Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 11096:71180a6e5080
7133260: AllocationProfiler uses space in metadata and doesn't seem to do anything useful.
Summary: Remove -Xaprof and Klass::_alloc_count & ArrayKlass::_alloc_size.
Reviewed-by: stefank, coleenp
| author | jiangli |
|---|---|
| date | Wed, 03 Jul 2013 17:26:59 -0400 |
| parents | f2110083203d |
| children | 6b0fd0964b87 5888334c9c24 |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "code/icBuffer.hpp" | |
| 27 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
| 28 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
| 29 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
| 30 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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31 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
| 1972 | 32 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 33 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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34 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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35 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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36 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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37 #include "gc_implementation/g1/g1Log.hpp" |
| 1972 | 38 #include "gc_implementation/g1/g1MarkSweep.hpp" |
| 39 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
| 40 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
| 10405 | 41 #include "gc_implementation/g1/g1YCTypes.hpp" |
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42 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 43 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
| 44 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 45 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
| 10405 | 46 #include "gc_implementation/shared/gcHeapSummary.hpp" |
| 47 #include "gc_implementation/shared/gcTimer.hpp" | |
| 48 #include "gc_implementation/shared/gcTrace.hpp" | |
| 49 #include "gc_implementation/shared/gcTraceTime.hpp" | |
| 1972 | 50 #include "gc_implementation/shared/isGCActiveMark.hpp" |
| 51 #include "memory/gcLocker.inline.hpp" | |
| 52 #include "memory/genOopClosures.inline.hpp" | |
| 53 #include "memory/generationSpec.hpp" | |
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54 #include "memory/referenceProcessor.hpp" |
| 1972 | 55 #include "oops/oop.inline.hpp" |
| 56 #include "oops/oop.pcgc.inline.hpp" | |
| 57 #include "runtime/vmThread.hpp" | |
| 342 | 58 |
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59 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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60 |
| 342 | 61 // turn it on so that the contents of the young list (scan-only / |
| 62 // to-be-collected) are printed at "strategic" points before / during | |
| 63 // / after the collection --- this is useful for debugging | |
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64 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 65 // CURRENT STATUS |
| 66 // This file is under construction. Search for "FIXME". | |
| 67 | |
| 68 // INVARIANTS/NOTES | |
| 69 // | |
| 70 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 71 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 72 // and allocate_new_tlab, which are the "entry" points to the | |
| 73 // allocation code from the rest of the JVM. (Note that this does not | |
| 74 // apply to TLAB allocation, which is not part of this interface: it | |
| 75 // is done by clients of this interface.) | |
| 342 | 76 |
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77 // Notes on implementation of parallelism in different tasks. |
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78 // |
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79 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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80 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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81 // It does use run_task() which sets _n_workers in the task. |
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82 // G1ParTask executes g1_process_strong_roots() -> |
| 10405 | 83 // SharedHeap::process_strong_roots() which calls eventually to |
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84 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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85 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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86 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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87 // |
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88 |
| 342 | 89 // Local to this file. |
| 90 | |
| 91 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 92 SuspendibleThreadSet* _sts; | |
| 93 G1RemSet* _g1rs; | |
| 94 ConcurrentG1Refine* _cg1r; | |
| 95 bool _concurrent; | |
| 96 public: | |
| 97 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
| 98 G1RemSet* g1rs, | |
| 99 ConcurrentG1Refine* cg1r) : | |
| 100 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
| 101 {} | |
| 102 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
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103 bool oops_into_cset = _g1rs->refine_card(card_ptr, worker_i, false); |
| 1705 | 104 // This path is executed by the concurrent refine or mutator threads, |
| 105 // concurrently, and so we do not care if card_ptr contains references | |
| 106 // that point into the collection set. | |
| 107 assert(!oops_into_cset, "should be"); | |
| 108 | |
| 342 | 109 if (_concurrent && _sts->should_yield()) { |
| 110 // Caller will actually yield. | |
| 111 return false; | |
| 112 } | |
| 113 // Otherwise, we finished successfully; return true. | |
| 114 return true; | |
| 115 } | |
| 116 void set_concurrent(bool b) { _concurrent = b; } | |
| 117 }; | |
| 118 | |
| 119 | |
| 120 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 121 int _calls; | |
| 122 G1CollectedHeap* _g1h; | |
| 123 CardTableModRefBS* _ctbs; | |
| 124 int _histo[256]; | |
| 125 public: | |
| 126 ClearLoggedCardTableEntryClosure() : | |
| 127 _calls(0) | |
| 128 { | |
| 129 _g1h = G1CollectedHeap::heap(); | |
| 130 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
| 131 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 132 } | |
| 133 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 134 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 135 _calls++; | |
| 136 unsigned char* ujb = (unsigned char*)card_ptr; | |
| 137 int ind = (int)(*ujb); | |
| 138 _histo[ind]++; | |
| 139 *card_ptr = -1; | |
| 140 } | |
| 141 return true; | |
| 142 } | |
| 143 int calls() { return _calls; } | |
| 144 void print_histo() { | |
| 145 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 146 for (int i = 0; i < 256; i++) { | |
| 147 if (_histo[i] != 0) { | |
| 148 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 149 } | |
| 150 } | |
| 151 } | |
| 152 }; | |
| 153 | |
| 154 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 155 int _calls; | |
| 156 G1CollectedHeap* _g1h; | |
| 157 CardTableModRefBS* _ctbs; | |
| 158 public: | |
| 159 RedirtyLoggedCardTableEntryClosure() : | |
| 160 _calls(0) | |
| 161 { | |
| 162 _g1h = G1CollectedHeap::heap(); | |
| 163 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
| 164 } | |
| 165 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 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 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
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176 public: |
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177 bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
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178 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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179 return true; |
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180 } |
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181 }; |
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182 |
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183 YoungList::YoungList(G1CollectedHeap* g1h) : |
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184 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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185 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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186 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 187 } |
| 188 | |
| 189 void YoungList::push_region(HeapRegion *hr) { | |
| 190 assert(!hr->is_young(), "should not already be young"); | |
| 191 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 192 | |
| 193 hr->set_next_young_region(_head); | |
| 194 _head = hr; | |
| 195 | |
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196 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 197 ++_length; |
| 198 } | |
| 199 | |
| 200 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 201 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 202 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 203 | |
| 204 hr->set_next_young_region(_survivor_head); | |
| 205 if (_survivor_head == NULL) { | |
| 545 | 206 _survivor_tail = hr; |
| 342 | 207 } |
| 208 _survivor_head = hr; | |
| 209 ++_survivor_length; | |
| 210 } | |
| 211 | |
| 212 void YoungList::empty_list(HeapRegion* list) { | |
| 213 while (list != NULL) { | |
| 214 HeapRegion* next = list->get_next_young_region(); | |
| 215 list->set_next_young_region(NULL); | |
| 216 list->uninstall_surv_rate_group(); | |
| 217 list->set_not_young(); | |
| 218 list = next; | |
| 219 } | |
| 220 } | |
| 221 | |
| 222 void YoungList::empty_list() { | |
| 223 assert(check_list_well_formed(), "young list should be well formed"); | |
| 224 | |
| 225 empty_list(_head); | |
| 226 _head = NULL; | |
| 227 _length = 0; | |
| 228 | |
| 229 empty_list(_survivor_head); | |
| 230 _survivor_head = NULL; | |
| 545 | 231 _survivor_tail = NULL; |
| 342 | 232 _survivor_length = 0; |
| 233 | |
| 234 _last_sampled_rs_lengths = 0; | |
| 235 | |
| 236 assert(check_list_empty(false), "just making sure..."); | |
| 237 } | |
| 238 | |
| 239 bool YoungList::check_list_well_formed() { | |
| 240 bool ret = true; | |
| 241 | |
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242 uint length = 0; |
| 342 | 243 HeapRegion* curr = _head; |
| 244 HeapRegion* last = NULL; | |
| 245 while (curr != NULL) { | |
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246 if (!curr->is_young()) { |
| 342 | 247 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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248 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 249 curr->bottom(), curr->end(), |
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250 curr->is_young(), curr->is_survivor()); |
| 342 | 251 ret = false; |
| 252 } | |
| 253 ++length; | |
| 254 last = curr; | |
| 255 curr = curr->get_next_young_region(); | |
| 256 } | |
| 257 ret = ret && (length == _length); | |
| 258 | |
| 259 if (!ret) { | |
| 260 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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261 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
| 342 | 262 length, _length); |
| 263 } | |
| 264 | |
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265 return ret; |
| 342 | 266 } |
| 267 | |
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268 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 269 bool ret = true; |
| 270 | |
| 271 if (_length != 0) { | |
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272 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
| 342 | 273 _length); |
| 274 ret = false; | |
| 275 } | |
| 276 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 277 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 278 ret = false; | |
| 279 } | |
| 280 if (_head != NULL) { | |
| 281 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 282 ret = false; | |
| 283 } | |
| 284 if (!ret) { | |
| 285 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 286 } | |
| 287 | |
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288 return ret; |
| 342 | 289 } |
| 290 | |
| 291 void | |
| 292 YoungList::rs_length_sampling_init() { | |
| 293 _sampled_rs_lengths = 0; | |
| 294 _curr = _head; | |
| 295 } | |
| 296 | |
| 297 bool | |
| 298 YoungList::rs_length_sampling_more() { | |
| 299 return _curr != NULL; | |
| 300 } | |
| 301 | |
| 302 void | |
| 303 YoungList::rs_length_sampling_next() { | |
| 304 assert( _curr != NULL, "invariant" ); | |
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305 size_t rs_length = _curr->rem_set()->occupied(); |
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306 |
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307 _sampled_rs_lengths += rs_length; |
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308 |
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309 // The current region may not yet have been added to the |
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310 // incremental collection set (it gets added when it is |
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311 // retired as the current allocation region). |
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312 if (_curr->in_collection_set()) { |
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313 // Update the collection set policy information for this region |
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314 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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315 } |
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316 |
| 342 | 317 _curr = _curr->get_next_young_region(); |
| 318 if (_curr == NULL) { | |
| 319 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 320 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 321 } | |
| 322 } | |
| 323 | |
| 324 void | |
| 325 YoungList::reset_auxilary_lists() { | |
| 326 guarantee( is_empty(), "young list should be empty" ); | |
| 327 assert(check_list_well_formed(), "young list should be well formed"); | |
| 328 | |
| 329 // Add survivor regions to SurvRateGroup. | |
| 330 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 331 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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332 |
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333 int young_index_in_cset = 0; |
| 342 | 334 for (HeapRegion* curr = _survivor_head; |
| 335 curr != NULL; | |
| 336 curr = curr->get_next_young_region()) { | |
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337 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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338 |
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339 // The region is a non-empty survivor so let's add it to |
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340 // the incremental collection set for the next evacuation |
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341 // pause. |
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342 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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343 young_index_in_cset += 1; |
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344 } |
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345 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
| 342 | 346 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 347 | |
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348 _head = _survivor_head; |
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349 _length = _survivor_length; |
| 342 | 350 if (_survivor_head != NULL) { |
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351 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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352 assert(_survivor_length > 0, "invariant"); |
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353 _survivor_tail->set_next_young_region(NULL); |
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354 } |
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355 |
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356 // Don't clear the survivor list handles until the start of |
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357 // the next evacuation pause - we need it in order to re-tag |
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358 // the survivor regions from this evacuation pause as 'young' |
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359 // at the start of the next. |
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360 |
| 545 | 361 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 362 |
| 363 assert(check_list_well_formed(), "young list should be well formed"); | |
| 364 } | |
| 365 | |
| 366 void YoungList::print() { | |
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367 HeapRegion* lists[] = {_head, _survivor_head}; |
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368 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 369 |
| 370 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 371 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 372 HeapRegion *curr = lists[list]; | |
| 373 if (curr == NULL) | |
| 374 gclog_or_tty->print_cr(" empty"); | |
| 375 while (curr != NULL) { | |
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376 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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377 HR_FORMAT_PARAMS(curr), |
| 342 | 378 curr->prev_top_at_mark_start(), |
| 379 curr->next_top_at_mark_start(), | |
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380 curr->age_in_surv_rate_group_cond()); |
| 342 | 381 curr = curr->get_next_young_region(); |
| 382 } | |
| 383 } | |
| 384 | |
| 385 gclog_or_tty->print_cr(""); | |
| 386 } | |
| 387 | |
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388 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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389 { |
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390 // Claim the right to put the region on the dirty cards region list |
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391 // by installing a self pointer. |
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392 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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393 if (next == NULL) { |
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394 HeapRegion* res = (HeapRegion*) |
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395 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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396 NULL); |
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397 if (res == NULL) { |
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398 HeapRegion* head; |
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399 do { |
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400 // Put the region to the dirty cards region list. |
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401 head = _dirty_cards_region_list; |
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402 next = (HeapRegion*) |
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403 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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404 if (next == head) { |
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405 assert(hr->get_next_dirty_cards_region() == hr, |
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406 "hr->get_next_dirty_cards_region() != hr"); |
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407 if (next == NULL) { |
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408 // The last region in the list points to itself. |
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409 hr->set_next_dirty_cards_region(hr); |
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410 } else { |
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411 hr->set_next_dirty_cards_region(next); |
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412 } |
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413 } |
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414 } while (next != head); |
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415 } |
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416 } |
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417 } |
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418 |
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419 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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420 { |
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421 HeapRegion* head; |
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422 HeapRegion* hr; |
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423 do { |
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424 head = _dirty_cards_region_list; |
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425 if (head == NULL) { |
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426 return NULL; |
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427 } |
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428 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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429 if (head == new_head) { |
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430 // The last region. |
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431 new_head = NULL; |
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432 } |
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433 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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434 head); |
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435 } while (hr != head); |
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436 assert(hr != NULL, "invariant"); |
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437 hr->set_next_dirty_cards_region(NULL); |
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438 return hr; |
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439 } |
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440 |
| 342 | 441 void G1CollectedHeap::stop_conc_gc_threads() { |
| 794 | 442 _cg1r->stop(); |
| 342 | 443 _cmThread->stop(); |
| 444 } | |
| 445 | |
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446 #ifdef ASSERT |
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447 // A region is added to the collection set as it is retired |
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448 // so an address p can point to a region which will be in the |
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449 // collection set but has not yet been retired. This method |
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450 // therefore is only accurate during a GC pause after all |
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451 // regions have been retired. It is used for debugging |
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452 // to check if an nmethod has references to objects that can |
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453 // be move during a partial collection. Though it can be |
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454 // inaccurate, it is sufficient for G1 because the conservative |
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455 // implementation of is_scavengable() for G1 will indicate that |
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456 // all nmethods must be scanned during a partial collection. |
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457 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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458 HeapRegion* hr = heap_region_containing(p); |
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459 return hr != NULL && hr->in_collection_set(); |
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460 } |
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461 #endif |
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462 |
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463 // Returns true if the reference points to an object that |
| 10405 | 464 // can move in an incremental collection. |
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465 bool G1CollectedHeap::is_scavengable(const void* p) { |
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466 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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467 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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468 HeapRegion* hr = heap_region_containing(p); |
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469 if (hr == NULL) { |
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470 // null |
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471 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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472 return false; |
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473 } else { |
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474 return !hr->isHumongous(); |
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475 } |
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476 } |
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477 |
| 342 | 478 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 479 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 480 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); | |
| 481 | |
| 482 // Count the dirty cards at the start. | |
| 483 CountNonCleanMemRegionClosure count1(this); | |
| 484 ct_bs->mod_card_iterate(&count1); | |
| 485 int orig_count = count1.n(); | |
| 486 | |
| 487 // First clear the logged cards. | |
| 488 ClearLoggedCardTableEntryClosure clear; | |
| 489 dcqs.set_closure(&clear); | |
| 490 dcqs.apply_closure_to_all_completed_buffers(); | |
| 491 dcqs.iterate_closure_all_threads(false); | |
| 492 clear.print_histo(); | |
| 493 | |
| 494 // Now ensure that there's no dirty cards. | |
| 495 CountNonCleanMemRegionClosure count2(this); | |
| 496 ct_bs->mod_card_iterate(&count2); | |
| 497 if (count2.n() != 0) { | |
| 498 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 499 count2.n(), orig_count); | |
| 500 } | |
| 501 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 502 | |
| 503 RedirtyLoggedCardTableEntryClosure redirty; | |
| 504 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
| 505 dcqs.apply_closure_to_all_completed_buffers(); | |
| 506 dcqs.iterate_closure_all_threads(false); | |
| 507 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
| 508 clear.calls(), orig_count); | |
| 509 guarantee(redirty.calls() == clear.calls(), | |
| 510 "Or else mechanism is broken."); | |
| 511 | |
| 512 CountNonCleanMemRegionClosure count3(this); | |
| 513 ct_bs->mod_card_iterate(&count3); | |
| 514 if (count3.n() != orig_count) { | |
| 515 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 516 orig_count, count3.n()); | |
| 517 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 518 } | |
| 519 | |
| 520 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 521 } | |
| 522 | |
| 523 // Private class members. | |
| 524 | |
| 525 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 526 | |
| 527 // Private methods. | |
| 528 | |
| 2152 | 529 HeapRegion* |
| 2361 | 530 G1CollectedHeap::new_region_try_secondary_free_list() { |
| 2152 | 531 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 532 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 533 if (!_secondary_free_list.is_empty()) { | |
| 534 if (G1ConcRegionFreeingVerbose) { | |
| 535 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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536 "secondary_free_list has %u entries", |
| 2152 | 537 _secondary_free_list.length()); |
| 538 } | |
| 539 // It looks as if there are free regions available on the | |
| 540 // secondary_free_list. Let's move them to the free_list and try | |
| 541 // again to allocate from it. | |
| 542 append_secondary_free_list(); | |
| 543 | |
| 544 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
| 545 "empty we should have moved at least one entry to the free_list"); | |
| 546 HeapRegion* res = _free_list.remove_head(); | |
| 547 if (G1ConcRegionFreeingVerbose) { | |
| 548 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 549 "allocated "HR_FORMAT" from secondary_free_list", | |
| 550 HR_FORMAT_PARAMS(res)); | |
| 551 } | |
| 552 return res; | |
| 553 } | |
| 554 | |
| 10405 | 555 // Wait here until we get notified either when (a) there are no |
| 2152 | 556 // more free regions coming or (b) some regions have been moved on |
| 557 // the secondary_free_list. | |
| 558 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 559 } | |
| 560 | |
| 561 if (G1ConcRegionFreeingVerbose) { | |
| 562 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 563 "could not allocate from secondary_free_list"); | |
| 564 } | |
| 565 return NULL; | |
| 566 } | |
| 567 | |
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568 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool do_expand) { |
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569 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 570 "the only time we use this to allocate a humongous region is " |
| 571 "when we are allocating a single humongous region"); | |
| 572 | |
| 573 HeapRegion* res; | |
| 574 if (G1StressConcRegionFreeing) { | |
| 575 if (!_secondary_free_list.is_empty()) { | |
| 576 if (G1ConcRegionFreeingVerbose) { | |
| 577 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 578 "forced to look at the secondary_free_list"); | |
| 579 } | |
| 2361 | 580 res = new_region_try_secondary_free_list(); |
| 2152 | 581 if (res != NULL) { |
| 582 return res; | |
| 583 } | |
| 584 } | |
| 585 } | |
| 586 res = _free_list.remove_head_or_null(); | |
| 587 if (res == NULL) { | |
| 588 if (G1ConcRegionFreeingVerbose) { | |
| 589 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 590 "res == NULL, trying the secondary_free_list"); | |
| 591 } | |
| 2361 | 592 res = new_region_try_secondary_free_list(); |
| 2152 | 593 } |
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594 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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595 // Currently, only attempts to allocate GC alloc regions set |
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596 // do_expand to true. So, we should only reach here during a |
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597 // safepoint. If this assumption changes we might have to |
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598 // reconsider the use of _expand_heap_after_alloc_failure. |
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599 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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600 |
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601 ergo_verbose1(ErgoHeapSizing, |
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602 "attempt heap expansion", |
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603 ergo_format_reason("region allocation request failed") |
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604 ergo_format_byte("allocation request"), |
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605 word_size * HeapWordSize); |
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606 if (expand(word_size * HeapWordSize)) { |
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607 // Given that expand() succeeded in expanding the heap, and we |
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608 // always expand the heap by an amount aligned to the heap |
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609 // region size, the free list should in theory not be empty. So |
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610 // it would probably be OK to use remove_head(). But the extra |
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611 // check for NULL is unlikely to be a performance issue here (we |
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612 // just expanded the heap!) so let's just be conservative and |
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613 // use remove_head_or_null(). |
| 3766 | 614 res = _free_list.remove_head_or_null(); |
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615 } else { |
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616 _expand_heap_after_alloc_failure = false; |
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617 } |
| 342 | 618 } |
| 619 return res; | |
| 620 } | |
| 621 | |
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622 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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623 size_t word_size) { |
| 2361 | 624 assert(isHumongous(word_size), "word_size should be humongous"); |
| 625 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 626 | |
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627 uint first = G1_NULL_HRS_INDEX; |
| 2152 | 628 if (num_regions == 1) { |
| 629 // Only one region to allocate, no need to go through the slower | |
| 10405 | 630 // path. The caller will attempt the expansion if this fails, so |
| 2152 | 631 // let's not try to expand here too. |
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632 HeapRegion* hr = new_region(word_size, false /* do_expand */); |
| 2152 | 633 if (hr != NULL) { |
| 634 first = hr->hrs_index(); | |
| 635 } else { | |
| 3766 | 636 first = G1_NULL_HRS_INDEX; |
| 2152 | 637 } |
| 638 } else { | |
| 639 // We can't allocate humongous regions while cleanupComplete() is | |
| 640 // running, since some of the regions we find to be empty might not | |
| 641 // yet be added to the free list and it is not straightforward to | |
| 642 // know which list they are on so that we can remove them. Note | |
| 643 // that we only need to do this if we need to allocate more than | |
| 644 // one region to satisfy the current humongous allocation | |
| 645 // request. If we are only allocating one region we use the common | |
| 646 // region allocation code (see above). | |
| 647 wait_while_free_regions_coming(); | |
| 2361 | 648 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 649 |
| 650 if (free_regions() >= num_regions) { | |
| 3766 | 651 first = _hrs.find_contiguous(num_regions); |
| 652 if (first != G1_NULL_HRS_INDEX) { | |
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653 for (uint i = first; i < first + num_regions; ++i) { |
| 3766 | 654 HeapRegion* hr = region_at(i); |
| 2152 | 655 assert(hr->is_empty(), "sanity"); |
| 2361 | 656 assert(is_on_master_free_list(hr), "sanity"); |
| 2152 | 657 hr->set_pending_removal(true); |
| 658 } | |
| 659 _free_list.remove_all_pending(num_regions); | |
| 660 } | |
| 661 } | |
| 662 } | |
| 663 return first; | |
| 664 } | |
| 665 | |
| 2361 | 666 HeapWord* |
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667 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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668 uint num_regions, |
| 2361 | 669 size_t word_size) { |
| 3766 | 670 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
| 2361 | 671 assert(isHumongous(word_size), "word_size should be humongous"); |
| 672 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 673 | |
| 674 // Index of last region in the series + 1. | |
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675 uint last = first + num_regions; |
| 2361 | 676 |
| 677 // We need to initialize the region(s) we just discovered. This is | |
| 678 // a bit tricky given that it can happen concurrently with | |
| 679 // refinement threads refining cards on these regions and | |
| 680 // potentially wanting to refine the BOT as they are scanning | |
| 681 // those cards (this can happen shortly after a cleanup; see CR | |
| 682 // 6991377). So we have to set up the region(s) carefully and in | |
| 683 // a specific order. | |
| 684 | |
| 685 // The word size sum of all the regions we will allocate. | |
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686 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 687 assert(word_size <= word_size_sum, "sanity"); |
| 688 | |
| 689 // This will be the "starts humongous" region. | |
| 3766 | 690 HeapRegion* first_hr = region_at(first); |
| 2361 | 691 // The header of the new object will be placed at the bottom of |
| 692 // the first region. | |
| 693 HeapWord* new_obj = first_hr->bottom(); | |
| 694 // This will be the new end of the first region in the series that | |
| 10405 | 695 // should also match the end of the last region in the series. |
| 2361 | 696 HeapWord* new_end = new_obj + word_size_sum; |
| 697 // This will be the new top of the first region that will reflect | |
| 698 // this allocation. | |
| 699 HeapWord* new_top = new_obj + word_size; | |
| 700 | |
| 701 // First, we need to zero the header of the space that we will be | |
| 702 // allocating. When we update top further down, some refinement | |
| 703 // threads might try to scan the region. By zeroing the header we | |
| 704 // ensure that any thread that will try to scan the region will | |
| 705 // come across the zero klass word and bail out. | |
| 706 // | |
| 707 // NOTE: It would not have been correct to have used | |
| 708 // CollectedHeap::fill_with_object() and make the space look like | |
| 709 // an int array. The thread that is doing the allocation will | |
| 710 // later update the object header to a potentially different array | |
| 711 // type and, for a very short period of time, the klass and length | |
| 712 // fields will be inconsistent. This could cause a refinement | |
| 713 // thread to calculate the object size incorrectly. | |
| 714 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 715 | |
| 716 // We will set up the first region as "starts humongous". This | |
| 717 // will also update the BOT covering all the regions to reflect | |
| 718 // that there is a single object that starts at the bottom of the | |
| 719 // first region. | |
| 720 first_hr->set_startsHumongous(new_top, new_end); | |
| 721 | |
| 722 // Then, if there are any, we will set up the "continues | |
| 723 // humongous" regions. | |
| 724 HeapRegion* hr = NULL; | |
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725 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 726 hr = region_at(i); |
| 2361 | 727 hr->set_continuesHumongous(first_hr); |
| 728 } | |
| 729 // If we have "continues humongous" regions (hr != NULL), then the | |
| 730 // end of the last one should match new_end. | |
| 731 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 732 | |
| 733 // Up to this point no concurrent thread would have been able to | |
| 734 // do any scanning on any region in this series. All the top | |
| 735 // fields still point to bottom, so the intersection between | |
| 736 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 737 // update the top fields, we'll do a storestore to make sure that | |
| 738 // no thread sees the update to top before the zeroing of the | |
| 739 // object header and the BOT initialization. | |
| 740 OrderAccess::storestore(); | |
| 741 | |
| 742 // Now that the BOT and the object header have been initialized, | |
| 743 // we can update top of the "starts humongous" region. | |
| 744 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 745 "new_top should be in this region"); | |
| 746 first_hr->set_top(new_top); | |
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747 if (_hr_printer.is_active()) { |
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748 HeapWord* bottom = first_hr->bottom(); |
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749 HeapWord* end = first_hr->orig_end(); |
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750 if ((first + 1) == last) { |
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751 // the series has a single humongous region |
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752 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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753 } else { |
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754 // the series has more than one humongous regions |
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755 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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756 } |
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757 } |
| 2361 | 758 |
| 759 // Now, we will update the top fields of the "continues humongous" | |
| 760 // regions. The reason we need to do this is that, otherwise, | |
| 761 // these regions would look empty and this will confuse parts of | |
| 762 // G1. For example, the code that looks for a consecutive number | |
| 763 // of empty regions will consider them empty and try to | |
| 764 // re-allocate them. We can extend is_empty() to also include | |
| 765 // !continuesHumongous(), but it is easier to just update the top | |
| 766 // fields here. The way we set top for all regions (i.e., top == | |
| 767 // end for all regions but the last one, top == new_top for the | |
| 768 // last one) is actually used when we will free up the humongous | |
| 769 // region in free_humongous_region(). | |
| 770 hr = NULL; | |
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771 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 772 hr = region_at(i); |
| 2361 | 773 if ((i + 1) == last) { |
| 774 // last continues humongous region | |
| 775 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 776 "new_top should fall on this region"); | |
| 777 hr->set_top(new_top); | |
|
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778 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 779 } else { |
| 780 // not last one | |
| 781 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 782 hr->set_top(hr->end()); | |
|
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783 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 784 } |
| 785 } | |
| 786 // If we have continues humongous regions (hr != NULL), then the | |
| 787 // end of the last one should match new_end and its top should | |
| 788 // match new_top. | |
| 789 assert(hr == NULL || | |
| 790 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
| 791 | |
| 792 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 793 _summary_bytes_used += first_hr->used(); | |
| 794 _humongous_set.add(first_hr); | |
| 795 | |
| 796 return new_obj; | |
| 797 } | |
| 798 | |
| 342 | 799 // If could fit into free regions w/o expansion, try. |
| 800 // Otherwise, if can expand, do so. | |
| 801 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 802 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 803 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 804 | |
| 805 verify_region_sets_optional(); | |
| 342 | 806 |
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807 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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808 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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809 uint x_num = expansion_regions(); |
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810 uint fs = _hrs.free_suffix(); |
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811 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
| 3766 | 812 if (first == G1_NULL_HRS_INDEX) { |
| 2152 | 813 // The only thing we can do now is attempt expansion. |
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814 if (fs + x_num >= num_regions) { |
|
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815 // If the number of regions we're trying to allocate for this |
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816 // object is at most the number of regions in the free suffix, |
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817 // then the call to humongous_obj_allocate_find_first() above |
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818 // should have succeeded and we wouldn't be here. |
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819 // |
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820 // We should only be trying to expand when the free suffix is |
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821 // not sufficient for the object _and_ we have some expansion |
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822 // room available. |
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823 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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824 |
|
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825 ergo_verbose1(ErgoHeapSizing, |
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826 "attempt heap expansion", |
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827 ergo_format_reason("humongous allocation request failed") |
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828 ergo_format_byte("allocation request"), |
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829 word_size * HeapWordSize); |
|
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830 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
| 3766 | 831 // Even though the heap was expanded, it might not have |
| 832 // reached the desired size. So, we cannot assume that the | |
| 833 // allocation will succeed. | |
|
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834 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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835 } |
| 2152 | 836 } |
| 837 } | |
| 838 | |
| 2361 | 839 HeapWord* result = NULL; |
| 3766 | 840 if (first != G1_NULL_HRS_INDEX) { |
| 2361 | 841 result = |
| 842 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
| 843 assert(result != NULL, "it should always return a valid result"); | |
|
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844 |
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845 // A successful humongous object allocation changes the used space |
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846 // information of the old generation so we need to recalculate the |
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847 // sizes and update the jstat counters here. |
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848 g1mm()->update_sizes(); |
| 2152 | 849 } |
| 850 | |
| 851 verify_region_sets_optional(); | |
| 2361 | 852 |
| 853 return result; | |
| 342 | 854 } |
| 855 | |
| 1973 | 856 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 857 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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858 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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859 |
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860 unsigned int dummy_gc_count_before; |
|
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861 int dummy_gclocker_retry_count = 0; |
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862 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
| 342 | 863 } |
| 864 | |
| 865 HeapWord* | |
| 866 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 867 bool* gc_overhead_limit_was_exceeded) { |
| 868 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 869 |
| 10405 | 870 // Loop until the allocation is satisfied, or unsatisfied after GC. |
|
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871 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
| 1973 | 872 unsigned int gc_count_before; |
|
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873 |
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874 HeapWord* result = NULL; |
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875 if (!isHumongous(word_size)) { |
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876 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
|
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877 } else { |
|
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878 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
|
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879 } |
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880 if (result != NULL) { |
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881 return result; |
| 342 | 882 } |
| 883 | |
| 884 // Create the garbage collection operation... | |
| 1973 | 885 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 886 // ...and get the VM thread to execute it. |
| 887 VMThread::execute(&op); | |
| 1973 | 888 |
| 889 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 890 // If the operation was successful we'll return the result even | |
| 891 // if it is NULL. If the allocation attempt failed immediately | |
| 892 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 893 HeapWord* result = op.result(); | |
| 894 if (result != NULL && !isHumongous(word_size)) { | |
| 895 // Allocations that take place on VM operations do not do any | |
| 896 // card dirtying and we have to do it here. We only have to do | |
| 897 // this for non-humongous allocations, though. | |
| 898 dirty_young_block(result, word_size); | |
| 899 } | |
| 342 | 900 return result; |
| 1973 | 901 } else { |
|
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902 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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903 return NULL; |
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904 } |
| 1973 | 905 assert(op.result() == NULL, |
| 906 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 907 } |
| 908 | |
| 909 // Give a warning if we seem to be looping forever. | |
| 910 if ((QueuedAllocationWarningCount > 0) && | |
| 911 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 912 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 913 } |
| 914 } | |
| 1973 | 915 |
| 916 ShouldNotReachHere(); | |
|
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917 return NULL; |
| 342 | 918 } |
| 919 | |
|
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920 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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921 unsigned int *gc_count_before_ret, |
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922 int* gclocker_retry_count_ret) { |
|
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923 // Make sure you read the note in attempt_allocation_humongous(). |
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924 |
|
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925 assert_heap_not_locked_and_not_at_safepoint(); |
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926 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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927 "be called for humongous allocation requests"); |
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928 |
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929 // We should only get here after the first-level allocation attempt |
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930 // (attempt_allocation()) failed to allocate. |
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|
931 |
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932 // We will loop until a) we manage to successfully perform the |
|
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933 // allocation or b) we successfully schedule a collection which |
|
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934 // fails to perform the allocation. b) is the only case when we'll |
|
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935 // return NULL. |
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936 HeapWord* result = NULL; |
|
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937 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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938 bool should_try_gc; |
|
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939 unsigned int gc_count_before; |
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940 |
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941 { |
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942 MutexLockerEx x(Heap_lock); |
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943 |
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944 result = _mutator_alloc_region.attempt_allocation_locked(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 // If we reach here, attempt_allocation_locked() above failed to |
