workers); |
|
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|
2686 const uint start_index = start_hr->hrs_index(); |
| 355 | 2687 |
| 2688 // each worker will actually look at all regions | |
|
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|
2689 for (uint count = 0; count < regions; ++count) { |
|
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|
2690 const uint index = (start_index + count) % regions; |
| 355 | 2691 assert(0 <= index && index < regions, "sanity"); |
| 2692 HeapRegion* r = region_at(index); | |
| 2693 // we'll ignore "continues humongous" regions (we'll process them | |
| 2694 // when we come across their corresponding "start humongous" | |
| 2695 // region) and regions already claimed | |
| 2696 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
| 2697 continue; | |
| 2698 } | |
| 2699 // OK, try to claim it | |
| 342 | 2700 if (r->claimHeapRegion(claim_value)) { |
| 355 | 2701 // success! |
| 2702 assert(!r->continuesHumongous(), "sanity"); | |
| 2703 if (r->startsHumongous()) { | |
| 2704 // If the region is "starts humongous" we'll iterate over its | |
| 2705 // "continues humongous" first; in fact we'll do them | |
| 2706 // first. The order is important. In on case, calling the | |
| 2707 // closure on the "starts humongous" region might de-allocate | |
| 2708 // and clear all its "continues humongous" regions and, as a | |
| 2709 // result, we might end up processing them twice. So, we'll do | |
| 2710 // them first (notice: most closures will ignore them anyway) and | |
| 2711 // then we'll do the "starts humongous" region. | |
|
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|
2712 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
| 355 | 2713 HeapRegion* chr = region_at(ch_index); |
| 2714 | |
| 2715 // if the region has already been claimed or it's not | |
| 2716 // "continues humongous" we're done | |
| 2717 if (chr->claim_value() == claim_value || | |
| 2718 !chr->continuesHumongous()) { | |
| 2719 break; | |
| 2720 } | |
| 2721 | |
| 10405 | 2722 // No one should have claimed it directly. We can given |
| 355 | 2723 // that we claimed its "starts humongous" region. |
| 2724 assert(chr->claim_value() != claim_value, "sanity"); | |
| 2725 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2726 | |
| 2727 if (chr->claimHeapRegion(claim_value)) { | |
| 10405 | 2728 // we should always be able to claim it; no one else should |
| 355 | 2729 // be trying to claim this region |
| 2730 | |
| 2731 bool res2 = cl->doHeapRegion(chr); | |
| 2732 assert(!res2, "Should not abort"); | |
| 2733 | |
| 2734 // Right now, this holds (i.e., no closure that actually | |
| 2735 // does something with "continues humongous" regions | |
| 2736 // clears them). We might have to weaken it in the future, | |
| 2737 // but let's leave these two asserts here for extra safety. | |
| 2738 assert(chr->continuesHumongous(), "should still be the case"); | |
| 2739 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2740 } else { | |
| 2741 guarantee(false, "we should not reach here"); | |
| 2742 } | |
| 2743 } | |
| 2744 } | |
| 2745 | |
| 2746 assert(!r->continuesHumongous(), "sanity"); | |
| 2747 bool res = cl->doHeapRegion(r); | |
| 2748 assert(!res, "Should not abort"); | |
| 2749 } | |
| 2750 } | |
| 2751 } | |
| 2752 | |
| 390 | 2753 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2754 public: | |
| 2755 bool doHeapRegion(HeapRegion* r) { | |
| 2756 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2757 return false; | |
| 2758 } | |
| 2759 }; | |
| 2760 | |
|
4783
023652e49ac0
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|
2761 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2762 ResetClaimValuesClosure blk; |
| 2763 heap_region_iterate(&blk); | |
| 2764 } | |
| 2765 | |
|
4783
023652e49ac0
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|
2766 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
023652e49ac0
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|
2767 ResetClaimValuesClosure blk; |
|
023652e49ac0
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|
2768 collection_set_iterate(&blk); |
|
023652e49ac0
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|
2769 } |
|
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|
2770 |
| 355 | 2771 #ifdef ASSERT |
| 2772 // This checks whether all regions in the heap have the correct claim | |
| 2773 // value. I also piggy-backed on this a check to ensure that the | |
| 2774 // humongous_start_region() information on "continues humongous" | |
| 2775 // regions is correct. | |
| 2776 | |
| 2777 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2778 private: | |
| 2779 jint _claim_value; | |
|
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|
2780 uint _failures; |
| 355 | 2781 HeapRegion* _sh_region; |
|
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|
2782 |
| 355 | 2783 public: |
| 2784 CheckClaimValuesClosure(jint claim_value) : | |
| 2785 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2786 bool doHeapRegion(HeapRegion* r) { | |
| 2787 if (r->claim_value() != _claim_value) { | |
|
4097
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|
2788 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2789 "claim value = %d, should be %d", |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2790 HR_FORMAT_PARAMS(r), |
|
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|
2791 r->claim_value(), _claim_value); |
| 355 | 2792 ++_failures; |
| 2793 } | |
| 2794 if (!r->isHumongous()) { | |
| 2795 _sh_region = NULL; | |
| 2796 } else if (r->startsHumongous()) { | |
| 2797 _sh_region = r; | |
| 2798 } else if (r->continuesHumongous()) { | |
| 2799 if (r->humongous_start_region() != _sh_region) { | |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2800 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2801 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2802 HR_FORMAT_PARAMS(r), |
| 355 | 2803 r->humongous_start_region(), |
| 2804 _sh_region); | |
| 2805 ++_failures; | |
| 342 | 2806 } |
| 2807 } | |
| 355 | 2808 return false; |
| 2809 } | |
|
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diff
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|
2810 uint failures() { return _failures; } |
| 355 | 2811 }; |
| 2812 | |
| 2813 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2814 CheckClaimValuesClosure cl(claim_value); | |
| 2815 heap_region_iterate(&cl); | |
| 2816 return cl.failures() == 0; | |
| 2817 } | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2818 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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4095
diff
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|
2819 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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diff
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|
2820 private: |
|
720b6a76dd9d
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6008
diff
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|
2821 jint _claim_value; |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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diff
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|
2822 uint _failures; |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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4095
diff
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|
2823 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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4095
diff
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|
2824 public: |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
2825 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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diff
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|
2826 _claim_value(claim_value), _failures(0) { } |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
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|
2827 |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
2828 uint failures() { return _failures; } |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
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|
2829 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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4095
diff
changeset
|
2830 bool doHeapRegion(HeapRegion* hr) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2831 assert(hr->in_collection_set(), "how?"); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
2832 assert(!hr->isHumongous(), "H-region in CSet"); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
2833 if (hr->claim_value() != _claim_value) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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parents:
4095
diff
changeset
|
2834 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2835 "claim value = %d, should be %d", |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2836 HR_FORMAT_PARAMS(hr), |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
2837 hr->claim_value(), _claim_value); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2838 _failures += 1; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2839 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2840 return false; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2841 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
2842 }; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
2843 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
2844 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2845 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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4095
diff
changeset
|
2846 collection_set_iterate(&cl); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
2847 return cl.failures() == 0; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
2848 } |
| 355 | 2849 #endif // ASSERT |
| 342 | 2850 |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2851 // Clear the cached CSet starting regions and (more importantly) |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2852 // the time stamps. Called when we reset the GC time stamp. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2853 void G1CollectedHeap::clear_cset_start_regions() { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2854 assert(_worker_cset_start_region != NULL, "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2855 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2856 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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4708
diff
changeset
|
2857 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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4708
diff
changeset
|
2858 for (int i = 0; i < n_queues; i++) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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4708
diff
changeset
|
2859 _worker_cset_start_region[i] = NULL; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2860 _worker_cset_start_region_time_stamp[i] = 0; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2861 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2862 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2863 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2864 // Given the id of a worker, obtain or calculate a suitable |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2865 // 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
|
2866 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(uint worker_i) { |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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parents:
4708
diff
changeset
|
2867 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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diff
changeset
|
2868 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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4708
diff
changeset
|
2869 HeapRegion* result = NULL; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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parents:
4708
diff
changeset
|
2870 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2871 |
|
fd2b426c30db
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4708
diff
changeset
|
2872 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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4708
diff
changeset
|
2873 // 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
|
2874 // 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
|
2875 // Note: the cached starting heap region may be NULL |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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4708
diff
changeset
|
2876 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2877 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
|
2878 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
|
2879 return result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2880 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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parents:
4708
diff
changeset
|
2881 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2882 // 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
|
2883 // 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
|
2884 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2885 // 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
|
2886 // 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
|
2887 // avoid contention. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2888 // If we have: |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2889 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2890 // p threads |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2891 // 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
|
2892 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2893 result = g1_policy()->collection_set(); |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2894 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2895 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
|
2896 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
|
2897 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2898 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2899 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2900 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2901 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
|
2902 uint start_ind = 0; |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2903 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2904 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2905 _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
|
2906 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2907 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2908 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
|
2909 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
|
2910 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2911 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2912 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
|
2913 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2914 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2915 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2916 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2917 // 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
|
2918 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2919 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
|
2920 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
|
2921 "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
|
2922 _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
|
2923 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2924 _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
|
2925 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2926 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2927 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2928 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2929 uint no_of_par_workers) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2930 uint worker_num = |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2931 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
|
2932 assert(UseDynamicNumberOfGCThreads || |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2933 no_of_par_workers == workers()->total_workers(), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2934 "Non dynamic should use fixed number of workers"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2935 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
|
2936 return region_at(start_index); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2937 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2938 |
| 342 | 2939 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2940 HeapRegion* r = g1_policy()->collection_set(); | |
| 2941 while (r != NULL) { | |
| 2942 HeapRegion* next = r->next_in_collection_set(); | |
| 2943 if (cl->doHeapRegion(r)) { | |
| 2944 cl->incomplete(); | |
| 2945 return; | |
| 2946 } | |
| 2947 r = next; | |
| 2948 } | |
| 2949 } | |
| 2950 | |
| 2951 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2952 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2953 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2954 // 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
|
2955 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2956 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2957 |
| 342 | 2958 assert(r->in_collection_set(), |
| 2959 "Start region must be a member of the collection set."); | |
| 2960 HeapRegion* cur = r; | |
| 2961 while (cur != NULL) { | |
| 2962 HeapRegion* next = cur->next_in_collection_set(); | |
| 2963 if (cl->doHeapRegion(cur) && false) { | |
| 2964 cl->incomplete(); | |
| 2965 return; | |
| 2966 } | |
| 2967 cur = next; | |
| 2968 } | |
| 2969 cur = g1_policy()->collection_set(); | |
| 2970 while (cur != r) { | |
| 2971 HeapRegion* next = cur->next_in_collection_set(); | |
| 2972 if (cl->doHeapRegion(cur) && false) { | |
| 2973 cl->incomplete(); | |
| 2974 return; | |
| 2975 } | |
| 2976 cur = next; | |
| 2977 } | |
| 2978 } | |
| 2979 | |
| 2980 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
| 3766 | 2981 return n_regions() > 0 ? region_at(0) : NULL; |
| 342 | 2982 } |
| 2983 | |
| 2984 | |
| 2985 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
| 2986 Space* res = heap_region_containing(addr); | |
| 2987 return res; | |
| 2988 } | |
| 2989 | |
| 2990 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2991 Space* sp = space_containing(addr); | |
| 2992 if (sp != NULL) { | |
| 2993 return sp->block_start(addr); | |
| 2994 } | |
| 2995 return NULL; | |
| 2996 } | |
| 2997 | |
| 2998 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 2999 Space* sp = space_containing(addr); | |
| 3000 assert(sp != NULL, "block_size of address outside of heap"); | |
| 3001 return sp->block_size(addr); | |
| 3002 } | |
| 3003 | |
| 3004 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 3005 Space* sp = space_containing(addr); | |
| 3006 return sp->block_is_obj(addr); | |
| 3007 } | |
| 3008 | |
| 3009 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 3010 return true; | |
| 3011 } | |
| 3012 | |
| 3013 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 17727 | 3014 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
| 3015 } | |
| 3016 | |
| 3017 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
| 3018 return young_list()->eden_used_bytes(); | |
| 3019 } | |
| 3020 | |
| 3021 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
| 3022 // must be smaller than the humongous object limit. | |
| 3023 size_t G1CollectedHeap::max_tlab_size() const { | |
| 3024 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
| 342 | 3025 } |
| 3026 | |
| 3027 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 3028 // Return the remaining space in the cur alloc region, but not less than | |
| 3029 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3030 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3031 // Also, this value can be at most the humongous object threshold, |
| 10405 | 3032 // 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
|
3033 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3034 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3035 HeapRegion* hr = _mutator_alloc_region.get(); |
| 17727 | 3036 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
|
3037 if (hr == NULL) { |
| 17727 | 3038 return max_tlab; |
| 342 | 3039 } else { |
| 17727 | 3040 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
| 342 | 3041 } |
| 3042 } | |
| 3043 | |
| 3044 size_t G1CollectedHeap::max_capacity() const { | |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
3045 return _g1_reserved.byte_size(); |
| 342 | 3046 } |
| 3047 | |
| 3048 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 3049 // assert(false, "NYI"); | |
| 3050 return 0; | |
| 3051 } | |
| 3052 | |
| 3053 void G1CollectedHeap::prepare_for_verify() { | |
| 3054 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 3055 ensure_parsability(false); | |
| 3056 } | |
| 3057 g1_rem_set()->prepare_for_verify(); | |
| 3058 } | |
| 3059 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3060 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3061 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3062 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3063 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3064 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3065 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3066 return hr->obj_allocated_since_next_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3067 case VerifyOption_G1UseMarkWord: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3068 return false; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3069 default: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3070 ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3071 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3072 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3073 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3074 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3075 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3076 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3077 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3078 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3079 case VerifyOption_G1UseMarkWord: return NULL; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3080 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3081 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3082 return NULL; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3083 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3084 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3085 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
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3086 switch (vo) { |
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3087 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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3088 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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3089 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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3090 default: ShouldNotReachHere(); |
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3091 } |
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3092 return false; // keep some compilers happy |
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3093 } |
|
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3094 |
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3095 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
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3096 switch (vo) { |
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3097 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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3098 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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3099 case VerifyOption_G1UseMarkWord: return "NONE"; |
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3100 default: ShouldNotReachHere(); |
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3101 } |
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3102 return NULL; // keep some compilers happy |
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3103 } |
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3104 |
|
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3105 class VerifyRootsClosure: public OopClosure { |
| 12080 | 3106 private: |
| 3107 G1CollectedHeap* _g1h; | |
| 3108 VerifyOption _vo; | |
| 3109 bool _failures; | |
| 3110 public: | |
| 3111 // _vo == UsePrevMarking -> use "prev" marking information, | |
| 3112 // _vo == UseNextMarking -> use "next" marking information, | |
| 3113 // _vo == UseMarkWord -> use mark word from object header. | |
| 3114 VerifyRootsClosure(VerifyOption vo) : | |
| 3115 _g1h(G1CollectedHeap::heap()), | |
| 3116 _vo(vo), | |
| 3117 _failures(false) { } | |
| 3118 | |
| 3119 bool failures() { return _failures; } | |
| 3120 | |
| 3121 template <class T> void do_oop_nv(T* p) { | |
| 3122 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3123 if (!oopDesc::is_null(heap_oop)) { | |
| 3124 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3125 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
| 3126 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
| 3127 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
| 3128 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3129 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
| 3130 } | |
| 3131 obj->print_on(gclog_or_tty); | |
| 3132 _failures = true; | |
| 3133 } | |
| 3134 } | |
| 3135 } | |
| 3136 | |
| 3137 void do_oop(oop* p) { do_oop_nv(p); } | |
| 3138 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 3139 }; | |
| 3140 | |
|
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3141 class G1VerifyCodeRootOopClosure: public OopClosure { |
| 12080 | 3142 G1CollectedHeap* _g1h; |
| 3143 OopClosure* _root_cl; | |
| 3144 nmethod* _nm; | |
| 3145 VerifyOption _vo; | |
| 3146 bool _failures; | |
| 3147 | |
| 3148 template <class T> void do_oop_work(T* p) { | |
| 3149 // First verify that this root is live | |
| 3150 _root_cl->do_oop(p); | |
| 3151 | |
| 3152 if (!G1VerifyHeapRegionCodeRoots) { | |
| 3153 // We're not verifying the code roots attached to heap region. | |
| 3154 return; | |
| 3155 } | |
| 3156 | |
| 3157 // Don't check the code roots during marking verification in a full GC | |
| 3158 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3159 return; | |
| 3160 } | |
| 3161 | |
| 3162 // Now verify that the current nmethod (which contains p) is | |
| 3163 // in the code root list of the heap region containing the | |
| 3164 // object referenced by p. | |
| 3165 | |
| 3166 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3167 if (!oopDesc::is_null(heap_oop)) { | |
| 3168 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3169 | |
| 3170 // Now fetch the region containing the object | |
| 3171 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
| 3172 HeapRegionRemSet* hrrs = hr->rem_set(); | |
| 3173 // Verify that the strong code root list for this region | |
| 3174 // contains the nmethod | |
| 3175 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
| 3176 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
| 3177 "from nmethod "PTR_FORMAT" not in strong " | |
| 3178 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
| 3179 p, _nm, hr->bottom(), hr->end()); | |
| 3180 _failures = true; | |
| 3181 } | |
| 3182 } | |
| 3183 } | |
| 3184 | |
| 3185 public: | |
| 3186 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
| 3187 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
| 3188 | |
| 3189 void do_oop(oop* p) { do_oop_work(p); } | |
| 3190 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 3191 | |
| 3192 void set_nmethod(nmethod* nm) { _nm = nm; } | |
| 3193 bool failures() { return _failures; } | |
| 3194 }; | |
| 3195 | |
| 3196 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
| 3197 G1VerifyCodeRootOopClosure* _oop_cl; | |
| 3198 | |
| 3199 public: | |
| 3200 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
| 3201 _oop_cl(oop_cl) {} | |
| 3202 | |
| 3203 void do_code_blob(CodeBlob* cb) { | |
| 3204 nmethod* nm = cb->as_nmethod_or_null(); | |
| 3205 if (nm != NULL) { | |
| 3206 _oop_cl->set_nmethod(nm); | |
| 3207 nm->oops_do(_oop_cl); | |
| 3208 } | |
| 3209 } | |
| 3210 }; | |
| 3211 | |
| 3212 class YoungRefCounterClosure : public OopClosure { | |
| 3213 G1CollectedHeap* _g1h; | |
| 3214 int _count; | |
| 3215 public: | |
| 3216 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
| 3217 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
| 3218 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 3219 | |
| 3220 int count() { return _count; } | |
| 3221 void reset_count() { _count = 0; }; | |
| 3222 }; | |
| 3223 | |
| 3224 class VerifyKlassClosure: public KlassClosure { | |
| 3225 YoungRefCounterClosure _young_ref_counter_closure; | |
| 3226 OopClosure *_oop_closure; | |
| 3227 public: | |
| 3228 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
| 3229 void do_klass(Klass* k) { | |
| 3230 k->oops_do(_oop_closure); | |
| 3231 | |
| 3232 _young_ref_counter_closure.reset_count(); | |
| 3233 k->oops_do(&_young_ref_counter_closure); | |
| 3234 if (_young_ref_counter_closure.count() > 0) { | |
| 3235 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
| 3236 } | |
| 3237 } | |
| 3238 }; | |
| 3239 | |
| 342 | 3240 class VerifyLivenessOopClosure: public OopClosure { |
|
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3241 G1CollectedHeap* _g1h; |
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3242 VerifyOption _vo; |
| 342 | 3243 public: |
|
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3244 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
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3245 _g1h(g1h), _vo(vo) |
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3246 { } |
|
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3247 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3248 void do_oop( oop *p) { do_oop_work(p); } |
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3249 |
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3250 template <class T> void do_oop_work(T *p) { |
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3251 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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3252 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
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|
3253 "Dead object referenced by a not dead object"); |
| 342 | 3254 } |
| 3255 }; | |
| 3256 | |
| 3257 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3258 private: |
| 342 | 3259 G1CollectedHeap* _g1h; |
| 3260 size_t _live_bytes; | |
| 3261 HeapRegion *_hr; | |
|
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|
3262 VerifyOption _vo; |
| 342 | 3263 public: |
|
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3264 // _vo == UsePrevMarking -> use "prev" marking information, |
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3265 // _vo == UseNextMarking -> use "next" marking information, |
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3266 // _vo == UseMarkWord -> use mark word from object header. |
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|
3267 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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|
3268 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3269 _g1h = G1CollectedHeap::heap(); |
| 3270 } | |
| 3271 void do_object(oop o) { | |
|
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|
3272 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3273 assert(o != NULL, "Huh?"); |
|
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|
3274 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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|
3275 // If the object is alive according to the mark word, |
|
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|
3276 // then verify that the marking information agrees. |
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|
3277 // Note we can't verify the contra-positive of the |
|
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|
3278 // above: if the object is dead (according to the mark |
|
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|
3279 // word), it may not be marked, or may have been marked |
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|
3280 // but has since became dead, or may have been allocated |
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|
3281 // since the last marking. |
|
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|
3282 if (_vo == VerifyOption_G1UseMarkWord) { |
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|
3283 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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|
3284 } |
|
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|
3285 |
|
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|
3286 o->oop_iterate_no_header(&isLive); |
|
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|
3287 if (!_hr->obj_allocated_since_prev_marking(o)) { |
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|
3288 size_t obj_size = o->size(); // Make sure we don't overflow |
|
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|
3289 _live_bytes += (obj_size * HeapWordSize); |
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|
3290 } |
| 342 | 3291 } |
| 3292 } | |
| 3293 size_t live_bytes() { return _live_bytes; } | |
| 3294 }; | |
| 3295 | |
| 3296 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3297 HeapRegion *_hr; | |
| 3298 G1CollectedHeap *_g1; | |
| 3299 public: | |
| 3300 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3301 _g1 = G1CollectedHeap::heap(); | |
| 3302 }; | |
| 3303 | |
| 3304 void do_object(oop o) { | |
| 3305 if (o != NULL) { | |
| 3306 HeapWord *start = (HeapWord *) o; | |
| 3307 size_t word_sz = o->size(); | |
| 3308 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3309 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3310 (void*) o, word_sz, | |
| 3311 _g1->isMarkedPrev(o), | |
| 3312 _g1->isMarkedNext(o), | |
| 3313 _hr->obj_allocated_since_prev_marking(o)); | |
| 3314 HeapWord *end = start + word_sz; | |
| 3315 HeapWord *cur; | |
| 3316 int *val; | |
| 3317 for (cur = start; cur < end; cur++) { | |
| 3318 val = (int *) cur; | |
| 3319 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3320 } | |
| 3321 } | |
| 3322 } | |
| 3323 }; | |
| 3324 | |
| 3325 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3326 private: |
|
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|
3327 bool _par; |
|
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3328 VerifyOption _vo; |
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3329 bool _failures; |
| 811 | 3330 public: |
|
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|
3331 // _vo == UsePrevMarking -> use "prev" marking information, |
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|
3332 // _vo == UseNextMarking -> use "next" marking information, |
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|
3333 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3334 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3335 : _par(par), | |
|
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3336 _vo(vo), |
|
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|
3337 _failures(false) {} |
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3338 |
|
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|
3339 bool failures() { |
|
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|
3340 return _failures; |
|
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|
3341 } |
|
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|
3342 |
| 342 | 3343 bool doHeapRegion(HeapRegion* r) { |
|
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|
3344 if (!r->continuesHumongous()) { |
|
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|
3345 bool failures = false; |
| 6008 | 3346 r->verify(_vo, &failures); |
|
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|
3347 if (failures) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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diff
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|
3348 _failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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diff
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|
3349 } else { |
|
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7004681: G1: Extend marking verification to Full GCs
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3766
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|
3350 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
1020
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|
3351 r->object_iterate(¬_dead_yet_cl); |
|
4787
2ace1c4ee8da
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diff
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|
3352 if (_vo != VerifyOption_G1UseNextMarking) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3353 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3354 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3355 "max_live_bytes "SIZE_FORMAT" " |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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diff
changeset
|
3356 "< calculated "SIZE_FORMAT, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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changeset
|
3357 r->bottom(), r->end(), |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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changeset
|
3358 r->max_live_bytes(), |
|
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|
3359 not_dead_yet_cl.live_bytes()); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
3360 _failures = true; |
|
2ace1c4ee8da
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parents:
4785
diff
changeset
|
3361 } |
|
2ace1c4ee8da
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4785
diff
changeset
|
3362 } else { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3363 // 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
|
3364 // 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
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|
3365 // finalized yet. |
|
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|
3366 } |
|
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|
3367 } |
| 342 | 3368 } |
|
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|
3369 return false; // stop the region iteration if we hit a failure |
| 342 | 3370 } |
| 3371 }; | |
| 3372 | |
| 12080 | 3373 // This is the task used for parallel verification of the heap regions |
| 390 | 3374 |
| 3375 class G1ParVerifyTask: public AbstractGangTask { | |
| 3376 private: | |
| 3377 G1CollectedHeap* _g1h; | |
|
3772
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|
3378 VerifyOption _vo; |
|
6747fd0512e0
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|
3379 bool _failures; |
| 390 | 3380 |
| 3381 public: | |
|
3772
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|
3382 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
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|
3383 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
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|
3384 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3385 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3386 AbstractGangTask("Parallel verify task"), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
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|
3387 _g1h(g1h), |
|
3772
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|
3388 _vo(vo), |
|
1020
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|
3389 _failures(false) { } |
|
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|
3390 |
|
ff2402f6a50b
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|
3391 bool failures() { |
|
ff2402f6a50b
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diff
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|
3392 return _failures; |
|
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|
3393 } |
| 390 | 3394 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
3395 void work(uint worker_id) { |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3396 HandleMark hm; |
| 6008 | 3397 VerifyRegionClosure blk(true, _vo); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
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diff
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|
3398 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
4095
bca17e38de00
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|
3399 _g1h->workers()->active_workers(), |
| 390 | 3400 HeapRegion::ParVerifyClaimValue); |
|
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|
3401 if (blk.failures()) { |
|
ff2402f6a50b
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diff
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|
3402 _failures = true; |
|
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diff
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|
3403 } |
| 390 | 3404 } |
| 3405 }; | |
| 3406 | |
| 12080 | 3407 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3408 if (SafepointSynchronize::is_at_safepoint()) { |
| 12080 | 3409 assert(Thread::current()->is_VM_thread(), |
| 3410 "Expected to be executed serially by the VM thread at this point"); | |
| 3411 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
3412 if (!silent) { gclog_or_tty->print("Roots "); } |
|
3772
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diff
changeset
|
3413 VerifyRootsClosure rootsCl(vo); |
| 12080 | 3414 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
| 3415 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
3416 VerifyKlassClosure klassCl(this, &rootsCl); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
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diff
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|
3417 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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diff
changeset
|
3418 // We apply the relevant closures to all the oops in the |
|
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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3289
diff
changeset
|
3419 // 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
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4875
diff
changeset
|
3420 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
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|
3421 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
3422 // 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
|
3423 ClassLoaderDataGraph::clear_claimed_marks(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3424 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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parents:
3289
diff
changeset
|
3425 process_strong_roots(true, // activate StrongRootsScope |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3426 false, // we set "is scavenging" to false, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3427 // 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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diff
changeset
|
3428 ScanningOption(so), // roots scanning options |
| 342 | 3429 &rootsCl, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
3430 &blobsCl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3431 &klassCl |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3432 ); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3433 |
| 12080 | 3434 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
|
3772
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7004681: G1: Extend marking verification to Full GCs
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diff
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|
3435 |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
3436 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3437 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3438 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3439 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3440 // the region sets when not in a full GC. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3441 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3442 verify_region_sets(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3443 } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3444 |
| 2152 | 3445 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3446 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3447 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3448 "sanity check"); | |
| 3449 | |
| 6008 | 3450 G1ParVerifyTask task(this, vo); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3451 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
3452 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3453 "If not dynamic should be using all the workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3454 int n_workers = workers()->active_workers(); |
| 390 | 3455 set_par_threads(n_workers); |
| 3456 workers()->run_task(&task); | |
| 3457 set_par_threads(0); | |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3458 if (task.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3459 failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3460 } |
| 390 | 3461 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
3462 // Checks that the expected amount of parallel work was done. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3463 // The implication is that n_workers is > 0. |
| 390 | 3464 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3465 "sanity check"); | |
| 3466 | |
| 3467 reset_heap_region_claim_values(); | |
| 3468 | |
| 3469 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3470 "sanity check"); | |
| 3471 } else { | |
| 6008 | 3472 VerifyRegionClosure blk(false, vo); |
| 3766 | 3473 heap_region_iterate(&blk); |
|
1020
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1019
diff
changeset
|
3474 if (blk.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3475 failures = true; |
|
ff2402f6a50b
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1019
diff
changeset
|
3476 } |
| 390 | 3477 } |
| 2152 | 3478 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3479 rem_set()->verify(); |
|
1020
ff2402f6a50b
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diff
changeset
|
3480 |
| 17764 | 3481 if (G1StringDedup::is_enabled()) { |
| 3482 if (!silent) gclog_or_tty->print("StrDedup "); | |
| 3483 G1StringDedup::verify(); | |
| 3484 } | |
| 3485 | |
|
1020
ff2402f6a50b
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parents:
1019
diff
changeset
|
3486 if (failures) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3487 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3488 // It helps to have the per-region information in the output to |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3489 // help us track down what went wrong. This is why we call |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3490 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3491 print_extended_on(gclog_or_tty); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3492 gclog_or_tty->cr(); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3493 #ifndef PRODUCT |
| 1044 | 3494 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3495 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
3496 vo, false /* all */); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3497 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3498 #endif |
|
1020
ff2402f6a50b
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parents:
1019
diff
changeset
|
3499 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3500 } |
|
ff2402f6a50b
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1019
diff
changeset
|
3501 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3502 } else { |
| 17764 | 3503 if (!silent) { |
| 3504 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
| 3505 if (G1StringDedup::is_enabled()) { | |
| 3506 gclog_or_tty->print(", StrDedup"); | |
| 3507 } | |
| 3508 gclog_or_tty->print(") "); | |
| 3509 } | |
| 342 | 3510 } |
| 3511 } | |
| 3512 | |
| 12080 | 3513 void G1CollectedHeap::verify(bool silent) { |
| 3514 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3515 } | |
| 3516 | |
| 3517 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
| 3518 double verify_time_ms = 0.0; | |
| 3519 | |
| 3520 if (guard && total_collections() >= VerifyGCStartAt) { | |
| 3521 double verify_start = os::elapsedTime(); | |
| 3522 HandleMark hm; // Discard invalid handles created during verification | |
| 3523 prepare_for_verify(); | |
| 3524 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
| 3525 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
| 3526 } | |
| 3527 | |
| 3528 return verify_time_ms; | |
| 3529 } | |
| 3530 | |
| 3531 void G1CollectedHeap::verify_before_gc() { | |
| 3532 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
| 3533 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
| 3534 } | |
| 3535 | |
| 3536 void G1CollectedHeap::verify_after_gc() { | |
| 3537 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
| 3538 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
| 3539 } | |
| 3540 | |
| 342 | 3541 class PrintRegionClosure: public HeapRegionClosure { |
| 3542 outputStream* _st; | |
| 3543 public: | |
| 3544 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3545 bool doHeapRegion(HeapRegion* r) { | |
| 3546 r->print_on(_st); | |
| 3547 return false; | |
| 3548 } | |
| 3549 }; | |
| 3550 | |
|
17833
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8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
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|
3551 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3552 const HeapRegion* hr, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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17774
diff
changeset
|
3553 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3554 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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17774
diff
changeset
|
3555 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3556 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3557 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3558 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3559 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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17774
diff
changeset
|
3560 return false; // keep some compilers happy |
|
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8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3561 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3562 |
|
bfdf528be8e8
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tschatzl
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changeset
|
3563 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
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8038498: Fix includes and C inlining after 8035330
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|
3564 const VerifyOption vo) const { |
|
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8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3565 switch (vo) { |
|
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|
3566 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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changeset
|
3567 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
|
bfdf528be8e8
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diff
changeset
|
3568 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
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|
3569 default: ShouldNotReachHere(); |
|
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|
3570 } |
|
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|
3571 return false; // keep some compilers happy |
|
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diff
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|
3572 } |
|
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|
3573 |
| 342 | 3574 void G1CollectedHeap::print_on(outputStream* st) const { |
|
838
0316eac49d5a
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|
3575 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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diff
changeset
|
3576 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
|
3577 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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|
3578 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
changeset
|
3579 _g1_storage.low_boundary(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
changeset
|
3580 _g1_storage.high(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
changeset
|
3581 _g1_storage.high_boundary()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3582 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3583 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
|
3584 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3585 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
|
3586 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
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diff
changeset
|
3587 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
|
3588 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
|
3589 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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parents:
811
diff
changeset
|
3590 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3591 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
4072
diff
changeset
|
3592 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3593 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3594 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3595 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3596 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
4072
diff
changeset
|
3597 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3598 st->cr(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3599 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
|
3600 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3601 "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
|
3602 "PTAMS=previous top-at-mark-start, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3603 "NTAMS=next top-at-mark-start)"); |
| 342 | 3604 PrintRegionClosure blk(st); |
| 3766 | 3605 heap_region_iterate(&blk); |
| 342 | 3606 } |
| 3607 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3608 void G1CollectedHeap::print_on_error(outputStream* st) const { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3609 this->CollectedHeap::print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3610 |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3611 if (_cm != NULL) { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3612 st->cr(); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3613 _cm->print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3614 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3615 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3616 |
| 342 | 3617 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3618 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3619 workers()->print_worker_threads_on(st); |
| 3620 } | |
| 3621 _cmThread->print_on(st); | |
| 342 | 3622 st->cr(); |
| 1019 | 3623 _cm->print_worker_threads_on(st); |
| 3624 _cg1r->print_worker_threads_on(st); | |
| 17764 | 3625 if (G1StringDedup::is_enabled()) { |
| 3626 G1StringDedup::print_worker_threads_on(st); | |
| 3627 } | |
| 342 | 3628 } |
| 3629 | |
| 3630 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3631 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3632 workers()->threads_do(tc); |
| 3633 } | |
| 3634 tc->do_thread(_cmThread); | |
| 794 | 3635 _cg1r->threads_do(tc); |
| 17764 | 3636 if (G1StringDedup::is_enabled()) { |
| 3637 G1StringDedup::threads_do(tc); | |
| 3638 } | |
| 342 | 3639 } |
| 3640 | |
| 3641 void G1CollectedHeap::print_tracing_info() const { | |
| 3642 // We'll overload this to mean "trace GC pause statistics." | |
| 3643 if (TraceGen0Time || TraceGen1Time) { | |
| 3644 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3645 // to that. | |
| 3646 g1_policy()->print_tracing_info(); | |
| 3647 } | |
| 751 | 3648 if (G1SummarizeRSetStats) { |
| 342 | 3649 g1_rem_set()->print_summary_info(); |
| 3650 } | |
| 1282 | 3651 if (G1SummarizeConcMark) { |
| 342 | 3652 concurrent_mark()->print_summary_info(); |
| 3653 } | |
| 3654 g1_policy()->print_yg_surv_rate_info(); | |
| 3655 SpecializationStats::print(); | |
| 3656 } | |
| 3657 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3658 #ifndef PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3659 // Helpful for debugging RSet issues. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3660 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3661 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3662 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3663 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3664 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3665 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3666 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3667 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3668 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3669 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3670 _occupied_sum += occupied; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3671 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3672 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
|
3673 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3674 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3675 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3676 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3677 hrrs->print(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3678 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3679 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3680 return false; |
|
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 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3683 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3684 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3685 gclog_or_tty->print_cr("========================================"); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3686 gclog_or_tty->print_cr("%s", msg); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3687 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3688 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3689 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3690 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3691 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
|
3692 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3693 gclog_or_tty->cr(); |
|
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 }; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3696 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3697 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3698 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3699 collection_set_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3700 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3701 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3702 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3703 PrintRSetsClosure cl("Printing All RSets");; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3704 heap_region_iterate(&cl); |
|
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 #endif // PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3707 |
| 342 | 3708 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3709 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3710 "not a garbage-first heap"); | |
| 3711 return _g1h; | |
| 3712 } | |
| 3713 | |
| 3714 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3715 // always_do_update_barrier = false; |
| 342 | 3716 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3717 // Fill TLAB's and such | |
| 17727 | 3718 accumulate_statistics_all_tlabs(); |
| 342 | 3719 ensure_parsability(true); |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3720 |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3721 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3722 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3723 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
|
3724 } |
| 342 | 3725 } |
| 3726 | |
| 3727 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3728 |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3729 if (G1SummarizeRSetStats && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3730 (G1SummarizeRSetStatsPeriod > 0) && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3731 // 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
|
3732 ((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
|
3733 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
|
3734 } |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3735 |
| 342 | 3736 // FIXME: what is this about? |
| 3737 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3738 // is set. | |
| 3739 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3740 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3741 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3742 |
| 17727 | 3743 resize_all_tlabs(); |
| 3744 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3745 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3746 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3747 Universe::update_heap_info_at_gc(); |
| 342 | 3748 } |
| 3749 | |
| 1973 | 3750 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3751 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
|
3752 bool* succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3753 GCCause::Cause gc_cause) { |
| 1973 | 3754 assert_heap_not_locked_and_not_at_safepoint(); |
| 342 | 3755 g1_policy()->record_stop_world_start(); |
| 1973 | 3756 VM_G1IncCollectionPause op(gc_count_before, |
| 3757 word_size, | |
| 3758 false, /* should_initiate_conc_mark */ | |
| 3759 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
|
3760 gc_cause); |
| 1973 | 3761 VMThread::execute(&op); |
| 3762 | |
| 3763 HeapWord* result = op.result(); | |
| 3764 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3765 assert(result == NULL || ret_succeeded, | |
| 3766 "the result should be NULL if the VM did not succeed"); | |
| 3767 *succeeded = ret_succeeded; | |
| 3768 | |
| 3769 assert_heap_not_locked(); | |
| 3770 return result; | |
| 342 | 3771 } |
| 3772 | |
| 3773 void | |
| 3774 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3775 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
|
3776 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3777 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3778 CGC_lock->notify(); |
| 342 | 3779 } |
| 3780 } | |
| 3781 | |
| 3782 size_t G1CollectedHeap::pending_card_num() { | |
| 3783 size_t extra_cards = 0; | |
| 3784 JavaThread *curr = Threads::first(); | |
| 3785 while (curr != NULL) { | |
| 3786 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3787 extra_cards += dcq.size(); | |
| 3788 curr = curr->next(); | |
| 3789 } | |
| 3790 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3791 size_t buffer_size = dcqs.buffer_size(); | |
| 3792 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3793 |