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951 // allocate a new region. So the mutator alloc region should be NULL. |
|
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952 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
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|
953 |
|
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954 if (GC_locker::is_active_and_needs_gc()) { |
|
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955 if (g1_policy()->can_expand_young_list()) { |
|
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956 // No need for an ergo verbose message here, |
|
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957 // can_expand_young_list() does this when it returns true. |
|
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958 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
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959 false /* bot_updates */); |
|
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960 if (result != NULL) { |
|
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|
961 return result; |
|
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|
962 } |
|
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963 } |
|
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964 should_try_gc = false; |
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965 } else { |
|
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966 // The GCLocker may not be active but the GCLocker initiated |
|
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967 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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968 // returns true). In this case we do not try this GC and |
|
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969 // wait until the GCLocker initiated GC is performed, and |
|
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970 // then retry the allocation. |
|
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971 if (GC_locker::needs_gc()) { |
|
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972 should_try_gc = false; |
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973 } else { |
|
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974 // Read the GC count while still holding the Heap_lock. |
|
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975 gc_count_before = total_collections(); |
|
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976 should_try_gc = true; |
|
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977 } |
|
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978 } |
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979 } |
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980 |
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981 if (should_try_gc) { |
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982 bool succeeded; |
|
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983 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
|
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984 if (result != NULL) { |
|
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985 assert(succeeded, "only way to get back a non-NULL result"); |
|
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986 return result; |
|
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|
987 } |
|
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|
988 |
|
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989 if (succeeded) { |
|
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990 // If we get here we successfully scheduled a collection which |
|
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991 // failed to allocate. No point in trying to allocate |
|
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992 // further. We'll just return NULL. |
|
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993 MutexLockerEx x(Heap_lock); |
|
4910
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994 *gc_count_before_ret = total_collections(); |
|
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|
995 return NULL; |
|
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|
996 } |
|
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997 } else { |
|
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998 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
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999 MutexLockerEx x(Heap_lock); |
|
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1000 *gc_count_before_ret = total_collections(); |
|
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1001 return NULL; |
|
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1002 } |
|
6106
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1003 // The GCLocker is either active or the GCLocker initiated |
|
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1004 // GC has not yet been performed. Stall until it is and |
|
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1005 // then retry the allocation. |
|
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1006 GC_locker::stall_until_clear(); |
|
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1007 (*gclocker_retry_count_ret) += 1; |
|
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1008 } |
|
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1009 |
| 10405 | 1010 // We can reach here if we were unsuccessful in scheduling a |
|
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1011 // collection (because another thread beat us to it) or if we were |
|
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1012 // stalled due to the GC locker. In either can we should retry the |
|
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1013 // allocation attempt in case another thread successfully |
|
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1014 // performed a collection and reclaimed enough space. We do the |
|
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1015 // first attempt (without holding the Heap_lock) here and the |
|
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|
1016 // follow-on attempt will be at the start of the next loop |
|
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1017 // iteration (after taking the Heap_lock). |
|
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|
1018 result = _mutator_alloc_region.attempt_allocation(word_size, |
|
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|
1019 false /* bot_updates */); |
|
5963
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|
1020 if (result != NULL) { |
|
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|
1021 return result; |
|
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|
1022 } |
|
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|
1023 |
|
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|
1024 // Give a warning if we seem to be looping forever. |
|
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|
1025 if ((QueuedAllocationWarningCount > 0) && |
|
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|
1026 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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|
1027 warning("G1CollectedHeap::attempt_allocation_slow() " |
|
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|
1028 "retries %d times", try_count); |
|
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|
1029 } |
|
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|
1030 } |
|
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|
1031 |
|
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|
1032 ShouldNotReachHere(); |
|
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|
1033 return NULL; |
|
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|
1034 } |
|
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|
1035 |
|
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|
1036 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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|
1037 unsigned int * gc_count_before_ret, |
|
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|
1038 int* gclocker_retry_count_ret) { |
|
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|
1039 // The structure of this method has a lot of similarities to |
|
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|
1040 // attempt_allocation_slow(). The reason these two were not merged |
|
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|
1041 // into a single one is that such a method would require several "if |
|
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1042 // allocation is not humongous do this, otherwise do that" |
|
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|
1043 // conditional paths which would obscure its flow. In fact, an early |
|
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|
1044 // version of this code did use a unified method which was harder to |
|
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|
1045 // follow and, as a result, it had subtle bugs that were hard to |
|
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|
1046 // track down. So keeping these two methods separate allows each to |
|
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|
1047 // be more readable. It will be good to keep these two in sync as |
|
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|
1048 // much as possible. |
|
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|
1049 |
|
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|
1050 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
1051 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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|
1052 "should only be called for humongous allocations"); |
|
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|
1053 |
|
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1054 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
6a78aa6ac1ff
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|
1055 // need to start a marking cycle at each humongous object allocation. We do |
|
6a78aa6ac1ff
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diff
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|
1056 // the check before we do the actual allocation. The reason for doing it |
|
6a78aa6ac1ff
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|
1057 // before the allocation is that we avoid having to keep track of the newly |
|
6a78aa6ac1ff
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|
1058 // allocated memory while we do a GC. |
|
4910
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|
1059 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
caa4652b4414
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|
1060 word_size)) { |
|
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1061 collect(GCCause::_g1_humongous_allocation); |
|
6a78aa6ac1ff
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|
1062 } |
|
6a78aa6ac1ff
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diff
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|
1063 |
|
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|
1064 // We will loop until a) we manage to successfully perform the |
|
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|
1065 // allocation or b) we successfully schedule a collection which |
|
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|
1066 // fails to perform the allocation. b) is the only case when we'll |
|
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|
1067 // return NULL. |
|
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|
1068 HeapWord* result = NULL; |
|
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|
1069 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
1070 bool should_try_gc; |
|
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|
1071 unsigned int gc_count_before; |
|
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|
1072 |
|
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|
1073 { |
|
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|
1074 MutexLockerEx x(Heap_lock); |
|
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|
1075 |
|
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1076 // Given that humongous objects are not allocated in young |
|
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1077 // regions, we'll first try to do the allocation without doing a |
|
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1078 // collection hoping that there's enough space in the heap. |
|
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1079 result = humongous_obj_allocate(word_size); |
|
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1080 if (result != NULL) { |
|
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|
1081 return result; |
|
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|
1082 } |
|
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|
1083 |
|
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|
1084 if (GC_locker::is_active_and_needs_gc()) { |
|
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1085 should_try_gc = false; |
|
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1086 } else { |
|
6106
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1087 // The GCLocker may not be active but the GCLocker initiated |
|
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1088 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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1089 // returns true). In this case we do not try this GC and |
|
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1090 // wait until the GCLocker initiated GC is performed, and |
|
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1091 // then retry the allocation. |
|
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1092 if (GC_locker::needs_gc()) { |
|
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1093 should_try_gc = false; |
|
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1094 } else { |
|
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1095 // Read the GC count while still holding the Heap_lock. |
|
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1096 gc_count_before = total_collections(); |
|
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1097 should_try_gc = true; |
|
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1098 } |
|
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|
1099 } |
|
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1100 } |
|
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|
1101 |
|
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|
1102 if (should_try_gc) { |
|
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1103 // If we failed to allocate the humongous object, we should try to |
|
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1104 // do a collection pause (if we're allowed) in case it reclaims |
|
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1105 // enough space for the allocation to succeed after the pause. |
|
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1106 |
|
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|
1107 bool succeeded; |
|
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1108 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
|
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|
1109 if (result != NULL) { |
|
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|
1110 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
1111 return result; |
|
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1112 } |
|
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1113 |
|
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|
1114 if (succeeded) { |
|
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1115 // If we get here we successfully scheduled a collection which |
|
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1116 // failed to allocate. No point in trying to allocate |
|
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1117 // further. We'll just return NULL. |
|
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|
1118 MutexLockerEx x(Heap_lock); |
|
4910
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|
1119 *gc_count_before_ret = total_collections(); |
|
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|
1120 return NULL; |
|
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|
1121 } |
|
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|
1122 } else { |
|
8853
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1123 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
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|
1124 MutexLockerEx x(Heap_lock); |
|
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1125 *gc_count_before_ret = total_collections(); |
|
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1126 return NULL; |
|
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1127 } |
|
6106
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|
1128 // The GCLocker is either active or the GCLocker initiated |
|
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|
1129 // GC has not yet been performed. Stall until it is and |
|
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1130 // then retry the allocation. |
|
2433
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1131 GC_locker::stall_until_clear(); |
|
8853
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|
1132 (*gclocker_retry_count_ret) += 1; |
|
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1133 } |
|
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|
1134 |
| 10405 | 1135 // We can reach here if we were unsuccessful in scheduling a |
|
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|
1136 // collection (because another thread beat us to it) or if we were |
|
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|
1137 // stalled due to the GC locker. In either can we should retry the |
|
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|
1138 // allocation attempt in case another thread successfully |
|
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|
1139 // performed a collection and reclaimed enough space. Give a |
|
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|
1140 // warning if we seem to be looping forever. |
|
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|
1141 |
|
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|
1142 if ((QueuedAllocationWarningCount > 0) && |
|
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|
1143 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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|
1144 warning("G1CollectedHeap::attempt_allocation_humongous() " |
|
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|
1145 "retries %d times", try_count); |
|
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|
1146 } |
|
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|
1147 } |
|
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|
1148 |
|
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|
1149 ShouldNotReachHere(); |
|
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|
1150 return NULL; |
|
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|
1151 } |
|
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|
1152 |
|
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|
1153 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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|
1154 bool expect_null_mutator_alloc_region) { |
| 2152 | 1155 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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|
1156 assert(_mutator_alloc_region.get() == NULL || |
|
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|
1157 !expect_null_mutator_alloc_region, |
|
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|
1158 "the current alloc region was unexpectedly found to be non-NULL"); |
|
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|
1159 |
|
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|
1160 if (!isHumongous(word_size)) { |
|
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|
1161 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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|
1162 false /* bot_updates */); |
|
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|
1163 } else { |
|
4829
9509c20bba28
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|
1164 HeapWord* result = humongous_obj_allocate(word_size); |
|
9509c20bba28
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|
1165 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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|
1166 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
9509c20bba28
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|
1167 } |
|
9509c20bba28
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|
1168 return result; |
|
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|
1169 } |
|
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|
1170 |
|
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|
1171 ShouldNotReachHere(); |
| 342 | 1172 } |
| 1173 | |
| 1174 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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|
1175 G1CollectedHeap* _g1h; |
| 342 | 1176 ModRefBarrierSet* _mr_bs; |
| 1177 public: | |
|
6254
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|
1178 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
|
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|
1179 _g1h(g1h), _mr_bs(mr_bs) { } |
| 342 | 1180 bool doHeapRegion(HeapRegion* r) { |
|
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|
1181 if (r->continuesHumongous()) { |
| 342 | 1182 return false; |
|
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1183 } |
|
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|
1184 _g1h->reset_gc_time_stamps(r); |
| 342 | 1185 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1186 if (hrrs != NULL) hrrs->clear(); | |
| 1187 // You might think here that we could clear just the cards | |
| 1188 // corresponding to the used region. But no: if we leave a dirty card | |
| 1189 // in a region we might allocate into, then it would prevent that card | |
| 1190 // from being enqueued, and cause it to be missed. | |
| 1191 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1192 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 1193 return false; | |
| 1194 } | |
| 1195 }; | |
| 1196 | |
|
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1197 void G1CollectedHeap::clear_rsets_post_compaction() { |
|
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|
1198 PostMCRemSetClearClosure rs_clear(this, mr_bs()); |
|
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|
1199 heap_region_iterate(&rs_clear); |
|
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|
1200 } |
| 342 | 1201 |
|
626
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|
1202 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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|
1203 G1CollectedHeap* _g1h; |
|
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|
1204 UpdateRSOopClosure _cl; |
|
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|
1205 int _worker_i; |
|
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|
1206 public: |
|
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|
1207 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1208 _cl(g1->g1_rem_set(), worker_i), |
|
626
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|
1209 _worker_i(worker_i), |
|
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|
1210 _g1h(g1) |
|
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|
1211 { } |
|
1960
878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
johnc
parents:
1883
diff
changeset
|
1212 |
|
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1213 bool doHeapRegion(HeapRegion* r) { |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1214 if (!r->continuesHumongous()) { |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1215 _cl.set_from(r); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1216 r->oop_iterate(&_cl); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1217 } |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1218 return false; |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1219 } |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1220 }; |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1221 |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1222 class ParRebuildRSTask: public AbstractGangTask { |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1223 G1CollectedHeap* _g1; |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1224 public: |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
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diff
changeset
|
1225 ParRebuildRSTask(G1CollectedHeap* g1) |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1226 : AbstractGangTask("ParRebuildRSTask"), |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
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parents:
620
diff
changeset
|
1227 _g1(g1) |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
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diff
changeset
|
1228 { } |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1229 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1230 void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1231 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1232 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1233 _g1->workers()->active_workers(), |
|
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1234 HeapRegion::RebuildRSClaimValue); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1235 } |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
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diff
changeset
|
1236 }; |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
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diff
changeset
|
1237 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1238 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1239 private: |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
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changeset
|
1240 G1HRPrinter* _hr_printer; |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1241 public: |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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diff
changeset
|
1242 bool doHeapRegion(HeapRegion* hr) { |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
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diff
changeset
|
1243 assert(!hr->is_young(), "not expecting to find young regions"); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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changeset
|
1244 // We only generate output for non-empty regions. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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changeset
|
1245 if (!hr->is_empty()) { |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
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diff
changeset
|
1246 if (!hr->isHumongous()) { |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
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changeset
|
1247 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
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diff
changeset
|
1248 } else if (hr->startsHumongous()) { |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1249 if (hr->region_num() == 1) { |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
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diff
changeset
|
1250 // single humongous region |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1251 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
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diff
changeset
|
1252 } else { |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
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diff
changeset
|
1253 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1254 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1255 } else { |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1256 assert(hr->continuesHumongous(), "only way to get here"); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1257 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1258 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1259 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1260 return false; |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1261 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1262 |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1263 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1264 : _hr_printer(hr_printer) { } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1265 }; |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1266 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1267 void G1CollectedHeap::print_hrs_post_compaction() { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1268 PostCompactionPrinterClosure cl(hr_printer()); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1269 heap_region_iterate(&cl); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1270 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1271 |
|
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
|
1272 double G1CollectedHeap::verify(bool guard, const char* msg) { |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1273 double verify_time_ms = 0.0; |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1274 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1275 if (guard && total_collections() >= VerifyGCStartAt) { |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1276 double verify_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
|
1277 HandleMark hm; // Discard invalid handles created during verification |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1278 prepare_for_verify(); |
|
10186
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
10183
diff
changeset
|
1279 Universe::verify(VerifyOption_G1UsePrevMarking, msg); |
|
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
|
1280 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1281 } |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1282 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1283 return verify_time_ms; |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1284 } |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1285 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1286 void G1CollectedHeap::verify_before_gc() { |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1287 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1288 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1289 } |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1290 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1291 void G1CollectedHeap::verify_after_gc() { |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1292 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1293 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1294 } |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
1295 |
| 1973 | 1296 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1297 bool clear_all_soft_refs, |
| 342 | 1298 size_t word_size) { |
| 2152 | 1299 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1300 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1301 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1302 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1303 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1304 |
| 10405 | 1305 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
| 1306 gc_timer->register_gc_start(os::elapsed_counter()); | |
| 1307 | |
| 1308 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
| 1309 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
| 1310 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1311 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1312 ResourceMark rm; |
| 1313 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
1314 print_heap_before_gc(); |
| 10405 | 1315 trace_heap_before_gc(gc_tracer); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1316 |
|
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10182
diff
changeset
|
1317 size_t metadata_prev_used = MetaspaceAux::allocated_used_bytes(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1318 |
| 4072 | 1319 HRSPhaseSetter x(HRSPhaseFullGC); |
| 2152 | 1320 verify_region_sets_optional(); |
| 342 | 1321 |
|
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1322 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1323 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1324 |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1325 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1326 |
| 342 | 1327 { |
| 1328 IsGCActiveMark x; | |
| 1329 | |
| 1330 // Timing | |
| 6030 | 1331 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1332 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1333 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1334 |
| 342 | 1335 { |
| 10405 | 1336 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL); |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1337 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1338 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1339 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1340 double start = os::elapsedTime(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1341 g1_policy()->record_full_collection_start(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1342 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
1343 // Note: When we have a more flexible GC logging framework that |
|
71013d764f6e
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1344 // allows us to add optional attributes to a GC log record we |
|
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1345 // could consider timing and reporting how long we wait in the |
|
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|
1346 // following two methods. |
|
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|
1347 wait_while_free_regions_coming(); |
|
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1348 // If we start the compaction before the CM threads finish |
|
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1349 // scanning the root regions we might trip them over as we'll |
|
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1350 // be moving objects / updating references. So let's wait until |
|
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1351 // they are done. By telling them to abort, they should complete |
|
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|
1352 // early. |
|
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|
1353 _cm->root_regions()->abort(); |
|
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|
1354 _cm->root_regions()->wait_until_scan_finished(); |
|
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|
1355 append_secondary_free_list_if_not_empty_with_lock(); |
|
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|
1356 |
|
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|
1357 gc_prologue(true); |
|
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|
1358 increment_total_collections(true /* full gc */); |
|
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|
1359 increment_old_marking_cycles_started(); |
|
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|
1360 |
|
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|
1361 assert(used() == recalculate_used(), "Should be equal"); |
|
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|
1362 |
|
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|
1363 verify_before_gc(); |
|
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|
1364 |
| 10405 | 1365 pre_full_gc_dump(gc_timer); |
|
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1366 |
|
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|
1367 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
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|
1368 |
|
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|
1369 // Disable discovery and empty the discovered lists |
|
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|
1370 // for the CM ref processor. |
|
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|
1371 ref_processor_cm()->disable_discovery(); |
|
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|
1372 ref_processor_cm()->abandon_partial_discovery(); |
|
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|
1373 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1374 |
|
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|
1375 // Abandon current iterations of concurrent marking and concurrent |
|
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1376 // refinement, if any are in progress. We have to do this before |
|
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|
1377 // wait_until_scan_finished() below. |
|
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|
1378 concurrent_mark()->abort(); |
|
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|
1379 |
|
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|
1380 // Make sure we'll choose a new allocation region afterwards. |
|
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|
1381 release_mutator_alloc_region(); |
|
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|
1382 abandon_gc_alloc_regions(); |
|
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|
1383 g1_rem_set()->cleanupHRRS(); |
|
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|
1384 |
|
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|
1385 // We should call this after we retire any currently active alloc |
|
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|
1386 // regions so that all the ALLOC / RETIRE events are generated |
|
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|
1387 // before the start GC event. |
|
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|
1388 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
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|
1389 |
|
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|
1390 // We may have added regions to the current incremental collection |
|
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|
1391 // set between the last GC or pause and now. We need to clear the |
|
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|
1392 // incremental collection set and then start rebuilding it afresh |
|
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|
1393 // after this full GC. |
|
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|
1394 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
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|
1395 g1_policy()->clear_incremental_cset(); |
|
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|
1396 g1_policy()->stop_incremental_cset_building(); |
|
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|
1397 |
|
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|
1398 tear_down_region_sets(false /* free_list_only */); |
|
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|
1399 g1_policy()->set_gcs_are_young(true); |
|
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|
1400 |
|
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|
1401 // See the comments in g1CollectedHeap.hpp and |
|
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|
1402 // G1CollectedHeap::ref_processing_init() about |
|
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|
1403 // how reference processing currently works in G1. |
|
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|
1404 |
|
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|
1405 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
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|
1406 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
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|
1407 |
|
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|
1408 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
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|
1409 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
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|
1410 |
|
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|
1411 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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|
1412 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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|
1413 |
|
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|
1414 // Do collection work |
|
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|
1415 { |
|
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|
1416 HandleMark hm; // Discard invalid handles created during gc |
|
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|
1417 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
|
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|
1418 } |
|
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|
1419 |
|
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changeset
|
1420 assert(free_regions() == 0, "we should not have added any free regions"); |
|
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|
1421 rebuild_region_sets(false /* free_list_only */); |
|
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|
1422 |
|
71013d764f6e
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|
1423 // Enqueue any discovered reference objects that have |
|
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|
1424 // not been removed from the discovered lists. |
|
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|
1425 ref_processor_stw()->enqueue_discovered_references(); |
|
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|
1426 |
|
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|
1427 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
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|
1428 |
|
71013d764f6e
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changeset
|
1429 MemoryService::track_memory_usage(); |
|
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|
1430 |
|
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|
1431 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
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|
1432 ref_processor_stw()->verify_no_references_recorded(); |
|
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|
1433 |
|
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|
1434 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
|
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changeset
|
1435 ClassLoaderDataGraph::purge(); |
|
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
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|
1436 MetaspaceAux::verify_metrics(); |
|
10098
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|
1437 |
|
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|
1438 // Note: since we've just done a full GC, concurrent |
|
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|
1439 // marking is no longer active. Therefore we need not |
|
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|
1440 // re-enable reference discovery for the CM ref processor. |
|
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|
1441 // That will be done at the start of the next marking cycle. |
|
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|
1442 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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|
1443 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1444 |
|
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|
1445 reset_gc_time_stamp(); |
|
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|
1446 // Since everything potentially moved, we will clear all remembered |
| 10405 | 1447 // sets, and clear all cards. Later we will rebuild remembered |
|
10098
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|
1448 // sets. We will also reset the GC time stamps of the regions. |
|
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|
1449 clear_rsets_post_compaction(); |
|
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|
1450 check_gc_time_stamps(); |
|
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changeset
|
1451 |
|
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|
1452 // Resize the heap if necessary. |
|
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|
1453 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
|
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|
1454 |
|
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|
1455 if (_hr_printer.is_active()) { |
|
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changeset
|
1456 // We should do this after we potentially resize the heap so |
|
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|
1457 // that all the COMMIT / UNCOMMIT events are generated before |
|
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|
1458 // the end GC event. |
|
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changeset
|
1459 |
|
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|
1460 print_hrs_post_compaction(); |
|
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|
1461 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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changeset
|
1462 } |
|
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|
1463 |
|
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|
1464 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
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|
1465 if (hot_card_cache->use_cache()) { |
|
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|
1466 hot_card_cache->reset_card_counts(); |
|
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|
1467 hot_card_cache->reset_hot_cache(); |
|
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|
1468 } |
|
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|
1469 |
|
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|
1470 // Rebuild remembered sets of all regions. |
|
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|
1471 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
1472 uint n_workers = |
|
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|
1473 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1474 workers()->active_workers(), |
|
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|
1475 Threads::number_of_non_daemon_threads()); |
|
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|
1476 assert(UseDynamicNumberOfGCThreads || |
|
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|
1477 n_workers == workers()->total_workers(), |
|
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|
1478 "If not dynamic should be using all the workers"); |
|
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|
1479 workers()->set_active_workers(n_workers); |
|
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|
1480 // Set parallel threads in the heap (_n_par_threads) only |
|
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|
1481 // before a parallel phase and always reset it to 0 after |
|
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|
1482 // the phase so that the number of parallel threads does |
|
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|
1483 // no get carried forward to a serial phase where there |
|
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|
1484 // may be code that is "possibly_parallel". |
|
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|
1485 set_par_threads(n_workers); |
|
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|
1486 |
|
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|
1487 ParRebuildRSTask rebuild_rs_task(this); |
|
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|
1488 assert(check_heap_region_claim_values( |
|
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|
1489 HeapRegion::InitialClaimValue), "sanity check"); |
|
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|
1490 assert(UseDynamicNumberOfGCThreads || |
|
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|
1491 workers()->active_workers() == workers()->total_workers(), |
|
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|
1492 "Unless dynamic should use total workers"); |
|
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|
1493 // Use the most recent number of active workers |
|
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|
1494 assert(workers()->active_workers() > 0, |
|
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|
1495 "Active workers not properly set"); |
|
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|
1496 set_par_threads(workers()->active_workers()); |
|
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|
1497 workers()->run_task(&rebuild_rs_task); |
|
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|
1498 set_par_threads(0); |
|
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|
1499 assert(check_heap_region_claim_values( |
|
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|
1500 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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|
1501 reset_heap_region_claim_values(); |
|
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|
1502 } else { |
|
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|
1503 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1504 heap_region_iterate(&rebuild_rs); |
|
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|
1505 } |
|
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|
1506 |
|
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|
1507 if (true) { // FIXME |
|
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|
1508 MetaspaceGC::compute_new_size(); |
|
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|
1509 } |
| 342 | 1510 |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
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diff
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|
1511 #ifdef TRACESPINNING |
|
10098
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|
1512 ParallelTaskTerminator::print_termination_counts(); |
|
546
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diff
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|
1513 #endif |
|
05c6d52fa7a9
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diff
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|
1514 |
|
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|
1515 // Discard all rset updates |
|
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|
1516 JavaThread::dirty_card_queue_set().abandon_logs(); |
|
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|
1517 assert(!G1DeferredRSUpdate |
|
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|
1518 || (G1DeferredRSUpdate && |
|
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diff
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|
1519 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
|
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|
1520 |
|
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|
1521 _young_list->reset_sampled_info(); |
|
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|
1522 // At this point there should be no regions in the |
|
71013d764f6e
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|
1523 // entire heap tagged as young. |
|
71013d764f6e
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changeset
|
1524 assert(check_young_list_empty(true /* check_heap */), |
|
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changeset
|
1525 "young list should be empty at this point"); |
|
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changeset
|
1526 |
|
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|
1527 // Update the number of full collections that have been completed. |
|
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|
1528 increment_old_marking_cycles_completed(false /* concurrent */); |
|
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|
1529 |
|
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|
1530 _hrs.verify_optional(); |
|
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|
1531 verify_region_sets_optional(); |
|
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|
1532 |
|
10373
3a4805ad0005
8015244: G1: Verification after a full GC is incorrectly placed.