| 3794 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3795 // in bytes - not the number of 'entries'. We need to convert | |
| 3796 // into a number of cards. | |
| 3797 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3798 } |
| 3799 | |
| 3800 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3801 return g1_rem_set()->cardsScanned(); |
| 342 | 3802 } |
| 3803 | |
| 3804 void | |
| 3805 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3806 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3807 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3808 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3809 if (_surviving_young_words == NULL) { |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3810 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
| 342 | 3811 "Not enough space for young surv words summary."); |
| 3812 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3813 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
|
3814 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3815 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
|
3816 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3817 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3818 #endif // !ASSERT |
| 342 | 3819 } |
| 3820 | |
| 3821 void | |
| 3822 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3823 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
|
3824 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
|
3825 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3826 _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
|
3827 } |
| 342 | 3828 } |
| 3829 | |
| 3830 void | |
| 3831 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3832 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3833 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3834 _surviving_young_words = NULL; |
| 3835 } | |
| 3836 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3837 #ifdef ASSERT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3838 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3839 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3840 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3841 // 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
|
3842 // 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
|
3843 // 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
|
3844 // 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
|
3845 // 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
|
3846 // 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
|
3847 // 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
|
3848 // 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
|
3849 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3850 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
|
3851 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3852 // 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
|
3853 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3854 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3855 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3856 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3857 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3858 |
| 1709 | 3859 #if TASKQUEUE_STATS |
| 3860 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3861 st->print_raw_cr("GC Task Stats"); | |
| 3862 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3863 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3864 } | |
| 3865 | |
| 3866 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3867 print_taskqueue_stats_hdr(st); | |
| 3868 | |
| 3869 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3870 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3871 for (int i = 0; i < n; ++i) { |
| 3872 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3873 totals += task_queue(i)->stats; | |
| 3874 } | |
| 3875 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3876 | |
| 3877 DEBUG_ONLY(totals.verify()); | |
| 3878 } | |
| 3879 | |
| 3880 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3881 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3882 for (int i = 0; i < n; ++i) { |
| 3883 task_queue(i)->stats.reset(); | |
| 3884 } | |
| 3885 } | |
| 3886 #endif // TASKQUEUE_STATS | |
| 3887 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3888 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3889 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3890 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3891 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3892 |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3893 gclog_or_tty->gclog_stamp(_gc_tracer_stw->gc_id()); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3894 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3895 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
|
3896 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3897 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3898 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3899 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3900 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3901 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3902 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3903 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3904 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3905 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3906 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3907 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3908 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3909 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3910 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3911 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
|
3912 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3913 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3914 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3915 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3916 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3917 gclog_or_tty->print("--"); |
|
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 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3920 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
|
3921 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3922 gclog_or_tty->flush(); |
|
6752
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 |
| 1973 | 3925 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3926 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3927 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3928 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3929 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3930 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3931 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3932 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3933 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3934 _gc_timer_stw->register_gc_start(); |
| 10405 | 3935 |
| 3936 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
| 3937 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3938 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3939 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3940 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3941 print_heap_before_gc(); |
| 10405 | 3942 trace_heap_before_gc(_gc_tracer_stw); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3943 |
| 2152 | 3944 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3945 verify_dirty_young_regions(); |
| 2152 | 3946 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3947 // 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
|
3948 // 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
|
3949 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3950 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3951 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3952 // 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
|
3953 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3954 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3955 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3956 // 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
|
3957 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
|
3958 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3959 // 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
|
3960 // 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
|
3961 // 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
|
3962 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
|
3963 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3964 // 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
|
3965 { |
| 10405 | 3966 EvacuationInfo evacuation_info; |
| 3967 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3968 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3969 // 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
|
3970 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3971 increment_old_marking_cycles_started(); |
| 10405 | 3972 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
|
3973 } |
| 10405 | 3974 |
| 3975 _gc_tracer_stw->report_yc_type(yc_type()); | |
| 3976 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3977 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3978 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3979 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
|
3980 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
|
3981 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
|
3982 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3983 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3984 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3985 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3986 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3987 |
| 2361 | 3988 // If the secondary_free_list is not empty, append it to the |
| 3989 // free_list. No need to wait for the cleanup operation to finish; | |
| 3990 // the region allocation code will check the secondary_free_list | |
| 3991 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3992 // set, skip this step so that the region allocation code has to | |
| 3993 // get entries from the secondary_free_list. | |
| 2152 | 3994 if (!G1StressConcRegionFreeing) { |
| 2361 | 3995 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3996 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3997 |
| 12080 | 3998 assert(check_young_list_well_formed(), "young list should be well formed"); |
| 3999 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 4000 "sanity check"); | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4001 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4002 // 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
|
4003 // 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
|
4004 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4005 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4006 { // 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
|
4007 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4008 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4009 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4010 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
|
4011 increment_gc_time_stamp(); |
| 342 | 4012 |
|
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
|
4013 verify_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4014 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4015 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4016 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4017 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4018 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4019 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4020 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4021 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4027 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4028 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4029 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4030 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 // 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
|
4033 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4034 release_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4035 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4036 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4038 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4039 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4040 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4041 // 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
|
4042 // 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
|
4043 // 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
|
4044 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4045 // 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
|
4046 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4047 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4048 // 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
|
4049 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4050 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4051 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4052 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4053 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4054 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
|
4055 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4056 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4057 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
|
4058 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4059 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4060 // 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
|
4061 // 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
|
4062 // 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
|
4063 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4064 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
|
4065 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4066 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4067 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
|
4068 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
|
4069 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4070 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
|
4071 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4072 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4073 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4074 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4075 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4076 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4077 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4078 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4080 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4081 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4082 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 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
|
4085 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4086 |
| 10405 | 4087 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4088 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4089 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4090 // 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
|
4091 // 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
|
4092 // 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
|
4093 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4094 _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
|
4095 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4096 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4097 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4098 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4099 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4100 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4101 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4103 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4104 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4105 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4106 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4107 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4108 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4109 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4110 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4111 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4112 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4113 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4114 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4115 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4117 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4118 #endif // ASSERT |
| 1707 | 4119 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4120 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4121 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 // Initialize the GC alloc regions. |
| 10405 | 4123 init_gc_alloc_regions(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 // Actually do the work... |
| 10405 | 4126 evacuate_collection_set(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4128 // 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
|
4129 // (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
|
4130 // 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
|
4131 // 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
|
4132 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4133 _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
|
4134 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4135 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4136 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4137 |
| 10405 | 4138 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4139 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4140 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4141 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4142 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4143 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4144 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4145 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4146 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4147 // regions to the incremental collection set for the next |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4148 // evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4149 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4150 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4151 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4152 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4155 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 "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
|
4159 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4160 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4163 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4164 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4165 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
| 10405 | 4166 _young_list->first_survivor_region(), |
| 4167 _young_list->last_survivor_region()); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 _summary_bytes_used = recalculate_used(); |
| 10405 | 4173 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
| 4174 for (uint i = 0; i < n_queues; i++) { | |
| 4175 if (_evacuation_failed_info_array[i].has_failed()) { | |
| 4176 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
| 4177 } | |
| 4178 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4179 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4180 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4181 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4182 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4183 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4184 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4185 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4186 // 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
|
4187 // 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
|
4188 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4189 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4190 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4191 // 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
|
4192 // 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
|
4193 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4194 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4195 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4196 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4197 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4198 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4199 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4200 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4201 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
|
4202 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4203 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4204 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4205 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4206 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4207 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4208 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4209 size_t bytes_before = capacity(); |
| 4785 | 4210 // No need for an ergo verbose message here, |
| 4211 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4212 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4213 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4214 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4215 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4216 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4217 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4218 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4219 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4220 |
| 10405 | 4221 // 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
|
4222 // 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
|
4223 _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
|
4224 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4225 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4226 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4227 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4228 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4229 // 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
|
4230 // 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
|
4231 // 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
|
4232 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
|
4233 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
| 10405 | 4234 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
|
4235 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4236 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4237 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4238 // 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
|
4239 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4240 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4241 // 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
|
4242 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4243 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4244 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4245 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4246 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4247 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4248 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4249 // 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
|
4250 // 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
|
4251 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4252 // 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
|
4253 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4254 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4255 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4256 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4257 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4258 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4259 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4260 |
|
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
|
4261 verify_after_gc(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4262 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4263 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4264 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4265 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4266 // 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
|
4267 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4268 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4269 // 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
|
4270 // 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
|
4271 // 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
|
4272 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4273 _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
|
4274 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4275 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4276 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4277 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4278 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4279 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4280 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4281 #endif |
| 342 | 4282 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4283 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4284 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4285 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4286 // 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
|
4287 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
|
4288 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4289 // 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
|
4290 // 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
|
4291 // 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
|
4292 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4293 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4294 _hrs.verify_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4295 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4296 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4297 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
|
4298 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4299 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4300 print_heap_after_gc(); |
| 10405 | 4301 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
|
4302 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4303 // 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
|
4304 // 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
|
4305 // 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
|
4306 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4307 g1mm()->update_sizes(); |
| 10405 | 4308 |
| 4309 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
| 4310 _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
|
4311 _gc_timer_stw->register_gc_end(); |
| 10405 | 4312 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
| 4313 } | |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4314 // 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
|
4315 // 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
|
4316 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4317 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4318 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4319 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4320 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4321 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4322 // 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
|
4323 // 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
|
4324 // not start until the safepoint itself is released in |
| 20192 | 4325 // SuspendibleThreadSet::desynchronize(). |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4326 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4327 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4328 |
| 1973 | 4329 return true; |
| 342 | 4330 } |
| 4331 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4332 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4333 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4334 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4335 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4336 case GCAllocForSurvived: |
| 6595 | 4337 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4338 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4339 case GCAllocForTenured: |
| 6595 | 4340 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4341 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4342 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4343 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4344 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4345 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4346 } |
| 6595 | 4347 |
| 4348 // Prevent humongous PLAB sizes for two reasons: | |
| 4349 // * PLABs are allocated using a similar paths as oops, but should | |
| 4350 // never be in a humongous region | |
| 4351 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4352 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
|
4353 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4354 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4355 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4356 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4357 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4358 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4359 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4360 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4361 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4362 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4363 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4364 |
| 10405 | 4365 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
|
4366 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
|
4367 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4368 _survivor_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4369 _old_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4370 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
|
4371 _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
|
4372 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4373 // 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
|
4374 // 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
|
4375 // 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
|
4376 // 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
|
4377 // 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
|
4378 // 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
|
4379 // during a cleanup and was added to the free list, but |
| 10405 | 4380 // 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
|
4381 // 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
|
4382 if (retained_region != NULL && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4383 !retained_region->in_collection_set() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4384 !(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
|
4385 !retained_region->is_empty() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4386 !retained_region->isHumongous()) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4387 retained_region->set_saved_mark(); |
| 4072 | 4388 // The retained region was added to the old region set when it was |