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changeset
|
1533 verify_after_gc(); |
|
3a4805ad0005
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diff
changeset
|
1534 |
|
10098
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|
1535 // Start a new incremental collection set for the next pause |
|
71013d764f6e
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changeset
|
1536 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
71013d764f6e
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|
1537 g1_policy()->start_incremental_cset_building(); |
|
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|
1538 |
|
71013d764f6e
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changeset
|
1539 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
71013d764f6e
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|
1540 // regions to the incremental collection set for the next |
|
71013d764f6e
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|
1541 // evacuation pause. |
|
71013d764f6e
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|
1542 clear_cset_fast_test(); |
|
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|
1543 |
|
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changeset
|
1544 init_mutator_alloc_region(); |
|
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|
1545 |
|
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|
1546 double end = os::elapsedTime(); |
|
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|
1547 g1_policy()->record_full_collection_end(); |
|
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|
1548 |
|
71013d764f6e
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|
1549 if (G1Log::fine()) { |
|
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|
1550 g1_policy()->print_heap_transition(); |
|
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|
1551 } |
|
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|
1552 |
|
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|
1553 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
|
71013d764f6e
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|
1554 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
|
71013d764f6e
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|
1555 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
|
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|
1556 // before any GC notifications are raised. |
|
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|
1557 g1mm()->update_sizes(); |
|
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|
1558 |
|
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|
1559 gc_epilogue(true); |
|
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|
1560 } |
|
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|
1561 |
|
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|
1562 if (G1Log::finer()) { |
|
10291
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|
1563 g1_policy()->print_detailed_heap_transition(true /* full */); |
|
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|
1564 } |
|
6121
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|
1565 |
|
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|
1566 print_heap_after_gc(); |
| 10405 | 1567 trace_heap_after_gc(gc_tracer); |
| 1568 | |
| 1569 post_full_gc_dump(gc_timer); | |
| 1570 | |
| 1571 gc_timer->register_gc_end(os::elapsed_counter()); | |
| 1572 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); | |
|
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|
1573 } |
| 1973 | 1574 |
| 1575 return true; | |
| 342 | 1576 } |
| 1577 | |
| 1578 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1579 // do_collection() will return whether it succeeded in performing |
| 1580 // the GC. Currently, there is no facility on the | |
| 1581 // do_full_collection() API to notify the caller than the collection | |
| 1582 // did not succeed (e.g., because it was locked out by the GC | |
| 1583 // locker). So, right now, we'll ignore the return value. | |
| 1584 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1585 clear_all_soft_refs, | |
| 1586 0 /* word_size */); | |
| 342 | 1587 } |
| 1588 | |
| 1589 // This code is mostly copied from TenuredGeneration. | |
| 1590 void | |
| 1591 G1CollectedHeap:: | |
| 1592 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1593 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, "sanity check"); | |
| 1594 | |
| 1595 // Include the current allocation, if any, and bytes that will be | |
| 1596 // pre-allocated to support collections, as "used". | |
| 1597 const size_t used_after_gc = used(); | |
| 1598 const size_t capacity_after_gc = capacity(); | |
| 1599 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1600 | |
|
1717
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|
1601 // This is enforced in arguments.cpp. |
|
688c3755d7af
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|
1602 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
|
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|
1603 "otherwise the code below doesn't make sense"); |
|
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|
1604 |
| 342 | 1605 // We don't have floating point command-line arguments |
|
1717
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|
1606 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1607 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
1717
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1608 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1609 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1610 | |
|
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1611 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1612 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1613 |
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1614 // We have to be careful here as these two calculations can overflow |
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1615 // 32-bit size_t's. |
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1616 double used_after_gc_d = (double) used_after_gc; |
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1617 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1618 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1619 |
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1620 // Let's make sure that they are both under the max heap size, which |
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1621 // by default will make them fit into a size_t. |
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1622 double desired_capacity_upper_bound = (double) max_heap_size; |
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1623 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1624 desired_capacity_upper_bound); |
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1625 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1626 desired_capacity_upper_bound); |
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1627 |
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1628 // We can now safely turn them into size_t's. |
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1629 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1630 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1631 |
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1632 // This assert only makes sense here, before we adjust them |
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1633 // with respect to the min and max heap size. |
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1634 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1635 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1636 "maximum_desired_capacity = "SIZE_FORMAT, |
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1637 minimum_desired_capacity, maximum_desired_capacity)); |
|
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1638 |
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1639 // Should not be greater than the heap max size. No need to adjust |
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1640 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1641 // we'll try to make the capacity larger than it, not smaller). |
|
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1642 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
|
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1643 // Should not be less than the heap min size. No need to adjust it |
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1644 // with respect to the heap max size as it's an upper bound (i.e., |
|
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1645 // we'll try to make the capacity smaller than it, not greater). |
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1646 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1647 |
|
1717
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1648 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1649 // Don't expand unless it's significant |
| 1650 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1651 ergo_verbose4(ErgoHeapSizing, |
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1652 "attempt heap expansion", |
|
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1653 ergo_format_reason("capacity lower than " |
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1654 "min desired capacity after Full GC") |
|
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1655 ergo_format_byte("capacity") |
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1656 ergo_format_byte("occupancy") |
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1657 ergo_format_byte_perc("min desired capacity"), |
|
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1658 capacity_after_gc, used_after_gc, |
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1659 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1660 expand(expand_bytes); |
| 342 | 1661 |
| 1662 // No expansion, now see if we want to shrink | |
|
1717
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|
1663 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1664 // Capacity too large, compute shrinking size |
| 1665 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1666 ergo_verbose4(ErgoHeapSizing, |
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1667 "attempt heap shrinking", |
|
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1668 ergo_format_reason("capacity higher than " |
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|
1669 "max desired capacity after Full GC") |
|
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1670 ergo_format_byte("capacity") |
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|
1671 ergo_format_byte("occupancy") |
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1672 ergo_format_byte_perc("max desired capacity"), |
|
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1673 capacity_after_gc, used_after_gc, |
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|
1674 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1675 shrink(shrink_bytes); |
| 1676 } | |
| 1677 } | |
| 1678 | |
| 1679 | |
| 1680 HeapWord* | |
| 1973 | 1681 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1682 bool* succeeded) { | |
| 2152 | 1683 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1684 |
| 1685 *succeeded = true; | |
| 1686 // Let's attempt the allocation first. | |
|
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1687 HeapWord* result = |
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1688 attempt_allocation_at_safepoint(word_size, |
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|
1689 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1690 if (result != NULL) { |
| 1691 assert(*succeeded, "sanity"); | |
| 1692 return result; | |
| 1693 } | |
| 342 | 1694 |
| 1695 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1696 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1697 // expansion over collection. (This might change in the future if we can | |
| 1698 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1699 result = expand_and_allocate(word_size); | |
| 1700 if (result != NULL) { | |
| 1973 | 1701 assert(*succeeded, "sanity"); |
| 342 | 1702 return result; |
| 1703 } | |
| 1704 | |
| 1973 | 1705 // Expansion didn't work, we'll try to do a Full GC. |
| 1706 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1707 false, /* clear_all_soft_refs */ | |
| 1708 word_size); | |
| 1709 if (!gc_succeeded) { | |
| 1710 *succeeded = false; | |
| 1711 return NULL; | |
| 1712 } | |
| 1713 | |
| 1714 // Retry the allocation | |
| 1715 result = attempt_allocation_at_safepoint(word_size, | |
|
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|
1716 true /* expect_null_mutator_alloc_region */); |
| 342 | 1717 if (result != NULL) { |
| 1973 | 1718 assert(*succeeded, "sanity"); |
| 342 | 1719 return result; |
| 1720 } | |
| 1721 | |
| 1973 | 1722 // Then, try a Full GC that will collect all soft references. |
| 1723 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1724 true, /* clear_all_soft_refs */ | |
| 1725 word_size); | |
| 1726 if (!gc_succeeded) { | |
| 1727 *succeeded = false; | |
| 1728 return NULL; | |
| 1729 } | |
| 1730 | |
| 1731 // Retry the allocation once more | |
| 1732 result = attempt_allocation_at_safepoint(word_size, | |
|
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|
1733 true /* expect_null_mutator_alloc_region */); |
| 342 | 1734 if (result != NULL) { |
| 1973 | 1735 assert(*succeeded, "sanity"); |
| 342 | 1736 return result; |
| 1737 } | |
| 1738 | |
|
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1739 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1740 "Flag should have been handled and cleared prior to this point"); |
|
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1741 |
| 342 | 1742 // What else? We might try synchronous finalization later. If the total |
| 1743 // space available is large enough for the allocation, then a more | |
| 1744 // complete compaction phase than we've tried so far might be | |
| 1745 // appropriate. | |
| 1973 | 1746 assert(*succeeded, "sanity"); |
| 342 | 1747 return NULL; |
| 1748 } | |
| 1749 | |
| 1750 // Attempting to expand the heap sufficiently | |
| 1751 // to support an allocation of the given "word_size". If | |
| 1752 // successful, perform the allocation and return the address of the | |
| 1753 // allocated block, or else "NULL". | |
| 1754 | |
| 1755 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1756 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1757 | |
| 1758 verify_region_sets_optional(); | |
| 1973 | 1759 |
|
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1760 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1761 ergo_verbose1(ErgoHeapSizing, |
|
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1762 "attempt heap expansion", |
|
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1763 ergo_format_reason("allocation request failed") |
|
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1764 ergo_format_byte("allocation request"), |
|
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1765 word_size * HeapWordSize); |
|
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1766 if (expand(expand_bytes)) { |
| 3766 | 1767 _hrs.verify_optional(); |
|
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1768 verify_region_sets_optional(); |
|
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1769 return attempt_allocation_at_safepoint(word_size, |
|
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1770 false /* expect_null_mutator_alloc_region */); |
|
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1771 } |
|
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1772 return NULL; |
| 342 | 1773 } |
| 1774 | |
| 3766 | 1775 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
| 1776 HeapWord* new_end) { | |
| 1777 assert(old_end != new_end, "don't call this otherwise"); | |
| 1778 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
| 1779 | |
| 1780 // Update the committed mem region. | |
| 1781 _g1_committed.set_end(new_end); | |
| 1782 // Tell the card table about the update. | |
| 1783 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
| 1784 // Tell the BOT about the update. | |
| 1785 _bot_shared->resize(_g1_committed.word_size()); | |
|
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1786 // Tell the hot card cache about the update |
|
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1787 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
| 3766 | 1788 } |
| 1789 | |
|
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1790 bool G1CollectedHeap::expand(size_t expand_bytes) { |
| 342 | 1791 size_t old_mem_size = _g1_storage.committed_size(); |
|
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|
1792 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1793 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1794 HeapRegion::GrainBytes); | |
|
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1795 ergo_verbose2(ErgoHeapSizing, |
|
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1796 "expand the heap", |
|
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|
1797 ergo_format_byte("requested expansion amount") |
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1798 ergo_format_byte("attempted expansion amount"), |
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1799 expand_bytes, aligned_expand_bytes); |
|
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1800 |
| 3766 | 1801 // First commit the memory. |
| 1802 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
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1803 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1804 if (successful) { |
| 3766 | 1805 // Then propagate this update to the necessary data structures. |
| 1806 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
| 1807 update_committed_space(old_end, new_end); | |
| 1808 | |
| 1809 FreeRegionList expansion_list("Local Expansion List"); | |
| 1810 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
| 1811 assert(mr.start() == old_end, "post-condition"); | |
| 1812 // mr might be a smaller region than what was requested if | |
| 1813 // expand_by() was unable to allocate the HeapRegion instances | |
| 1814 assert(mr.end() <= new_end, "post-condition"); | |
| 1815 | |
| 1816 size_t actual_expand_bytes = mr.byte_size(); | |
| 1817 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
| 1818 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
| 1819 "post-condition"); | |
| 1820 if (actual_expand_bytes < aligned_expand_bytes) { | |
| 1821 // We could not expand _hrs to the desired size. In this case we | |
| 1822 // need to shrink the committed space accordingly. | |
| 1823 assert(mr.end() < new_end, "invariant"); | |
| 1824 | |
| 1825 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
| 1826 // First uncommit the memory. | |
| 1827 _g1_storage.shrink_by(diff_bytes); | |
| 1828 // Then propagate this update to the necessary data structures. | |
| 1829 update_committed_space(new_end, mr.end()); | |
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1830 } |
| 3766 | 1831 _free_list.add_as_tail(&expansion_list); |
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1832 |
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1833 if (_hr_printer.is_active()) { |
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1834 HeapWord* curr = mr.start(); |
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1835 while (curr < mr.end()) { |
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1836 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1837 _hr_printer.commit(curr, curr_end); |
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1838 curr = curr_end; |
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1839 } |
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1840 assert(curr == mr.end(), "post-condition"); |
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1841 } |
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1842 g1_policy()->record_new_heap_size(n_regions()); |
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1843 } else { |
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1844 ergo_verbose0(ErgoHeapSizing, |
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1845 "did not expand the heap", |
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1846 ergo_format_reason("heap expansion operation failed")); |
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1847 // The expansion of the virtual storage space was unsuccessful. |
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1848 // Let's see if it was because we ran out of swap. |
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1849 if (G1ExitOnExpansionFailure && |
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1850 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1851 // We had head room... |
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1852 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
| 342 | 1853 } |
| 1854 } | |
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1855 return successful; |
| 342 | 1856 } |
| 1857 | |
| 3766 | 1858 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1859 size_t old_mem_size = _g1_storage.committed_size(); |
| 1860 size_t aligned_shrink_bytes = | |
| 1861 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1862 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1863 HeapRegion::GrainBytes); | |
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1864 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1865 |
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1866 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
| 3766 | 1867 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
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1868 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1869 |
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1870 ergo_verbose3(ErgoHeapSizing, |
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1871 "shrink the heap", |
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1872 ergo_format_byte("requested shrinking amount") |
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1873 ergo_format_byte("aligned shrinking amount") |
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1874 ergo_format_byte("attempted shrinking amount"), |
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1875 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1876 if (num_regions_removed > 0) { |
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1877 _g1_storage.shrink_by(shrunk_bytes); |
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1878 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1879 |
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1880 if (_hr_printer.is_active()) { |
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1881 HeapWord* curr = old_end; |
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1882 while (curr > new_end) { |
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1883 HeapWord* curr_end = curr; |
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1884 curr -= HeapRegion::GrainWords; |
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1885 _hr_printer.uncommit(curr, curr_end); |
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1886 } |
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1887 } |
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1888 |
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1889 _expansion_regions += num_regions_removed; |
| 3766 | 1890 update_committed_space(old_end, new_end); |
| 1891 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1892 g1_policy()->record_new_heap_size(n_regions()); |
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1893 } else { |
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1894 ergo_verbose0(ErgoHeapSizing, |
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1895 "did not shrink the heap", |
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1896 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1897 } |
| 1898 } | |
| 1899 | |
| 1900 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1901 verify_region_sets_optional(); |
| 1902 | |
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1903 // We should only reach here at the end of a Full GC which means we |
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1904 // should not not be holding to any GC alloc regions. The method |
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1905 // below will make sure of that and do any remaining clean up. |
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1906 abandon_gc_alloc_regions(); |
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1907 |
| 2152 | 1908 // Instead of tearing down / rebuilding the free lists here, we |
| 1909 // could instead use the remove_all_pending() method on free_list to | |
| 1910 // remove only the ones that we need to remove. | |
| 4072 | 1911 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1912 shrink_helper(shrink_bytes); |
| 4072 | 1913 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1914 |
| 3766 | 1915 _hrs.verify_optional(); |
| 2152 | 1916 verify_region_sets_optional(); |
| 342 | 1917 } |
| 1918 | |
| 1919 // Public methods. | |
| 1920 | |
| 1921 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1922 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1923 #endif // _MSC_VER | |
| 1924 | |
| 1925 | |
| 1926 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1927 SharedHeap(policy_), | |
| 1928 _g1_policy(policy_), | |
| 1111 | 1929 _dirty_card_queue_set(false), |
| 1705 | 1930 _into_cset_dirty_card_queue_set(false), |
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1931 _is_alive_closure_cm(this), |
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1932 _is_alive_closure_stw(this), |
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1933 _ref_processor_cm(NULL), |
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1934 _ref_processor_stw(NULL), |
| 342 | 1935 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1936 _bot_shared(NULL), | |
| 10405 | 1937 _evac_failure_scan_stack(NULL), |
| 342 | 1938 _mark_in_progress(false), |
| 2152 | 1939 _cg1r(NULL), _summary_bytes_used(0), |
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1940 _g1mm(NULL), |
| 342 | 1941 _refine_cte_cl(NULL), |
| 1942 _full_collection(false), | |
| 2152 | 1943 _free_list("Master Free List"), |
| 1944 _secondary_free_list("Secondary Free List"), | |
| 4072 | 1945 _old_set("Old Set"), |
| 2152 | 1946 _humongous_set("Master Humongous Set"), |
| 1947 _free_regions_coming(false), | |
| 342 | 1948 _young_list(new YoungList(this)), |
| 1949 _gc_time_stamp(0), | |
|
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1950 _retained_old_gc_alloc_region(NULL), |
| 6595 | 1951 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1952 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1953 _expand_heap_after_alloc_failure(true), |
| 526 | 1954 _surviving_young_words(NULL), |
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1955 _old_marking_cycles_started(0), |
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1956 _old_marking_cycles_completed(0), |
| 10405 | 1957 _concurrent_cycle_started(false), |
| 526 | 1958 _in_cset_fast_test(NULL), |
|
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1959 _in_cset_fast_test_base(NULL), |
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1960 _dirty_cards_region_list(NULL), |
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1961 _worker_cset_start_region(NULL), |
| 10405 | 1962 _worker_cset_start_region_time_stamp(NULL), |
| 1963 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
| 1964 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
| 1965 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
| 1966 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
| 1967 | |
| 1968 _g1h = this; | |
| 342 | 1969 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
| 1970 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1971 } | |
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1972 |
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1973 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1974 |
| 342 | 1975 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1976 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1977 | |
| 1978 int n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); | |
| 1979 assert(n_rem_sets > 0, "Invariant."); | |
| 1980 | |
| 6197 | 1981 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1982 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
| 10405 | 1983 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
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1984 |
| 342 | 1985 for (int i = 0; i < n_queues; i++) { |
| 1986 RefToScanQueue* q = new RefToScanQueue(); | |
| 1987 q->initialize(); | |
| 1988 _task_queues->register_queue(i, q); | |
| 10405 | 1989 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
| 1990 } | |
|
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1991 clear_cset_start_regions(); |
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1992 |
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1993 // Initialize the G1EvacuationFailureALot counters and flags. |
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1994 NOT_PRODUCT(reset_evacuation_should_fail();) |
|
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1995 |
| 342 | 1996 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1997 } | |
| 1998 | |
| 1999 jint G1CollectedHeap::initialize() { | |
| 1166 | 2000 CollectedHeap::pre_initialize(); |
| 342 | 2001 os::enable_vtime(); |
| 2002 | |
|
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2003 G1Log::init(); |
|
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|
2004 |
| 342 | 2005 // Necessary to satisfy locking discipline assertions. |
| 2006 | |
| 2007 MutexLocker x(Heap_lock); | |
| 2008 | |
|
3778
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2009 // We have to initialize the printer before committing the heap, as |
|
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|
2010 // it will be used then. |
|
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|
2011 _hr_printer.set_active(G1PrintHeapRegions); |
|
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|
2012 |
| 342 | 2013 // While there are no constraints in the GC code that HeapWordSize |
| 2014 // be any particular value, there are multiple other areas in the | |
| 2015 // system which believe this to be true (e.g. oop->object_size in some | |
| 2016 // cases incorrectly returns the size in wordSize units rather than | |
| 2017 // HeapWordSize). | |
| 2018 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 2019 | |
| 2020 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 2021 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
| 2022 | |
| 2023 // Ensure that the sizes are properly aligned. | |
| 2024 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 2025 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 2026 | |
|
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|
2027 _cg1r = new ConcurrentG1Refine(this); |
| 342 | 2028 |
| 2029 // Reserve the maximum. | |
|
642
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|
2030 |
|
3824
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|
2031 // When compressed oops are enabled, the preferred heap base |
|
6aa4feb8a366
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|
2032 // is calculated by subtracting the requested size from the |
|
6aa4feb8a366
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|
2033 // 32Gb boundary and using the result as the base address for |
|
6aa4feb8a366
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|
2034 // heap reservation. If the requested size is not aligned to |
|
6aa4feb8a366
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|
2035 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
|
6aa4feb8a366
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|
2036 // into the ReservedHeapSpace constructor) then the actual |
|
6aa4feb8a366
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|
2037 // base of the reserved heap may end up differing from the |
|
6aa4feb8a366
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|
2038 // address that was requested (i.e. the preferred heap base). |
|
6aa4feb8a366
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|
2039 // If this happens then we could end up using a non-optimal |
|
6aa4feb8a366
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|
2040 // compressed oops mode. |
|
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|
2041 |
|
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|
2042 // Since max_byte_size is aligned to the size of a heap region (checked |
|
6725
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|
2043 // above). |
|
da91efe96a93
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|
2044 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); |
|
da91efe96a93
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|
2045 |
|
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|
2046 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
|
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|
2047 HeapRegion::GrainBytes); |
| 342 | 2048 |
| 2049 // It is important to do this in a way such that concurrent readers can't | |
| 10405 | 2050 // temporarily think something is in the heap. (I've actually seen this |
| 342 | 2051 // happen in asserts: DLD.) |
| 2052 _reserved.set_word_size(0); | |
| 2053 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 2054 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 2055 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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|
2056 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
| 342 | 2057 |
| 2058 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 2059 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 2060 set_barrier_set(rem_set()->bs()); | |
| 2061 if (barrier_set()->is_a(BarrierSet::ModRef)) { | |
| 2062 _mr_bs = (ModRefBarrierSet*)_barrier_set; | |
| 2063 } else { | |
| 2064 vm_exit_during_initialization("G1 requires a mod ref bs."); | |
| 2065 return JNI_ENOMEM; | |
| 2066 } | |
| 2067 | |
| 2068 // Also create a G1 rem set. | |
| 1861 | 2069 if (mr_bs()->is_a(BarrierSet::CardTableModRef)) { |
| 2070 _g1_rem_set = new G1RemSet(this, (CardTableModRefBS*)mr_bs()); | |
| 342 | 2071 } else { |
| 1861 | 2072 vm_exit_during_initialization("G1 requires a cardtable mod ref bs."); |
| 2073 return JNI_ENOMEM; | |
| 342 | 2074 } |
| 2075 | |
| 2076 // Carve out the G1 part of the heap. | |
| 2077 | |
| 2078 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
| 2079 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
| 2080 g1_rs.size()/HeapWordSize); | |
| 2081 | |
| 2082 _g1_storage.initialize(g1_rs, 0); | |
| 2083 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
| 3766 | 2084 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
| 2085 (HeapWord*) _g1_reserved.end(), | |
| 2086 _expansion_regions); | |
| 342 | 2087 |
|
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|
2088 // Do later initialization work for concurrent refinement. |
|
194f52aa2f23
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|
2089 _cg1r->init(); |
|
194f52aa2f23
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|
2090 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
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796
diff
changeset
|
2091 // 6843694 - ensure that the maximum region index can fit |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
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796
diff
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|
2092 // in the remembered set structures. |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
2093 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
|
2094 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2095 |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2096 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
|
2097 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
|
2098 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2099 "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
|
2100 |
| 2152 | 2101 HeapRegionSet::set_unrealistically_long_length(max_regions() + 1); |
| 2102 | |
| 342 | 2103 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
| 2104 heap_word_size(init_byte_size)); | |
| 2105 | |
| 2106 _g1h = this; | |
| 2107 | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
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10242
diff
changeset
|
2108 _in_cset_fast_test_length = max_regions(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
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10242
diff
changeset
|
2109 _in_cset_fast_test_base = |
| 6197 | 2110 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
|
2111 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2112 // 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
|
2113 // 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
|
2114 // 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
|
2115 _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
|
2116 ((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
|
2117 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
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10242
diff
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|
2118 // 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
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10242
diff
changeset
|
2119 // regions to the incremental collection set for the first |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
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10242
diff
changeset
|
2120 // evacuation pause. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
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10242
diff
changeset
|
2121 clear_cset_fast_test(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
2122 |
| 342 | 2123 // Create the ConcurrentMark data structure and thread. |
| 2124 // (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
|
2125 _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
|
2126 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
|
2127 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
|
2128 return JNI_ENOMEM; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2129 } |
| 342 | 2130 _cmThread = _cm->cmThread(); |
| 2131 | |
| 2132 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2133 HeapRegionRemSet::init_heap(max_regions()); | |
| 2134 | |
| 677 | 2135 // Now expand into the initial heap size. |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2136 if (!expand(init_byte_size)) { |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
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7207
diff
changeset
|
2137 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
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|
2138 return JNI_ENOMEM; |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2139 } |
| 342 | 2140 |
| 2141 // Perform any initialization actions delegated to the policy. | |
| 2142 g1_policy()->init(); | |
| 2143 | |
| 2144 _refine_cte_cl = | |
| 2145 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
| 2146 g1_rem_set(), | |
| 2147 concurrent_g1_refine()); | |
| 2148 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 2149 | |
| 2150 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2151 SATB_Q_FL_lock, | |
| 1111 | 2152 G1SATBProcessCompletedThreshold, |
| 342 | 2153 Shared_SATB_Q_lock); |
| 794 | 2154 |
| 2155 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
| 2156 DirtyCardQ_FL_lock, | |
| 1111 | 2157 concurrent_g1_refine()->yellow_zone(), |
| 2158 concurrent_g1_refine()->red_zone(), | |
| 794 | 2159 Shared_DirtyCardQ_lock); |
| 2160 | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2161 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2162 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2163 DirtyCardQ_FL_lock, |
| 1111 | 2164 -1, // never trigger processing |
| 2165 -1, // no limit on length | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2166 Shared_DirtyCardQ_lock, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2167 &JavaThread::dirty_card_queue_set()); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2168 } |
| 1705 | 2169 |
| 2170 // Initialize the card queue set used to hold cards containing | |
| 2171 // references into the collection set. | |
| 2172 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
| 2173 DirtyCardQ_FL_lock, | |
| 2174 -1, // never trigger processing | |
| 2175 -1, // no limit on length | |
| 2176 Shared_DirtyCardQ_lock, | |
| 2177 &JavaThread::dirty_card_queue_set()); | |
| 2178 | |
| 342 | 2179 // In case we're keeping closure specialization stats, initialize those |
| 2180 // counts and that mechanism. | |
| 2181 SpecializationStats::clear(); | |
| 2182 | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
2183 // Here we allocate the dummy full region that is required by the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
2184 // 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
|
2185 // space here, lots of asserts fire. |
| 3766 | 2186 |
| 2187 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
| 2188 _g1_reserved.start()); | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2189 // 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
|
2190 // 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
|
2191 // 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
|
2192 // 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
|
2193 dummy_region->set_young(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2194 // Make sure it's full. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2195 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2196 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2197 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
2198 init_mutator_alloc_region(); |
|
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|
2199 |
|
3289
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|
2200 // Do create of the monitoring and management support so that |
|
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|
2201 // values in the heap have been properly initialized. |
|
3980
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|
2202 _g1mm = new G1MonitoringSupport(this); |
|
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|
2203 |
| 342 | 2204 return JNI_OK; |
| 2205 } | |
| 2206 | |
| 2207 void G1CollectedHeap::ref_processing_init() { | |
|
1974
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|
2208 // Reference processing in G1 currently works as follows: |
|
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|
2209 // |
|
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|
2210 // * There are two reference processor instances. One is |
|
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|
2211 // used to record and process discovered references |
|
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|
2212 // during concurrent marking; the other is used to |
|
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|
2213 // record and process references during STW pauses |
|
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|
2214 // (both full and incremental). |
|
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|
2215 // * Both ref processors need to 'span' the entire heap as |
|
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|
2216 // the regions in the collection set may be dotted around. |
|
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|
2217 // |
|
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|
2218 // * For the concurrent marking ref processor: |
|
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|
2219 // * Reference discovery is enabled at initial marking. |
|
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|
2220 // * Reference discovery is disabled and the discovered |
|
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|
2221 // references processed etc during remarking. |
|
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|
2222 // * Reference discovery is MT (see below). |
|
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|
2223 // * Reference discovery requires a barrier (see below). |
|
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|
2224 // * Reference processing may or may not be MT |
|
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|
2225 // (depending on the value of ParallelRefProcEnabled |
|
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|
2226 // and ParallelGCThreads). |
|
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|
2227 // * A full GC disables reference discovery by the CM |
|
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|
2228 // ref processor and abandons any entries on it's |
|
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|
2229 // discovered lists. |
|
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|
2230 // |
|
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|
2231 // * For the STW processor: |
|
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|
2232 // * Non MT discovery is enabled at the start of a full GC. |
|
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|
2233 // * Processing and enqueueing during a full GC is non-MT. |
|
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|
2234 // * During a full GC, references are processed after marking. |
|
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|
2235 // |
|
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|
2236 // * Discovery (may or may not be MT) is enabled at the start |
|
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|
2237 // of an incremental evacuation pause. |
|
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|
2238 // * References are processed near the end of a STW evacuation pause. |
|
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|
2239 // * For both types of GC: |
|
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|
2240 // * Discovery is atomic - i.e. not concurrent. |
|
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|
2241 // * Reference discovery will not need a barrier. |
|
1974
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|
2242 |
| 342 | 2243 SharedHeap::ref_processing_init(); |
| 2244 MemRegion mr = reserved_region(); | |
|
3979
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|
2245 |
|
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|
2246 // Concurrent Mark ref processor |
|
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|
2247 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
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|
2248 new ReferenceProcessor(mr, // span |
|
3979
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|
2249 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
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|
2250 // mt processing |
|
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|
2251 (int) ParallelGCThreads, |
|
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|
2252 // degree of mt processing |
|
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|
2253 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
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|
2254 // mt discovery |
|
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|
2255 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
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|
2256 // degree of mt discovery |
|
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|
2257 false, |
|
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|
2258 // Reference discovery is not atomic |
|
4dfb2df418f2
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|
2259 &_is_alive_closure_cm, |
|
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|
2260 // is alive closure |
|
4dfb2df418f2
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|
2261 // (for efficiency/performance) |
|
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|
2262 true); |
|
4dfb2df418f2
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|
2263 // Setting next fields of discovered |
|
4dfb2df418f2
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diff
changeset
|
2264 // lists requires a barrier. |
|
4dfb2df418f2
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|
2265 |
|
4dfb2df418f2
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changeset
|
2266 // STW ref processor |
|
4dfb2df418f2
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diff
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|
2267 _ref_processor_stw = |
|
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diff
changeset
|
2268 new ReferenceProcessor(mr, // span |
|
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diff
changeset
|
2269 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
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|
2270 // mt processing |
|
4dfb2df418f2
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|
2271 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
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diff
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|
2272 // degree of mt processing |
|
4dfb2df418f2
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3973
diff
changeset
|
2273 (ParallelGCThreads > 1), |
|
4dfb2df418f2
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diff
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|
2274 // mt discovery |
|
4dfb2df418f2
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|
2275 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
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|
2276 // degree of mt discovery |
|
4dfb2df418f2
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3973
diff
changeset
|
2277 true, |
|
4dfb2df418f2
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diff
changeset
|
2278 // Reference discovery is atomic |
|
4dfb2df418f2
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|
2279 &_is_alive_closure_stw, |
|
4dfb2df418f2
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|
2280 // is alive closure |
|
4dfb2df418f2
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diff
changeset
|
2281 // (for efficiency/performance) |
|
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diff
changeset
|
2282 false); |
|
4dfb2df418f2
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changeset
|
2283 // Setting next fields of discovered |
|
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|
2284 // lists requires a barrier. |
| 342 | 2285 } |
| 2286 | |
| 2287 size_t G1CollectedHeap::capacity() const { | |
| 2288 return _g1_committed.byte_size(); | |
| 2289 } | |
| 2290 | |
|
6254
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|
2291 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
|
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|
2292 assert(!hr->continuesHumongous(), "pre-condition"); |
|
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|
2293 hr->reset_gc_time_stamp(); |
|
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|
2294 if (hr->startsHumongous()) { |
|
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|
2295 uint first_index = hr->hrs_index() + 1; |
|
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|
2296 uint last_index = hr->last_hc_index(); |
|
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|
2297 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2298 HeapRegion* chr = region_at(i); |
|
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|
2299 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2300 chr->reset_gc_time_stamp(); |
|
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|
2301 } |
|
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|
2302 } |
|
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|
2303 } |
|
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|
2304 |
|
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|
2305 #ifndef PRODUCT |
|
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|
2306 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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|
2307 private: |
|
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|
2308 unsigned _gc_time_stamp; |
|
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|
2309 bool _failures; |
|
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|
2310 |
|
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|
2311 public: |
|
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|
2312 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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|
2313 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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|
2314 |
|
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|
2315 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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|
2316 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
|
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|
2317 if (_gc_time_stamp != region_gc_time_stamp) { |
|
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|
2318 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
|
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|
2319 "expected %d", HR_FORMAT_PARAMS(hr), |
|
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|
2320 region_gc_time_stamp, _gc_time_stamp); |
|
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|
2321 _failures = true; |
|
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|
2322 } |
|
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|
2323 return false; |
|
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|
2324 } |
|
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|
2325 |
|
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|
2326 bool failures() { return _failures; } |
|
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|
2327 }; |
|
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|
2328 |
|
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|
2329 void G1CollectedHeap::check_gc_time_stamps() { |
|
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|
2330 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
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changeset
|
2331 heap_region_iterate(&cl); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2332 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2333 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2334 #endif // PRODUCT |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2335 |
| 1705 | 2336 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2337 DirtyCardQueue* into_cset_dcq, | |
| 2338 bool concurrent, | |
| 342 | 2339 int worker_i) { |
| 889 | 2340 // 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
|