| 4389 // retired. We have to remove it now, since we don't allow regions | |
| 4390 // we allocate to in the region sets. We'll re-add it later, when | |
| 4391 // it's retired again. | |
| 4392 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4393 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
|
4394 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
|
4395 _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
|
4396 _hr_printer.reuse(retained_region); |
| 10405 | 4397 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
| 4398 } | |
| 4399 } | |
| 4400 | |
| 4401 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { | |
| 4402 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
| 4403 _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
|
4404 _survivor_gc_alloc_region.release(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4405 // 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
|
4406 // _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
|
4407 // _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
|
4408 // 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
|
4409 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4410 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 6595 | 4411 |
| 4412 if (ResizePLAB) { | |
| 6819 | 4413 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
| 4414 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
| 6595 | 4415 } |
| 342 | 4416 } |
| 4417 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4418 void G1CollectedHeap::abandon_gc_alloc_regions() { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4419 assert(_survivor_gc_alloc_region.get() == NULL, "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4420 assert(_old_gc_alloc_region.get() == NULL, "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4421 _retained_old_gc_alloc_region = NULL; |
| 342 | 4422 } |
| 4423 | |
| 4424 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4425 _drain_in_progress = false; | |
| 4426 set_evac_failure_closure(cl); | |
| 6197 | 4427 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4428 } |
| 4429 | |
| 4430 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4431 assert(_evac_failure_scan_stack != NULL && | |
| 4432 _evac_failure_scan_stack->length() == 0, | |
| 4433 "Postcondition"); | |
| 4434 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4435 delete _evac_failure_scan_stack; |
| 342 | 4436 _evac_failure_scan_stack = NULL; |
| 4437 } | |
| 4438 | |
| 4439 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
|
4440 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4441 |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4442 double remove_self_forwards_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4443 |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4444 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4445 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4446 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4447 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4448 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4449 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4450 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4451 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4452 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4453 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4454 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
|
4455 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4456 // 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
|
4457 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4458 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4459 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4460 |
| 4461 // Now restore saved marks, if any. | |
|
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4462 assert(_objs_with_preserved_marks.size() == |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4463 _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
|
4464 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
|
4465 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
|
4466 markOop m = _preserved_marks_of_objs.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4467 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
|
4468 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4469 _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
|
4470 _preserved_marks_of_objs.clear(true); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4471 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4472 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
| 342 | 4473 } |
| 4474 | |
| 4475 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4476 _evac_failure_scan_stack->push(obj); | |
| 4477 } | |
| 4478 | |
| 4479 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4480 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4481 | |
| 4482 while (_evac_failure_scan_stack->length() > 0) { | |
| 4483 oop obj = _evac_failure_scan_stack->pop(); | |
| 4484 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4485 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4486 } | |
| 4487 } | |
| 4488 | |
| 4489 oop | |
| 10405 | 4490 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
|
4491 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
|
4492 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
|
4493 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
|
4494 (HeapWord*) old)); |
| 342 | 4495 markOop m = old->mark(); |
| 4496 oop forward_ptr = old->forward_to_atomic(old); | |
| 4497 if (forward_ptr == NULL) { | |
| 4498 // Forward-to-self succeeded. | |
| 10405 | 4499 assert(_par_scan_state != NULL, "par scan state"); |
| 4500 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
| 4501 uint queue_num = _par_scan_state->queue_num(); | |
| 4502 | |
| 4503 _evacuation_failed = true; | |
| 4504 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
| 342 | 4505 if (_evac_failure_closure != cl) { |
| 4506 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4507 assert(!_drain_in_progress, | |
| 4508 "Should only be true while someone holds the lock."); | |
| 4509 // Set the global evac-failure closure to the current thread's. | |
| 4510 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4511 set_evac_failure_closure(cl); | |
| 4512 // Now do the common part. | |
| 4513 handle_evacuation_failure_common(old, m); | |
| 4514 // Reset to NULL. | |
| 4515 set_evac_failure_closure(NULL); | |
| 4516 } else { | |
| 4517 // The lock is already held, and this is recursive. | |
| 4518 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4519 handle_evacuation_failure_common(old, m); | |
| 4520 } | |
| 4521 return old; | |
| 4522 } 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
|
4523 // 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
|
4524 // 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
|
4525 // 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
|
4526 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
|
4527 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
|
4528 "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
|
4529 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4530 return forward_ptr; |
| 4531 } | |
| 4532 } | |
| 4533 | |
| 4534 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4535 preserve_mark_if_necessary(old, m); | |
| 4536 | |
| 4537 HeapRegion* r = heap_region_containing(old); | |
| 4538 if (!r->evacuation_failed()) { | |
| 4539 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4540 _hr_printer.evac_failure(r); |
| 342 | 4541 } |
| 4542 | |
| 4543 push_on_evac_failure_scan_stack(old); | |
| 4544 | |
| 4545 if (!_drain_in_progress) { | |
| 4546 // prevent recursion in copy_to_survivor_space() | |
| 4547 _drain_in_progress = true; | |
| 4548 drain_evac_failure_scan_stack(); | |
| 4549 _drain_in_progress = false; | |
| 4550 } | |
| 4551 } | |
| 4552 | |
| 4553 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
|
4554 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4555 // 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
|
4556 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4557 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
|
4558 _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
|
4559 _preserved_marks_of_objs.push(m); |
| 342 | 4560 } |
| 4561 } | |
| 4562 | |
| 4563 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4564 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4565 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4566 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
|
4567 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4568 return result; |
| 342 | 4569 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4570 // 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
|
4571 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4572 return old_attempt_allocation(word_size); |
| 342 | 4573 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4574 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4575 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4576 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
|
4577 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4578 return result; |
| 342 | 4579 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4580 // 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
|
4581 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4582 return survivor_attempt_allocation(word_size); |
| 342 | 4583 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4584 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4585 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4586 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4587 // 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
|
4588 return NULL; |
| 342 | 4589 } |
| 4590 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4591 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
|
4592 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4593 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4594 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
|
4595 : _g1h(g1h), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4596 _refs(g1h->task_queue(queue_num)), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4597 _dcq(&g1h->dirty_card_queue_set()), |
| 12343 | 4598 _ct_bs(g1h->g1_barrier_set()), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4599 _g1_rem(g1h->g1_rem_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4600 _hash_seed(17), _queue_num(queue_num), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4601 _term_attempts(0), |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4602 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4603 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4604 _age_table(false), _scanner(g1h, this, rp), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4605 _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
|
4606 _alloc_buffer_waste(0), _undo_waste(0) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4607 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4608 // 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
|
4609 // non-young regions (where the age is -1) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4610 // 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
|
4611 // an attempt to eliminate cache contention |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4612 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
|
4613 uint array_length = PADDING_ELEM_NUM + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4614 real_length + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4615 PADDING_ELEM_NUM; |
| 6197 | 4616 _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
|
4617 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
|
4618 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
|
4619 "Not enough space for young surv histo."); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4620 _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
|
4621 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
|
4622 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4623 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4624 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4625 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4626 _start = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4627 } |
| 342 | 4628 |
| 1709 | 4629 void |
| 4630 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
| 4631 { | |
| 4632 st->print_raw_cr("GC Termination Stats"); | |
| 4633 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
| 4634 " ------waste (KiB)------"); | |
| 4635 st->print_raw_cr("thr ms ms % ms % attempts" | |
| 4636 " total alloc undo"); | |
| 4637 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
| 4638 " ------- ------- -------"); | |
| 4639 } | |
| 4640 | |
| 4641 void | |
| 4642 G1ParScanThreadState::print_termination_stats(int i, | |
| 4643 outputStream* const st) const | |
| 4644 { | |
| 4645 const double elapsed_ms = elapsed_time() * 1000.0; | |
| 4646 const double s_roots_ms = strong_roots_time() * 1000.0; | |
| 4647 const double term_ms = term_time() * 1000.0; | |
| 4648 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
| 4649 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
| 4650 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
| 4651 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
| 4652 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
| 4653 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
| 4654 alloc_buffer_waste() * HeapWordSize / K, | |
| 4655 undo_waste() * HeapWordSize / K); | |
| 4656 } | |
| 4657 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4658 #ifdef ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4659 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4660 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4661 assert(UseCompressedOops, "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4662 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4663 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4664 assert(_g1h->is_in_g1_reserved(p), |
|
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4665 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4666 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4667 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4668 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4669 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4670 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4671 if (has_partial_array_mask(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4672 // Must be in the collection set--it's already been copied. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4673 oop p = clear_partial_array_mask(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4674 assert(_g1h->obj_in_cs(p), |
|
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4675 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4676 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4677 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4678 assert(_g1h->is_in_g1_reserved(p), |
|
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4679 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4680 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4681 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4682 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4683 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4684 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4685 if (ref.is_narrow()) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4686 return verify_ref((narrowOop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4687 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4688 return verify_ref((oop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4689 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4690 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4691 #endif // ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4692 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4693 void G1ParScanThreadState::trim_queue() { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4694 assert(_evac_failure_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4695 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4696 StarTask ref; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4697 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4698 // Drain the overflow stack first, so other threads can steal. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4699 while (refs()->pop_overflow(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4700 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4701 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4702 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4703 while (refs()->pop_local(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4704 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4705 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4706 } while (!refs()->is_empty()); |
|
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 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4709 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4710 G1ParScanThreadState* par_scan_state) : |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4711 _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
|
4712 _worker_id(par_scan_state->queue_num()) { } |
|
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4713 |
|
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4714 void G1ParCopyHelper::mark_object(oop obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4715 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4716 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4717 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4718 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
|
4719 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4720 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4721 // 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
|
4722 _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
|
4723 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4724 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4725 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
|
4726 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4727 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
|
4728 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
|
4729 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
|
4730 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4731 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
|
4732 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4733 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
|
4734 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4735 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
|
4736 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4737 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
|
4738 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4739 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4740 // 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
|
4741 // 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
|
4742 // 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
|
4743 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4744 _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
|
4745 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4746 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4747 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
|
4748 size_t word_sz = old->size(); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4749 HeapRegion* from_region = _g1h->heap_region_containing_raw(old); |
| 342 | 4750 // +1 to make the -1 indexes valid... |
| 4751 int young_index = from_region->young_index_in_cset()+1; | |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
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|
4752 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
|
4753 (!from_region->is_young() && young_index == 0), "invariant" ); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
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diff
changeset
|
4754 G1CollectorPolicy* g1p = _g1h->g1_policy(); |
| 342 | 4755 markOop m = old->mark(); |
| 545 | 4756 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
| 4757 : m->age(); | |
| 4758 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
| 342 | 4759 word_sz); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
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17688
diff
changeset
|
4760 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
|
4761 #ifndef PRODUCT |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4762 // Should this evacuation fail? |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4763 if (_g1h->evacuation_should_fail()) { |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4764 if (obj_ptr != NULL) { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4765 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
|
4766 obj_ptr = NULL; |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4767 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4768 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
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parents:
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diff
changeset
|
4769 #endif // !PRODUCT |
| 342 | 4770 |
| 4771 if (obj_ptr == NULL) { | |
| 4772 // This will either forward-to-self, or detect that someone else has | |
| 4773 // installed a forwarding pointer. | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4774 return _g1h->handle_evacuation_failure_par(this, old); |
| 342 | 4775 } |
| 4776 | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
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parents:
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diff
changeset
|
4777 oop obj = oop(obj_ptr); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
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parents:
6628
diff
changeset
|
4778 |
| 526 | 4779 // We're going to allocate linearly, so might as well prefetch ahead. |
| 4780 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
| 4781 | |
| 342 | 4782 oop forward_ptr = old->forward_to_atomic(obj); |
| 4783 if (forward_ptr == NULL) { | |
| 4784 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
|
4785 |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4786 // 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
|
4787 // 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
|
4788 HeapRegion* to_region = _g1h->heap_region_containing_raw(obj_ptr); |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
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parents:
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diff
changeset
|
4789 alloc_purpose = to_region->is_young() ? GCAllocForSurvived : GCAllocForTenured; |
|
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
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parents:
17748
diff
changeset
|
4790 |
| 526 | 4791 if (g1p->track_object_age(alloc_purpose)) { |
| 4792 // We could simply do obj->incr_age(). However, this causes a | |
| 4793 // performance issue. obj->incr_age() will first check whether | |
| 4794 // the object has a displaced mark by checking its mark word; | |
| 4795 // getting the mark word from the new location of the object | |
| 4796 // stalls. So, given that we already have the mark word and we | |
| 4797 // are about to install it anyway, it's better to increase the | |
| 4798 // age on the mark word, when the object does not have a | |
| 4799 // displaced mark word. We're not expecting many objects to have | |
| 4800 // a displaced marked word, so that case is not optimized | |
| 4801 // further (it could be...) and we simply call obj->incr_age(). | |
| 4802 | |
| 4803 if (m->has_displaced_mark_helper()) { | |
| 4804 // in this case, we have to install the mark word first, | |
| 4805 // otherwise obj looks to be forwarded (the old mark word, | |
| 4806 // which contains the forward pointer, was copied) | |
| 4807 obj->set_mark(m); | |
| 4808 obj->incr_age(); | |
| 4809 } else { | |
| 4810 m = m->incr_age(); | |
| 545 | 4811 obj->set_mark(m); |
| 526 | 4812 } |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4813 age_table()->add(obj, word_sz); |
| 545 | 4814 } else { |
| 4815 obj->set_mark(m); | |
| 526 | 4816 } |
| 4817 | |
| 17764 | 4818 if (G1StringDedup::is_enabled()) { |
| 4819 G1StringDedup::enqueue_from_evacuation(from_region->is_young(), | |
| 4820 to_region->is_young(), | |
| 4821 queue_num(), | |
| 4822 obj); | |
| 4823 } | |
| 4824 | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
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diff
changeset
|
4825 size_t* surv_young_words = surviving_young_words(); |
| 342 | 4826 surv_young_words[young_index] += word_sz; |
| 4827 | |
| 4828 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
|
4829 // 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
|
4830 // 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
|
4831 // 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
|
4832 arrayOop(obj)->set_length(0); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
838
diff
changeset
|
4833 oop* old_p = set_partial_array_mask(old); |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4834 push_on_queue(old_p); |
| 342 | 4835 } else { |
| 526 | 4836 // No point in using the slower heap_region_containing() method, |
| 4837 // 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
|
4838 _scanner.set_region(_g1h->heap_region_containing_raw(obj)); |
| 5987 | 4839 obj->oop_iterate_backwards(&_scanner); |
| 342 | 4840 } |
| 4841 } else { | |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4842 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
| 342 | 4843 obj = forward_ptr; |
| 4844 } | |
| 4845 return obj; | |
| 4846 } | |
| 4847 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4848 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4849 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
|
4850 if (_g1->heap_region_containing_raw(new_obj)->is_young()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
4851 _scanned_klass->record_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4852 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4853 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4854 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4855 template <G1Barrier barrier, bool do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
838
diff
changeset
|
4856 template <class T> |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4857 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
|
4858 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
|
4859 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4860 if (oopDesc::is_null(heap_oop)) { |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4861 return; |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4862 } |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4863 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4864 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
|
4865 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4866 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4867 |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4868 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
|
4869 oop forwardee; |
| 526 | 4870 if (obj->is_forwarded()) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4871 forwardee = obj->forwardee(); |
| 526 | 4872 } else { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4873 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
| 342 | 4874 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4875 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
|
4876 oopDesc::encode_store_heap_oop(p, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4877 if (do_mark_object && forwardee != obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4878 // 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
|
4879 // 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
|
4880 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4881 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4882 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4883 if (barrier == G1BarrierKlass) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4884 do_klass_barrier(p, forwardee); |
| 342 | 4885 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4886 } else { |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4887 // 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
|
4888 // 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
|
4889 // 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
|
4890 if (do_mark_object) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4891 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4892 } |
| 526 | 4893 } |
| 4894 | |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4895 if (barrier == G1BarrierEvac) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4896 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4897 } |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4898 } |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4899 |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4900 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
|
4901 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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838
diff
changeset
|
4902 |
| 342 | 4903 class G1ParEvacuateFollowersClosure : public VoidClosure { |
| 4904 protected: | |
| 4905 G1CollectedHeap* _g1h; | |
| 4906 G1ParScanThreadState* _par_scan_state; | |
| 4907 RefToScanQueueSet* _queues; | |
| 4908 ParallelTaskTerminator* _terminator; | |
| 4909 | |
| 4910 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4911 RefToScanQueueSet* queues() { return _queues; } | |
| 4912 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4913 | |
| 4914 public: | |
| 4915 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4916 G1ParScanThreadState* par_scan_state, | |
| 4917 RefToScanQueueSet* queues, | |
| 4918 ParallelTaskTerminator* terminator) | |
| 4919 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4920 _queues(queues), _terminator(terminator) {} | |
| 4921 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4922 void do_void(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4923 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4924 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4925 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4926 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4927 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4928 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4929 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4930 pss->start_term_time(); |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
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|
4931 const bool res = terminator()->offer_termination(); |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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diff
changeset
|
4932 pss->end_term_time(); |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4933 return res; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4934 } |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
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diff
changeset
|
4935 |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4936 void G1ParEvacuateFollowersClosure::do_void() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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diff
changeset
|
4937 StarTask stolen_task; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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diff
changeset
|
4938 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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diff