2341 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
|
2342 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2343 |
| 342 | 2344 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2345 int n_completed_buffers = 0; | |
| 1705 | 2346 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2347 n_completed_buffers++; |
| 2348 } | |
|
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
|
2349 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
| 342 | 2350 dcqs.clear_n_completed_buffers(); |
| 2351 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2352 } | |
| 2353 | |
| 2354 | |
| 2355 // Computes the sum of the storage used by the various regions. | |
| 2356 | |
| 2357 size_t G1CollectedHeap::used() const { | |
|
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2358 assert(Heap_lock->owner() != NULL, |
|
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2359 "Should be owned on this thread's behalf."); |
| 342 | 2360 size_t result = _summary_bytes_used; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2361 // 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
|
2362 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2363 if (hr != NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2364 result += hr->used(); |
| 342 | 2365 return result; |
| 2366 } | |
| 2367 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2368 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
|
2369 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
|
2370 return result; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2371 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2372 |
| 342 | 2373 class SumUsedClosure: public HeapRegionClosure { |
| 2374 size_t _used; | |
| 2375 public: | |
| 2376 SumUsedClosure() : _used(0) {} | |
| 2377 bool doHeapRegion(HeapRegion* r) { | |
| 2378 if (!r->continuesHumongous()) { | |
| 2379 _used += r->used(); | |
| 2380 } | |
| 2381 return false; | |
| 2382 } | |
| 2383 size_t result() { return _used; } | |
| 2384 }; | |
| 2385 | |
| 2386 size_t G1CollectedHeap::recalculate_used() const { | |
| 2387 SumUsedClosure blk; | |
| 3766 | 2388 heap_region_iterate(&blk); |
| 342 | 2389 return blk.result(); |
| 2390 } | |
| 2391 | |
| 2392 size_t G1CollectedHeap::unsafe_max_alloc() { | |
| 2152 | 2393 if (free_regions() > 0) return HeapRegion::GrainBytes; |
| 342 | 2394 // otherwise, is there space in the current allocation region? |
| 2395 | |
| 2396 // We need to store the current allocation region in a local variable | |
| 2397 // here. The problem is that this method doesn't take any locks and | |
| 2398 // there may be other threads which overwrite the current allocation | |
| 2399 // region field. attempt_allocation(), for example, sets it to NULL | |
| 2400 // and this can happen *after* the NULL check here but before the call | |
| 2401 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
| 2402 // to be a problem in the optimized build, since the two loads of the | |
| 2403 // current allocation region field are optimized away. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2404 HeapRegion* hr = _mutator_alloc_region.get(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2405 if (hr == NULL) { |
| 342 | 2406 return 0; |
| 2407 } | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2408 return hr->free(); |
| 342 | 2409 } |
| 2410 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2411 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
|
2412 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2413 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
|
2414 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
|
2415 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
|
2416 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2417 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2418 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2419 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2420 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2421 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2422 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2423 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2424 // 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
|
2425 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2426 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2427 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2428 // 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
|
2429 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2430 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2431 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2432 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2433 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2434 // 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
|
2435 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2436 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2437 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2438 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2439 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2440 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2441 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2442 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
|
2443 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
|
2444 _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
|
2445 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
|
2446 _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
|
2447 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2448 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2449 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2450 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2451 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
|
2452 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2453 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2454 // 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
|
2455 // 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
|
2456 // 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
|
2457 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2458 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2459 // 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
|
2460 // 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
|
2461 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2462 // 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
|
2463 // 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
|
2464 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2465 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2466 // 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
|
2467 assert(concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2468 (_old_marking_cycles_started == _old_marking_cycles_completed + 1) || |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2469 (_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
|
2470 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
|
2471 "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
|
2472 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2473 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2474 // 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
|
2475 assert(!concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2476 (_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
|
2477 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
|
2478 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2479 "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
|
2480 _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
|
2481 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2482 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2483 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2484 // 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
|
2485 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2486 // is set) so that if a waiter requests another System.gc() it doesn't |
| 10405 | 2487 // incorrectly see that a marking cycle is still in progress. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2488 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
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|
2489 _cmThread->clear_in_progress(); |
|
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6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
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|
2490 } |
|
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6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
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|
2491 |
|
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|
2492 // This notify_all() will ensure that a thread that called |
|
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|
2493 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
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|
2494 // and it's waiting for a full GC to finish will be woken up. It is |
|
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|
2495 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
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|
2496 FullGCCount_lock->notify_all(); |
|
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|
2497 } |
|
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|
2498 |
| 10405 | 2499 void G1CollectedHeap::register_concurrent_cycle_start(jlong start_time) { |
| 2500 _concurrent_cycle_started = true; | |
| 2501 _gc_timer_cm->register_gc_start(start_time); | |
| 2502 | |
| 2503 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
| 2504 trace_heap_before_gc(_gc_tracer_cm); | |
| 2505 } | |
| 2506 | |
| 2507 void G1CollectedHeap::register_concurrent_cycle_end() { | |
| 2508 if (_concurrent_cycle_started) { | |
| 2509 _gc_timer_cm->register_gc_end(os::elapsed_counter()); | |
| 2510 | |
| 2511 if (_cm->has_aborted()) { | |
| 2512 _gc_tracer_cm->report_concurrent_mode_failure(); | |
| 2513 } | |
| 2514 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); | |
| 2515 | |
| 2516 _concurrent_cycle_started = false; | |
| 2517 } | |
| 2518 } | |
| 2519 | |
| 2520 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
| 2521 if (_concurrent_cycle_started) { | |
| 2522 trace_heap_after_gc(_gc_tracer_cm); | |
| 2523 } | |
| 2524 } | |
| 2525 | |
| 2526 G1YCType G1CollectedHeap::yc_type() { | |
| 2527 bool is_young = g1_policy()->gcs_are_young(); | |
| 2528 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
| 2529 bool is_during_mark = mark_in_progress(); | |
| 2530 | |
| 2531 if (is_initial_mark) { | |
| 2532 return InitialMark; | |
| 2533 } else if (is_during_mark) { | |
| 2534 return DuringMark; | |
| 2535 } else if (is_young) { | |
| 2536 return Normal; | |
| 2537 } else { | |
| 2538 return Mixed; | |
| 2539 } | |
| 2540 } | |
| 2541 | |
|
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|
2542 void G1CollectedHeap::collect(GCCause::Cause cause) { |
|
4910
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|
2543 assert_heap_not_locked(); |
|
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|
2544 |
|
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|
2545 unsigned int gc_count_before; |
|
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|
2546 unsigned int old_marking_count_before; |
|
4910
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|
2547 bool retry_gc; |
|
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|
2548 |
|
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|
2549 do { |
|
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|
2550 retry_gc = false; |
|
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|
2551 |
|
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|
2552 { |
|
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|
2553 MutexLocker ml(Heap_lock); |
|
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|
2554 |
|
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|
2555 // Read the GC count while holding the Heap_lock |
|
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|
2556 gc_count_before = total_collections(); |
|
6120
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|
2557 old_marking_count_before = _old_marking_cycles_started; |
|
4910
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|
2558 } |
|
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|
2559 |
|
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|
2560 if (should_do_concurrent_full_gc(cause)) { |
|
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|
2561 // Schedule an initial-mark evacuation pause that will start a |
|
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|
2562 // concurrent cycle. We're setting word_size to 0 which means that |
|
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|
2563 // we are not requesting a post-GC allocation. |
|
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6944166: G1: explicit GCs are not always handled correctly
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|
2564 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2565 0, /* word_size */ |
|
4910
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|
2566 true, /* should_initiate_conc_mark */ |
|
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|
2567 g1_policy()->max_pause_time_ms(), |
|
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|
2568 cause); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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|
2569 |
|
1088
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6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
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|
2570 VMThread::execute(&op); |
|
4910
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|
2571 if (!op.pause_succeeded()) { |
|
6120
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|
2572 if (old_marking_count_before == _old_marking_cycles_started) { |
|
5963
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7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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|
2573 retry_gc = op.should_retry_gc(); |
|
4910
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|
2574 } else { |
|
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|
2575 // A Full GC happened while we were trying to schedule the |
|
caa4652b4414
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|
2576 // initial-mark GC. No point in starting a new cycle given |
|
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|
2577 // that the whole heap was collected anyway. |
|
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|
2578 } |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
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diff
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|
2579 |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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changeset
|
2580 if (retry_gc) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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diff
changeset
|
2581 if (GC_locker::is_active_and_needs_gc()) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
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diff
changeset
|
2582 GC_locker::stall_until_clear(); |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2583 } |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2584 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2585 } |
|
1656
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6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
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diff
changeset
|
2586 } else { |
|
4910
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|
2587 if (cause == GCCause::_gc_locker |
|
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
2588 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
caa4652b4414
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|
2589 |
|
caa4652b4414
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changeset
|
2590 // Schedule a standard evacuation pause. We're setting word_size |
|
caa4652b4414
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|
2591 // to 0 which means that we are not requesting a post-GC allocation. |
|
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|
2592 VM_G1IncCollectionPause op(gc_count_before, |
|
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|
2593 0, /* word_size */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
2594 false, /* should_initiate_conc_mark */ |
|
caa4652b4414
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|
2595 g1_policy()->max_pause_time_ms(), |
|
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|
2596 cause); |
|
caa4652b4414
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changeset
|
2597 VMThread::execute(&op); |
|
caa4652b4414
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|
2598 } else { |
|
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changeset
|
2599 // Schedule a Full GC. |
|
6120
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7172388: G1: _total_full_collections should not be incremented for concurrent cycles
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|
2600 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
|
4910
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|
2601 VMThread::execute(&op); |
|
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|
2602 } |
|
1088
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6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
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|
2603 } |
|
4910
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|
2604 } while (retry_gc); |
| 342 | 2605 } |
| 2606 | |
| 2607 bool G1CollectedHeap::is_in(const void* p) const { | |
| 4708 | 2608 if (_g1_committed.contains(p)) { |
| 2609 // Given that we know that p is in the committed space, | |
| 2610 // heap_region_containing_raw() should successfully | |
| 2611 // return the containing region. | |
| 2612 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2613 return hr->is_in(p); |
| 2614 } else { | |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
2615 return false; |
| 342 | 2616 } |
| 2617 } | |
| 2618 | |
| 2619 // Iteration functions. | |
| 2620 | |
| 2621 // Iterates an OopClosure over all ref-containing fields of objects | |
| 2622 // within a HeapRegion. | |
| 2623 | |
| 2624 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
| 2625 MemRegion _mr; | |
|
6725
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|
2626 ExtendedOopClosure* _cl; |
| 342 | 2627 public: |
|
6725
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changeset
|
2628 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
| 342 | 2629 : _mr(mr), _cl(cl) {} |
| 2630 bool doHeapRegion(HeapRegion* r) { | |
|
6254
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|
2631 if (!r->continuesHumongous()) { |
| 342 | 2632 r->oop_iterate(_cl); |
| 2633 } | |
| 2634 return false; | |
| 2635 } | |
| 2636 }; | |
| 2637 | |
|
6725
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|
2638 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
| 342 | 2639 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
| 3766 | 2640 heap_region_iterate(&blk); |
|
6725
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|
2641 } |
|
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|
2642 |
|
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|
2643 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
| 342 | 2644 IterateOopClosureRegionClosure blk(mr, cl); |
| 3766 | 2645 heap_region_iterate(&blk); |
| 342 | 2646 } |
| 2647 | |
| 2648 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2649 | |
| 2650 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2651 ObjectClosure* _cl; | |
| 2652 public: | |
| 2653 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2654 bool doHeapRegion(HeapRegion* r) { | |
| 2655 if (! r->continuesHumongous()) { | |
| 2656 r->object_iterate(_cl); | |
| 2657 } | |
| 2658 return false; | |
| 2659 } | |
| 2660 }; | |
| 2661 | |
|
6725
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|
2662 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
| 342 | 2663 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2664 heap_region_iterate(&blk); |
| 342 | 2665 } |
| 2666 | |
| 2667 // Calls a SpaceClosure on a HeapRegion. | |
| 2668 | |
| 2669 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2670 SpaceClosure* _cl; | |
| 2671 public: | |
| 2672 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2673 bool doHeapRegion(HeapRegion* r) { | |
| 2674 _cl->do_space(r); | |
| 2675 return false; | |
| 2676 } | |
| 2677 }; | |
| 2678 | |
| 2679 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2680 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2681 heap_region_iterate(&blk); |
| 342 | 2682 } |
| 2683 | |
| 3766 | 2684 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
| 2685 _hrs.iterate(cl); | |
| 342 | 2686 } |
| 2687 | |
| 2688 void | |
| 2689 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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|
2690 uint worker_id, |
|
4728
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7121618: Change type of number of GC workers to unsigned int.
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|
2691 uint no_of_par_workers, |
| 342 | 2692 jint claim_value) { |
|
6010
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6008
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|
2693 const uint regions = n_regions(); |
|
4728
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|
2694 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
4095
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|
2695 no_of_par_workers : |
|
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|
2696 1); |
|
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|
2697 assert(UseDynamicNumberOfGCThreads || |
|
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|
2698 no_of_par_workers == workers()->total_workers(), |
|
bca17e38de00
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|
2699 "Non dynamic should use fixed number of workers"); |
| 355 | 2700 // try to spread out the starting points of the workers |
|
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|
2701 const HeapRegion* start_hr = |
|
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2702 start_region_for_worker(worker_id, no_of_par_workers); |
|
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2703 const uint start_index = start_hr->hrs_index(); |
| 355 | 2704 |
| 2705 // each worker will actually look at all regions | |
|
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|
2706 for (uint count = 0; count < regions; ++count) { |
|
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|
2707 const uint index = (start_index + count) % regions; |
| 355 | 2708 assert(0 <= index && index < regions, "sanity"); |
| 2709 HeapRegion* r = region_at(index); | |
| 2710 // we'll ignore "continues humongous" regions (we'll process them | |
| 2711 // when we come across their corresponding "start humongous" | |
| 2712 // region) and regions already claimed | |
| 2713 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
| 2714 continue; | |
| 2715 } | |
| 2716 // OK, try to claim it | |
| 342 | 2717 if (r->claimHeapRegion(claim_value)) { |
| 355 | 2718 // success! |
| 2719 assert(!r->continuesHumongous(), "sanity"); | |
| 2720 if (r->startsHumongous()) { | |
| 2721 // If the region is "starts humongous" we'll iterate over its | |
| 2722 // "continues humongous" first; in fact we'll do them | |
| 2723 // first. The order is important. In on case, calling the | |
| 2724 // closure on the "starts humongous" region might de-allocate | |
| 2725 // and clear all its "continues humongous" regions and, as a | |
| 2726 // result, we might end up processing them twice. So, we'll do | |
| 2727 // them first (notice: most closures will ignore them anyway) and | |
| 2728 // then we'll do the "starts humongous" region. | |
|
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|
2729 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
| 355 | 2730 HeapRegion* chr = region_at(ch_index); |
| 2731 | |
| 2732 // if the region has already been claimed or it's not | |
| 2733 // "continues humongous" we're done | |
| 2734 if (chr->claim_value() == claim_value || | |
| 2735 !chr->continuesHumongous()) { | |
| 2736 break; | |
| 2737 } | |
| 2738 | |
| 10405 | 2739 // No one should have claimed it directly. We can given |
| 355 | 2740 // that we claimed its "starts humongous" region. |
| 2741 assert(chr->claim_value() != claim_value, "sanity"); | |
| 2742 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2743 | |
| 2744 if (chr->claimHeapRegion(claim_value)) { | |
| 10405 | 2745 // we should always be able to claim it; no one else should |
| 355 | 2746 // be trying to claim this region |
| 2747 | |
| 2748 bool res2 = cl->doHeapRegion(chr); | |
| 2749 assert(!res2, "Should not abort"); | |
| 2750 | |
| 2751 // Right now, this holds (i.e., no closure that actually | |
| 2752 // does something with "continues humongous" regions | |
| 2753 // clears them). We might have to weaken it in the future, | |
| 2754 // but let's leave these two asserts here for extra safety. | |
| 2755 assert(chr->continuesHumongous(), "should still be the case"); | |
| 2756 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2757 } else { | |
| 2758 guarantee(false, "we should not reach here"); | |
| 2759 } | |
| 2760 } | |
| 2761 } | |
| 2762 | |
| 2763 assert(!r->continuesHumongous(), "sanity"); | |
| 2764 bool res = cl->doHeapRegion(r); | |
| 2765 assert(!res, "Should not abort"); | |
| 2766 } | |
| 2767 } | |
| 2768 } | |
| 2769 | |
| 390 | 2770 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2771 public: | |
| 2772 bool doHeapRegion(HeapRegion* r) { | |
| 2773 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2774 return false; | |
| 2775 } | |
| 2776 }; | |
| 2777 | |
|
4783
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|
2778 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2779 ResetClaimValuesClosure blk; |
| 2780 heap_region_iterate(&blk); | |
| 2781 } | |
| 2782 | |
|
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2783 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
023652e49ac0
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|
2784 ResetClaimValuesClosure blk; |
|
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|
2785 collection_set_iterate(&blk); |
|
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|
2786 } |
|
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|
2787 |
| 355 | 2788 #ifdef ASSERT |
| 2789 // This checks whether all regions in the heap have the correct claim | |
| 2790 // value. I also piggy-backed on this a check to ensure that the | |
| 2791 // humongous_start_region() information on "continues humongous" | |
| 2792 // regions is correct. | |
| 2793 | |
| 2794 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2795 private: | |
| 2796 jint _claim_value; | |
|
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|
2797 uint _failures; |
| 355 | 2798 HeapRegion* _sh_region; |
|
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|
2799 |
| 355 | 2800 public: |
| 2801 CheckClaimValuesClosure(jint claim_value) : | |
| 2802 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2803 bool doHeapRegion(HeapRegion* r) { | |
| 2804 if (r->claim_value() != _claim_value) { | |
|
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|
2805 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2806 "claim value = %d, should be %d", |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2807 HR_FORMAT_PARAMS(r), |
|
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|
2808 r->claim_value(), _claim_value); |
| 355 | 2809 ++_failures; |
| 2810 } | |
| 2811 if (!r->isHumongous()) { | |
| 2812 _sh_region = NULL; | |
| 2813 } else if (r->startsHumongous()) { | |
| 2814 _sh_region = r; | |
| 2815 } else if (r->continuesHumongous()) { | |
| 2816 if (r->humongous_start_region() != _sh_region) { | |
|
4097
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|
2817 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2818 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2819 HR_FORMAT_PARAMS(r), |
| 355 | 2820 r->humongous_start_region(), |
| 2821 _sh_region); | |
| 2822 ++_failures; | |
| 342 | 2823 } |
| 2824 } | |
| 355 | 2825 return false; |
| 2826 } | |
|
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|
2827 uint failures() { return _failures; } |
| 355 | 2828 }; |
| 2829 | |
| 2830 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2831 CheckClaimValuesClosure cl(claim_value); | |
| 2832 heap_region_iterate(&cl); | |
| 2833 return cl.failures() == 0; | |
| 2834 } | |
|
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|
2835 |
|
dc467e8b2c5e
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|
2836 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
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|
2837 private: |
|
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|
2838 jint _claim_value; |
|
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|
2839 uint _failures; |
|
4097
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|
2840 |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2841 public: |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2842 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
6010
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|
2843 _claim_value(claim_value), _failures(0) { } |
|
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|
2844 |
|
720b6a76dd9d
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|
2845 uint failures() { return _failures; } |
|
4097
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|
2846 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2847 bool doHeapRegion(HeapRegion* hr) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2848 assert(hr->in_collection_set(), "how?"); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2849 assert(!hr->isHumongous(), "H-region in CSet"); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2850 if (hr->claim_value() != _claim_value) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2851 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2852 "claim value = %d, should be %d", |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2853 HR_FORMAT_PARAMS(hr), |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2854 hr->claim_value(), _claim_value); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2855 _failures += 1; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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diff
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|
2856 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2857 return false; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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4095
diff
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|
2858 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2859 }; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2860 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2861 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2862 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2863 collection_set_iterate(&cl); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2864 return cl.failures() == 0; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2865 } |
| 355 | 2866 #endif // ASSERT |
| 342 | 2867 |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2868 // Clear the cached CSet starting regions and (more importantly) |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2869 // the time stamps. Called when we reset the GC time stamp. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2870 void G1CollectedHeap::clear_cset_start_regions() { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2871 assert(_worker_cset_start_region != NULL, "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2872 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2873 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2874 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2875 for (int i = 0; i < n_queues; i++) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2876 _worker_cset_start_region[i] = NULL; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2877 _worker_cset_start_region_time_stamp[i] = 0; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2878 } |
|
fd2b426c30db
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|
2879 } |
|
fd2b426c30db
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changeset
|
2880 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2881 // Given the id of a worker, obtain or calculate a suitable |
|
fd2b426c30db
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changeset
|
2882 // starting region for iterating over the current collection set. |
|
4097
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|
2883 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(int worker_i) { |
|
4709
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changeset
|
2884 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2885 |
|
fd2b426c30db
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|
2886 HeapRegion* result = NULL; |
|
fd2b426c30db
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diff
changeset
|
2887 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2888 |
|
fd2b426c30db
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changeset
|
2889 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
|
fd2b426c30db
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changeset
|
2890 // Cached starting region for current worker was set |
|
fd2b426c30db
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changeset
|
2891 // during the current pause - so it's valid. |
|
fd2b426c30db
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changeset
|
2892 // Note: the cached starting heap region may be NULL |
|
fd2b426c30db
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changeset
|
2893 // (when the collection set is empty). |
|
fd2b426c30db
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diff
changeset
|
2894 result = _worker_cset_start_region[worker_i]; |
|
fd2b426c30db
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changeset
|
2895 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
fd2b426c30db
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diff
changeset
|
2896 return result; |
|
fd2b426c30db
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diff
changeset
|
2897 } |
|
fd2b426c30db
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changeset
|
2898 |
|
fd2b426c30db
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changeset
|
2899 // The cached entry was not valid so let's calculate |
|
fd2b426c30db
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changeset
|
2900 // a suitable starting heap region for this worker. |
|
fd2b426c30db
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|
2901 |
|
fd2b426c30db
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changeset
|
2902 // We want the parallel threads to start their collection |
|
fd2b426c30db
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diff
changeset
|
2903 // set iteration at different collection set regions to |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2904 // avoid contention. |
|
fd2b426c30db
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diff
changeset
|
2905 // If we have: |
|
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4708
diff
changeset
|
2906 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2907 // p threads |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2908 // 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
|
2909 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2910 result = g1_policy()->collection_set(); |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2911 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2912 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
|
2913 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
|
2914 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2915 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2916 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2917 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2918 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
|
2919 uint start_ind = 0; |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2920 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2921 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2922 _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
|
2923 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2924 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2925 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
|
2926 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
|
2927 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2928 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2929 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
|
2930 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2931 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2932 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2933 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2934 // 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
|
2935 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2936 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
|
2937 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
|
2938 "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
|
2939 _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
|
2940 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2941 _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
|
2942 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2943 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2944 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2945 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2946 uint no_of_par_workers) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2947 uint worker_num = |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2948 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
|
2949 assert(UseDynamicNumberOfGCThreads || |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2950 no_of_par_workers == workers()->total_workers(), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2951 "Non dynamic should use fixed number of workers"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2952 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
|
2953 return region_at(start_index); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2954 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2955 |
| 342 | 2956 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2957 HeapRegion* r = g1_policy()->collection_set(); | |
| 2958 while (r != NULL) { | |
| 2959 HeapRegion* next = r->next_in_collection_set(); | |
| 2960 if (cl->doHeapRegion(r)) { | |
| 2961 cl->incomplete(); | |
| 2962 return; | |
| 2963 } | |
| 2964 r = next; | |
| 2965 } | |
| 2966 } | |
| 2967 | |
| 2968 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2969 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2970 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2971 // 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
|
2972 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2973 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2974 |
| 342 | 2975 assert(r->in_collection_set(), |
| 2976 "Start region must be a member of the collection set."); | |
| 2977 HeapRegion* cur = r; | |
| 2978 while (cur != NULL) { | |
| 2979 HeapRegion* next = cur->next_in_collection_set(); | |
| 2980 if (cl->doHeapRegion(cur) && false) { | |
| 2981 cl->incomplete(); | |
| 2982 return; | |
| 2983 } | |
| 2984 cur = next; | |
| 2985 } | |
| 2986 cur = g1_policy()->collection_set(); | |
| 2987 while (cur != r) { | |
| 2988 HeapRegion* next = cur->next_in_collection_set(); | |
| 2989 if (cl->doHeapRegion(cur) && false) { | |
| 2990 cl->incomplete(); | |
| 2991 return; | |
| 2992 } | |
| 2993 cur = next; | |
| 2994 } | |
| 2995 } | |
| 2996 | |
| 2997 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
| 3766 | 2998 return n_regions() > 0 ? region_at(0) : NULL; |
| 342 | 2999 } |
| 3000 | |
| 3001 | |
| 3002 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
| 3003 Space* res = heap_region_containing(addr); | |
| 3004 return res; | |
| 3005 } | |
| 3006 | |
| 3007 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 3008 Space* sp = space_containing(addr); | |
| 3009 if (sp != NULL) { | |
| 3010 return sp->block_start(addr); | |
| 3011 } | |
| 3012 return NULL; | |
| 3013 } | |
| 3014 | |
| 3015 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 3016 Space* sp = space_containing(addr); | |
| 3017 assert(sp != NULL, "block_size of address outside of heap"); | |
| 3018 return sp->block_size(addr); | |
| 3019 } | |
| 3020 | |
| 3021 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 3022 Space* sp = space_containing(addr); | |
| 3023 return sp->block_is_obj(addr); | |
| 3024 } | |
| 3025 | |
| 3026 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 3027 return true; | |
| 3028 } | |
| 3029 | |
| 3030 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 3031 return HeapRegion::GrainBytes; | |
| 3032 } | |
| 3033 | |
| 3034 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 3035 // Return the remaining space in the cur alloc region, but not less than | |
| 3036 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3037 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3038 // Also, this value can be at most the humongous object threshold, |
| 10405 | 3039 // 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
|
3040 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3041 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3042 HeapRegion* hr = _mutator_alloc_region.get(); |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3043 size_t max_tlab_size = _humongous_object_threshold_in_words * wordSize; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3044 if (hr == NULL) { |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3045 return max_tlab_size; |
| 342 | 3046 } else { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3047 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab_size); |
| 342 | 3048 } |
| 3049 } | |
| 3050 | |
| 3051 size_t G1CollectedHeap::max_capacity() const { | |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
3052 return _g1_reserved.byte_size(); |
| 342 | 3053 } |
| 3054 | |
| 3055 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 3056 // assert(false, "NYI"); | |
| 3057 return 0; | |
| 3058 } | |
| 3059 | |
| 3060 void G1CollectedHeap::prepare_for_verify() { | |
| 3061 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 3062 ensure_parsability(false); | |
| 3063 } | |
| 3064 g1_rem_set()->prepare_for_verify(); | |
| 3065 } | |
| 3066 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3067 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3068 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3069 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3070 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3071 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3072 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3073 return hr->obj_allocated_since_next_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3074 case VerifyOption_G1UseMarkWord: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3075 return false; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3076 default: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3077 ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3078 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3079 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3080 } |
|
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 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
|
3083 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3084 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
|
3085 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
|
3086 case VerifyOption_G1UseMarkWord: return NULL; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3087 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3088 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3089 return NULL; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3090 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3091 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3092 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3093 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3094 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3095 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3096 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3097 default: ShouldNotReachHere(); |
|
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|
3098 } |
|
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|
3099 return false; // keep some compilers happy |
|
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|
3100 } |
|
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|
3101 |
|
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|
3102 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
|
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3103 switch (vo) { |
|
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3104 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
|
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3105 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
|
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3106 case VerifyOption_G1UseMarkWord: return "NONE"; |
|
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3107 default: ShouldNotReachHere(); |
|
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|
3108 } |
|
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|
3109 return NULL; // keep some compilers happy |
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3110 } |
|
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|
3111 |
| 342 | 3112 class VerifyLivenessOopClosure: public OopClosure { |
|
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3113 G1CollectedHeap* _g1h; |
|
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3114 VerifyOption _vo; |
| 342 | 3115 public: |
|
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3116 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
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3117 _g1h(g1h), _vo(vo) |
|
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|
3118 { } |
|
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|
3119 void do_oop(narrowOop *p) { do_oop_work(p); } |
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|
3120 void do_oop( oop *p) { do_oop_work(p); } |
|
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3121 |
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|
3122 template <class T> void do_oop_work(T *p) { |
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3123 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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3124 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
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|
3125 "Dead object referenced by a not dead object"); |
| 342 | 3126 } |
| 3127 }; | |
| 3128 | |
| 3129 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3130 private: |
| 342 | 3131 G1CollectedHeap* _g1h; |
| 3132 size_t _live_bytes; | |
| 3133 HeapRegion *_hr; | |
|
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3134 VerifyOption _vo; |
| 342 | 3135 public: |
|
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3136 // _vo == UsePrevMarking -> use "prev" marking information, |
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3137 // _vo == UseNextMarking -> use "next" marking information, |
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|
3138 // _vo == UseMarkWord -> use mark word from object header. |
|
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|
3139 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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|
3140 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3141 _g1h = G1CollectedHeap::heap(); |
| 3142 } | |
| 3143 void do_object(oop o) { | |
|
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|
3144 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3145 assert(o != NULL, "Huh?"); |
|
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|
3146 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
|
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|
3147 // If the object is alive according to the mark word, |
|
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|
3148 // then verify that the marking information agrees. |
|
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|
3149 // Note we can't verify the contra-positive of the |
|
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|
3150 // above: if the object is dead (according to the mark |
|
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|
3151 // word), it may not be marked, or may have been marked |
|
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|
3152 // but has since became dead, or may have been allocated |
|
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|
3153 // since the last marking. |
|
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|
3154 if (_vo == VerifyOption_G1UseMarkWord) { |
|
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|
3155 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
|
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|
3156 } |
|
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|
3157 |
|
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|
3158 o->oop_iterate_no_header(&isLive); |
|
1389
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|
3159 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
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|
3160 size_t obj_size = o->size(); // Make sure we don't overflow |
|
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|
3161 _live_bytes += (obj_size * HeapWordSize); |
|
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|
3162 } |
| 342 | 3163 } |
| 3164 } | |
| 3165 size_t live_bytes() { return _live_bytes; } | |
| 3166 }; | |
| 3167 | |
| 3168 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3169 HeapRegion *_hr; | |
| 3170 G1CollectedHeap *_g1; | |
| 3171 public: | |
| 3172 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3173 _g1 = G1CollectedHeap::heap(); | |
| 3174 }; | |
| 3175 | |
| 3176 void do_object(oop o) { | |
| 3177 if (o != NULL) { | |
| 3178 HeapWord *start = (HeapWord *) o; | |
| 3179 size_t word_sz = o->size(); | |
| 3180 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3181 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3182 (void*) o, word_sz, | |
| 3183 _g1->isMarkedPrev(o), | |
| 3184 _g1->isMarkedNext(o), | |
| 3185 _hr->obj_allocated_since_prev_marking(o)); | |
| 3186 HeapWord *end = start + word_sz; | |
| 3187 HeapWord *cur; | |
| 3188 int *val; | |
| 3189 for (cur = start; cur < end; cur++) { | |
| 3190 val = (int *) cur; | |
| 3191 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3192 } | |
| 3193 } | |
| 3194 } | |
| 3195 }; | |
| 3196 | |
| 3197 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3198 private: |
|
6254
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|
3199 bool _par; |
|
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|
3200 VerifyOption _vo; |
|
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|
3201 bool _failures; |
| 811 | 3202 public: |
|
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|
3203 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3204 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3205 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3206 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3207 : _par(par), | |
|
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|
3208 _vo(vo), |
|
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|
3209 _failures(false) {} |
|
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|
3210 |
|
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|
3211 bool failures() { |
|
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|
3212 return _failures; |
|
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|
3213 } |
|
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|
3214 |
| 342 | 3215 bool doHeapRegion(HeapRegion* r) { |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
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diff
changeset
|
3216 if (!r->continuesHumongous()) { |
|
1020
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|
3217 bool failures = false; |
| 6008 | 3218 r->verify(_vo, &failures); |
|
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|
3219 if (failures) { |
|
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|
3220 _failures = true; |
|
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|
3221 } else { |
|
3772
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|
3222 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
1020
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changeset
|
3223 r->object_iterate(¬_dead_yet_cl); |
|
4787
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|
3224 if (_vo != VerifyOption_G1UseNextMarking) { |
|
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|
3225 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
2ace1c4ee8da
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|
3226 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
2ace1c4ee8da
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|
3227 "max_live_bytes "SIZE_FORMAT" " |
|
2ace1c4ee8da
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changeset
|
3228 "< calculated "SIZE_FORMAT, |
|
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|
3229 r->bottom(), r->end(), |
|
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changeset
|
3230 r->max_live_bytes(), |
|
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|
3231 not_dead_yet_cl.live_bytes()); |
|
4787
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|
3232 _failures = true; |
|
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|
3233 } |
|
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|
3234 } else { |
|
2ace1c4ee8da
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changeset
|
3235 // When vo == UseNextMarking we cannot currently do a sanity |
|
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|
3236 // check on the live bytes as the calculation has not been |
|
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|
3237 // finalized yet. |
|
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|
3238 } |
|
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|
3239 } |
| 342 | 3240 } |
|
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|
3241 return false; // stop the region iteration if we hit a failure |
| 342 | 3242 } |
| 3243 }; | |
| 3244 | |
|
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|
3245 class YoungRefCounterClosure : public OopClosure { |
|
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|
3246 G1CollectedHeap* _g1h; |
|
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|
3247 int _count; |
|
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|
3248 public: |
|
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|
3249 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} |
|
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|
3250 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } |
|
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|
3251 void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
|
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|
3252 |
|
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|
3253 int count() { return _count; } |
|
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|
3254 void reset_count() { _count = 0; }; |
|
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|
3255 }; |
|
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|
3256 |
|
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|
3257 class VerifyKlassClosure: public KlassClosure { |
|
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|
3258 YoungRefCounterClosure _young_ref_counter_closure; |
|
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|
3259 OopClosure *_oop_closure; |
|
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|
3260 public: |
|
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|
3261 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} |
|
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|
3262 void do_klass(Klass* k) { |
|
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3263 k->oops_do(_oop_closure); |
|
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|
3264 |
|
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|
3265 _young_ref_counter_closure.reset_count(); |
|
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|
3266 k->oops_do(&_young_ref_counter_closure); |
|
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3267 if (_young_ref_counter_closure.count() > 0) { |
|
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|
3268 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); |
|
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|
3269 } |
|
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|
3270 } |
|
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|
3271 }; |
|
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|
3272 |
|
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|
3273 // TODO: VerifyRootsClosure extends OopsInGenClosure so that we can |
|
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|
3274 // pass it as the perm_blk to SharedHeap::process_strong_roots. |
|
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3275 // When process_strong_roots stop calling perm_blk->younger_refs_iterate |
|
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|
3276 // we can change this closure to extend the simpler OopClosure. |
| 342 | 3277 class VerifyRootsClosure: public OopsInGenClosure { |
| 3278 private: | |
| 3279 G1CollectedHeap* _g1h; | |
|
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|
3280 VerifyOption _vo; |
| 342 | 3281 bool _failures; |
| 3282 public: | |
|
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3283 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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3284 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3285 // _vo == UseMarkWord -> use mark word from object header. |
|
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|
3286 VerifyRootsClosure(VerifyOption vo) : |
|
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|
3287 _g1h(G1CollectedHeap::heap()), |
|
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|
3288 _vo(vo), |
|
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|
3289 _failures(false) { } |
| 342 | 3290 |
| 3291 bool failures() { return _failures; } | |
| 3292 | |
|
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|
3293 template <class T> void do_oop_nv(T* p) { |
|
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|
3294 T heap_oop = oopDesc::load_heap_oop(p); |
|
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|
3295 if (!oopDesc::is_null(heap_oop)) { |
|
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|
3296 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
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|
3297 if (_g1h->is_obj_dead_cond(obj, _vo)) { |
| 342 | 3298 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " |
|
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|
3299 "points to dead obj "PTR_FORMAT, p, (void*) obj); |
|
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|
3300 if (_vo == VerifyOption_G1UseMarkWord) { |
|
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|
3301 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); |
|
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|
3302 } |
| 342 | 3303 obj->print_on(gclog_or_tty); |
| 3304 _failures = true; | |
| 3305 } | |
| 3306 } | |
| 3307 } | |
|
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|
3308 |
|
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|
3309 void do_oop(oop* p) { do_oop_nv(p); } |
|
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|
3310 void do_oop(narrowOop* p) { do_oop_nv(p); } |
| 342 | 3311 }; |
| 3312 | |
| 390 | 3313 // This is the task used for parallel heap verification. |
| 3314 | |
| 3315 class G1ParVerifyTask: public AbstractGangTask { | |
| 3316 private: | |
| 3317 G1CollectedHeap* _g1h; | |
|
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|
3318 VerifyOption _vo; |
|
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|
3319 bool _failures; |
| 390 | 3320 |
| 3321 public: | |
|
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|
3322 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3323 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3324 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3325 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3326 AbstractGangTask("Parallel verify task"), |
|
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|
3327 _g1h(g1h), |
|
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|
3328 _vo(vo), |
|
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|
3329 _failures(false) { } |
|
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|
3330 |
|
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|
3331 bool failures() { |
|
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|
3332 return _failures; |
|
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|
3333 } |
| 390 | 3334 |
|
4728
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|
3335 void work(uint worker_id) { |
|
637
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|
3336 HandleMark hm; |
| 6008 | 3337 VerifyRegionClosure blk(true, _vo); |
|
4728
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|
3338 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
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|
3339 _g1h->workers()->active_workers(), |
| 390 | 3340 HeapRegion::ParVerifyClaimValue); |
|
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|
3341 if (blk.failures()) { |
|
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|
3342 _failures = true; |
|
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|
3343 } |
| 390 | 3344 } |
| 3345 }; | |
| 3346 | |
| 6008 | 3347 void G1CollectedHeap::verify(bool silent) { |
| 3348 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3349 } | |
| 3350 | |
| 3351 void G1CollectedHeap::verify(bool silent, | |
|
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|
3352 VerifyOption vo) { |
|
8855
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|
3353 if (SafepointSynchronize::is_at_safepoint()) { |
|
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|
3354 if (!silent) { gclog_or_tty->print("Roots "); } |
|
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|
3355 VerifyRootsClosure rootsCl(vo); |
|
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|
3356 |
|
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changeset
|
3357 assert(Thread::current()->is_VM_thread(), |
|
8855
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|
3358 "Expected to be executed serially by the VM thread at this point"); |
|
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|
3359 |
|
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|
3360 CodeBlobToOopClosure blobsCl(&rootsCl, /*do_marking=*/ false); |
|
6725
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|
3361 VerifyKlassClosure klassCl(this, &rootsCl); |
|
3772
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|
3362 |
|
3293
1f4413413144
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3289
diff
changeset
|
3363 // We apply the relevant closures to all the oops in the |
|
1f4413413144
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3289
diff
changeset
|
3364 // system dictionary, the string table and the code cache. |
|
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
3365 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
|
3772
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|
3366 |
|
6725
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|
3367 // Need cleared claim bits for the strong roots processing |
|
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|
3368 ClassLoaderDataGraph::clear_claimed_marks(); |
|
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|
3369 |
|
3293
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3289
diff
changeset
|
3370 process_strong_roots(true, // activate StrongRootsScope |
|
6725
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changeset
|
3371 false, // we set "is scavenging" to false, |
|
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|
3372 // so we don't reset the dirty cards. |
|
4910
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diff
changeset
|
3373 ScanningOption(so), // roots scanning options |
| 342 | 3374 &rootsCl, |
|
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|
3375 &blobsCl, |
|
6725
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|
3376 &klassCl |
|
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|
3377 ); |
|
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|
3378 |
|
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changeset
|
3379 bool failures = rootsCl.failures(); |
|
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changeset
|
3380 |
|
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changeset
|
3381 if (vo != VerifyOption_G1UseMarkWord) { |
|
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changeset
|
3382 // If we're verifying during a full GC then the region sets |
|
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changeset
|
3383 // will have been torn down at the start of the GC. Therefore |
|
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changeset
|
3384 // verifying the region sets will fail. So we only verify |
|
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diff
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|
3385 // the region sets when not in a full GC. |
|
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changeset
|
3386 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
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3766
diff
changeset
|
3387 verify_region_sets(); |
|
6747fd0512e0
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3766
diff
changeset
|
3388 } |
|
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|
3389 |
| 2152 | 3390 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3391 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3392 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3393 "sanity check"); | |
| 3394 | |
| 6008 | 3395 G1ParVerifyTask task(this, vo); |
|
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|
3396 assert(UseDynamicNumberOfGCThreads || |
|
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|
3397 workers()->active_workers() == workers()->total_workers(), |
|
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|
3398 "If not dynamic should be using all the workers"); |
|
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|
3399 int n_workers = workers()->active_workers(); |
| 390 | 3400 set_par_threads(n_workers); |
| 3401 workers()->run_task(&task); | |
| 3402 set_par_threads(0); | |
|
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|
3403 if (task.failures()) { |
|
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|
3404 failures = true; |
|
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|
3405 } |
| 390 | 3406 |
|
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|
3407 // Checks that the expected amount of parallel work was done. |
|
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|
3408 // The implication is that n_workers is > 0. |
| 390 | 3409 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3410 "sanity check"); | |
| 3411 | |
| 3412 reset_heap_region_claim_values(); | |
| 3413 | |
| 3414 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3415 "sanity check"); | |
| 3416 } else { | |
| 6008 | 3417 VerifyRegionClosure blk(false, vo); |
| 3766 | 3418 heap_region_iterate(&blk); |
|
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|
3419 if (blk.failures()) { |
|
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changeset
|
3420 failures = true; |
|
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|
3421 } |
| 390 | 3422 } |
| 2152 | 3423 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3424 rem_set()->verify(); |
|
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|
3425 |
|
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diff
changeset
|
3426 if (failures) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3427 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3428 // 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
|
3429 // 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
|
3430 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3431 print_extended_on(gclog_or_tty); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3432 gclog_or_tty->print_cr(""); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3433 #ifndef PRODUCT |
| 1044 | 3434 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3435 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3436 vo, false /* all */); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3437 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3438 #endif |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3439 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3440 } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3441 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3442 } else { |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3443 if (!silent) |
|
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3444 gclog_or_tty->print("(SKIPPING roots, heapRegionSets, heapRegions, remset) "); |
| 342 | 3445 } |
| 3446 } | |
| 3447 | |
| 3448 class PrintRegionClosure: public HeapRegionClosure { | |
| 3449 outputStream* _st; | |
| 3450 public: | |
| 3451 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3452 bool doHeapRegion(HeapRegion* r) { | |
| 3453 r->print_on(_st); | |
| 3454 return false; | |
| 3455 } | |
| 3456 }; | |
| 3457 | |
| 3458 void G1CollectedHeap::print_on(outputStream* st) const { | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3459 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3460 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
|
3461 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3462 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3463 _g1_storage.low_boundary(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3464 _g1_storage.high(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3465 _g1_storage.high_boundary()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3466 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3467 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
|
3468 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3469 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
|
3470 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3471 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
|
3472 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
|
3473 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3474 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3475 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3476 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3477 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3478 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3479 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3480 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3481 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3482 st->cr(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3483 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
|
3484 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3485 "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
|
3486 "PTAMS=previous top-at-mark-start, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3487 "NTAMS=next top-at-mark-start)"); |
| 342 | 3488 PrintRegionClosure blk(st); |
| 3766 | 3489 heap_region_iterate(&blk); |
| 342 | 3490 } |
| 3491 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3492 void G1CollectedHeap::print_on_error(outputStream* st) const { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3493 this->CollectedHeap::print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3494 |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3495 if (_cm != NULL) { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3496 st->cr(); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3497 _cm->print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3498 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3499 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3500 |
| 342 | 3501 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3502 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3503 workers()->print_worker_threads_on(st); |
| 3504 } | |
| 3505 _cmThread->print_on(st); | |
| 342 | 3506 st->cr(); |
| 1019 | 3507 _cm->print_worker_threads_on(st); |
| 3508 _cg1r->print_worker_threads_on(st); | |
| 342 | 3509 } |
| 3510 | |
| 3511 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3512 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3513 workers()->threads_do(tc); |
| 3514 } | |
| 3515 tc->do_thread(_cmThread); | |
| 794 | 3516 _cg1r->threads_do(tc); |
| 342 | 3517 } |
| 3518 | |
| 3519 void G1CollectedHeap::print_tracing_info() const { | |
| 3520 // We'll overload this to mean "trace GC pause statistics." | |
| 3521 if (TraceGen0Time || TraceGen1Time) { | |
| 3522 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3523 // to that. | |
| 3524 g1_policy()->print_tracing_info(); | |
| 3525 } | |
| 751 | 3526 if (G1SummarizeRSetStats) { |
| 342 | 3527 g1_rem_set()->print_summary_info(); |
| 3528 } | |
| 1282 | 3529 if (G1SummarizeConcMark) { |
| 342 | 3530 concurrent_mark()->print_summary_info(); |
| 3531 } | |
| 3532 g1_policy()->print_yg_surv_rate_info(); | |
| 3533 SpecializationStats::print(); | |
| 3534 } | |
| 3535 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3536 #ifndef PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3537 // Helpful for debugging RSet issues. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3538 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3539 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3540 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3541 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3542 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3543 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3544 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3545 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3546 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3547 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3548 _occupied_sum += occupied; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3549 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3550 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
|
3551 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3552 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3553 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3554 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3555 hrrs->print(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3556 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3557 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3558 return false; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3559 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3560 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3561 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3562 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3563 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3564 gclog_or_tty->print_cr(msg); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3565 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3566 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3567 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3568 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3569 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
|
3570 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3571 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3572 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3573 }; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3574 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3575 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3576 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3577 collection_set_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3578 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3579 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3580 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3581 PrintRSetsClosure cl("Printing All RSets");; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3582 heap_region_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3583 } |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3584 #endif // PRODUCT |
|
e8b0b0392037
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parents:
3774
diff
changeset
|
3585 |
| 342 | 3586 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3587 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3588 "not a garbage-first heap"); | |
| 3589 return _g1h; | |
| 3590 } | |
| 3591 | |
| 3592 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3593 // always_do_update_barrier = false; |
| 342 | 3594 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3595 // Fill TLAB's and such | |
| 3596 ensure_parsability(true); | |
| 3597 } | |
| 3598 | |
| 3599 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3600 |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3601 if (G1SummarizeRSetStats && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3602 (G1SummarizeRSetStatsPeriod > 0) && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3603 // 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
|
3604 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3605 g1_rem_set()->print_periodic_summary_info(); |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3606 } |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3607 |
| 342 | 3608 // FIXME: what is this about? |
| 3609 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3610 // is set. | |
| 3611 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3612 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3613 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3614 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3615 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3616 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3617 Universe::update_heap_info_at_gc(); |
| 342 | 3618 } |
| 3619 | |
| 1973 | 3620 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3621 unsigned int gc_count_before, | |
| 3622 bool* succeeded) { | |
| 3623 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 3624 g1_policy()->record_stop_world_start(); |
| 1973 | 3625 VM_G1IncCollectionPause op(gc_count_before, |
| 3626 word_size, | |
| 3627 false, /* should_initiate_conc_mark */ | |
| 3628 g1_policy()->max_pause_time_ms(), | |
| 3629 GCCause::_g1_inc_collection_pause); | |
| 3630 VMThread::execute(&op); | |
| 3631 | |
| 3632 HeapWord* result = op.result(); | |
| 3633 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3634 assert(result == NULL || ret_succeeded, | |
| 3635 "the result should be NULL if the VM did not succeed"); | |
| 3636 *succeeded = ret_succeeded; | |
| 3637 | |
| 3638 assert_heap_not_locked(); | |
| 3639 return result; | |
| 342 | 3640 } |
| 3641 | |
| 3642 void | |
| 3643 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3644 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
|
3645 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3646 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3647 CGC_lock->notify(); |
| 342 | 3648 } |
| 3649 } | |
| 3650 | |
| 3651 size_t G1CollectedHeap::pending_card_num() { | |
| 3652 size_t extra_cards = 0; | |
| 3653 JavaThread *curr = Threads::first(); | |
| 3654 while (curr != NULL) { | |
| 3655 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3656 extra_cards += dcq.size(); | |
| 3657 curr = curr->next(); | |
| 3658 } | |
| 3659 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3660 size_t buffer_size = dcqs.buffer_size(); | |
| 3661 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3662 |
| 3663 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3664 // in bytes - not the number of 'entries'. We need to convert | |
| 3665 // into a number of cards. | |
| 3666 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3667 } |
| 3668 | |
| 3669 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3670 return g1_rem_set()->cardsScanned(); |
| 342 | 3671 } |
| 3672 | |
| 3673 void | |
| 3674 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3675 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3676 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3677 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3678 if (_surviving_young_words == NULL) { |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3679 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
| 342 | 3680 "Not enough space for young surv words summary."); |
| 3681 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3682 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
|
3683 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3684 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
|
3685 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3686 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3687 #endif // !ASSERT |
| 342 | 3688 } |
| 3689 | |
| 3690 void | |
| 3691 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3692 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
|
3693 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
|
3694 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3695 _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
|
3696 } |
| 342 | 3697 } |
| 3698 | |
| 3699 void | |
| 3700 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3701 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3702 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3703 _surviving_young_words = NULL; |
| 3704 } | |
| 3705 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3706 #ifdef ASSERT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3707 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3708 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3709 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3710 // 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
|
3711 // 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
|
3712 // 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
|
3713 // 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
|
3714 // 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
|
3715 // 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
|
3716 // 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
|
3717 // 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
|
3718 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3719 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
|
3720 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3721 // 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
|
3722 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3723 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3724 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3725 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3726 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3727 |
| 1709 | 3728 #if TASKQUEUE_STATS |
| 3729 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3730 st->print_raw_cr("GC Task Stats"); | |
| 3731 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3732 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3733 } | |
| 3734 | |
| 3735 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3736 print_taskqueue_stats_hdr(st); | |
| 3737 | |
| 3738 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3739 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3740 for (int i = 0; i < n; ++i) { |
| 3741 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3742 totals += task_queue(i)->stats; | |
| 3743 } | |
| 3744 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3745 | |
| 3746 DEBUG_ONLY(totals.verify()); | |
| 3747 } | |
| 3748 | |
| 3749 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3750 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3751 for (int i = 0; i < n; ++i) { |
| 3752 task_queue(i)->stats.reset(); | |
| 3753 } | |
| 3754 } | |
| 3755 #endif // TASKQUEUE_STATS | |
| 3756 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3757 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3758 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3759 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3760 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3761 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3762 gclog_or_tty->date_stamp(PrintGCDateStamps); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3763 gclog_or_tty->stamp(PrintGCTimeStamps); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3764 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3765 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
|
3766 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3767 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3768 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3769 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3770 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3771 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3772 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3773 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3774 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3775 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3776 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3777 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3778 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3779 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3780 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3781 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
|
3782 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3783 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3784 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3785 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3786 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3787 gclog_or_tty->print("--"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3788 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3789 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3790 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
|
3791 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3792 gclog_or_tty->flush(); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3793 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3794 |
| 1973 | 3795 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3796 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3797 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3798 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3799 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3800 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3801 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3802 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3803 |
| 10405 | 3804 _gc_timer_stw->register_gc_start(os::elapsed_counter()); |
| 3805 | |
| 3806 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
| 3807 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3808 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3809 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3810 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3811 print_heap_before_gc(); |
| 10405 | 3812 trace_heap_before_gc(_gc_tracer_stw); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3813 |
| 4072 | 3814 HRSPhaseSetter x(HRSPhaseEvacuation); |
| 2152 | 3815 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3816 verify_dirty_young_regions(); |
| 2152 | 3817 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3818 // 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
|
3819 // 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
|
3820 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3821 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3822 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3823 // 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
|
3824 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3825 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3826 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3827 // 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
|
3828 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
|
3829 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3830 // 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
|
3831 // 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
|
3832 // 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
|
3833 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
|
3834 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3835 // 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
|
3836 { |
| 10405 | 3837 EvacuationInfo evacuation_info; |
| 3838 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3839 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3840 // 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
|
3841 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3842 increment_old_marking_cycles_started(); |
| 10405 | 3843 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
|
3844 } |
| 10405 | 3845 |
| 3846 _gc_tracer_stw->report_yc_type(yc_type()); | |
| 3847 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3848 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3849 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3850 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
|
3851 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
|
3852 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
|
3853 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3854 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3855 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3856 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3857 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3858 |
| 2361 | 3859 // If the secondary_free_list is not empty, append it to the |
| 3860 // free_list. No need to wait for the cleanup operation to finish; | |
| 3861 // the region allocation code will check the secondary_free_list | |
| 3862 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3863 // set, skip this step so that the region allocation code has to | |
| 3864 // get entries from the secondary_free_list. | |
| 2152 | 3865 if (!G1StressConcRegionFreeing) { |
| 2361 | 3866 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3867 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3868 |
|
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3869 assert(check_young_list_well_formed(), |
|
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3870 "young list should be well formed"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3871 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3872 // 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
|
3873 // 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
|
3874 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3875 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3876 { // 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
|
3877 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3878 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3879 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3880 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
|
3881 increment_gc_time_stamp(); |
| 342 | 3882 |
|
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
|
3883 verify_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3884 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3885 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3886 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3887 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3888 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3889 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3890 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3891 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3892 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3893 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3894 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3895 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3896 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3897 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3898 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3899 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3900 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3901 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3902 // 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
|
3903 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3904 release_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3905 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3906 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3907 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3908 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3909 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3910 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3911 // 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
|
3912 // 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
|
3913 // 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
|
3914 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3915 // 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
|
3916 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3917 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3918 // 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
|
3919 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3920 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3921 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3922 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3923 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3924 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
|
3925 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3926 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
3927 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
|
3928 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3929 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3930 // 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
|
3931 // 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
|
3932 // 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
|
3933 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3934 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
|
3935 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3936 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3937 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
|
3938 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
|
3939 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3940 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
|
3941 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3942 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3943 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3944 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3945 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3946 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3947 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3948 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3949 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3950 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3951 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3952 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3953 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3954 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
|
3955 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3956 |
| 10405 | 3957 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3958 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3959 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3960 // 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
|
3961 // 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
|
3962 // 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
|
3963 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3964 _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
|
3965 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3966 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3967 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3968 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3969 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3970 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3971 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3972 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3973 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3974 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3975 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3976 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3977 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3978 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3979 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3980 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3981 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3982 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3983 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3984 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3985 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3986 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3987 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3988 #endif // ASSERT |
| 1707 | 3989 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3990 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3991 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3992 // Initialize the GC alloc regions. |
| 10405 | 3993 init_gc_alloc_regions(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3994 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3995 // Actually do the work... |
| 10405 | 3996 evacuate_collection_set(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3998 // 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
|
3999 // (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
|
4000 // 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
|
4001 // 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
|
4002 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4003 _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
|
4004 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4005 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4006 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4007 |
| 10405 | 4008 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4009 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4010 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4011 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4012 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4013 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4014 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4015 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4016 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4017 // regions to the incremental collection set for the next |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4018 // evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4019 clear_cset_fast_test(); |
|
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 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4027 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4028 "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
|
4029 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4030 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4033 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4034 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4035 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
| 10405 | 4036 _young_list->first_survivor_region(), |
| 4037 _young_list->last_survivor_region()); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4038 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4039 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4040 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 _summary_bytes_used = recalculate_used(); |
| 10405 | 4043 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
| 4044 for (uint i = 0; i < n_queues; i++) { | |
| 4045 if (_evacuation_failed_info_array[i].has_failed()) { | |
| 4046 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
| 4047 } | |
| 4048 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4049 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4050 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4051 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4052 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4053 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4054 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4055 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4056 // 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
|
4057 // 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
|
4058 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4059 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4060 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4061 // 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
|
4062 // 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
|
4063 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4065 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4066 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4067 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4068 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4069 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4070 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4071 g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4072 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4073 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4074 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4075 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4076 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4077 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4078 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 size_t bytes_before = capacity(); |
| 4785 | 4080 // No need for an ergo verbose message here, |
| 4081 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4082 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4087 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4088 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4089 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4090 |
| 10405 | 4091 // 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
|
4092 // 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
|
4093 _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
|
4094 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4095 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4096 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4097 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4098 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4099 // 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
|
4100 // 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
|
4101 // 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
|
4102 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
|
4103 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
| 10405 | 4104 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
|
4105 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4106 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4107 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4108 // 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
|
4109 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4110 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4111 // 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
|
4112 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4113 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4114 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4115 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4117 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4118 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4119 // 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
|
4120 // 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
|
4121 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 // 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
|
4123 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4130 |
|
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
|
4131 verify_after_gc(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4132 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4133 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4134 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4135 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4136 // 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
|
4137 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4138 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4139 // 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
|
4140 // 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
|
4141 // 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
|
4142 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4143 _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
|
4144 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4145 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4146 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4147 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4148 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4149 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4150 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4151 #endif |
| 342 | 4152 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4153 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4154 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4155 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4156 // 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
|
4157 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
|
4158 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4159 // 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
|
4160 // 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
|
4161 // 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
|
4162 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4163 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4164 _hrs.verify_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4165 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4166 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4167 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
|
4168 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4169 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4170 print_heap_after_gc(); |
| 10405 | 4171 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
|
4172 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4173 // 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
|
4174 // 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
|
4175 // 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
|
4176 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4177 g1mm()->update_sizes(); |
| 10405 | 4178 |
| 4179 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
| 4180 _gc_tracer_stw->report_tenuring_threshold(_g1_policy->tenuring_threshold()); | |
| 4181 _gc_timer_stw->register_gc_end(os::elapsed_counter()); | |
| 4182 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); | |
| 4183 } | |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4184 // 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
|
4185 // 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
|
4186 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4187 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4188 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4189 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4190 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4191 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4192 // 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
|
4193 // 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
|
4194 // not start until the safepoint itself is released in |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4195 // ConcurrentGCThread::safepoint_desynchronize(). |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4196 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4197 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4198 |
| 1973 | 4199 return true; |
| 342 | 4200 } |