changeset
|
4939 pss->trim_queue(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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diff
changeset
|
4940 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4941 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
changeset
|
4942 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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changeset
|
4943 assert(pss->verify_task(stolen_task), "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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changeset
|
4944 if (stolen_task.is_narrow()) { |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4945 pss->deal_with_reference((narrowOop*) stolen_task); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
changeset
|
4946 } else { |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
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diff
changeset
|
4947 pss->deal_with_reference((oop*) stolen_task); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
changeset
|
4948 } |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4949 |
|
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
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changeset
|
4950 // We've just processed a reference and we might have made |
|
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
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changeset
|
4951 // available new entries on the queues. So we have to make sure |
|
35e4e086d5f5
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|
4952 // we drain the queues as necessary. |
| 342 | 4953 pss->trim_queue(); |
| 4954 } | |
|
1862
b14ec34b1e07
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diff
changeset
|
4955 } while (!offer_termination()); |
|
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jcoomes
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diff
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|
4956 |
|
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diff
changeset
|
4957 pss->retire_alloc_buffers(); |
|
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|
4958 } |
| 342 | 4959 |
|
6725
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|
4960 class G1KlassScanClosure : public KlassClosure { |
|
da91efe96a93
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|
4961 G1ParCopyHelper* _closure; |
|
da91efe96a93
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|
4962 bool _process_only_dirty; |
|
da91efe96a93
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|
4963 int _count; |
|
da91efe96a93
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|
4964 public: |
|
da91efe96a93
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|
4965 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
|
da91efe96a93
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|
4966 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4967 void do_klass(Klass* klass) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4968 // If the klass has not been dirtied we know that there's |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4969 // no references into the young gen and we can skip it. |
|
da91efe96a93
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|
4970 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4971 // Clean the klass since we're going to scavenge all the metadata. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4972 klass->clear_modified_oops(); |
|
da91efe96a93
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|
4973 |
|
da91efe96a93
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changeset
|
4974 // Tell the closure that this klass is the Klass to scavenge |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4975 // and is the one to dirty if oops are left pointing into the young gen. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4976 _closure->set_scanned_klass(klass); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4977 |
|
da91efe96a93
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changeset
|
4978 klass->oops_do(_closure); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
4979 |
|
da91efe96a93
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changeset
|
4980 _closure->set_scanned_klass(NULL); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
4981 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4982 _count++; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4983 } |
|
da91efe96a93
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coleenp
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diff
changeset
|
4984 }; |
|
da91efe96a93
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changeset
|
4985 |
| 342 | 4986 class G1ParTask : public AbstractGangTask { |
| 4987 protected: | |
| 4988 G1CollectedHeap* _g1h; | |
| 4989 RefToScanQueueSet *_queues; | |
| 4990 ParallelTaskTerminator _terminator; | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4991 uint _n_workers; |
| 342 | 4992 |
| 4993 Mutex _stats_lock; | |
| 4994 Mutex* stats_lock() { return &_stats_lock; } | |
| 4995 | |
| 4996 size_t getNCards() { | |
| 4997 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 4998 / G1BlockOffsetSharedArray::N_bytes; | |
| 4999 } | |
| 5000 | |
| 5001 public: | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5002 G1ParTask(G1CollectedHeap* g1h, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
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diff
changeset
|
5003 RefToScanQueueSet *task_queues) |
| 342 | 5004 : AbstractGangTask("G1 collection"), |
| 5005 _g1h(g1h), | |
| 5006 _queues(task_queues), | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5007 _terminator(0, _queues), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5008 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 5009 {} |
| 5010 | |
| 5011 RefToScanQueueSet* queues() { return _queues; } | |
| 5012 | |
| 5013 RefToScanQueue *work_queue(int i) { | |
| 5014 return queues()->queue(i); | |
| 5015 } | |
| 5016 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5017 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5018 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5019 virtual void set_for_termination(int active_workers) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5020 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5021 // in the young space (_par_seq_tasks) in the G1 heap |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
5022 // for SequentialSubTasksDone. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5023 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5024 // both of which need setting by set_n_termination(). |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5025 _g1h->SharedHeap::set_n_termination(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
5026 _g1h->set_n_termination(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5027 terminator()->reset_for_reuse(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5028 _n_workers = active_workers; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5029 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5030 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5031 void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5032 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 5033 |
| 5034 double start_time_ms = os::elapsedTime() * 1000.0; | |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5035 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 5036 |
|
5986
500023bd0818
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5963
diff
changeset
|
5037 { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5038 ResourceMark rm; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5039 HandleMark hm; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5040 |
|
500023bd0818
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5963
diff
changeset
|
5041 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
5042 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5043 G1ParScanThreadState pss(_g1h, worker_id, rp); |
|
5986
500023bd0818
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parents:
5963
diff
changeset
|
5044 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5045 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5046 pss.set_evac_failure_closure(&evac_failure_cl); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5047 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
5048 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
|
6725
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coleenp
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changeset
|
5049 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
|
5986
500023bd0818
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5963
diff
changeset
|
5050 |
|
500023bd0818
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5963
diff
changeset
|
5051 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
|
6725
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changeset
|
5052 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
|
da91efe96a93
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changeset
|
5053 |
|
da91efe96a93
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diff
changeset
|
5054 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
5055 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
|
da91efe96a93
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changeset
|
5056 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
|
5986
500023bd0818
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5963
diff
changeset
|
5057 |
|
500023bd0818
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5963
diff
changeset
|
5058 OopClosure* scan_root_cl = &only_scan_root_cl; |
|
6725
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changeset
|
5059 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
|
5986
500023bd0818
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diff
changeset
|
5060 |
|
500023bd0818
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5963
diff
changeset
|
5061 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5062 // We also need to mark copied objects. |
|
500023bd0818
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5963
diff
changeset
|
5063 scan_root_cl = &scan_mark_root_cl; |
|
6725
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coleenp
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changeset
|
5064 scan_klasses_cl = &scan_mark_klasses_cl_s; |
|
5986
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5963
diff
changeset
|
5065 } |
|
500023bd0818
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5963
diff
changeset
|
5066 |
|
500023bd0818
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parents:
5963
diff
changeset
|
5067 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
500023bd0818
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parents:
5963
diff
changeset
|
5068 |
| 12080 | 5069 // Don't scan the scavengable methods in the code cache as part |
| 5070 // of strong root scanning. The code roots that point into a | |
| 5071 // region in the collection set are scanned when we scan the | |
| 5072 // region's RSet. | |
| 5073 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5074 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5075 pss.start_strong_roots(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5076 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5077 SharedHeap::ScanningOption(so), |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5078 scan_root_cl, |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5079 &push_heap_rs_cl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5080 scan_klasses_cl, |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5081 worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5082 pss.end_strong_roots(); |
|
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 { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5085 double start = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5086 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5087 evac.do_void(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5088 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
|
5089 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
|
5090 _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
|
5091 _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
|
5092 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5093 _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
|
5094 _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
|
5095 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5096 if (ParallelGCVerbose) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5097 MutexLocker x(stats_lock()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5098 pss.print_termination_stats(worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5099 } |
|
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 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
|
5102 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5103 // 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
|
5104 // 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
|
5105 // "GC Worker Time". |
| 342 | 5106 } |
| 5107 | |
| 1611 | 5108 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
|
5109 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 5110 } |
| 5111 }; | |
| 5112 | |
| 5113 // *** Common G1 Evacuation Stuff | |
| 5114 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5115 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5116 |
| 342 | 5117 void |
| 5118 G1CollectedHeap:: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5119 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
|
5120 ScanningOption so, |
| 342 | 5121 OopClosure* scan_non_heap_roots, |
| 5122 OopsInHeapRegionClosure* scan_rs, | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5123 G1KlassScanClosure* scan_klasses, |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
5124 uint worker_i) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5125 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5126 // First scan the strong roots |
| 342 | 5127 double ext_roots_start = os::elapsedTime(); |
| 5128 double closure_app_time_sec = 0.0; | |
| 5129 | |
| 5130 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
| 5131 | |
| 12080 | 5132 assert(so & SO_CodeCache || scan_rs != NULL, "must scan code roots somehow"); |
| 5133 // Walk the code cache/strong code roots w/o buffering, because StarTask | |
| 5134 // cannot handle unaligned oop locations. | |
| 5135 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
|
5136 |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5137 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
|
5138 is_scavenging, so, |
| 342 | 5139 &buf_scan_non_heap_roots, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5140 &eager_scan_code_roots, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5141 scan_klasses |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5142 ); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5143 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5144 // 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
|
5145 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
|
5146 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5147 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5148 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5149 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5150 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
|
5151 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5152 |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5153 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 5154 buf_scan_non_heap_roots.done(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5155 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5156 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
|
5157 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5158 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
|
5159 |
| 342 | 5160 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
|
5161 ((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
|
5162 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5163 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 5164 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5165 // 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
|
5166 // 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
|
5167 // 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
|
5168 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5169 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
|
5170 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
|
5171 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
|
5172 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5173 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
|
5174 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5175 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
|
5176 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5177 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5178 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 5179 |
| 12080 | 5180 // If this is an initial mark pause, and we're not scanning |
| 5181 // the entire code cache, we need to mark the oops in the | |
| 5182 // strong code root lists for the regions that are not in | |
| 5183 // the collection set. | |
| 5184 // Note all threads participate in this set of root tasks. | |
| 5185 double mark_strong_code_roots_ms = 0.0; | |
| 5186 if (g1_policy()->during_initial_mark_pause() && !(so & SO_CodeCache)) { | |
| 5187 double mark_strong_roots_start = os::elapsedTime(); | |
| 5188 mark_strong_code_roots(worker_i); | |
| 5189 mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; | |
| 5190 } | |
| 5191 g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); | |
| 5192 | |
| 342 | 5193 // Now scan the complement of the collection set. |
| 5194 if (scan_rs != NULL) { | |
| 12080 | 5195 g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
| 342 | 5196 } |
| 5197 _process_strong_tasks->all_tasks_completed(); | |
| 5198 } | |
| 5199 | |
| 5200 void | |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5201 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
|
5202 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5203 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
| 342 | 5204 } |
| 5205 | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5206 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5207 private: |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5208 BoolObjectClosure* _is_alive; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5209 int _initial_string_table_size; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5210 int _initial_symbol_table_size; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5211 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5212 bool _process_strings; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5213 int _strings_processed; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5214 int _strings_removed; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5215 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5216 bool _process_symbols; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5217 int _symbols_processed; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5218 int _symbols_removed; |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5219 |
|
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5220 bool _do_in_parallel; |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5221 public: |
|
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|
5222 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
|
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|
5223 AbstractGangTask("Par String/Symbol table unlink"), _is_alive(is_alive), |
|
17652
0eb64cfc0b76
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|
5224 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
|
17634
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|
5225 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
|
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|
5226 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
|
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|
5227 |
|
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changeset
|
5228 _initial_string_table_size = StringTable::the_table()->table_size(); |
|
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|
5229 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
|
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changeset
|
5230 if (process_strings) { |
|
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changeset
|
5231 StringTable::clear_parallel_claimed_index(); |
|
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|
5232 } |
|
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|
5233 if (process_symbols) { |
|
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changeset
|
5234 SymbolTable::clear_parallel_claimed_index(); |
|
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|
5235 } |
|
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|
5236 } |
|
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changeset
|
5237 |
|
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|
5238 ~G1StringSymbolTableUnlinkTask() { |
|
17652
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changeset
|
5239 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
|
17634
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|
5240 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
|
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changeset
|
5241 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
|
17652
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changeset
|
5242 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
|
17634
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|
5243 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
|
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|
5244 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
|
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|
5245 } |
|
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|
5246 |
|
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|
5247 void work(uint worker_id) { |
|
17652
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|
5248 if (_do_in_parallel) { |
|
17634
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|
5249 int strings_processed = 0; |
|
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changeset
|
5250 int strings_removed = 0; |
|
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changeset
|
5251 int symbols_processed = 0; |
|
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changeset
|
5252 int symbols_removed = 0; |
|
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|
5253 if (_process_strings) { |
|
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changeset
|
5254 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
|
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|
5255 Atomic::add(strings_processed, &_strings_processed); |
|
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|
5256 Atomic::add(strings_removed, &_strings_removed); |
|
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|
5257 } |
|
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|
5258 if (_process_symbols) { |
|
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changeset
|
5259 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
|
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|
5260 Atomic::add(symbols_processed, &_symbols_processed); |
|
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|
5261 Atomic::add(symbols_removed, &_symbols_removed); |
|
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|
5262 } |
|
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changeset
|
5263 } else { |
|
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changeset
|
5264 if (_process_strings) { |
|
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changeset
|
5265 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
|
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|
5266 } |
|
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changeset
|
5267 if (_process_symbols) { |
|
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changeset
|
5268 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
|
5a32d2a3cc1e
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changeset
|
5269 } |
|
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changeset
|
5270 } |
|
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diff
changeset
|
5271 } |
|
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changeset
|
5272 |
|
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changeset
|
5273 size_t strings_processed() const { return (size_t)_strings_processed; } |
|
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changeset
|
5274 size_t strings_removed() const { return (size_t)_strings_removed; } |
|
5a32d2a3cc1e
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changeset
|
5275 |
|
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changeset
|
5276 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
|
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|
5277 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
|
5a32d2a3cc1e
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changeset
|
5278 }; |
|
5a32d2a3cc1e
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diff
changeset
|
5279 |
|
5a32d2a3cc1e
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changeset
|
5280 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
|
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|
5281 bool process_strings, bool process_symbols) { |
|
5a32d2a3cc1e
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changeset
|
5282 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
5a32d2a3cc1e
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changeset
|
5283 _g1h->workers()->active_workers() : 1); |
|
5a32d2a3cc1e
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diff
changeset
|
5284 |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5285 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5286 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5287 set_par_threads(n_workers); |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5288 workers()->run_task(&g1_unlink_task); |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
5289 set_par_threads(0); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5290 } else { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
5291 g1_unlink_task.work(0); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5292 } |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5293 if (G1TraceStringSymbolTableScrubbing) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5294 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5295 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5296 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5297 g1_unlink_task.strings_processed(), g1_unlink_task.strings_removed(), |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5298 g1_unlink_task.symbols_processed(), g1_unlink_task.symbols_removed()); |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5299 } |
| 17764 | 5300 |
| 5301 if (G1StringDedup::is_enabled()) { | |
| 5302 G1StringDedup::unlink(is_alive); | |
| 5303 } | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5304 } |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5305 |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5306 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5307 public: |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
5308 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5309 *card_ptr = CardTableModRefBS::dirty_card_val(); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5310 return true; |
|
a07bea31ef35
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tschatzl
parents:
17755
diff
changeset
|
5311 } |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5312 }; |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
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diff
changeset
|
5313 |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5314 void G1CollectedHeap::redirty_logged_cards() { |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5315 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5316 double redirty_logged_cards_start = os::elapsedTime(); |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5317 |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5318 RedirtyLoggedCardTableEntryFastClosure redirty; |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
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17755
diff
changeset
|
5319 dirty_card_queue_set().set_closure(&redirty); |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5320 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5321 |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5322 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5323 dcq.merge_bufferlists(&dirty_card_queue_set()); |
|
a07bea31ef35
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tschatzl
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diff
changeset
|
5324 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5325 |
|
a07bea31ef35
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tschatzl
parents:
17755
diff
changeset
|
5326 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5327 } |
|
a07bea31ef35
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tschatzl
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17755
diff
changeset
|
5328 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5329 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5330 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5331 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5332 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5333 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5334 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5335 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5336 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5337 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5338 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5339 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5340 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5341 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5342 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5343 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5345 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5354 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5355 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5356 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5357 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5358 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5359 void do_oop( oop* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5360 oop obj = *p; |
|
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 if (_g1->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5363 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5364 *p = obj->forwardee(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5365 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5366 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5367 }; |
|