| 4201 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4202 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4203 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4204 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4205 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4206 case GCAllocForSurvived: |
| 6595 | 4207 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4208 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4209 case GCAllocForTenured: |
| 6595 | 4210 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4211 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4212 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4213 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4214 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4215 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4216 } |
| 6595 | 4217 |
| 4218 // Prevent humongous PLAB sizes for two reasons: | |
| 4219 // * PLABs are allocated using a similar paths as oops, but should | |
| 4220 // never be in a humongous region | |
| 4221 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4222 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
|
4223 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4224 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4225 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4226 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4227 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4228 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4229 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4230 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4231 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4232 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4233 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4234 |
| 10405 | 4235 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
|
4236 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
|
4237 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4238 _survivor_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4239 _old_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4240 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
|
4241 _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
|
4242 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4243 // 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
|
4244 // 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
|
4245 // 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
|
4246 // 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
|
4247 // 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
|
4248 // 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
|
4249 // during a cleanup and was added to the free list, but |
| 10405 | 4250 // 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
|
4251 // 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
|
4252 if (retained_region != NULL && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4253 !retained_region->in_collection_set() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4254 !(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
|
4255 !retained_region->is_empty() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4256 !retained_region->isHumongous()) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4257 retained_region->set_saved_mark(); |
| 4072 | 4258 // The retained region was added to the old region set when it was |
| 4259 // retired. We have to remove it now, since we don't allow regions | |
| 4260 // we allocate to in the region sets. We'll re-add it later, when | |
| 4261 // it's retired again. | |
| 4262 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4263 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
|
4264 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
|
4265 _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
|
4266 _hr_printer.reuse(retained_region); |
| 10405 | 4267 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
| 4268 } | |
| 4269 } | |
| 4270 | |
| 4271 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { | |
| 4272 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
| 4273 _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
|
4274 _survivor_gc_alloc_region.release(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4275 // 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
|
4276 // _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
|
4277 // _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
|
4278 // 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
|
4279 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4280 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 6595 | 4281 |
| 4282 if (ResizePLAB) { | |
| 6819 | 4283 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
| 4284 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
| 6595 | 4285 } |
| 342 | 4286 } |
| 4287 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4288 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
|
4289 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
|
4290 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
|
4291 _retained_old_gc_alloc_region = NULL; |
| 342 | 4292 } |
| 4293 | |
| 4294 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4295 _drain_in_progress = false; | |
| 4296 set_evac_failure_closure(cl); | |
| 6197 | 4297 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4298 } |
| 4299 | |
| 4300 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4301 assert(_evac_failure_scan_stack != NULL && | |
| 4302 _evac_failure_scan_stack->length() == 0, | |
| 4303 "Postcondition"); | |
| 4304 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4305 delete _evac_failure_scan_stack; |
| 342 | 4306 _evac_failure_scan_stack = NULL; |
| 4307 } | |
| 4308 | |
| 4309 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
|
4310 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
|
4311 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4312 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4313 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4314 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4315 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4316 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4317 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4318 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4319 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4320 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4321 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4322 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
|
4323 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4324 // 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
|
4325 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4326 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4327 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4328 |
| 4329 // 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
|
4330 assert(_objs_with_preserved_marks.size() == |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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7455
diff
changeset
|
4331 _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:
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diff
changeset
|
4332 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:
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diff
changeset
|
4333 oop obj = _objs_with_preserved_marks.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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diff
changeset
|
4334 markOop m = _preserved_marks_of_objs.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
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diff
changeset
|
4335 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
|
4336 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4337 _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
|
4338 _preserved_marks_of_objs.clear(true); |
| 342 | 4339 } |
| 4340 | |
| 4341 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4342 _evac_failure_scan_stack->push(obj); | |
| 4343 } | |
| 4344 | |
| 4345 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4346 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4347 | |
| 4348 while (_evac_failure_scan_stack->length() > 0) { | |
| 4349 oop obj = _evac_failure_scan_stack->pop(); | |
| 4350 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4351 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4352 } | |
| 4353 } | |
| 4354 | |
| 4355 oop | |
| 10405 | 4356 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
|
4357 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
|
4358 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
|
4359 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
|
4360 (HeapWord*) old)); |
| 342 | 4361 markOop m = old->mark(); |
| 4362 oop forward_ptr = old->forward_to_atomic(old); | |
| 4363 if (forward_ptr == NULL) { | |
| 4364 // Forward-to-self succeeded. | |
| 10405 | 4365 assert(_par_scan_state != NULL, "par scan state"); |
| 4366 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
| 4367 uint queue_num = _par_scan_state->queue_num(); | |
| 4368 | |
| 4369 _evacuation_failed = true; | |
| 4370 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
| 342 | 4371 if (_evac_failure_closure != cl) { |
| 4372 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4373 assert(!_drain_in_progress, | |
| 4374 "Should only be true while someone holds the lock."); | |
| 4375 // Set the global evac-failure closure to the current thread's. | |
| 4376 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4377 set_evac_failure_closure(cl); | |
| 4378 // Now do the common part. | |
| 4379 handle_evacuation_failure_common(old, m); | |
| 4380 // Reset to NULL. | |
| 4381 set_evac_failure_closure(NULL); | |
| 4382 } else { | |
| 4383 // The lock is already held, and this is recursive. | |
| 4384 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4385 handle_evacuation_failure_common(old, m); | |
| 4386 } | |
| 4387 return old; | |
| 4388 } 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
|
4389 // 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
|
4390 // 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
|
4391 // 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
|
4392 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
|
4393 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
|
4394 "should not be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
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parents:
3317
diff
changeset
|
4395 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4396 return forward_ptr; |
| 4397 } | |
| 4398 } | |
| 4399 | |
| 4400 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4401 preserve_mark_if_necessary(old, m); | |
| 4402 | |
| 4403 HeapRegion* r = heap_region_containing(old); | |
| 4404 if (!r->evacuation_failed()) { | |
| 4405 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4406 _hr_printer.evac_failure(r); |
| 342 | 4407 } |
| 4408 | |
| 4409 push_on_evac_failure_scan_stack(old); | |
| 4410 | |
| 4411 if (!_drain_in_progress) { | |
| 4412 // prevent recursion in copy_to_survivor_space() | |
| 4413 _drain_in_progress = true; | |
| 4414 drain_evac_failure_scan_stack(); | |
| 4415 _drain_in_progress = false; | |
| 4416 } | |
| 4417 } | |
| 4418 | |
| 4419 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
|
4420 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4421 // 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
|
4422 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4423 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
|
4424 _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
|
4425 _preserved_marks_of_objs.push(m); |
| 342 | 4426 } |
| 4427 } | |
| 4428 | |
| 4429 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4430 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4431 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4432 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
|
4433 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4434 return result; |
| 342 | 4435 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4436 // 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
|
4437 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4438 return old_attempt_allocation(word_size); |
| 342 | 4439 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4440 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4441 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4442 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
|
4443 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4444 return result; |
| 342 | 4445 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4446 // 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
|
4447 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4448 return survivor_attempt_allocation(word_size); |
| 342 | 4449 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4450 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4451 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4452 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4453 // 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
|
4454 return NULL; |
| 342 | 4455 } |
| 4456 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4457 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
|
4458 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4459 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4460 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num) |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4461 : _g1h(g1h), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4462 _refs(g1h->task_queue(queue_num)), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4463 _dcq(&g1h->dirty_card_queue_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4464 _ct_bs((CardTableModRefBS*)_g1h->barrier_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4465 _g1_rem(g1h->g1_rem_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4466 _hash_seed(17), _queue_num(queue_num), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4467 _term_attempts(0), |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4468 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4469 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4470 _age_table(false), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4471 _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
|
4472 _alloc_buffer_waste(0), _undo_waste(0) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4473 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4474 // 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
|
4475 // non-young regions (where the age is -1) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4476 // 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
|
4477 // an attempt to eliminate cache contention |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4478 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
|
4479 uint array_length = PADDING_ELEM_NUM + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4480 real_length + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4481 PADDING_ELEM_NUM; |
| 6197 | 4482 _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
|
4483 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
|
4484 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
|
4485 "Not enough space for young surv histo."); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4486 _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
|
4487 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
|
4488 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4489 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4490 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4491 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4492 _start = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4493 } |
| 342 | 4494 |
| 1709 | 4495 void |
| 4496 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
| 4497 { | |
| 4498 st->print_raw_cr("GC Termination Stats"); | |
| 4499 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
| 4500 " ------waste (KiB)------"); | |
| 4501 st->print_raw_cr("thr ms ms % ms % attempts" | |
| 4502 " total alloc undo"); | |
| 4503 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
| 4504 " ------- ------- -------"); | |
| 4505 } | |
| 4506 | |
| 4507 void | |
| 4508 G1ParScanThreadState::print_termination_stats(int i, | |
| 4509 outputStream* const st) const | |
| 4510 { | |
| 4511 const double elapsed_ms = elapsed_time() * 1000.0; | |
| 4512 const double s_roots_ms = strong_roots_time() * 1000.0; | |
| 4513 const double term_ms = term_time() * 1000.0; | |
| 4514 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
| 4515 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
| 4516 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
| 4517 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
| 4518 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
| 4519 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
| 4520 alloc_buffer_waste() * HeapWordSize / K, | |
| 4521 undo_waste() * HeapWordSize / K); | |
| 4522 } | |
| 4523 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4524 #ifdef ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4525 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4526 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4527 assert(UseCompressedOops, "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4528 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4529 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4530 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4531 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4532 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4533 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4534 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4535 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4536 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4537 if (has_partial_array_mask(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4538 // Must be in the collection set--it's already been copied. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4539 oop p = clear_partial_array_mask(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4540 assert(_g1h->obj_in_cs(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4541 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4542 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4543 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4544 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4545 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4546 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4547 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4548 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4549 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4550 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4551 if (ref.is_narrow()) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4552 return verify_ref((narrowOop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4553 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4554 return verify_ref((oop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4555 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4556 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4557 #endif // ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4558 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4559 void G1ParScanThreadState::trim_queue() { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4560 assert(_evac_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4561 assert(_evac_failure_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4562 assert(_partial_scan_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4563 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4564 StarTask ref; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4565 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4566 // Drain the overflow stack first, so other threads can steal. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4567 while (refs()->pop_overflow(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4568 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4569 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4570 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4571 while (refs()->pop_local(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4572 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4573 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4574 } while (!refs()->is_empty()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4575 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4576 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4577 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4578 G1ParScanThreadState* par_scan_state) : |
| 342 | 4579 _g1(g1), _g1_rem(_g1->g1_rem_set()), _cm(_g1->concurrent_mark()), |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4580 _par_scan_state(par_scan_state), |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4581 _worker_id(par_scan_state->queue_num()), |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4582 _during_initial_mark(_g1->g1_policy()->during_initial_mark_pause()), |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4583 _mark_in_progress(_g1->mark_in_progress()) { } |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4584 |
| 5987 | 4585 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4586 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object>::mark_object(oop obj) { | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4587 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4588 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4589 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4590 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
|
4591 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4592 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4593 // 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
|
4594 _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
|
4595 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4596 |
| 5987 | 4597 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4598 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> | |
| 4599 ::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
|
4600 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4601 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
|
4602 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
|
4603 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
|
4604 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4605 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
|
4606 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4607 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
|
4608 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4609 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
|
4610 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4611 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
|
4612 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4613 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4614 // 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
|
4615 // 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
|
4616 // 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
|
4617 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4618 _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
|
4619 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4620 |
| 5987 | 4621 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4622 oop G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> | |
| 4623 ::copy_to_survivor_space(oop old) { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4624 size_t word_sz = old->size(); |
| 342 | 4625 HeapRegion* from_region = _g1->heap_region_containing_raw(old); |
| 4626 // +1 to make the -1 indexes valid... | |
| 4627 int young_index = from_region->young_index_in_cset()+1; | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4628 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
|
4629 (!from_region->is_young() && young_index == 0), "invariant" ); |
| 342 | 4630 G1CollectorPolicy* g1p = _g1->g1_policy(); |
| 4631 markOop m = old->mark(); | |
| 545 | 4632 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
| 4633 : m->age(); | |
| 4634 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
| 342 | 4635 word_sz); |
| 4636 HeapWord* obj_ptr = _par_scan_state->allocate(alloc_purpose, word_sz); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4637 #ifndef PRODUCT |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4638 // Should this evacuation fail? |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4639 if (_g1->evacuation_should_fail()) { |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4640 if (obj_ptr != NULL) { |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4641 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4642 obj_ptr = NULL; |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4643 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4644 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4645 #endif // !PRODUCT |
| 342 | 4646 |
| 4647 if (obj_ptr == NULL) { | |
| 4648 // This will either forward-to-self, or detect that someone else has | |
| 4649 // installed a forwarding pointer. | |
| 10405 | 4650 return _g1->handle_evacuation_failure_par(_par_scan_state, old); |
| 342 | 4651 } |
| 4652 | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4653 oop obj = oop(obj_ptr); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4654 |
| 526 | 4655 // We're going to allocate linearly, so might as well prefetch ahead. |
| 4656 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
| 4657 | |
| 342 | 4658 oop forward_ptr = old->forward_to_atomic(obj); |
| 4659 if (forward_ptr == NULL) { | |
| 4660 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
| 526 | 4661 if (g1p->track_object_age(alloc_purpose)) { |
| 4662 // We could simply do obj->incr_age(). However, this causes a | |
| 4663 // performance issue. obj->incr_age() will first check whether | |
| 4664 // the object has a displaced mark by checking its mark word; | |
| 4665 // getting the mark word from the new location of the object | |
| 4666 // stalls. So, given that we already have the mark word and we | |
| 4667 // are about to install it anyway, it's better to increase the | |
| 4668 // age on the mark word, when the object does not have a | |
| 4669 // displaced mark word. We're not expecting many objects to have | |
| 4670 // a displaced marked word, so that case is not optimized | |
| 4671 // further (it could be...) and we simply call obj->incr_age(). | |
| 4672 | |
| 4673 if (m->has_displaced_mark_helper()) { | |
| 4674 // in this case, we have to install the mark word first, | |
| 4675 // otherwise obj looks to be forwarded (the old mark word, | |
| 4676 // which contains the forward pointer, was copied) | |
| 4677 obj->set_mark(m); | |
| 4678 obj->incr_age(); | |
| 4679 } else { | |
| 4680 m = m->incr_age(); | |
| 545 | 4681 obj->set_mark(m); |
| 526 | 4682 } |
| 545 | 4683 _par_scan_state->age_table()->add(obj, word_sz); |
| 4684 } else { | |
| 4685 obj->set_mark(m); | |
| 526 | 4686 } |
| 4687 | |
| 342 | 4688 size_t* surv_young_words = _par_scan_state->surviving_young_words(); |
| 4689 surv_young_words[young_index] += word_sz; | |
| 4690 | |
| 4691 if (obj->is_objArray() && arrayOop(obj)->length() >= ParGCArrayScanChunk) { | |
|
4784
02838862dec8
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4783
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|
4692 // 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
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4783
diff
changeset
|
4693 // 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
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4783
diff
changeset
|
4694 // length field of the from-space object. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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diff
changeset
|
4695 arrayOop(obj)->set_length(0); |
|
845
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
4696 oop* old_p = set_partial_array_mask(old); |
|
df6caf649ff7
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ysr
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|
4697 _par_scan_state->push_on_queue(old_p); |
| 342 | 4698 } else { |
| 526 | 4699 // No point in using the slower heap_region_containing() method, |
| 4700 // given that we know obj is in the heap. | |
| 5987 | 4701 _scanner.set_region(_g1->heap_region_containing_raw(obj)); |
| 4702 obj->oop_iterate_backwards(&_scanner); | |
| 342 | 4703 } |
| 4704 } else { | |
| 4705 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); | |
| 4706 obj = forward_ptr; | |
| 4707 } | |
| 4708 return obj; | |
| 4709 } | |
| 4710 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4711 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4712 void G1ParCopyHelper::do_klass_barrier(T* p, oop new_obj) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4713 if (_g1->heap_region_containing_raw(new_obj)->is_young()) { |
|
da91efe96a93
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coleenp
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|
4714 _scanned_klass->record_modified_oops(); |
|
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coleenp
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|
4715 } |
|
da91efe96a93
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|
4716 } |
|
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|
4717 |
|
3886
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|
4718 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
|
845
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|
4719 template <class T> |
|
3886
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|
4720 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> |
|
845
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
4721 ::do_oop_work(T* p) { |
|
df6caf649ff7
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|
4722 oop obj = oopDesc::load_decode_heap_oop(p); |
| 342 | 4723 assert(barrier != G1BarrierRS || obj != NULL, |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
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|
4724 "Precondition: G1BarrierRS implies obj is non-NULL"); |
|
3886
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|
4725 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
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diff
changeset
|
4726 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
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|
4727 |
| 526 | 4728 // here the null check is implicit in the cset_fast_test() test |
|
1261
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iveresov
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diff
changeset
|
4729 if (_g1->in_cset_fast_test(obj)) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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changeset
|
4730 oop forwardee; |
| 526 | 4731 if (obj->is_forwarded()) { |
|
4787
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|
4732 forwardee = obj->forwardee(); |
| 526 | 4733 } else { |
|
4787
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diff
changeset
|
4734 forwardee = copy_to_survivor_space(obj); |
| 342 | 4735 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
4736 assert(forwardee != NULL, "forwardee should not be NULL"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
4737 oopDesc::encode_store_heap_oop(p, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4738 if (do_mark_object && forwardee != obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
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changeset
|
4739 // If the object is self-forwarded we don't need to explicitly |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
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|
4740 // mark it, the evacuation failure protocol will do so. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
4741 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
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changeset
|
4742 } |
|
2ace1c4ee8da
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diff
changeset
|
4743 |
| 526 | 4744 // When scanning the RS, we only care about objs in CS. |
| 4745 if (barrier == G1BarrierRS) { | |
|
4836
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6484965: G1: piggy-back liveness accounting phase on marking
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parents:
4834
diff
changeset
|
4746 _par_scan_state->update_rs(_from, p, _worker_id); |
|
6725
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|
4747 } else if (barrier == G1BarrierKlass) { |
|
da91efe96a93
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coleenp
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diff
changeset
|
4748 do_klass_barrier(p, forwardee); |
| 342 | 4749 } |
|
3886
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parents:
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changeset
|
4750 } else { |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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diff
changeset
|
4751 // The object is not in collection set. If we're a root scanning |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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diff
changeset
|
4752 // closure during an initial mark pause (i.e. do_mark_object will |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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parents:
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diff
changeset
|
4753 // be true) then attempt to mark the object. |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4754 if (do_mark_object && _g1->is_in_g1_reserved(obj)) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4755 mark_object(obj); |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
johnc
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diff
changeset
|
4756 } |
| 526 | 4757 } |
| 4758 | |
| 4759 if (barrier == G1BarrierEvac && obj != NULL) { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4760 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4761 } |
| 4762 | |
| 4763 if (do_gen_barrier && obj != NULL) { | |
| 4764 par_do_barrier(p); | |
| 4765 } | |
| 4766 } | |
| 4767 | |
|
1261
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iveresov
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diff
changeset
|
4768 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(oop* p); |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
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1245
diff
changeset
|
4769 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
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|
4770 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
changeset
|
4771 template <class T> void G1ParScanPartialArrayClosure::do_oop_nv(T* p) { |
| 526 | 4772 assert(has_partial_array_mask(p), "invariant"); |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4773 oop from_obj = clear_partial_array_mask(p); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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4783
diff
changeset
|
4774 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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4783
diff
changeset
|
4775 assert(Universe::heap()->is_in_reserved(from_obj), "must be in heap."); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4776 assert(from_obj->is_objArray(), "must be obj array"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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4783
diff
changeset
|
4777 objArrayOop from_obj_array = objArrayOop(from_obj); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4778 // The from-space object contains the real length. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4779 int length = from_obj_array->length(); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4780 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4781 assert(from_obj->is_forwarded(), "must be forwarded"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4782 oop to_obj = from_obj->forwardee(); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4783 assert(from_obj != to_obj, "should not be chunking self-forwarded objects"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4784 objArrayOop to_obj_array = objArrayOop(to_obj); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4785 // We keep track of the next start index in the length field of the |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4786 // to-space object. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4787 int next_index = to_obj_array->length(); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4788 assert(0 <= next_index && next_index < length, |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4789 err_msg("invariant, next index: %d, length: %d", next_index, length)); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4790 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
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4783
diff
changeset
|
4791 int start = next_index; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4792 int end = length; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4793 int remainder = end - start; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4794 // We'll try not to push a range that's smaller than ParGCArrayScanChunk. |
| 342 | 4795 if (remainder > 2 * ParGCArrayScanChunk) { |
| 4796 end = start + ParGCArrayScanChunk; | |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4797 to_obj_array->set_length(end); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4798 // Push the remainder before we process the range in case another |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
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4783
diff
changeset
|
4799 // worker has run out of things to do and can steal it. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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4783
diff
changeset
|
4800 oop* from_obj_p = set_partial_array_mask(from_obj); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
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4783
diff
changeset
|
4801 _par_scan_state->push_on_queue(from_obj_p); |
| 342 | 4802 } else { |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
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4783
diff
changeset
|
4803 assert(length == end, "sanity"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
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4783
diff
changeset
|
4804 // We'll process the final range for this object. Restore the length |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
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4783
diff
changeset
|
4805 // so that the heap remains parsable in case of evacuation failure. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4806 to_obj_array->set_length(end); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
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4783
diff
changeset
|
4807 } |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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4783
diff
changeset
|
4808 _scanner.set_region(_g1->heap_region_containing_raw(to_obj)); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
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4783
diff
changeset
|
4809 // Process indexes [start,end). It will also process the header |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
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4783
diff
changeset
|
4810 // along with the first chunk (i.e., the chunk with start == 0). |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4811 // Note that at this point the length field of to_obj_array is not |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4812 // correct given that we are using it to keep track of the next |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4813 // start index. oop_iterate_range() (thankfully!) ignores the length |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4814 // field and only relies on the start / end parameters. It does |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4815 // however return the size of the object which will be incorrect. So |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4816 // we have to ignore it even if we wanted to use it. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4817 to_obj_array->oop_iterate_range(&_scanner, start, end); |
| 342 | 4818 } |
| 4819 | |
| 4820 class G1ParEvacuateFollowersClosure : public VoidClosure { | |
| 4821 protected: | |
| 4822 G1CollectedHeap* _g1h; | |
| 4823 G1ParScanThreadState* _par_scan_state; | |
| 4824 RefToScanQueueSet* _queues; | |
| 4825 ParallelTaskTerminator* _terminator; | |
| 4826 | |
| 4827 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4828 RefToScanQueueSet* queues() { return _queues; } | |
| 4829 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4830 | |
| 4831 public: | |
| 4832 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4833 G1ParScanThreadState* par_scan_state, | |
| 4834 RefToScanQueueSet* queues, | |
| 4835 ParallelTaskTerminator* terminator) | |
| 4836 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4837 _queues(queues), _terminator(terminator) {} | |
| 4838 | |
|
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|
4839 void do_void(); |
|
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|
4840 |
|
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|
4841 private: |
|
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|
4842 inline bool offer_termination(); |
|
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|
4843 }; |
|
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|
4844 |
|
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|
4845 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
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|
4846 G1ParScanThreadState* const pss = par_scan_state(); |
|
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|
4847 pss->start_term_time(); |
|
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|
4848 const bool res = terminator()->offer_termination(); |
|
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|
4849 pss->end_term_time(); |
|
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|
4850 return res; |
|
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|
4851 } |
|
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|
4852 |
|
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|
4853 void G1ParEvacuateFollowersClosure::do_void() { |
|
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|
4854 StarTask stolen_task; |
|
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|
4855 G1ParScanThreadState* const pss = par_scan_state(); |
|
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|
4856 pss->trim_queue(); |
|
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|
4857 |
|
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|
4858 do { |
|
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|
4859 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
|
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|
4860 assert(pss->verify_task(stolen_task), "sanity"); |
|
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|
4861 if (stolen_task.is_narrow()) { |
|
1883
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|
4862 pss->deal_with_reference((narrowOop*) stolen_task); |
|
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|
4863 } else { |
|
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|
4864 pss->deal_with_reference((oop*) stolen_task); |
|
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|
4865 } |
|
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|
4866 |
|
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|
4867 // We've just processed a reference and we might have made |
|
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|
4868 // available new entries on the queues. So we have to make sure |
|
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|
4869 // we drain the queues as necessary. |
| 342 | 4870 pss->trim_queue(); |
| 4871 } | |
|
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|
4872 } while (!offer_termination()); |
|
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|
4873 |
|
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|
4874 pss->retire_alloc_buffers(); |
|
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|
4875 } |
| 342 | 4876 |
|
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|
4877 class G1KlassScanClosure : public KlassClosure { |
|
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|
4878 G1ParCopyHelper* _closure; |
|
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|
4879 bool _process_only_dirty; |
|
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|
4880 int _count; |
|
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|
4881 public: |
|
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|
4882 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
|
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4883 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
|
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|
4884 void do_klass(Klass* klass) { |
|
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|
4885 // If the klass has not been dirtied we know that there's |
|
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|
4886 // no references into the young gen and we can skip it. |
|
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|
4887 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
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|
4888 // Clean the klass since we're going to scavenge all the metadata. |
|
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|
4889 klass->clear_modified_oops(); |
|
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|
4890 |
|
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|
4891 // Tell the closure that this klass is the Klass to scavenge |
|
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|
4892 // and is the one to dirty if oops are left pointing into the young gen. |
|
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|
4893 _closure->set_scanned_klass(klass); |
|
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|
4894 |
|
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changeset
|
4895 klass->oops_do(_closure); |
|
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|
4896 |
|
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changeset
|
4897 _closure->set_scanned_klass(NULL); |
|
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6964458: Reimplement class meta-data storage to use native memory
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|
4898 } |
|
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6964458: Reimplement class meta-data storage to use native memory
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|
4899 _count++; |
|
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|
4900 } |
|
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|
4901 }; |
|
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|
4902 |
| 342 | 4903 class G1ParTask : public AbstractGangTask { |
| 4904 protected: | |
| 4905 G1CollectedHeap* _g1h; | |
| 4906 RefToScanQueueSet *_queues; | |
| 4907 ParallelTaskTerminator _terminator; | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4908 uint _n_workers; |
| 342 | 4909 |
| 4910 Mutex _stats_lock; | |
| 4911 Mutex* stats_lock() { return &_stats_lock; } | |
| 4912 | |
| 4913 size_t getNCards() { | |
| 4914 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 4915 / G1BlockOffsetSharedArray::N_bytes; | |
| 4916 } | |
| 4917 | |
| 4918 public: | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
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|
4919 G1ParTask(G1CollectedHeap* g1h, |
|
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4090
diff
changeset
|
4920 RefToScanQueueSet *task_queues) |
| 342 | 4921 : AbstractGangTask("G1 collection"), |
| 4922 _g1h(g1h), | |
| 4923 _queues(task_queues), | |
|
4095
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|
4924 _terminator(0, _queues), |
|
bca17e38de00
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4090
diff
changeset
|
4925 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4926 {} |
| 4927 | |
| 4928 RefToScanQueueSet* queues() { return _queues; } | |
| 4929 | |
| 4930 RefToScanQueue *work_queue(int i) { | |
| 4931 return queues()->queue(i); | |
| 4932 } | |
| 4933 | |
|
4095
bca17e38de00
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jmasa
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diff
changeset
|
4934 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
bca17e38de00
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jmasa
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changeset
|
4935 |
|
bca17e38de00
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diff
changeset
|
4936 virtual void set_for_termination(int active_workers) { |
|
bca17e38de00
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|
4937 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
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|
4938 // in the young space (_par_seq_tasks) in the G1 heap |
|
bca17e38de00
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jmasa
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|
4939 // for SequentialSubTasksDone. |
|
bca17e38de00
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|
4940 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
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|
4941 // both of which need setting by set_n_termination(). |
|
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|
4942 _g1h->SharedHeap::set_n_termination(active_workers); |
|
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|
4943 _g1h->set_n_termination(active_workers); |
|
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|
4944 terminator()->reset_for_reuse(active_workers); |
|
bca17e38de00
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|
4945 _n_workers = active_workers; |
|
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|
4946 } |
|
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changeset
|
4947 |
|
4728
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diff
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|
4948 void work(uint worker_id) { |
|
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4711
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changeset
|
4949 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 4950 |
| 4951 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
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6188
diff
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|
4952 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 4953 |
|
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|
4954 { |
|
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changeset
|
4955 ResourceMark rm; |
|
500023bd0818
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5963
diff
changeset
|
4956 HandleMark hm; |
|
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diff
changeset
|
4957 |
|
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diff
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|
4958 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
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|
4959 |
|
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diff
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|
4960 G1ParScanThreadState pss(_g1h, worker_id); |
|
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|
4961 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, rp); |
|
500023bd0818
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|
4962 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
500023bd0818
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|
4963 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, rp); |
|
500023bd0818
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|
4964 |
|
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diff
changeset
|
4965 pss.set_evac_closure(&scan_evac_cl); |
|
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diff
changeset
|
4966 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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diff
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|
4967 pss.set_partial_scan_closure(&partial_scan_cl); |
|
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|
4968 |
|
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diff
changeset
|
4969 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
|
6725
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|
4970 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
|
5986
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|
4971 |
|
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diff
changeset
|
4972 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
|
6725
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changeset
|
4973 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
|
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|
4974 |
|
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changeset
|
4975 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
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|
4976 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
|
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
4977 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
|
5986
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|
4978 |
|
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|
4979 OopClosure* scan_root_cl = &only_scan_root_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
4980 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
|
5986
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|
4981 |
|
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|
4982 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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|
4983 // We also need to mark copied objects. |
|
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|
4984 scan_root_cl = &scan_mark_root_cl; |
|
6725
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|
4985 scan_klasses_cl = &scan_mark_klasses_cl_s; |
|
5986
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|
4986 } |
|
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|
4987 |
|
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|
4988 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
500023bd0818
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|
4989 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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changeset
|
4990 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings | SharedHeap::SO_CodeCache; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4991 |
|
5986
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|
4992 pss.start_strong_roots(); |
|
6725
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|
4993 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
|
da91efe96a93
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|
4994 SharedHeap::ScanningOption(so), |
|
5986
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|
4995 scan_root_cl, |
|
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|
4996 &push_heap_rs_cl, |
|
6725
da91efe96a93
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|
4997 scan_klasses_cl, |
|
5986
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|
4998 worker_id); |
|
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changeset
|
4999 pss.end_strong_roots(); |
|
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|
5000 |
|
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|
5001 { |
|
500023bd0818
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|
5002 double start = os::elapsedTime(); |
|
500023bd0818
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changeset
|
5003 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
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|
5004 evac.do_void(); |
|
500023bd0818
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parents:
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changeset
|
5005 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
|
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parents:
5963
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changeset
|
5006 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
|
5007 _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
|
5008 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
|
5986
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parents:
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changeset
|
5009 } |
|
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changeset
|
5010 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
|
500023bd0818
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parents:
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diff
changeset
|
5011 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
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diff
changeset
|
5012 |
|
500023bd0818
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parents:
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diff
changeset
|
5013 if (ParallelGCVerbose) { |
|
500023bd0818
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parents:
5963
diff
changeset
|
5014 MutexLocker x(stats_lock()); |
|
500023bd0818
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parents:
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diff
changeset
|
5015 pss.print_termination_stats(worker_id); |
|
500023bd0818
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parents:
5963
diff
changeset
|
5016 } |
|
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parents:
5963
diff
changeset
|
5017 |
|
500023bd0818
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parents:
5963
diff
changeset
|
5018 assert(pss.refs()->is_empty(), "should be empty"); |
|
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parents:
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diff
changeset
|
5019 |
|
500023bd0818
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parents:
5963
diff
changeset
|
5020 // Close the inner scope so that the ResourceMark and HandleMark |
|
500023bd0818
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parents:
5963
diff
changeset
|
5021 // destructors are executed here and are included as part of the |
|
500023bd0818
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parents:
5963
diff
changeset
|
5022 // "GC Worker Time". |
| 342 | 5023 } |
| 5024 | |
| 1611 | 5025 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
|
5026 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 5027 } |
| 5028 }; | |
| 5029 | |
| 5030 // *** Common G1 Evacuation Stuff | |
| 5031 | |
|
5986
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parents:
5963
diff
changeset
|
5032 // Closures that support the filtering of CodeBlobs scanned during |
|
500023bd0818
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parents:
5963
diff
changeset
|
5033 // external root scanning. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5034 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5035 // Closure applied to reference fields in code blobs (specifically nmethods) |
|
500023bd0818
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parents:
5963
diff
changeset
|
5036 // to determine whether an nmethod contains references that point into |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5037 // the collection set. Used as a predicate when walking code roots so |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5038 // that only nmethods that point into the collection set are added to the |
|
500023bd0818
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parents:
5963
diff
changeset
|
5039 // 'marked' list. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5040 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5041 class G1FilteredCodeBlobToOopClosure : public CodeBlobToOopClosure { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5042 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5043 class G1PointsIntoCSOopClosure : public OopClosure { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5044 G1CollectedHeap* _g1; |
|
500023bd0818
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parents:
5963
diff
changeset
|
5045 bool _points_into_cs; |
|
500023bd0818
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parents:
5963
diff
changeset
|
5046 public: |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5047 G1PointsIntoCSOopClosure(G1CollectedHeap* g1) : |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5048 _g1(g1), _points_into_cs(false) { } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5049 |
|
500023bd0818
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parents:
5963
diff
changeset
|
5050 bool points_into_cs() const { return _points_into_cs; } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5051 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5052 template <class T> |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5053 void do_oop_nv(T* p) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5054 if (!_points_into_cs) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5055 T heap_oop = oopDesc::load_heap_oop(p); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5056 if (!oopDesc::is_null(heap_oop) && |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5057 _g1->in_cset_fast_test(oopDesc::decode_heap_oop_not_null(heap_oop))) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5058 _points_into_cs = true; |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
5059 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5060 } |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
5061 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5062 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5063 virtual void do_oop(oop* p) { do_oop_nv(p); } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5064 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
5065 }; |
|
500023bd0818
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parents:
5963
diff
changeset
|
5066 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5067 G1CollectedHeap* _g1; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5068 |
|
500023bd0818
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parents:
5963
diff
changeset
|
5069 public: |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5070 G1FilteredCodeBlobToOopClosure(G1CollectedHeap* g1, OopClosure* cl) : |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5071 CodeBlobToOopClosure(cl, true), _g1(g1) { } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5072 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5073 virtual void do_code_blob(CodeBlob* cb) { |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
5074 nmethod* nm = cb->as_nmethod_or_null(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5075 if (nm != NULL && !(nm->test_oops_do_mark())) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5076 G1PointsIntoCSOopClosure predicate_cl(_g1); |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
5077 nm->oops_do(&predicate_cl); |
|
500023bd0818
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parents:
5963
diff
changeset
|
5078 |
|
500023bd0818
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parents:
5963
diff
changeset
|
5079 if (predicate_cl.points_into_cs()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5080 // At least one of the reference fields or the oop relocations |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5081 // in the nmethod points into the collection set. We have to |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
5082 // 'mark' this nmethod. |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
5083 // Note: Revisit the following if CodeBlobToOopClosure::do_code_blob() |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5084 // or MarkingCodeBlobClosure::do_code_blob() change. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5085 if (!nm->test_set_oops_do_mark()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5086 do_newly_marked_nmethod(nm); |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
5087 } |
|
500023bd0818
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parents:
5963
diff
changeset
|
5088 } |
|
500023bd0818
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parents:
5963
diff
changeset
|
5089 } |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
5090 } |
|
500023bd0818
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5963
diff
changeset
|
5091 }; |
|
500023bd0818
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parents:
5963
diff
changeset
|
5092 |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5093 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5094 |
| 342 | 5095 void |
| 5096 G1CollectedHeap:: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5097 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
|
5098 ScanningOption so, |
| 342 | 5099 OopClosure* scan_non_heap_roots, |
| 5100 OopsInHeapRegionClosure* scan_rs, | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5101 G1KlassScanClosure* scan_klasses, |
| 342 | 5102 int worker_i) { |
|
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|
5103 |
|
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|
5104 // First scan the strong roots |
| 342 | 5105 double ext_roots_start = os::elapsedTime(); |
| 5106 double closure_app_time_sec = 0.0; | |
| 5107 | |
| 5108 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
| 5109 | |
|
989
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6863023: need non-perm oops in code cache for JSR 292
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diff
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|
5110 // Walk the code cache w/o buffering, because StarTask cannot handle |
|
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diff
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|
5111 // unaligned oop locations. |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5112 G1FilteredCodeBlobToOopClosure eager_scan_code_roots(this, scan_non_heap_roots); |
|
989
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6863023: need non-perm oops in code cache for JSR 292
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diff
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|
5113 |
|
148e5441d916
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diff
changeset
|
5114 process_strong_roots(false, // no scoping; this is parallel code |
|
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|
5115 is_scavenging, so, |
| 342 | 5116 &buf_scan_non_heap_roots, |
|
989
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diff
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|
5117 &eager_scan_code_roots, |
|
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|
5118 scan_klasses |
|
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changeset
|
5119 ); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5120 |
|
3979
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changeset
|
5121 // Now the CM ref_processor roots. |
|
3823
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diff
changeset
|
5122 if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) { |
|
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|
5123 // We need to treat the discovered reference lists of the |
|
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changeset
|
5124 // concurrent mark ref processor as roots and keep entries |
|
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changeset
|
5125 // (which are added by the marking threads) on them live |
|
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|
5126 // until they can be processed at the end of marking. |
|
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changeset
|
5127 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
|
3823
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changeset
|
5128 } |
|
14a2fd14c0db
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diff
changeset
|
5129 |
|
14a2fd14c0db
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diff
changeset
|
5130 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 5131 buf_scan_non_heap_roots.done(); |
|
6725
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|
5132 |
|
da91efe96a93
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changeset
|
5133 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds(); |
|
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diff
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|
5134 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
5135 g1_policy()->phase_times()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
|
3823
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|
5136 |
| 342 | 5137 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
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6611
diff
changeset
|
5138 ((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
|
3823
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johnc
parents:
3778
diff
changeset
|
5139 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5140 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 5141 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5142 // 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
|
5143 // 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
|
5144 // 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
|
5145 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5146 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
|
5147 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
|
5148 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
|
5149 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5150 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
|
5151 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5152 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
|
5153 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5154 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5155 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 5156 |
| 5157 // Now scan the complement of the collection set. | |
| 5158 if (scan_rs != NULL) { | |
| 5159 g1_rem_set()->oops_into_collection_set_do(scan_rs, worker_i); | |
| 5160 } | |
| 5161 _process_strong_tasks->all_tasks_completed(); | |
| 5162 } | |
| 5163 | |
| 5164 void | |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5165 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure) { |
|
989
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6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5166 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5167 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
| 342 | 5168 } |
| 5169 | |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5170 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5171 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5172 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5173 // 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
|
5174 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5175 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5176 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5177 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5178 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5179 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5180 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5181 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5182 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5183 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5184 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5185 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5186 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5187 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5188 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5189 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5190 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5191 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5192 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5193 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5194 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5195 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5196 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5197 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5198 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5199 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5200 void do_oop( oop* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5201 oop obj = *p; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5202 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5203 if (_g1->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5204 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5205 *p = obj->forwardee(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5206 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5207 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5208 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5209 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5210 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5211 // serial and parallel code as long as different worker |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5212 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5213 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5214 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5215 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5216 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5217 OopClosure* _copy_non_heap_obj_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5218 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5219 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5220 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5221 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5222 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5223 OopClosure* non_heap_obj_cl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5224 OopsInHeapRegionClosure* metadata_obj_cl, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5225 G1ParScanThreadState* pss): |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5226 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5227 _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
|
5228 _copy_metadata_obj_cl(metadata_obj_cl), |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5229 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5230 {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5231 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5232 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5233 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5234 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5235 template <class T> void do_oop_work(T* p) { |
|
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|
5236 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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changeset
|
5237 |
|
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changeset
|
5238 if (_g1h->obj_in_cs(obj)) { |
|
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changeset
|
5239 // If the referent object has been forwarded (either copied |
|
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changeset
|
5240 // to a new location or to itself in the event of an |
|
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changeset
|
5241 // evacuation failure) then we need to update the reference |
|
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changeset
|
5242 // field and, if both reference and referent are in the G1 |
|
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changeset
|
5243 // heap, update the RSet for the referent. |
|
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changeset
|
5244 // |
|
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changeset
|
5245 // If the referent has not been forwarded then we have to keep |
|
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changeset
|
5246 // it alive by policy. Therefore we have copy the referent. |
|
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changeset
|
5247 // |
|
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changeset
|
5248 // If the reference field is in the G1 heap then we can push |
|
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changeset
|
5249 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
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changeset
|
5250 // phase of reference processing) the object and it's followers |
|
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changeset
|
5251 // will be copied, the reference field set to point to the |
|
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|
5252 // new location, and the RSet updated. Otherwise we need to |
|
6725
da91efe96a93
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|
5253 // use the the non-heap or metadata closures directly to copy |
| 10405 | 5254 // the referent object and update the pointer, while avoiding |
|
3979
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|
5255 // updating the RSet. |
|
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changeset
|
5256 |
|
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changeset
|
5257 if (_g1h->is_in_g1_reserved(p)) { |
|
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changeset
|
5258 _par_scan_state->push_on_queue(p); |
|
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|
5259 } else { |
|
6725
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changeset
|
5260 assert(!ClassLoaderDataGraph::contains((address)p), |
|
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|
5261 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
|
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|
5262 PTR_FORMAT, p)); |
|
3979
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changeset
|
5263 _copy_non_heap_obj_cl->do_oop(p); |
|
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changeset
|
5264 } |
|
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changeset
|
5265 } |
|
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changeset
|
5266 } |
|
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changeset
|
5267 }; |
|
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changeset
|
5268 |
|
4dfb2df418f2
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changeset
|
5269 // Serial drain queue closure. Called as the 'complete_gc' |
|
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changeset
|
5270 // closure for each discovered list in some of the |
|
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changeset
|
5271 // reference processing phases. |
|
4dfb2df418f2
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changeset
|
5272 |
|
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changeset
|
5273 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
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|
5274 protected: |
|
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changeset
|
5275 G1CollectedHeap* _g1h; |
|
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|
5276 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
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changeset
|
5277 |
|
4dfb2df418f2
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changeset
|
5278 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
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changeset
|
5279 |
|
4dfb2df418f2
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diff
changeset
|
5280 public: |
|
4dfb2df418f2
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changeset
|
5281 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
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changeset
|
5282 _g1h(g1h), |
|
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changeset
|
5283 _par_scan_state(pss) |
|
4dfb2df418f2
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changeset
|
5284 { } |
|
4dfb2df418f2
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diff
changeset
|
5285 |
|
4dfb2df418f2
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diff
changeset
|
5286 void do_void() { |
|
4dfb2df418f2
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changeset
|
5287 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
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changeset
|
5288 pss->trim_queue(); |
|
4dfb2df418f2
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diff
changeset
|
5289 } |
|
4dfb2df418f2
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changeset
|
5290 }; |
|
4dfb2df418f2
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diff
changeset
|
5291 |
|
4dfb2df418f2
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diff
changeset
|
5292 // Parallel Reference Processing closures |
|
4dfb2df418f2
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diff
changeset
|
5293 |
|
4dfb2df418f2
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diff
changeset
|
5294 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
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diff
changeset
|
5295 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5296 |
|
4dfb2df418f2
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changeset
|
5297 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5298 private: |
|
4dfb2df418f2
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diff
changeset
|
5299 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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diff
changeset
|
5300 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5301 FlexibleWorkGang* _workers; |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5302 int _active_workers; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5303 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5304 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5305 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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diff
changeset
|
5306 FlexibleWorkGang* workers, |
|
3979
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diff
changeset
|
5307 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5308 int n_workers) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5309 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5310 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5311 _workers(workers), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5312 _active_workers(n_workers) |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5313 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5314 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5315 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5316 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5317 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5318 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5319 virtual void execute(EnqueueTask& task); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5320 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5321 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5322 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5323 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5324 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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diff
changeset
|
5325 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5326 ProcessTask& _proc_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5327 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5328 RefToScanQueueSet *_task_queues; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5329 ParallelTaskTerminator* _terminator; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5330 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5331 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5332 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
4dfb2df418f2
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diff
changeset
|
5333 G1CollectedHeap* g1h, |
|
4dfb2df418f2
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diff
changeset
|
5334 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
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diff
changeset
|
5335 ParallelTaskTerminator* terminator) : |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5336 AbstractGangTask("Process reference objects in parallel"), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5337 _proc_task(proc_task), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5338 _g1h(g1h), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5339 _task_queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5340 _terminator(terminator) |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5341 {} |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5342 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5343 virtual void work(uint worker_id) { |
|
3979
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diff
changeset
|
5344 // The reference processing task executed by a single worker. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5345 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5346 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5347 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5348 G1STWIsAliveClosure is_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5349 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5350 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
4dfb2df418f2
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diff
changeset
|
5351 |
|
4dfb2df418f2
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diff
changeset
|
5352 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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diff
changeset
|
5353 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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diff
changeset
|
5354 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5355 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5356 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
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diff
changeset
|
5357 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5358 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5359 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5360 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
|
5361 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
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changeset
|
5362 |
|
4dfb2df418f2
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|
5363 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
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|
5364 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
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|
5365 |
|
4dfb2df418f2
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changeset
|
5366 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
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|
5367 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
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|
5368 |
|
4dfb2df418f2
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diff
changeset
|
5369 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
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parents:
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|
5370 // We also need to mark copied objects. |
|
4dfb2df418f2
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diff
changeset
|
5371 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
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|
5372 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
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|
5373 } |
|
4dfb2df418f2
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diff
changeset
|
5374 |
|
4dfb2df418f2
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changeset
|
5375 // Keep alive closure. |
|
6725
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|
5376 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
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|
5377 |
|
4dfb2df418f2
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changeset
|
5378 // Complete GC closure |
|
4dfb2df418f2
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|
5379 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
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|
5380 |
|
4dfb2df418f2
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changeset
|
5381 // Call the reference processing task's work routine. |
|
4728
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|
5382 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
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|
5383 |
|
4dfb2df418f2
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diff
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|
5384 // Note we cannot assert that the refs array is empty here as not all |
|
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|
5385 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
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|
5386 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
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|
5387 // the queue may not be empty. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5388 } |
|
4dfb2df418f2
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changeset
|
5389 }; |
|
4dfb2df418f2
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diff
changeset
|
5390 |
|
4dfb2df418f2
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changeset
|
5391 // Driver routine for parallel reference processing. |
|
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|
5392 // Creates an instance of the ref processing gang |
|
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changeset
|
5393 // task and has the worker threads execute it. |
|
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|
5394 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
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changeset
|
5395 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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changeset
|
5396 |
|
4dfb2df418f2
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diff
changeset
|
5397 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
4dfb2df418f2
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parents:
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changeset
|
5398 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
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changeset
|
5399 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5400 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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changeset
|
5401 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
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changeset
|
5402 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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parents:
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|
5403 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5404 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5405 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5406 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5407 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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|
5408 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
4dfb2df418f2
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changeset
|
5409 EnqueueTask& _enq_task; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5410 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5411 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5412 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5413 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5414 _enq_task(enq_task) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5415 { } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5416 |
|
4728
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|
5417 virtual void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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|
5418 _enq_task.work(worker_id); |
|
3979
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parents:
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|
5419 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5420 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5421 |
| 10405 | 5422 // Driver routine for parallel reference enqueueing. |
|
3979
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parents:
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diff
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|
5423 // Creates an instance of the ref enqueueing gang |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5424 // task and has the worker threads execute it. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5425 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5426 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5427 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5428 |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5429 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5430 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5431 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5432 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5433 _g1h->set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5434 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5435 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5436 // End of weak reference support closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5437 |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5438 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5439 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5440 // objects discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5442 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5443 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5444 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 ParallelTaskTerminator _terminator; |
|
4728
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jmasa
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4711
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changeset
|
5447 uint _n_workers; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5448 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5450 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5451 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5452 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5453 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 _terminator(workers, _queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5455 _n_workers(workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5456 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5457 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5458 void work(uint worker_id) { |
|
3979
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6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5459 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5460 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5461 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5462 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5463 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5464 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5465 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5466 |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5467 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5468 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5469 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5470 |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5471 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5472 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5473 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5474 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
|
5475 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5476 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5477 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
5478 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5479 |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5480 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
5481 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5482 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5483 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5484 // We also need to mark copied objects. |
|
4dfb2df418f2
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|
5485 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
5486 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5487 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5488 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5489 // Is alive closure |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5490 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5491 |
|
4dfb2df418f2
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diff
changeset
|
5492 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
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diff
changeset
|
5493 // to be copied. |
|
6725
da91efe96a93
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6629
diff
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|
5494 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
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changeset
|
5495 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5496 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5497 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5498 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
|
5499 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
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changeset
|
5500 |
|
4dfb2df418f2
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diff
changeset
|
5501 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
|
4dfb2df418f2
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changeset
|
5502 // So this must be true - but assert just in case someone decides to |
|
4dfb2df418f2
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changeset
|
5503 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5504 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
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changeset
|
5505 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5506 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5507 // Select discovered lists [i, i+stride, i+2*stride,...,limit) |
|
4728
441e946dc1af
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jmasa
parents:
4711
diff
changeset
|
5508 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5509 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
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changeset
|
5510 |
|
4dfb2df418f2
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diff
changeset
|
5511 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5512 while (iter.has_next()) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5513 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
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diff
changeset
|
5514 // can see some null referent objects. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5515 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5516 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5517 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5518 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5519 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5520 iter.make_referent_alive(); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5521 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5522 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5523 } |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5524 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5525 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5526 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5527 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5528 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5529 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5530 assert(pss.refs()->is_empty(), "should be"); |
|
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 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5533 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5534 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5535 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5536 double ref_proc_start = os::elapsedTime(); |
|
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
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parents:
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diff
changeset
|
5538 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5539 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5540 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5541 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5542 // 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
|
5543 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5544 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5545 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5546 // 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
|
5547 // 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
|
5548 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5549 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5550 // but would not have treated the reference object as a regular oop. |
| 10405 | 5551 // 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
|
5552 // referent object. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5553 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5554 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5555 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5556 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5557 // 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
|
5558 // 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
|
5559 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5560 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5561 |
| 4711 | 5562 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5563 no_of_gc_workers == workers()->active_workers(), |
| 5564 "Need to reset active GC workers"); | |
| 5565 | |
| 5566 set_par_threads(no_of_gc_workers); | |
| 5567 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5568 no_of_gc_workers, | |
| 5569 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5570 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5571 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5572 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5573 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5574 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5575 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5576 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5577 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5578 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5579 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5580 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5581 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5582 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5583 // 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
|
5584 // 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
|
5585 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5586 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5587 // Use only a single queue for this PSS. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5588 G1ParScanThreadState pss(this, 0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5589 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5590 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5591 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5592 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5593 G1ParScanHeapEvacClosure scan_evac_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5594 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5595 G1ParScanPartialArrayClosure partial_scan_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5596 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5597 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5598 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5599 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5600 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5601 assert(pss.refs()->is_empty(), "pre-condition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5602 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5603 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
|
5604 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5605 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5606 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
|
5607 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5608 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5609 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
|
5610 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5611 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5612 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5613 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5614 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
|
5615 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5616 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5617 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5618 // Keep alive closure. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5619 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
|
5620 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5621 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5622 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5623 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5624 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5625 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5626 |
| 10405 | 5627 ReferenceProcessorStats stats; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5628 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5629 // Serial reference processing... |
| 10405 | 5630 stats = rp->process_discovered_references(&is_alive, |
| 5631 &keep_alive, | |
| 5632 &drain_queue, | |
| 5633 NULL, | |
| 5634 _gc_timer_stw); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5635 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5636 // Parallel reference processing |
| 6819 | 5637 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5638 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5639 | |
| 5640 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
| 10405 | 5641 stats = rp->process_discovered_references(&is_alive, |
| 5642 &keep_alive, | |
| 5643 &drain_queue, | |
| 5644 &par_task_executor, | |
| 5645 _gc_timer_stw); | |
| 5646 } | |
| 5647 | |
| 5648 _gc_tracer_stw->report_gc_reference_stats(stats); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5649 // We have completed copying any necessary live referent objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5650 // (that were not copied during the actual pause) so we can |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5651 // retire any active alloc buffers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5652 pss.retire_alloc_buffers(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5653 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
|
5654 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5655 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
|
5656 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
|
5657 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5658 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5659 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5660 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5661 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5662 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5663 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 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
|
5665 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5666 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5667 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5668 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5669 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5671 } else { |
| 10405 | 5672 // Parallel reference enqueueing |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5673 |
| 6819 | 5674 assert(no_of_gc_workers == workers()->active_workers(), |
| 5675 "Need to reset active workers"); | |
| 5676 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5677 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5678 | |
| 5679 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
|
5680 rp->enqueue_discovered_references(&par_task_executor); |
|
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 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5684 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5685 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5686 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5687 // 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