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 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 // serial and parallel code as long as different worker |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5372 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5373 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5374 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5375 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 OopClosure* _copy_non_heap_obj_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5377 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5378 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5379 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5380 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5381 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5382 OopClosure* non_heap_obj_cl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5383 OopsInHeapRegionClosure* metadata_obj_cl, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 G1ParScanThreadState* pss): |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5385 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5386 _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
|
5387 _copy_metadata_obj_cl(metadata_obj_cl), |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5388 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 {} |
|
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 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5394 template <class T> void do_oop_work(T* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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 if (_g1h->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5399 // 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
|
5400 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5402 // heap, update the RSet for the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5403 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5404 // 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
|
5405 // it alive by policy. Therefore we have copy the referent. |
|
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 // 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
|
5408 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5409 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5410 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5411 // 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
|
5412 // use the the non-heap or metadata closures directly to copy |
| 10405 | 5413 // the referent object and update the pointer, while avoiding |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5414 // updating the RSet. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5415 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5416 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5417 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5418 } else { |
|
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17866
diff
changeset
|
5419 assert(!Metaspace::contains((const void*)p), |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5420 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
|
5421 PTR_FORMAT, p)); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5422 _copy_non_heap_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5424 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5425 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5426 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5427 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5428 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5429 // closure for each discovered list in some of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5430 // reference processing phases. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5431 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5432 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5433 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5434 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5435 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5436 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5437 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5438 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5439 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5440 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5442 _par_scan_state(pss) |
|
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 void do_void() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 pss->trim_queue(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5448 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5450 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5451 // Parallel Reference Processing closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5452 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5453 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 // processing during G1 evacuation pauses. |
|
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 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5457 private: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5458 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5459 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5460 FlexibleWorkGang* _workers; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5461 int _active_workers; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5462 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5463 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5464 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5465 FlexibleWorkGang* workers, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5466 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5467 int n_workers) : |
|
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changeset
|
5468 _g1h(g1h), |
|
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diff
changeset
|
5469 _queues(task_queues), |
|
4dfb2df418f2
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diff
changeset
|
5470 _workers(workers), |
|
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diff
changeset
|
5471 _active_workers(n_workers) |
|
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diff
changeset
|
5472 { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5473 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
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parents:
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|
5474 } |
|
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parents:
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diff
changeset
|
5475 |
|
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parents:
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|
5476 // Executes the given task using concurrent marking worker threads. |
|
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diff
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|
5477 virtual void execute(ProcessTask& task); |
|
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parents:
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diff
changeset
|
5478 virtual void execute(EnqueueTask& task); |
|
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parents:
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|
5479 }; |
|
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parents:
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diff
changeset
|
5480 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5481 // Gang task for possibly parallel reference processing |
|
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diff
changeset
|
5482 |
|
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|
5483 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
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|
5484 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
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|
5485 ProcessTask& _proc_task; |
|
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|
5486 G1CollectedHeap* _g1h; |
|
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|
5487 RefToScanQueueSet *_task_queues; |
|
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|
5488 ParallelTaskTerminator* _terminator; |
|
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changeset
|
5489 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5490 public: |
|
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diff
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|
5491 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
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|
5492 G1CollectedHeap* g1h, |
|
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|
5493 RefToScanQueueSet *task_queues, |
|
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|
5494 ParallelTaskTerminator* terminator) : |
|
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|
5495 AbstractGangTask("Process reference objects in parallel"), |
|
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|
5496 _proc_task(proc_task), |
|
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parents:
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diff
changeset
|
5497 _g1h(g1h), |
|
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|
5498 _task_queues(task_queues), |
|
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|
5499 _terminator(terminator) |
|
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parents:
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|
5500 {} |
|
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diff
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|
5501 |
|
4728
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|
5502 virtual void work(uint worker_id) { |
|
3979
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|
5503 // The reference processing task executed by a single worker. |
|
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|
5504 ResourceMark rm; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5505 HandleMark hm; |
|
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parents:
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diff
changeset
|
5506 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5507 G1STWIsAliveClosure is_alive(_g1h); |
|
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parents:
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changeset
|
5508 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5509 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
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parents:
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changeset
|
5510 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5511 |
|
3979
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parents:
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changeset
|
5512 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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parents:
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changeset
|
5513 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5514 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
5515 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
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|
5516 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5517 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
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coleenp
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changeset
|
5518 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
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|
5519 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5520 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
5521 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5522 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5523 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
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parents:
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diff
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|
5524 // We also need to mark copied objects. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5525 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5526 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5527 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5528 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5529 // Keep alive closure. |
|
6725
da91efe96a93
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coleenp
parents:
6629
diff
changeset
|
5530 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5531 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5532 // Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5533 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5534 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5535 // Call the reference processing task's work routine. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5536 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5537 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5538 // Note we cannot assert that the refs array is empty here as not all |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5539 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5540 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5541 // the queue may not be empty. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5542 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5543 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5544 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5545 // Driver routine for parallel reference processing. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5546 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5547 // task and has the worker threads execute it. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5548 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5549 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5550 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5551 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5552 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5553 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5554 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5555 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5556 _g1h->set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5557 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5558 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5559 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5560 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5561 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5562 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
4dfb2df418f2
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diff
changeset
|
5563 EnqueueTask& _enq_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5564 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5565 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5566 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5567 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5568 _enq_task(enq_task) |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5569 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5570 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5571 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
|
5572 _enq_task.work(worker_id); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5573 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5574 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5575 |
| 10405 | 5576 // Driver routine for parallel reference enqueueing. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5577 // Creates an instance of the ref enqueueing gang |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5578 // task and has the worker threads execute it. |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5579 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5580 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5581 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5582 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5583 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5584 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5585 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5586 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5587 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5588 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5589 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5590 // End of weak reference support closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5591 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5592 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
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|
5593 // that are in the collection set and are pointed to by reference |
|
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|
5594 // objects discovered by the CM ref processor. |
|
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diff
changeset
|
5595 |
|
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|
5596 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
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|
5597 protected: |
|
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|
5598 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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diff
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|
5599 RefToScanQueueSet *_queues; |
|
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changeset
|
5600 ParallelTaskTerminator _terminator; |
|
4728
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|
5601 uint _n_workers; |
|
3979
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|
5602 |
|
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changeset
|
5603 public: |
|
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|
5604 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
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|
5605 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5606 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5607 _queues(task_queues), |
|
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|
5608 _terminator(workers, _queues), |
|
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changeset
|
5609 _n_workers(workers) |
|
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|
5610 { } |
|
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|
5611 |
|
4728
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|
5612 void work(uint worker_id) { |
|
3979
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|
5613 ResourceMark rm; |
|
4dfb2df418f2
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diff
changeset
|
5614 HandleMark hm; |
|
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changeset
|
5615 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5616 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
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|
5617 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5618 |
|
3979
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|
5619 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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|
5620 |
|
4dfb2df418f2
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changeset
|
5621 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
|
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|
5622 |
|
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diff
changeset
|
5623 |
|
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|
5624 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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diff
changeset
|
5625 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
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|
5626 |
|
4dfb2df418f2
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changeset
|
5627 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
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coleenp
parents:
6629
diff
changeset
|
5628 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
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|
5629 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5630 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
5631 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
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|
5632 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5633 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5634 // We also need to mark copied objects. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5635 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
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coleenp
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|
5636 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
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parents:
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|
5637 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5638 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5639 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5640 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5641 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5642 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5643 // to be copied. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5644 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5645 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5646 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5647 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5648 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
|
5649 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5650 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5651 // 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
|
5652 // 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
|
5653 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5654 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5655 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5656 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5657 // 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
|
5658 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5659 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5660 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5661 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5662 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5663 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5665 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5666 oop ref = iter.obj(); |
|
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 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5669 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5671 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5672 iter.move_to_next(); |
|
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 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5675 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5676 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5677 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5678 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5679 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5680 assert(pss.refs()->is_empty(), "should be"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5681 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5682 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5683 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5684 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5685 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5686 double ref_proc_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5687 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5688 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5689 assert(rp->discovery_enabled(), "should have been enabled"); |
|
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 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 // 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
|
5693 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5694 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5695 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5696 // 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
|
5697 // 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
|
5698 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5699 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5700 // but would not have treated the reference object as a regular oop. |
| 10405 | 5701 // As a result the copy closure would not have been applied to the |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 // referent object. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 // We also need to do this copying before we process the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 // objects discovered by the STW ref processor in case one of these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5710 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5711 |
| 4711 | 5712 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5713 no_of_gc_workers == workers()->active_workers(), |
| 5714 "Need to reset active GC workers"); | |
| 5715 | |
| 5716 set_par_threads(no_of_gc_workers); | |
| 5717 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5718 no_of_gc_workers, | |
| 5719 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5721 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5727 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5728 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5729 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5730 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5731 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5732 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 // of JNI refs is serial and performed serially by the current thread |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 // 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
|
5735 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5736 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5737 // Use only a single queue for this PSS. |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5738 G1ParScanThreadState pss(this, 0, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5739 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5740 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5741 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5743 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5744 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5745 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5746 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5747 assert(pss.refs()->is_empty(), "pre-condition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5748 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5749 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
|
5750 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5751 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5752 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
|
5753 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5754 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5755 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
|
5756 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5757 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5758 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5759 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5760 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
|
5761 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5762 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5763 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5764 // Keep alive closure. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5765 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
|
5766 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5767 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5768 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5769 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5770 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5771 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5772 |
| 10405 | 5773 ReferenceProcessorStats stats; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5774 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5775 // Serial reference processing... |
| 10405 | 5776 stats = rp->process_discovered_references(&is_alive, |
| 5777 &keep_alive, | |
| 5778 &drain_queue, | |
| 5779 NULL, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5780 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5781 _gc_tracer_stw->gc_id()); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5782 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5783 // Parallel reference processing |
| 6819 | 5784 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5785 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5786 | |
| 5787 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
| 10405 | 5788 stats = rp->process_discovered_references(&is_alive, |
| 5789 &keep_alive, | |
| 5790 &drain_queue, | |
| 5791 &par_task_executor, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5792 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5793 _gc_tracer_stw->gc_id()); |
| 10405 | 5794 } |
| 5795 | |
| 5796 _gc_tracer_stw->report_gc_reference_stats(stats); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5797 // We have completed copying any necessary live referent objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5798 // (that were not copied during the actual pause) so we can |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5799 // retire any active alloc buffers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5800 pss.retire_alloc_buffers(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5801 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
|
5802 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5803 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
|
5804 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
|
5805 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5806 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5807 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5808 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5809 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5810 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5811 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5812 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
|
5813 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5814 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5815 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5816 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5817 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5818 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5819 } else { |
| 10405 | 5820 // Parallel reference enqueueing |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5821 |
| 6819 | 5822 assert(no_of_gc_workers == workers()->active_workers(), |
| 5823 "Need to reset active workers"); | |
| 5824 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5825 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5826 | |
| 5827 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
|
5828 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5829 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5830 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5831 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5832 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5833 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5834 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5835 // 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
|
5836 // Should we do that here also? We could, but it is a serial operation |
| 10405 | 5837 // and could significantly increase the pause time. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5838 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5839 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
|
5840 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
|
5841 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5842 |
| 10405 | 5843 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
|
5844 _expand_heap_after_alloc_failure = true; |
| 10405 | 5845 _evacuation_failed = false; |
| 342 | 5846 |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5847 // 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
|
5848 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
|
5849 |
| 342 | 5850 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
|
5851 |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5852 // Disable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5853 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
|
5854 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
|
5855 hot_card_cache->set_use_cache(false); |
| 889 | 5856 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5857 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5858 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5859 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5860 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5861 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5862 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5863 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5864 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5865 "If not dynamic should be using all the workers"); |
| 4711 | 5866 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5867 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5868 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5869 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5870 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5871 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5872 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5873 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5874 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5875 |
| 5876 init_for_evac_failure(NULL); | |
| 5877 | |
| 5878 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
|
5879 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5880 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
|
5881 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5882 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5883 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5884 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5885 StrongRootsScope srs(this); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5886 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5887 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5888 // 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
|
5889 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5890 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5891 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5892 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5893 "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
|
5894 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5895 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5896 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
|
5897 g1_par_task.work(0); |
|
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 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5900 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5901 // 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
|
5902 // 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
|
5903 // 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
|
5904 // 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
|
5905 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5906 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5907 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5908 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
|
5909 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
|
5910 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5911 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5912 (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
|
5913 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
|
5914 |
| 342 | 5915 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5916 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5917 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5918 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5919 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5920 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5921 // not copied during the pause. |
| 6819 | 5922 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5923 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5924 // Weak root processing. |
| 342 | 5925 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5926 G1STWIsAliveClosure is_alive(this); |
| 342 | 5927 G1KeepAliveClosure keep_alive(this); |
| 5928 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 17764 | 5929 if (G1StringDedup::is_enabled()) { |
| 5930 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
| 5931 } | |
| 342 | 5932 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5933 |
| 10405 | 5934 release_gc_alloc_regions(n_workers, evacuation_info); |
| 342 | 5935 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
|
5936 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5937 // 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
|
5938 // 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
|
5939 // 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
|
5940 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
|
5941 hot_card_cache->set_use_cache(true); |
| 342 | 5942 |
| 12080 | 5943 // Migrate the strong code roots attached to each region in |
| 5944 // the collection set. Ideally we would like to do this | |
| 5945 // after we have finished the scanning/evacuation of the | |
| 5946 // strong code roots for a particular heap region. | |
| 5947 migrate_strong_code_roots(); | |
| 5948 | |
|
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5949 purge_code_root_memory(); |
|
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5950 |
| 12080 | 5951 if (g1_policy()->during_initial_mark_pause()) { |
| 5952 // Reset the claim values set during marking the strong code roots | |
| 5953 reset_heap_region_claim_values(); | |
| 5954 } | |
| 5955 | |
| 342 | 5956 finalize_for_evac_failure(); |
| 5957 | |
| 5958 if (evacuation_failed()) { | |
| 5959 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5960 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5961 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5962 // 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
|
5963 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5964 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 5965 } |
| 5966 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5967 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5968 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5969 // this after the card table is cleaned (and verified) as |
| 10405 | 5970 // the act of enqueueing entries on to the pending list |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5971 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5972 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5973 // RSets. |
| 6819 | 5974 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5975 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5976 if (G1DeferredRSUpdate) { |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5977 redirty_logged_cards(); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5978 } |
| 342 | 5979 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5980 } | |
| 5981 | |
| 2152 | 5982 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5983 FreeRegionList* free_list, | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5984 bool par, |
|
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5985 bool locked) { |
| 2152 | 5986 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
| 5987 assert(!hr->is_empty(), "the region should not be empty"); | |
| 5988 assert(free_list != NULL, "pre-condition"); | |
| 5989 | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5990 // 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
|
5991 // 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
|
5992 // (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
|
5993 if (!hr->is_young()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5994 _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
|
5995 } |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5996 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
|
5997 free_list->add_ordered(hr); |
| 2152 | 5998 } |
| 5999 | |
| 6000 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 6001 FreeRegionList* free_list, | |
| 6002 bool par) { | |
| 6003 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 6004 assert(free_list != NULL, "pre-condition"); | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6005 |
| 2152 | 6006 size_t hr_capacity = hr->capacity(); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6007 // 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
|
6008 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6009 uint last_index = hr->last_hc_index(); |
| 2152 | 6010 hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6011 free_region(hr, free_list, par); |
| 2152 | 6012 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6013 uint i = hr->hrs_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6014 while (i < last_index) { |
| 3766 | 6015 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6016 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 6017 curr_hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6018 free_region(curr_hr, free_list, par); |
| 2152 | 6019 i += 1; |
| 6020 } | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6021 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6022 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6023 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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|
6024 const HeapRegionSetCount& humongous_regions_removed) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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diff
changeset
|
6025 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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changeset
|
6026 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6027 _old_set.bulk_remove(old_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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diff
changeset
|
6028 _humongous_set.bulk_remove(humongous_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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diff
changeset
|
6029 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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17727
diff
changeset
|
6030 |
|
58fc1b1523dc
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17727
diff
changeset
|
6031 } |
|
58fc1b1523dc
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brutisso
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diff
changeset
|
6032 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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changeset
|
6033 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6034 assert(list != NULL, "list can't be null"); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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changeset
|
6035 if (!list->is_empty()) { |
| 2152 | 6036 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
|
6037 _free_list.add_ordered(list); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6038 } |
|
58fc1b1523dc
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brutisso
parents:
17727
diff
changeset
|
6039 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6040 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
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changeset
|
6041 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6042 assert(_summary_bytes_used >= bytes, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6043 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" should be >= bytes: "SIZE_FORMAT, |
|
58fc1b1523dc
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brutisso
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diff
changeset
|
6044 _summary_bytes_used, bytes)); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6045 _summary_bytes_used -= bytes; |
| 342 | 6046 } |
| 6047 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
changeset
|
6048 class G1ParCleanupCTTask : public AbstractGangTask { |
| 12343 | 6049 G1SATBCardTableModRefBS* _ct_bs; |
|
796
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6819065: G1: eliminate high serial card table clearing time
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diff
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|
6050 G1CollectedHeap* _g1h; |
|
940
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|
6051 HeapRegion* volatile _su_head; |
|
796
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6819065: G1: eliminate high serial card table clearing time
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794
diff
changeset
|
6052 public: |
| 12343 | 6053 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
6054 G1CollectedHeap* g1h) : |
|
796
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6819065: G1: eliminate high serial card table clearing time
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|
6055 AbstractGangTask("G1 Par Cleanup CT Task"), |
|
3830
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
6056 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
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6819065: G1: eliminate high serial card table clearing time
apetrusenko
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diff
changeset
|
6057 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6058 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
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|
6059 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
changeset
|
6060 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
changeset
|
6061 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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794
diff
changeset
|
6062 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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diff
changeset
|
6063 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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936
diff
changeset
|
6064 |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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794
diff
changeset
|
6065 void clear_cards(HeapRegion* r) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6066 // 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
|
6067 if (!r->is_survivor()) { |
|
796
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6819065: G1: eliminate high serial card table clearing time
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parents:
794
diff
changeset
|
6068 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
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diff
changeset
|
6069 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6070 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6071 }; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6072 |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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936
diff
changeset
|
6073 #ifndef PRODUCT |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6074 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
|
6075 G1CollectedHeap* _g1h; |
| 12343 | 6076 G1SATBCardTableModRefBS* _ct_bs; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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parents:
936
diff
changeset
|
6077 public: |
| 12343 | 6078 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
|
6079 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6080 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
|
6081 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
|
6082 _g1h->verify_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6083 } else { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6084 _g1h->verify_not_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6085 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6086 return false; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6087 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6088 }; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6089 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6090 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
|
6091 // All of the region should be clean. |
| 12343 | 6092 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
|
6093 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
|
6094 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
|
6095 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6096 |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6097 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
|
6098 // 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
|
6099 // 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
|
6100 // 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
|
6101 // 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
|
6102 // 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
|
6103 // 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
|
6104 // is dirty. |
| 12343 | 6105 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
|
6106 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
|
6107 if (hr->is_young()) { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6108 ct_bs->verify_g1_young_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6109 } else { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6110 ct_bs->verify_dirty_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6111 } |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6112 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6113 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6114 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
| 12343 | 6115 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6116 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
|
6117 verify_dirty_region(hr); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6118 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6119 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6120 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6121 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6122 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6123 } |
|
940
8624da129f0b
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apetrusenko
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diff
changeset
|
6124 #endif |
|
8624da129f0b
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diff
changeset
|
6125 |
| 342 | 6126 void G1CollectedHeap::cleanUpCardTable() { |
| 12343 | 6127 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 6128 double start = os::elapsedTime(); |
| 6129 | |
| 4023 | 6130 { |
| 6131 // Iterate over the dirty cards region list. | |
| 6132 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 6133 | |
| 4711 | 6134 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 6135 set_par_threads(); | |
| 4023 | 6136 workers()->run_task(&cleanup_task); |
| 6137 set_par_threads(0); | |
| 6138 } else { | |
| 6139 while (_dirty_cards_region_list) { | |
| 6140 HeapRegion* r = _dirty_cards_region_list; | |
| 6141 cleanup_task.clear_cards(r); | |
| 6142 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 6143 if (_dirty_cards_region_list == r) { | |
| 6144 // The last region. | |
| 6145 _dirty_cards_region_list = NULL; | |
| 6146 } | |
| 6147 r->set_next_dirty_cards_region(NULL); | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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|
6148 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6149 } |
| 4023 | 6150 #ifndef PRODUCT |
| 6151 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 6152 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 6153 heap_region_iterate(&cleanup_verifier); | |
| 6154 } | |
| 6155 #endif | |
|
940
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936
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|
6156 } |
|
1394
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johnc
parents:
1391
diff
changeset
|
6157 |
| 342 | 6158 double elapsed = os::elapsedTime() - start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6159 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 6160 } |
| 6161 | |
| 10405 | 6162 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
| 2152 | 6163 size_t pre_used = 0; |
| 6164 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 6165 | |
| 342 | 6166 double young_time_ms = 0.0; |
| 6167 double non_young_time_ms = 0.0; | |
| 6168 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6169 // Since the collection set is a superset of the the young list, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6170 // all we need to do to clear the young list is clear its |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6171 // head and length, and unlink any young regions in the code below |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6172 _young_list->clear(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6173 |
| 342 | 6174 G1CollectorPolicy* policy = g1_policy(); |
| 6175 | |
| 6176 double start_sec = os::elapsedTime(); | |
| 6177 bool non_young = true; | |
| 6178 | |
| 6179 HeapRegion* cur = cs_head; | |
| 6180 int age_bound = -1; | |
| 6181 size_t rs_lengths = 0; | |
| 6182 | |
| 6183 while (cur != NULL) { | |
| 2361 | 6184 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 6185 if (non_young) { |
| 6186 if (cur->is_young()) { | |
| 6187 double end_sec = os::elapsedTime(); | |
| 6188 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 6189 non_young_time_ms += elapsed_ms; | |
| 6190 | |
| 6191 start_sec = os::elapsedTime(); | |
| 6192 non_young = false; | |
| 6193 } | |
| 6194 } else { | |
|
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|
6195 if (!cur->is_young()) { |
|
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|
6196 double end_sec = os::elapsedTime(); |
|
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|
6197 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
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|
6198 young_time_ms += elapsed_ms; |
|
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|
6199 |
|
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|
6200 start_sec = os::elapsedTime(); |
|
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|
6201 non_young = true; |
|
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|
6202 } |
| 342 | 6203 } |
| 6204 | |
|
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|
6205 rs_lengths += cur->rem_set()->occupied_locked(); |
| 342 | 6206 |
| 6207 HeapRegion* next = cur->next_in_collection_set(); | |
| 6208 assert(cur->in_collection_set(), "bad CS"); | |
| 6209 cur->set_next_in_collection_set(NULL); | |
| 6210 cur->set_in_collection_set(false); | |
| 6211 | |
| 6212 if (cur->is_young()) { | |
| 6213 int index = cur->young_index_in_cset(); | |
|
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|
6214 assert(index != -1, "invariant"); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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|
6215 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 6216 size_t words_survived = _surviving_young_words[index]; |
| 6217 cur->record_surv_words_in_group(words_survived); | |
|
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|
6218 |
|
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|
6219 // At this point the we have 'popped' cur from the collection set |
|
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|
6220 // (linked via next_in_collection_set()) but it is still in the |
|
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|
6221 // young list (linked via next_young_region()). Clear the |
|
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|
6222 // _next_young_region field. |
|
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|
6223 cur->set_next_young_region(NULL); |
| 342 | 6224 } else { |
| 6225 int index = cur->young_index_in_cset(); | |
|
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|
6226 assert(index == -1, "invariant"); |
| 342 | 6227 } |
| 6228 | |
| 6229 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 6230 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 6231 "invariant" ); | |
| 6232 | |
| 6233 if (!cur->evacuation_failed()) { | |
|
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|
6234 MemRegion used_mr = cur->used_region(); |
|
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|
6235 |
| 342 | 6236 // And the region is empty. |
|
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|
6237 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
|
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|
6238 pre_used += cur->used(); |
|
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|
6239 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
| 342 | 6240 } else { |
| 6241 cur->uninstall_surv_rate_group(); | |
|
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|
6242 if (cur->is_young()) { |
| 342 | 6243 cur->set_young_index_in_cset(-1); |
|
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|
6244 } |
| 342 | 6245 cur->set_not_young(); |
| 6246 cur->set_evacuation_failed(false); | |
| 4072 | 6247 // The region is now considered to be old. |
| 6248 _old_set.add(cur); | |
| 10405 | 6249 evacuation_info.increment_collectionset_used_after(cur->used()); |
| 342 | 6250 } |
| 6251 cur = next; | |
| 6252 } | |
| 6253 | |
| 10405 | 6254 evacuation_info.set_regions_freed(local_free_list.length()); |
| 342 | 6255 policy->record_max_rs_lengths(rs_lengths); |
| 6256 policy->cset_regions_freed(); | |
| 6257 | |
| 6258 double end_sec = os::elapsedTime(); | |
| 6259 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
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|
6260 |
|
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|
6261 if (non_young) { |
| 342 | 6262 non_young_time_ms += elapsed_ms; |
|
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|
6263 } else { |
| 342 | 6264 young_time_ms += elapsed_ms; |
|
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|
6265 } |
| 342 | 6266 |
|
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|
6267 prepend_to_freelist(&local_free_list); |
|
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|
6268 decrement_summary_bytes(pre_used); |
|
6219
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7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
6269 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
|
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diff
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|
6270 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6271 } |
| 6272 | |
|
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|
6273 // This routine is similar to the above but does not record |
|
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|
6274 // any policy statistics or update free lists; we are abandoning |
|
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|
6275 // the current incremental collection set in preparation of a |
|
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|
6276 // full collection. After the full GC we will start to build up |
|
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|
6277 // the incremental collection set again. |
|
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|
6278 // This is only called when we're doing a full collection |
|
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|
6279 // and is immediately followed by the tearing down of the young list. |
|
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|
6280 |
|
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|
6281 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
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|
6282 HeapRegion* cur = cs_head; |
|
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|
6283 |
|
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changeset
|
6284 while (cur != NULL) { |
|
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|
6285 HeapRegion* next = cur->next_in_collection_set(); |
|
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|
6286 assert(cur->in_collection_set(), "bad CS"); |
|
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|
6287 cur->set_next_in_collection_set(NULL); |
|
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|
6288 cur->set_in_collection_set(false); |
|
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|
6289 cur->set_young_index_in_cset(-1); |
|
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|
6290 cur = next; |
|
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|
6291 } |
|
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|
6292 } |
|
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|
6293 |
| 2152 | 6294 void G1CollectedHeap::set_free_regions_coming() { |
| 6295 if (G1ConcRegionFreeingVerbose) { | |
| 6296 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6297 "setting free regions coming"); | |
| 6298 } | |
| 6299 | |
| 6300 assert(!free_regions_coming(), "pre-condition"); | |
| 6301 _free_regions_coming = true; | |
| 342 | 6302 } |
| 6303 | |
| 2152 | 6304 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
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7127706: G1: re-enable survivors during the initial-mark pause
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4836
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changeset
|
6305 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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diff
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|
6306 |
| 2152 | 6307 { |
| 6308 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6309 _free_regions_coming = false; | |
| 6310 SecondaryFreeList_lock->notify_all(); | |
| 6311 } | |
| 6312 | |
| 6313 if (G1ConcRegionFreeingVerbose) { | |
| 6314 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6315 "reset free regions coming"); | |
| 342 | 6316 } |
| 6317 } | |
| 6318 | |
| 2152 | 6319 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6320 // Most of the time we won't have to wait, so let's do a quick test | |
| 6321 // first before we take the lock. | |
| 6322 if (!free_regions_coming()) { | |
| 6323 return; | |
| 6324 } | |
| 6325 | |
| 6326 if (G1ConcRegionFreeingVerbose) { | |
| 6327 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6328 "waiting for free regions"); | |
| 342 | 6329 } |
| 6330 | |
| 6331 { | |
| 2152 | 6332 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6333 while (free_regions_coming()) { | |
| 6334 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6335 } |
| 2152 | 6336 } |
| 6337 | |
| 6338 if (G1ConcRegionFreeingVerbose) { | |
| 6339 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6340 "done waiting for free regions"); | |
| 6341 } | |
| 342 | 6342 } |
| 6343 | |
| 6344 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6345 assert(heap_lock_held_for_gc(), | |
| 6346 "the heap lock should already be held by or for this thread"); | |
| 6347 _young_list->push_region(hr); | |
| 6348 } | |
| 6349 | |
| 6350 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6351 private: | |
| 6352 bool _success; | |
| 6353 public: | |
| 6354 NoYoungRegionsClosure() : _success(true) { } | |
| 6355 bool doHeapRegion(HeapRegion* r) { | |
| 6356 if (r->is_young()) { | |
| 6357 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6358 r->bottom(), r->end()); | |
| 6359 _success = false; | |
| 6360 } | |
| 6361 return false; | |
| 6362 } | |
| 6363 bool success() { return _success; } | |
| 6364 }; | |
| 6365 | |
|
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|
6366 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
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|
6367 bool ret = _young_list->check_list_empty(check_sample); |
|
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|