|
5688 // Should we do that here also? We could, but it is a serial operation |
| 10405 | 5689 // and could significantly increase the pause time. |
|
3979
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 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
|
5692 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
|
5693 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5694 |
| 10405 | 5695 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
|
5696 _expand_heap_after_alloc_failure = true; |
| 10405 | 5697 _evacuation_failed = false; |
| 342 | 5698 |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5699 // 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
|
5700 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
|
5701 |
| 342 | 5702 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
|
5703 |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5704 // Disable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5705 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
|
5706 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
|
5707 hot_card_cache->set_use_cache(false); |
| 889 | 5708 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5709 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5710 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5711 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5712 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5713 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5714 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5715 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5716 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5717 "If not dynamic should be using all the workers"); |
| 4711 | 5718 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5719 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5720 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5721 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5722 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5723 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5724 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5725 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5726 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5727 |
| 5728 init_for_evac_failure(NULL); | |
| 5729 | |
| 5730 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
|
5731 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5732 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
|
5733 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5734 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5735 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5736 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5737 StrongRootsScope srs(this); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5738 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5739 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5740 // 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
|
5741 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5742 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5743 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5744 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5745 "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
|
5746 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5747 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5748 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
|
5749 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5750 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5751 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5752 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5753 // 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
|
5754 // 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
|
5755 // 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
|
5756 // 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
|
5757 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5758 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5759 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5760 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
|
5761 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
|
5762 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5763 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5764 (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
|
5765 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
|
5766 |
| 342 | 5767 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5768 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5769 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5770 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5771 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5772 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5773 // not copied during the pause. |
| 6819 | 5774 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5775 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5776 // Weak root processing. |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5777 // Note: when JSR 292 is enabled and code blobs can contain |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5778 // non-perm oops then we will need to process the code blobs |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5779 // here too. |
| 342 | 5780 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5781 G1STWIsAliveClosure is_alive(this); |
| 342 | 5782 G1KeepAliveClosure keep_alive(this); |
| 5783 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 5784 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5785 |
| 10405 | 5786 release_gc_alloc_regions(n_workers, evacuation_info); |
| 342 | 5787 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
|
5788 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5789 // 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
|
5790 // 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
|
5791 // 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
|
5792 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
|
5793 hot_card_cache->set_use_cache(true); |
| 342 | 5794 |
| 5795 finalize_for_evac_failure(); | |
| 5796 | |
| 5797 if (evacuation_failed()) { | |
| 5798 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5799 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5800 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5801 // 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
|
5802 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5803 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 5804 } |
| 5805 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5806 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5807 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5808 // this after the card table is cleaned (and verified) as |
| 10405 | 5809 // the act of enqueueing entries on to the pending list |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5810 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5811 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5812 // RSets. |
| 6819 | 5813 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5814 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5815 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5816 RedirtyLoggedCardTableEntryFastClosure redirty; |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5817 dirty_card_queue_set().set_closure(&redirty); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5818 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
| 1111 | 5819 |
| 5820 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); | |
| 5821 dcq.merge_bufferlists(&dirty_card_queue_set()); | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5822 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5823 } |
| 342 | 5824 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5825 } | |
| 5826 | |
| 2173 | 5827 void G1CollectedHeap::free_region_if_empty(HeapRegion* hr, |
| 2152 | 5828 size_t* pre_used, |
| 5829 FreeRegionList* free_list, | |
| 4072 | 5830 OldRegionSet* old_proxy_set, |
| 2152 | 5831 HumongousRegionSet* humongous_proxy_set, |
| 2173 | 5832 HRRSCleanupTask* hrrs_cleanup_task, |
| 2152 | 5833 bool par) { |
| 5834 if (hr->used() > 0 && hr->max_live_bytes() == 0 && !hr->is_young()) { | |
| 5835 if (hr->isHumongous()) { | |
| 5836 assert(hr->startsHumongous(), "we should only see starts humongous"); | |
| 5837 free_humongous_region(hr, pre_used, free_list, humongous_proxy_set, par); | |
| 5838 } else { | |
| 4072 | 5839 _old_set.remove_with_proxy(hr, old_proxy_set); |
| 2152 | 5840 free_region(hr, pre_used, free_list, par); |
| 342 | 5841 } |
| 2173 | 5842 } else { |
| 5843 hr->rem_set()->do_cleanup_work(hrrs_cleanup_task); | |
| 342 | 5844 } |
| 5845 } | |
| 5846 | |
| 2152 | 5847 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5848 size_t* pre_used, | |
| 5849 FreeRegionList* free_list, | |
| 5850 bool par) { | |
| 5851 assert(!hr->isHumongous(), "this is only for non-humongous regions"); | |
| 5852 assert(!hr->is_empty(), "the region should not be empty"); | |
| 5853 assert(free_list != NULL, "pre-condition"); | |
| 5854 | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5855 // 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
|
5856 // 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
|
5857 // (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
|
5858 if (!hr->is_young()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5859 _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
|
5860 } |
| 2152 | 5861 *pre_used += hr->used(); |
| 5862 hr->hr_clear(par, true /* clear_space */); | |
|
2432
455328d90876
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
tonyp
parents:
2369
diff
changeset
|
5863 free_list->add_as_head(hr); |
| 2152 | 5864 } |
| 5865 | |
| 5866 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5867 size_t* pre_used, | |
| 5868 FreeRegionList* free_list, | |
| 5869 HumongousRegionSet* humongous_proxy_set, | |
| 5870 bool par) { | |
| 5871 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 5872 assert(free_list != NULL, "pre-condition"); | |
| 5873 assert(humongous_proxy_set != NULL, "pre-condition"); | |
| 5874 | |
| 5875 size_t hr_used = hr->used(); | |
| 5876 size_t hr_capacity = hr->capacity(); | |
| 5877 size_t hr_pre_used = 0; | |
| 5878 _humongous_set.remove_with_proxy(hr, humongous_proxy_set); | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5879 // 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
|
5880 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5881 uint last_index = hr->last_hc_index(); |
| 2152 | 5882 hr->set_notHumongous(); |
| 5883 free_region(hr, &hr_pre_used, free_list, par); | |
| 5884 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5885 uint i = hr->hrs_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5886 while (i < last_index) { |
| 3766 | 5887 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5888 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 5889 curr_hr->set_notHumongous(); |
| 5890 free_region(curr_hr, &hr_pre_used, free_list, par); | |
| 5891 i += 1; | |
| 5892 } | |
| 5893 assert(hr_pre_used == hr_used, | |
| 5894 err_msg("hr_pre_used: "SIZE_FORMAT" and hr_used: "SIZE_FORMAT" " | |
| 5895 "should be the same", hr_pre_used, hr_used)); | |
| 5896 *pre_used += hr_pre_used; | |
| 5897 } | |
| 5898 | |
| 5899 void G1CollectedHeap::update_sets_after_freeing_regions(size_t pre_used, | |
| 5900 FreeRegionList* free_list, | |
| 4072 | 5901 OldRegionSet* old_proxy_set, |
| 2152 | 5902 HumongousRegionSet* humongous_proxy_set, |
| 5903 bool par) { | |
| 5904 if (pre_used > 0) { | |
| 5905 Mutex* lock = (par) ? ParGCRareEvent_lock : NULL; | |
| 342 | 5906 MutexLockerEx x(lock, Mutex::_no_safepoint_check_flag); |
| 2152 | 5907 assert(_summary_bytes_used >= pre_used, |
| 5908 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" " | |
| 5909 "should be >= pre_used: "SIZE_FORMAT, | |
| 5910 _summary_bytes_used, pre_used)); | |
| 342 | 5911 _summary_bytes_used -= pre_used; |
| 2152 | 5912 } |
| 5913 if (free_list != NULL && !free_list->is_empty()) { | |
| 5914 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
2432
455328d90876
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
tonyp
parents:
2369
diff
changeset
|
5915 _free_list.add_as_head(free_list); |
| 2152 | 5916 } |
| 4072 | 5917 if (old_proxy_set != NULL && !old_proxy_set->is_empty()) { |
| 5918 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5919 _old_set.update_from_proxy(old_proxy_set); | |
| 5920 } | |
| 2152 | 5921 if (humongous_proxy_set != NULL && !humongous_proxy_set->is_empty()) { |
| 5922 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5923 _humongous_set.update_from_proxy(humongous_proxy_set); | |
| 342 | 5924 } |
| 5925 } | |
| 5926 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5927 class G1ParCleanupCTTask : public AbstractGangTask { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5928 CardTableModRefBS* _ct_bs; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5929 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5930 HeapRegion* volatile _su_head; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5931 public: |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5932 G1ParCleanupCTTask(CardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5933 G1CollectedHeap* g1h) : |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5934 AbstractGangTask("G1 Par Cleanup CT Task"), |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5935 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5936 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5937 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5938 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5939 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5940 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5941 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5942 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5943 |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5944 void clear_cards(HeapRegion* r) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5945 // 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
|
5946 if (!r->is_survivor()) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5947 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5948 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5949 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5950 }; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5951 |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5952 #ifndef PRODUCT |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5953 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
|
5954 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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|
5955 CardTableModRefBS* _ct_bs; |
|
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diff
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|
5956 public: |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
5957 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, CardTableModRefBS* ct_bs) |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
5958 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
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|
5959 virtual bool doHeapRegion(HeapRegion* r) { |
|
1394
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diff
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|
5960 if (r->is_survivor()) { |
|
3317
063382f9b575
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|
5961 _g1h->verify_dirty_region(r); |
|
940
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|
5962 } else { |
|
3317
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7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
5963 _g1h->verify_not_dirty_region(r); |
|
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|
5964 } |
|
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diff
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|
5965 return false; |
|
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|
5966 } |
|
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|
5967 }; |
|
2433
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|
5968 |
|
3317
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|
5969 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
|
063382f9b575
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|
5970 // All of the region should be clean. |
|
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|
5971 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); |
|
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|
5972 MemRegion mr(hr->bottom(), hr->end()); |
|
063382f9b575
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|
5973 ct_bs->verify_not_dirty_region(mr); |
|
063382f9b575
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|
5974 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
5975 |
|
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|
5976 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
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|
5977 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
|
063382f9b575
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|
5978 // dirty allocated blocks as they allocate them. The thread that |
|
063382f9b575
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|
5979 // retires each region and replaces it with a new one will do a |
|
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|
5980 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
|
063382f9b575
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|
5981 // not dirty that area (one less thing to have to do while holding |
|
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|
5982 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
|
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|
5983 // is dirty. |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
5984 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
|
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|
5985 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
|
063382f9b575
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|
5986 ct_bs->verify_dirty_region(mr); |
|
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|
5987 } |
|
063382f9b575
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|
5988 |
|
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|
5989 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
|
3317
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|
5990 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
|
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|
5991 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
|
3317
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|
5992 verify_dirty_region(hr); |
|
2433
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|
5993 } |
|
abdfc822206f
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|
5994 } |
|
abdfc822206f
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|
5995 |
|
abdfc822206f
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|
5996 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
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|
5997 verify_dirty_young_list(_young_list->first_region()); |
|
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|
5998 } |
|
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|
5999 #endif |
|
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|
6000 |
| 342 | 6001 void G1CollectedHeap::cleanUpCardTable() { |
| 6002 CardTableModRefBS* ct_bs = (CardTableModRefBS*) (barrier_set()); | |
| 6003 double start = os::elapsedTime(); | |
| 6004 | |
| 4023 | 6005 { |
| 6006 // Iterate over the dirty cards region list. | |
| 6007 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 6008 | |
| 4711 | 6009 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 6010 set_par_threads(); | |
| 4023 | 6011 workers()->run_task(&cleanup_task); |
| 6012 set_par_threads(0); | |
| 6013 } else { | |
| 6014 while (_dirty_cards_region_list) { | |
| 6015 HeapRegion* r = _dirty_cards_region_list; | |
| 6016 cleanup_task.clear_cards(r); | |
| 6017 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 6018 if (_dirty_cards_region_list == r) { | |
| 6019 // The last region. | |
| 6020 _dirty_cards_region_list = NULL; | |
| 6021 } | |
| 6022 r->set_next_dirty_cards_region(NULL); | |
|
796
29e7d79232b9
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diff
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|
6023 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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794
diff
changeset
|
6024 } |
| 4023 | 6025 #ifndef PRODUCT |
| 6026 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 6027 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 6028 heap_region_iterate(&cleanup_verifier); | |
| 6029 } | |
| 6030 #endif | |
|
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|
6031 } |
|
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|
6032 |
| 342 | 6033 double elapsed = os::elapsedTime() - start; |
|
6219
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|
6034 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 6035 } |
| 6036 | |
| 10405 | 6037 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
| 2152 | 6038 size_t pre_used = 0; |
| 6039 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 6040 | |
| 342 | 6041 double young_time_ms = 0.0; |
| 6042 double non_young_time_ms = 0.0; | |
| 6043 | |
|
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|
6044 // Since the collection set is a superset of the the young list, |
|
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|
6045 // all we need to do to clear the young list is clear its |
|
1316cec51b4d
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|
6046 // head and length, and unlink any young regions in the code below |
|
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|
6047 _young_list->clear(); |
|
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|
6048 |
| 342 | 6049 G1CollectorPolicy* policy = g1_policy(); |
| 6050 | |
| 6051 double start_sec = os::elapsedTime(); | |
| 6052 bool non_young = true; | |
| 6053 | |
| 6054 HeapRegion* cur = cs_head; | |
| 6055 int age_bound = -1; | |
| 6056 size_t rs_lengths = 0; | |
| 6057 | |
| 6058 while (cur != NULL) { | |
| 2361 | 6059 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 6060 if (non_young) { |
| 6061 if (cur->is_young()) { | |
| 6062 double end_sec = os::elapsedTime(); | |
| 6063 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 6064 non_young_time_ms += elapsed_ms; | |
| 6065 | |
| 6066 start_sec = os::elapsedTime(); | |
| 6067 non_young = false; | |
| 6068 } | |
| 6069 } else { | |
|
4097
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|
6070 if (!cur->is_young()) { |
|
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|
6071 double end_sec = os::elapsedTime(); |
|
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|
6072 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
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|
6073 young_time_ms += elapsed_ms; |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
6074 |
|
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changeset
|
6075 start_sec = os::elapsedTime(); |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
6076 non_young = true; |
|
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changeset
|
6077 } |
| 342 | 6078 } |
| 6079 | |
| 6080 rs_lengths += cur->rem_set()->occupied(); | |
| 6081 | |
| 6082 HeapRegion* next = cur->next_in_collection_set(); | |
| 6083 assert(cur->in_collection_set(), "bad CS"); | |
| 6084 cur->set_next_in_collection_set(NULL); | |
| 6085 cur->set_in_collection_set(false); | |
| 6086 | |
| 6087 if (cur->is_young()) { | |
| 6088 int index = cur->young_index_in_cset(); | |
|
4090
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changeset
|
6089 assert(index != -1, "invariant"); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6090 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 6091 size_t words_survived = _surviving_young_words[index]; |
| 6092 cur->record_surv_words_in_group(words_survived); | |
|
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|
6093 |
|
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changeset
|
6094 // At this point the we have 'popped' cur from the collection set |
|
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|
6095 // (linked via next_in_collection_set()) but it is still in the |
|
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|
6096 // young list (linked via next_young_region()). Clear the |
|
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|
6097 // _next_young_region field. |
|
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|
6098 cur->set_next_young_region(NULL); |
| 342 | 6099 } else { |
| 6100 int index = cur->young_index_in_cset(); | |
|
4090
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|
6101 assert(index == -1, "invariant"); |
| 342 | 6102 } |
| 6103 | |
| 6104 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 6105 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 6106 "invariant" ); | |
| 6107 | |
| 6108 if (!cur->evacuation_failed()) { | |
|
4097
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|
6109 MemRegion used_mr = cur->used_region(); |
|
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|
6110 |
| 342 | 6111 // And the region is empty. |
|
4097
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changeset
|
6112 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
| 2152 | 6113 free_region(cur, &pre_used, &local_free_list, false /* par */); |
| 342 | 6114 } else { |
| 6115 cur->uninstall_surv_rate_group(); | |
|
4090
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changeset
|
6116 if (cur->is_young()) { |
| 342 | 6117 cur->set_young_index_in_cset(-1); |
|
4090
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diff
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|
6118 } |
| 342 | 6119 cur->set_not_young(); |
| 6120 cur->set_evacuation_failed(false); | |
| 4072 | 6121 // The region is now considered to be old. |
| 6122 _old_set.add(cur); | |
| 10405 | 6123 evacuation_info.increment_collectionset_used_after(cur->used()); |
| 342 | 6124 } |
| 6125 cur = next; | |
| 6126 } | |
| 6127 | |
| 10405 | 6128 evacuation_info.set_regions_freed(local_free_list.length()); |
| 342 | 6129 policy->record_max_rs_lengths(rs_lengths); |
| 6130 policy->cset_regions_freed(); | |
| 6131 | |
| 6132 double end_sec = os::elapsedTime(); | |
| 6133 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
4097
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|
6134 |
|
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changeset
|
6135 if (non_young) { |
| 342 | 6136 non_young_time_ms += elapsed_ms; |
|
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|
6137 } else { |
| 342 | 6138 young_time_ms += elapsed_ms; |
|
4097
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diff
changeset
|
6139 } |
| 342 | 6140 |
| 2152 | 6141 update_sets_after_freeing_regions(pre_used, &local_free_list, |
| 4072 | 6142 NULL /* old_proxy_set */, |
| 2152 | 6143 NULL /* humongous_proxy_set */, |
| 6144 false /* par */); | |
|
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
|
6145 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
|
922993931b3d
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6188
diff
changeset
|
6146 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6147 } |
| 6148 | |
|
1394
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changeset
|
6149 // This routine is similar to the above but does not record |
|
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|
6150 // any policy statistics or update free lists; we are abandoning |
|
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|
6151 // the current incremental collection set in preparation of a |
|
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6152 // full collection. After the full GC we will start to build up |
|
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|
6153 // the incremental collection set again. |
|
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6154 // This is only called when we're doing a full collection |
|
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6155 // and is immediately followed by the tearing down of the young list. |
|
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|
6156 |
|
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|
6157 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
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|
6158 HeapRegion* cur = cs_head; |
|
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|
6159 |
|
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|
6160 while (cur != NULL) { |
|
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|
6161 HeapRegion* next = cur->next_in_collection_set(); |
|
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|
6162 assert(cur->in_collection_set(), "bad CS"); |
|
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|
6163 cur->set_next_in_collection_set(NULL); |
|
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|
6164 cur->set_in_collection_set(false); |
|
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|
6165 cur->set_young_index_in_cset(-1); |
|
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|
6166 cur = next; |
|
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|
6167 } |
|
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|
6168 } |
|
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|
6169 |
| 2152 | 6170 void G1CollectedHeap::set_free_regions_coming() { |
| 6171 if (G1ConcRegionFreeingVerbose) { | |
| 6172 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6173 "setting free regions coming"); | |
| 6174 } | |
| 6175 | |
| 6176 assert(!free_regions_coming(), "pre-condition"); | |
| 6177 _free_regions_coming = true; | |
| 342 | 6178 } |
| 6179 | |
| 2152 | 6180 void G1CollectedHeap::reset_free_regions_coming() { |
|
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6181 assert(free_regions_coming(), "pre-condition"); |
|
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6182 |
| 2152 | 6183 { |
| 6184 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6185 _free_regions_coming = false; | |
| 6186 SecondaryFreeList_lock->notify_all(); | |
| 6187 } | |
| 6188 | |
| 6189 if (G1ConcRegionFreeingVerbose) { | |
| 6190 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6191 "reset free regions coming"); | |
| 342 | 6192 } |
| 6193 } | |
| 6194 | |
| 2152 | 6195 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6196 // Most of the time we won't have to wait, so let's do a quick test | |
| 6197 // first before we take the lock. | |
| 6198 if (!free_regions_coming()) { | |
| 6199 return; | |
| 6200 } | |
| 6201 | |
| 6202 if (G1ConcRegionFreeingVerbose) { | |
| 6203 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6204 "waiting for free regions"); | |
| 342 | 6205 } |
| 6206 | |
| 6207 { | |
| 2152 | 6208 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6209 while (free_regions_coming()) { | |
| 6210 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6211 } |
| 2152 | 6212 } |
| 6213 | |
| 6214 if (G1ConcRegionFreeingVerbose) { | |
| 6215 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6216 "done waiting for free regions"); | |
| 6217 } | |
| 342 | 6218 } |
| 6219 | |
| 6220 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6221 assert(heap_lock_held_for_gc(), | |
| 6222 "the heap lock should already be held by or for this thread"); | |
| 6223 _young_list->push_region(hr); | |
| 6224 } | |
| 6225 | |
| 6226 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6227 private: | |
| 6228 bool _success; | |
| 6229 public: | |
| 6230 NoYoungRegionsClosure() : _success(true) { } | |
| 6231 bool doHeapRegion(HeapRegion* r) { | |
| 6232 if (r->is_young()) { | |
| 6233 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6234 r->bottom(), r->end()); | |
| 6235 _success = false; | |
| 6236 } | |
| 6237 return false; | |
| 6238 } | |
| 6239 bool success() { return _success; } | |
| 6240 }; | |
| 6241 | |
|
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6242 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
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|
6243 bool ret = _young_list->check_list_empty(check_sample); |
|
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|
6244 |
|
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|
6245 if (check_heap) { |
| 342 | 6246 NoYoungRegionsClosure closure; |
| 6247 heap_region_iterate(&closure); | |
| 6248 ret = ret && closure.success(); | |
| 6249 } | |
| 6250 | |
| 6251 return ret; | |
| 6252 } | |
| 6253 | |
| 4072 | 6254 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6255 private: | |
| 6256 OldRegionSet *_old_set; | |
| 2152 | 6257 |
| 342 | 6258 public: |
| 4072 | 6259 TearDownRegionSetsClosure(OldRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6260 |
| 342 | 6261 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6262 if (r->is_empty()) { |
| 6263 // We ignore empty regions, we'll empty the free list afterwards | |
| 6264 } else if (r->is_young()) { | |
| 6265 // We ignore young regions, we'll empty the young list afterwards | |
| 6266 } else if (r->isHumongous()) { | |
| 6267 // We ignore humongous regions, we're not tearing down the | |
| 6268 // humongous region set | |
| 342 | 6269 } else { |
| 4072 | 6270 // The rest should be old |
| 6271 _old_set->remove(r); | |
| 342 | 6272 } |
| 6273 return false; | |
| 6274 } | |
| 6275 | |
| 4072 | 6276 ~TearDownRegionSetsClosure() { |
| 6277 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6278 } |
| 342 | 6279 }; |
| 6280 | |
| 4072 | 6281 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6282 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6283 | |
| 6284 if (!free_list_only) { | |
| 6285 TearDownRegionSetsClosure cl(&_old_set); | |
| 6286 heap_region_iterate(&cl); | |
| 6287 | |
| 6288 // Need to do this after the heap iteration to be able to | |
| 6289 // recognize the young regions and ignore them during the iteration. | |
| 6290 _young_list->empty_list(); | |
| 6291 } | |
| 6292 _free_list.remove_all(); | |
| 6293 } | |
| 6294 | |
| 6295 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6296 private: | |
| 6297 bool _free_list_only; | |
| 6298 OldRegionSet* _old_set; | |
| 6299 FreeRegionList* _free_list; | |
| 6300 size_t _total_used; | |
| 6301 | |
| 6302 public: | |
| 6303 RebuildRegionSetsClosure(bool free_list_only, | |
| 6304 OldRegionSet* old_set, FreeRegionList* free_list) : | |
| 6305 _free_list_only(free_list_only), | |
| 6306 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 6307 assert(_free_list->is_empty(), "pre-condition"); | |
| 6308 if (!free_list_only) { | |
| 6309 assert(_old_set->is_empty(), "pre-condition"); | |
| 6310 } | |
| 6311 } | |
| 6312 | |
| 6313 bool doHeapRegion(HeapRegion* r) { | |
| 6314 if (r->continuesHumongous()) { | |
| 6315 return false; | |
| 6316 } | |
| 6317 | |
| 6318 if (r->is_empty()) { | |
| 6319 // Add free regions to the free list | |
| 6320 _free_list->add_as_tail(r); | |
| 6321 } else if (!_free_list_only) { | |
| 6322 assert(!r->is_young(), "we should not come across young regions"); | |
| 6323 | |
| 6324 if (r->isHumongous()) { | |
| 6325 // We ignore humongous regions, we left the humongous set unchanged | |
| 6326 } else { | |
| 6327 // The rest should be old, add them to the old set | |
| 6328 _old_set->add(r); | |
| 6329 } | |
| 6330 _total_used += r->used(); | |
| 6331 } | |
| 6332 | |
| 6333 return false; | |
| 6334 } | |
| 6335 | |
| 6336 size_t total_used() { | |
| 6337 return _total_used; | |
| 6338 } | |
| 6339 }; | |
| 6340 | |
| 6341 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6342 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6343 | |
| 6344 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); | |
| 6345 heap_region_iterate(&cl); | |
| 6346 | |
| 6347 if (!free_list_only) { | |
| 6348 _summary_bytes_used = cl.total_used(); | |
| 6349 } | |
| 6350 assert(_summary_bytes_used == recalculate_used(), | |
| 6351 err_msg("inconsistent _summary_bytes_used, " | |
| 6352 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 6353 _summary_bytes_used, recalculate_used())); | |
| 342 | 6354 } |
| 6355 | |
| 6356 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6357 _refine_cte_cl->set_concurrent(concurrent); | |
| 6358 } | |
| 6359 | |
| 6360 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6361 HeapRegion* hr = heap_region_containing(p); | |
| 6362 if (hr == NULL) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
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|
6363 return false; |
| 342 | 6364 } else { |
| 6365 return hr->is_in(p); | |
| 6366 } | |
| 6367 } | |
| 2152 | 6368 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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diff
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|
6369 // Methods for the mutator alloc region |
|
f44782f04dd4
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|
6370 |
|
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|
6371 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
|
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diff
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|
6372 bool force) { |
|
abdfc822206f
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diff
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|
6373 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
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|
6374 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
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diff
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|
6375 "if force is true we should be able to expand the young list"); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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|
6376 bool young_list_full = g1_policy()->is_young_list_full(); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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|
6377 if (force || !young_list_full) { |
|
2433
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diff
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|
6378 HeapRegion* new_alloc_region = new_region(word_size, |
|
abdfc822206f
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diff
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|
6379 false /* do_expand */); |
|
abdfc822206f
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|
6380 if (new_alloc_region != NULL) { |
|
abdfc822206f
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diff
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|
6381 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
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|
6382 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6383 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6384 } |
|
abdfc822206f
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2432
diff
changeset
|
6385 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6386 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
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|
6387 } |
|
abdfc822206f
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diff
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|
6388 |
|
abdfc822206f
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diff
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|
6389 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
|
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|
6390 size_t allocated_bytes) { |
|
abdfc822206f
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diff
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|
6391 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
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diff
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|
6392 assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
|
abdfc822206f
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|
6393 |
|
abdfc822206f
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|
6394 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
|
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|
6395 _summary_bytes_used += allocated_bytes; |
|
3778
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3777
diff
changeset
|
6396 _hr_printer.retire(alloc_region); |
|
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8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
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3979
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|
6397 // We update the eden sizes here, when the region is retired, |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
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|
6398 // instead of when it's allocated, since this is the point that its |
|
8229bd737950
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|
6399 // used space has been recored in _summary_bytes_used. |
|
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|
6400 g1mm()->update_eden_size(); |
|
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|
6401 } |
|
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|
6402 |
|
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|
6403 HeapRegion* MutatorAllocRegion::allocate_new_region(size_t word_size, |
|
abdfc822206f
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|
6404 bool force) { |
|
abdfc822206f
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diff
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|
6405 return _g1h->new_mutator_alloc_region(word_size, force); |
|
abdfc822206f
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|
6406 } |
|
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|
6407 |
|
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bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
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|
6408 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
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|
6409 // Don't change the number of workers. Use the value previously set |
|
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|
6410 // in the workgroup. |
| 4711 | 6411 assert(G1CollectedHeap::use_parallel_gc_threads(), "shouldn't be here otherwise"); |
|
4728
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7121618: Change type of number of GC workers to unsigned int.
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4711
diff
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|
6412 uint n_workers = workers()->active_workers(); |
| 4711 | 6413 assert(UseDynamicNumberOfGCThreads || |
|
4095
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|
6414 n_workers == workers()->total_workers(), |
|
bca17e38de00
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|
6415 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
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|
6416 if (n_workers == 0) { |
|
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|
6417 assert(false, "Should have been set in prior evacuation pause."); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
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|
6418 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
6419 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
6420 } |
|
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|
6421 set_par_threads(n_workers); |
|
bca17e38de00
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|
6422 } |
|
bca17e38de00
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|
6423 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6424 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
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|
6425 size_t allocated_bytes) { |
|
abdfc822206f
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|
6426 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
|
abdfc822206f
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|
6427 } |
|
abdfc822206f
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|
6428 |
|
3830
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|
6429 // Methods for the GC alloc regions |
|
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|
6430 |
|
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|
6431 HeapRegion* G1CollectedHeap::new_gc_alloc_region(size_t word_size, |
|
6010
720b6a76dd9d
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|
6432 uint count, |
|
3830
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|
6433 GCAllocPurpose ap) { |
|
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|
6434 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
|
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|
6435 |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6436 if (count < g1_policy()->max_regions(ap)) { |
|
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|
6437 HeapRegion* new_alloc_region = new_region(word_size, |
|
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|
6438 true /* do_expand */); |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6439 if (new_alloc_region != NULL) { |
|
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|
6440 // We really only need to do this for old regions given that we |
|
f44782f04dd4
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|
6441 // should never scan survivors. But it doesn't hurt to do it |
|
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|
6442 // for survivors too. |
|
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|
6443 new_alloc_region->set_saved_mark(); |
|
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|
6444 if (ap == GCAllocForSurvived) { |
|
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|
6445 new_alloc_region->set_survivor(); |
|
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|
6446 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
|
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|
6447 } else { |
|
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|
6448 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
|
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|
6449 } |
|
4787
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|
6450 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
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|
6451 new_alloc_region->note_start_of_copying(during_im); |
|
3830
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|
6452 return new_alloc_region; |
|
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|
6453 } else { |
|
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|
6454 g1_policy()->note_alloc_region_limit_reached(ap); |
|
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|
6455 } |
|
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|
6456 } |
|
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|
6457 return NULL; |
|
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|
6458 } |
|
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|
6459 |
|
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|
6460 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
|
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|
6461 size_t allocated_bytes, |
|
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|
6462 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
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diff
changeset
|
6463 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
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diff
changeset
|
6464 alloc_region->note_end_of_copying(during_im); |
|
3830
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|
6465 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
|
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|
6466 if (ap == GCAllocForSurvived) { |
|
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changeset
|
6467 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6468 } else { |
| 6469 _old_set.add(alloc_region); | |
|
3830
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|
6470 } |
|
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changeset
|
6471 _hr_printer.retire(alloc_region); |
|
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|
6472 } |
|
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diff
changeset
|
6473 |
|
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changeset
|
6474 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
|
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|
6475 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6476 assert(!force, "not supported for GC alloc regions"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
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diff
changeset
|
6477 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
6478 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6479 |
|
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parents:
3824
diff
changeset
|
6480 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6481 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6482 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
6483 GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
6484 } |
|
f44782f04dd4
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3824
diff
changeset
|
6485 |
|
f44782f04dd4
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3824
diff
changeset
|
6486 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
|
f44782f04dd4
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|
6487 bool force) { |
|
f44782f04dd4
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diff
changeset
|
6488 assert(!force, "not supported for GC alloc regions"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6489 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
|
f44782f04dd4
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diff
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|
6490 } |
|
f44782f04dd4
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3824
diff
changeset
|
6491 |
|
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diff
changeset
|
6492 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
f44782f04dd4
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|
6493 size_t allocated_bytes) { |
|
f44782f04dd4
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diff
changeset
|
6494 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
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|
6495 GCAllocForTenured); |
|
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diff
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|
6496 } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6497 // Heap region set verification |
|
abdfc822206f
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changeset
|
6498 |
| 2152 | 6499 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6500 private: | |
| 4072 | 6501 FreeRegionList* _free_list; |
| 6502 OldRegionSet* _old_set; | |
| 2152 | 6503 HumongousRegionSet* _humongous_set; |
|
6010
720b6a76dd9d
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6008
diff
changeset
|
6504 uint _region_count; |
| 2152 | 6505 |
| 6506 public: | |
| 4072 | 6507 VerifyRegionListsClosure(OldRegionSet* old_set, |
| 6508 HumongousRegionSet* humongous_set, | |
| 2152 | 6509 FreeRegionList* free_list) : |
| 4072 | 6510 _old_set(old_set), _humongous_set(humongous_set), |
| 6511 _free_list(free_list), _region_count(0) { } | |
| 2152 | 6512 |
|
6010
720b6a76dd9d
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6008
diff
changeset
|
6513 uint region_count() { return _region_count; } |
| 2152 | 6514 |
| 6515 bool doHeapRegion(HeapRegion* hr) { | |
| 6516 _region_count += 1; | |
| 6517 | |
| 6518 if (hr->continuesHumongous()) { | |
| 6519 return false; | |
| 6520 } | |
| 6521 | |
| 6522 if (hr->is_young()) { | |
| 6523 // TODO | |
| 6524 } else if (hr->startsHumongous()) { | |
| 6525 _humongous_set->verify_next_region(hr); | |
| 6526 } else if (hr->is_empty()) { | |
| 6527 _free_list->verify_next_region(hr); | |
| 4072 | 6528 } else { |
| 6529 _old_set->verify_next_region(hr); | |
| 2152 | 6530 } |
| 6531 return false; | |
| 6532 } | |
| 6533 }; | |
| 6534 | |
|
6010
720b6a76dd9d
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6008
diff
changeset
|
6535 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
| 3766 | 6536 HeapWord* bottom) { |
| 6537 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6538 MemRegion mr(bottom, end); | |
| 6539 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6540 // 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
|
6541 return new HeapRegion(hrs_index, _bot_shared, mr); |
| 3766 | 6542 } |
| 6543 | |
| 2152 | 6544 void G1CollectedHeap::verify_region_sets() { |
| 6545 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6546 | |
| 6547 // First, check the explicit lists. | |
| 6548 _free_list.verify(); | |
| 6549 { | |
| 6550 // Given that a concurrent operation might be adding regions to | |
| 6551 // the secondary free list we have to take the lock before | |
| 6552 // verifying it. | |
| 6553 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6554 _secondary_free_list.verify(); | |
| 6555 } | |
| 4072 | 6556 _old_set.verify(); |
| 2152 | 6557 _humongous_set.verify(); |
| 6558 | |
| 6559 // If a concurrent region freeing operation is in progress it will | |
| 6560 // be difficult to correctly attributed any free regions we come | |
| 6561 // across to the correct free list given that they might belong to | |
| 6562 // one of several (free_list, secondary_free_list, any local lists, | |
| 6563 // etc.). So, if that's the case we will skip the rest of the | |
| 6564 // verification operation. Alternatively, waiting for the concurrent | |
| 6565 // operation to complete will have a non-trivial effect on the GC's | |
| 6566 // operation (no concurrent operation will last longer than the | |
| 6567 // interval between two calls to verification) and it might hide | |
| 6568 // any issues that we would like to catch during testing. | |
| 6569 if (free_regions_coming()) { | |
| 6570 return; | |
| 6571 } | |
| 6572 | |
| 2361 | 6573 // Make sure we append the secondary_free_list on the free_list so |
| 6574 // that all free regions we will come across can be safely | |
| 6575 // attributed to the free_list. | |
| 6576 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6577 |
| 6578 // Finally, make sure that the region accounting in the lists is | |
| 6579 // consistent with what we see in the heap. | |
| 4072 | 6580 _old_set.verify_start(); |
| 2152 | 6581 _humongous_set.verify_start(); |
| 6582 _free_list.verify_start(); | |
| 6583 | |
| 4072 | 6584 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6585 heap_region_iterate(&cl); |
| 6586 | |
| 4072 | 6587 _old_set.verify_end(); |
| 2152 | 6588 _humongous_set.verify_end(); |
| 6589 _free_list.verify_end(); | |
| 342 | 6590 } |