6368 |
|
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|
6369 if (check_heap) { |
| 342 | 6370 NoYoungRegionsClosure closure; |
| 6371 heap_region_iterate(&closure); | |
| 6372 ret = ret && closure.success(); | |
| 6373 } | |
| 6374 | |
| 6375 return ret; | |
| 6376 } | |
| 6377 | |
| 4072 | 6378 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6379 private: | |
|
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|
6380 HeapRegionSet *_old_set; |
| 2152 | 6381 |
| 342 | 6382 public: |
|
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|
6383 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6384 |
| 342 | 6385 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6386 if (r->is_empty()) { |
| 6387 // We ignore empty regions, we'll empty the free list afterwards | |
| 6388 } else if (r->is_young()) { | |
| 6389 // We ignore young regions, we'll empty the young list afterwards | |
| 6390 } else if (r->isHumongous()) { | |
| 6391 // We ignore humongous regions, we're not tearing down the | |
| 6392 // humongous region set | |
| 342 | 6393 } else { |
| 4072 | 6394 // The rest should be old |
| 6395 _old_set->remove(r); | |
| 342 | 6396 } |
| 6397 return false; | |
| 6398 } | |
| 6399 | |
| 4072 | 6400 ~TearDownRegionSetsClosure() { |
| 6401 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6402 } |
| 342 | 6403 }; |
| 6404 | |
| 4072 | 6405 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6406 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6407 | |
| 6408 if (!free_list_only) { | |
| 6409 TearDownRegionSetsClosure cl(&_old_set); | |
| 6410 heap_region_iterate(&cl); | |
| 6411 | |
| 17764 | 6412 // Note that emptying the _young_list is postponed and instead done as |
| 6413 // the first step when rebuilding the regions sets again. The reason for | |
| 6414 // this is that during a full GC string deduplication needs to know if | |
| 6415 // a collected region was young or old when the full GC was initiated. | |
| 4072 | 6416 } |
| 6417 _free_list.remove_all(); | |
| 6418 } | |
| 6419 | |
| 6420 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6421 private: | |
| 6422 bool _free_list_only; | |
|
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|
6423 HeapRegionSet* _old_set; |
| 4072 | 6424 FreeRegionList* _free_list; |
| 6425 size_t _total_used; | |
| 6426 | |
| 6427 public: | |
| 6428 RebuildRegionSetsClosure(bool free_list_only, | |
|
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|
6429 HeapRegionSet* old_set, FreeRegionList* free_list) : |
| 4072 | 6430 _free_list_only(free_list_only), |
| 6431 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 6432 assert(_free_list->is_empty(), "pre-condition"); | |
| 6433 if (!free_list_only) { | |
| 6434 assert(_old_set->is_empty(), "pre-condition"); | |
| 6435 } | |
| 6436 } | |
| 6437 | |
| 6438 bool doHeapRegion(HeapRegion* r) { | |
| 6439 if (r->continuesHumongous()) { | |
| 6440 return false; | |
| 6441 } | |
| 6442 | |
| 6443 if (r->is_empty()) { | |
| 6444 // Add free regions to the free list | |
| 6445 _free_list->add_as_tail(r); | |
| 6446 } else if (!_free_list_only) { | |
| 6447 assert(!r->is_young(), "we should not come across young regions"); | |
| 6448 | |
| 6449 if (r->isHumongous()) { | |
| 6450 // We ignore humongous regions, we left the humongous set unchanged | |
| 6451 } else { | |
| 6452 // The rest should be old, add them to the old set | |
| 6453 _old_set->add(r); | |
| 6454 } | |
| 6455 _total_used += r->used(); | |
| 6456 } | |
| 6457 | |
| 6458 return false; | |
| 6459 } | |
| 6460 | |
| 6461 size_t total_used() { | |
| 6462 return _total_used; | |
| 6463 } | |
| 6464 }; | |
| 6465 | |
| 6466 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6467 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6468 | |
| 17764 | 6469 if (!free_list_only) { |
| 6470 _young_list->empty_list(); | |
| 6471 } | |
| 6472 | |
| 4072 | 6473 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); |
| 6474 heap_region_iterate(&cl); | |
| 6475 | |
| 6476 if (!free_list_only) { | |
| 6477 _summary_bytes_used = cl.total_used(); | |
| 6478 } | |
| 6479 assert(_summary_bytes_used == recalculate_used(), | |
| 6480 err_msg("inconsistent _summary_bytes_used, " | |
| 6481 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 6482 _summary_bytes_used, recalculate_used())); | |
| 342 | 6483 } |
| 6484 | |
| 6485 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6486 _refine_cte_cl->set_concurrent(concurrent); | |
| 6487 } | |
| 6488 | |
| 6489 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6490 HeapRegion* hr = heap_region_containing(p); | |
| 6491 if (hr == NULL) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
6492 return false; |
| 342 | 6493 } else { |
| 6494 return hr->is_in(p); | |
| 6495 } | |
| 6496 } | |
| 2152 | 6497 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6498 // Methods for the mutator alloc region |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
6499 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6500 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
6501 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6502 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
|
6503 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6504 "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
|
6505 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
|
6506 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6507 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
|
6508 false /* is_old */, |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6509 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6510 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6511 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6512 _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
|
6513 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6514 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6515 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6516 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6517 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6518 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6519 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
|
6520 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6521 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
|
6522 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
|
6523 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6524 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
|
6525 _summary_bytes_used += allocated_bytes; |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6526 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6527 // 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
|
6528 // 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
|
6529 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6530 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6531 } |
|
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 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
|
6534 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6535 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
|
6536 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6537 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6538 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6539 // 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
|
6540 // in the workgroup. |
| 4711 | 6541 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
|
6542 uint n_workers = workers()->active_workers(); |
| 4711 | 6543 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6544 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6545 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6546 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6547 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
|
6548 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6549 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6550 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6551 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6552 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6553 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6554 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6555 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6556 _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
|
6557 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6558 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6559 // 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
|
6560 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6561 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
|
6562 uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6563 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6564 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
|
6565 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6566 if (count < g1_policy()->max_regions(ap)) { |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6567 bool survivor = (ap == GCAllocForSurvived); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6568 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
|
6569 !survivor, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6570 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6571 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6572 // 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
|
6573 // 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
|
6574 // for survivors too. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6575 new_alloc_region->set_saved_mark(); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6576 if (survivor) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6577 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6578 _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
|
6579 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6580 _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
|
6581 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6582 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
|
6583 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
|
6584 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6585 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6586 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
|
6587 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6588 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6589 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6590 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6591 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6592 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
|
6593 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6594 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6595 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
|
6596 alloc_region->note_end_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6597 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6598 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6599 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6600 } else { |
| 6601 _old_set.add(alloc_region); | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6602 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6603 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6604 } |
|
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 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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|
6607 bool force) { |
|
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|
6608 assert(!force, "not supported for GC alloc regions"); |
|
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|
6609 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
|
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|
6610 } |
|
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|
6611 |
|
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|
6612 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
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|
6613 size_t allocated_bytes) { |
|
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|
6614 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
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|
6615 GCAllocForSurvived); |
|
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|
6616 } |
|
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|
6617 |
|
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|
6618 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
|
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|
6619 bool force) { |
|
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|
6620 assert(!force, "not supported for GC alloc regions"); |
|
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|
6621 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
|
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|
6622 } |
|
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|
6623 |
|
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|
6624 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
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|
6625 size_t allocated_bytes) { |
|
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|
6626 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
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|
6627 GCAllocForTenured); |
|
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|
6628 } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6629 // Heap region set verification |
|
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|
6630 |
| 2152 | 6631 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6632 private: | |
|
17736
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|
6633 HeapRegionSet* _old_set; |
|
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6634 HeapRegionSet* _humongous_set; |
|
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6635 FreeRegionList* _free_list; |
| 2152 | 6636 |
| 6637 public: | |
|
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|
6638 HeapRegionSetCount _old_count; |
|
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|
6639 HeapRegionSetCount _humongous_count; |
|
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6640 HeapRegionSetCount _free_count; |
|
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|
6641 |
|
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|
6642 VerifyRegionListsClosure(HeapRegionSet* old_set, |
|
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|
6643 HeapRegionSet* humongous_set, |
| 2152 | 6644 FreeRegionList* free_list) : |
|
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|
6645 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
|
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|
6646 _old_count(), _humongous_count(), _free_count(){ } |
| 2152 | 6647 |
| 6648 bool doHeapRegion(HeapRegion* hr) { | |
| 6649 if (hr->continuesHumongous()) { | |
| 6650 return false; | |
| 6651 } | |
| 6652 | |
| 6653 if (hr->is_young()) { | |
| 6654 // TODO | |
| 6655 } else if (hr->startsHumongous()) { | |
|
17736
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|
6656 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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|
6657 _humongous_count.increment(1u, hr->capacity()); |
| 2152 | 6658 } else if (hr->is_empty()) { |
|
17736
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|
6659 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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|
6660 _free_count.increment(1u, hr->capacity()); |
| 4072 | 6661 } else { |
|
17736
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|
6662 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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|
6663 _old_count.increment(1u, hr->capacity()); |
| 2152 | 6664 } |
| 6665 return false; | |
| 6666 } | |
|
17736
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|
6667 |
|
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|
6668 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
|
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|
6669 guarantee(old_set->length() == _old_count.length(), err_msg("Old set count mismatch. Expected %u, actual %u.", old_set->length(), _old_count.length())); |
|
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|
6670 guarantee(old_set->total_capacity_bytes() == _old_count.capacity(), err_msg("Old set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
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|
6671 old_set->total_capacity_bytes(), _old_count.capacity())); |
|
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|
6672 |
|
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|
6673 guarantee(humongous_set->length() == _humongous_count.length(), err_msg("Hum set count mismatch. Expected %u, actual %u.", humongous_set->length(), _humongous_count.length())); |
|
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|
6674 guarantee(humongous_set->total_capacity_bytes() == _humongous_count.capacity(), err_msg("Hum set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
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|
6675 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
|
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|
6676 |
|
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|
6677 guarantee(free_list->length() == _free_count.length(), err_msg("Free list count mismatch. Expected %u, actual %u.", free_list->length(), _free_count.length())); |
|
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|
6678 guarantee(free_list->total_capacity_bytes() == _free_count.capacity(), err_msg("Free list capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
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|
6679 free_list->total_capacity_bytes(), _free_count.capacity())); |
|
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|
6680 } |
| 2152 | 6681 }; |
| 6682 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
6683 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
| 3766 | 6684 HeapWord* bottom) { |
| 6685 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6686 MemRegion mr(bottom, end); | |
| 6687 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6688 // 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
|
6689 return new HeapRegion(hrs_index, _bot_shared, mr); |
| 3766 | 6690 } |
| 6691 | |
| 2152 | 6692 void G1CollectedHeap::verify_region_sets() { |
| 6693 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6694 | |
| 6695 // First, check the explicit lists. | |
|
17736
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|
6696 _free_list.verify_list(); |
| 2152 | 6697 { |
| 6698 // Given that a concurrent operation might be adding regions to | |
| 6699 // the secondary free list we have to take the lock before | |
| 6700 // verifying it. | |
| 6701 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
17736
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|
6702 _secondary_free_list.verify_list(); |
|
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|
6703 } |
| 2152 | 6704 |
| 6705 // If a concurrent region freeing operation is in progress it will | |
| 6706 // be difficult to correctly attributed any free regions we come | |
| 6707 // across to the correct free list given that they might belong to | |
| 6708 // one of several (free_list, secondary_free_list, any local lists, | |
| 6709 // etc.). So, if that's the case we will skip the rest of the | |
| 6710 // verification operation. Alternatively, waiting for the concurrent | |
| 6711 // operation to complete will have a non-trivial effect on the GC's | |
| 6712 // operation (no concurrent operation will last longer than the | |
| 6713 // interval between two calls to verification) and it might hide | |
| 6714 // any issues that we would like to catch during testing. | |
| 6715 if (free_regions_coming()) { | |
| 6716 return; | |
| 6717 } | |
| 6718 | |
| 2361 | 6719 // Make sure we append the secondary_free_list on the free_list so |
| 6720 // that all free regions we will come across can be safely | |
| 6721 // attributed to the free_list. | |
| 6722 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6723 |
| 6724 // Finally, make sure that the region accounting in the lists is | |
| 6725 // consistent with what we see in the heap. | |
| 6726 | |
| 4072 | 6727 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6728 heap_region_iterate(&cl); |
|
17736
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|
6729 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
| 342 | 6730 } |
| 12080 | 6731 |
| 6732 // Optimized nmethod scanning | |
| 6733 | |
| 6734 class RegisterNMethodOopClosure: public OopClosure { | |
| 6735 G1CollectedHeap* _g1h; | |
| 6736 nmethod* _nm; | |
| 6737 | |
| 6738 template <class T> void do_oop_work(T* p) { | |
| 6739 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6740 if (!oopDesc::is_null(heap_oop)) { | |
| 6741 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6742 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
13062
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changeset
|
6743 assert(!hr->continuesHumongous(), |
|
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|
6744 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
28674af341ac
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changeset
|
6745 " starting at "HR_FORMAT, |
|
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changeset
|
6746 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
| 12080 | 6747 |
| 6748 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
| 6749 // entries but having duplicates is OK since we "mark" nmethods | |
| 6750 // as visited when we scan the strong code root lists during the GC. | |
| 6751 hr->add_strong_code_root(_nm); | |
|
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|
6752 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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changeset
|
6753 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
|
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changeset
|
6754 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6755 } |
| 6756 } | |
| 6757 | |
| 6758 public: | |
| 6759 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6760 _g1h(g1h), _nm(nm) {} | |
| 6761 | |
| 6762 void do_oop(oop* p) { do_oop_work(p); } | |
| 6763 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6764 }; | |
| 6765 | |
| 6766 class UnregisterNMethodOopClosure: public OopClosure { | |
| 6767 G1CollectedHeap* _g1h; | |
| 6768 nmethod* _nm; | |
| 6769 | |
| 6770 template <class T> void do_oop_work(T* p) { | |
| 6771 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6772 if (!oopDesc::is_null(heap_oop)) { | |
| 6773 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6774 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
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changeset
|
6775 assert(!hr->continuesHumongous(), |
|
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changeset
|
6776 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
28674af341ac
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changeset
|
6777 " starting at "HR_FORMAT, |
|
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changeset
|
6778 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
|
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|
6779 |
| 12080 | 6780 hr->remove_strong_code_root(_nm); |
|
13062
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|
6781 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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changeset
|
6782 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
|
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|
6783 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6784 } |
| 6785 } | |
| 6786 | |
| 6787 public: | |
| 6788 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6789 _g1h(g1h), _nm(nm) {} | |
| 6790 | |
| 6791 void do_oop(oop* p) { do_oop_work(p); } | |
| 6792 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6793 }; | |
| 6794 | |
| 6795 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
| 6796 CollectedHeap::register_nmethod(nm); | |
| 6797 | |
| 6798 guarantee(nm != NULL, "sanity"); | |
| 6799 RegisterNMethodOopClosure reg_cl(this, nm); | |
| 6800 nm->oops_do(®_cl); | |
| 6801 } | |
| 6802 | |
| 6803 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
| 6804 CollectedHeap::unregister_nmethod(nm); | |
| 6805 | |
| 6806 guarantee(nm != NULL, "sanity"); | |
| 6807 UnregisterNMethodOopClosure reg_cl(this, nm); | |
| 6808 nm->oops_do(®_cl, true); | |
| 6809 } | |
| 6810 | |
| 6811 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
| 6812 public: | |
| 6813 bool doHeapRegion(HeapRegion *hr) { | |
|
13062
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|
6814 assert(!hr->isHumongous(), |
|
28674af341ac
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13060
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changeset
|
6815 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
|
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6816 HR_FORMAT_PARAMS(hr))); |
| 12080 | 6817 hr->migrate_strong_code_roots(); |
| 6818 return false; | |
| 6819 } | |
| 6820 }; | |
| 6821 | |
| 6822 void G1CollectedHeap::migrate_strong_code_roots() { | |
| 6823 MigrateCodeRootsHeapRegionClosure cl; | |
| 6824 double migrate_start = os::elapsedTime(); | |
| 6825 collection_set_iterate(&cl); | |
| 6826 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
| 6827 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
| 6828 } | |
| 6829 | |
|
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6830 void G1CollectedHeap::purge_code_root_memory() { |
|
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6831 double purge_start = os::elapsedTime(); |
|
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6832 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
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6833 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
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6834 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
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6835 } |
|
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6836 |
| 12080 | 6837 // Mark all the code roots that point into regions *not* in the |
| 6838 // collection set. | |
| 6839 // | |
| 6840 // Note we do not want to use a "marking" CodeBlobToOopClosure while | |
| 6841 // walking the the code roots lists of regions not in the collection | |
| 6842 // set. Suppose we have an nmethod (M) that points to objects in two | |
| 6843 // separate regions - one in the collection set (R1) and one not (R2). | |
| 6844 // Using a "marking" CodeBlobToOopClosure here would result in "marking" | |
| 6845 // nmethod M when walking the code roots for R1. When we come to scan | |
| 6846 // the code roots for R2, we would see that M is already marked and it | |
| 6847 // would be skipped and the objects in R2 that are referenced from M | |
| 6848 // would not be evacuated. | |
| 6849 | |
| 6850 class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { | |
| 6851 | |
| 6852 class MarkStrongCodeRootOopClosure: public OopClosure { | |
| 6853 ConcurrentMark* _cm; | |
| 6854 HeapRegion* _hr; | |
| 6855 uint _worker_id; | |
| 6856 | |
| 6857 template <class T> void do_oop_work(T* p) { | |
| 6858 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6859 if (!oopDesc::is_null(heap_oop)) { | |
| 6860 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6861 // Only mark objects in the region (which is assumed | |
| 6862 // to be not in the collection set). | |
| 6863 if (_hr->is_in(obj)) { | |
| 6864 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); | |
| 6865 } | |
| 6866 } | |
| 6867 } | |
| 6868 | |
| 6869 public: | |
| 6870 MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : | |
| 6871 _cm(cm), _hr(hr), _worker_id(worker_id) { | |
| 6872 assert(!_hr->in_collection_set(), "sanity"); | |
| 6873 } | |
| 6874 | |
| 6875 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6876 void do_oop(oop* p) { do_oop_work(p); } | |
| 6877 }; | |
| 6878 | |
| 6879 MarkStrongCodeRootOopClosure _oop_cl; | |
| 6880 | |
| 6881 public: | |
| 6882 MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): | |
| 6883 _oop_cl(cm, hr, worker_id) {} | |
| 6884 | |
| 6885 void do_code_blob(CodeBlob* cb) { | |
| 6886 nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); | |
| 6887 if (nm != NULL) { | |
| 6888 nm->oops_do(&_oop_cl); | |
| 6889 } | |
| 6890 } | |
| 6891 }; | |
| 6892 | |
| 6893 class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { | |
| 6894 G1CollectedHeap* _g1h; | |
| 6895 uint _worker_id; | |
| 6896 | |
| 6897 public: | |
| 6898 MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : | |
| 6899 _g1h(g1h), _worker_id(worker_id) {} | |
| 6900 | |
| 6901 bool doHeapRegion(HeapRegion *hr) { | |
| 6902 HeapRegionRemSet* hrrs = hr->rem_set(); | |
|
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6903 if (hr->continuesHumongous()) { |
|
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6904 // Code roots should never be attached to a continuation of a humongous region |
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6905 assert(hrrs->strong_code_roots_list_length() == 0, |
|
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6906 err_msg("code roots should never be attached to continuations of humongous region "HR_FORMAT |
|
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6907 " starting at "HR_FORMAT", but has "SIZE_FORMAT, |
|
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6908 HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()), |
|
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6909 hrrs->strong_code_roots_list_length())); |
| 12080 | 6910 return false; |
| 6911 } | |
| 6912 | |
| 6913 if (hr->in_collection_set()) { | |
| 6914 // Don't mark code roots into regions in the collection set here. | |
| 6915 // They will be marked when we scan them. | |
| 6916 return false; | |
| 6917 } | |
| 6918 | |
| 6919 MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); | |
| 6920 hr->strong_code_roots_do(&cb_cl); | |
| 6921 return false; | |
| 6922 } | |
| 6923 }; | |
| 6924 | |
| 6925 void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { | |
| 6926 MarkStrongCodeRootsHRClosure cl(this, worker_id); | |
|
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|
6927 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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6928 heap_region_par_iterate_chunked(&cl, |
|
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6929 worker_id, |
|
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|
6930 workers()->active_workers(), |
|
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|
6931 HeapRegion::ParMarkRootClaimValue); |
|
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|
6932 } else { |
|
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|
6933 heap_region_iterate(&cl); |
|
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|
6934 } |
| 12080 | 6935 } |
| 6936 | |
| 6937 class RebuildStrongCodeRootClosure: public CodeBlobClosure { | |
| 6938 G1CollectedHeap* _g1h; | |
| 6939 | |
| 6940 public: | |
| 6941 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
| 6942 _g1h(g1h) {} | |
| 6943 | |
| 6944 void do_code_blob(CodeBlob* cb) { | |
| 6945 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
| 6946 if (nm == NULL) { | |
| 6947 return; | |
| 6948 } | |
| 6949 | |
|
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fd81a5764900
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diff
changeset
|
6950 if (ScavengeRootsInCode) { |
| 12080 | 6951 _g1h->register_nmethod(nm); |
| 6952 } | |
| 6953 } | |
| 6954 }; | |
| 6955 | |
| 6956 void G1CollectedHeap::rebuild_strong_code_roots() { | |
| 6957 RebuildStrongCodeRootClosure blob_cl(this); | |
| 6958 CodeCache::blobs_do(&blob_cl); | |
| 6959 } |