Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 4910:caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
Summary: If we try to schedule an initial-mark GC in order to explicit start a conc mark cycle and it gets pre-empted by antoher GC, we should retry the attempt as long as it's appropriate for the GC cause.
Reviewed-by: brutisso, johnc
| author | tonyp |
|---|---|
| date | Tue, 14 Feb 2012 08:21:08 -0500 |
| parents | 379b22e03c32 |
| children | a9647476d1a4 |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2012, 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" |
| 1972 | 36 #include "gc_implementation/g1/g1MarkSweep.hpp" |
| 37 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
| 38 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
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39 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 40 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
| 41 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 42 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
| 43 #include "gc_implementation/shared/isGCActiveMark.hpp" | |
| 44 #include "memory/gcLocker.inline.hpp" | |
| 45 #include "memory/genOopClosures.inline.hpp" | |
| 46 #include "memory/generationSpec.hpp" | |
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47 #include "memory/referenceProcessor.hpp" |
| 1972 | 48 #include "oops/oop.inline.hpp" |
| 49 #include "oops/oop.pcgc.inline.hpp" | |
| 50 #include "runtime/aprofiler.hpp" | |
| 51 #include "runtime/vmThread.hpp" | |
| 342 | 52 |
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53 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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54 |
| 342 | 55 // turn it on so that the contents of the young list (scan-only / |
| 56 // to-be-collected) are printed at "strategic" points before / during | |
| 57 // / after the collection --- this is useful for debugging | |
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58 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 59 // CURRENT STATUS |
| 60 // This file is under construction. Search for "FIXME". | |
| 61 | |
| 62 // INVARIANTS/NOTES | |
| 63 // | |
| 64 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 65 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 66 // and allocate_new_tlab, which are the "entry" points to the | |
| 67 // allocation code from the rest of the JVM. (Note that this does not | |
| 68 // apply to TLAB allocation, which is not part of this interface: it | |
| 69 // is done by clients of this interface.) | |
| 342 | 70 |
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71 // Notes on implementation of parallelism in different tasks. |
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72 // |
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73 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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74 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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75 // It does use run_task() which sets _n_workers in the task. |
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76 // G1ParTask executes g1_process_strong_roots() -> |
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77 // SharedHeap::process_strong_roots() which calls eventuall to |
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78 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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79 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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80 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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81 // |
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82 |
| 342 | 83 // Local to this file. |
| 84 | |
| 85 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 86 SuspendibleThreadSet* _sts; | |
| 87 G1RemSet* _g1rs; | |
| 88 ConcurrentG1Refine* _cg1r; | |
| 89 bool _concurrent; | |
| 90 public: | |
| 91 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
| 92 G1RemSet* g1rs, | |
| 93 ConcurrentG1Refine* cg1r) : | |
| 94 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
| 95 {} | |
| 96 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 1705 | 97 bool oops_into_cset = _g1rs->concurrentRefineOneCard(card_ptr, worker_i, false); |
| 98 // This path is executed by the concurrent refine or mutator threads, | |
| 99 // concurrently, and so we do not care if card_ptr contains references | |
| 100 // that point into the collection set. | |
| 101 assert(!oops_into_cset, "should be"); | |
| 102 | |
| 342 | 103 if (_concurrent && _sts->should_yield()) { |
| 104 // Caller will actually yield. | |
| 105 return false; | |
| 106 } | |
| 107 // Otherwise, we finished successfully; return true. | |
| 108 return true; | |
| 109 } | |
| 110 void set_concurrent(bool b) { _concurrent = b; } | |
| 111 }; | |
| 112 | |
| 113 | |
| 114 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 115 int _calls; | |
| 116 G1CollectedHeap* _g1h; | |
| 117 CardTableModRefBS* _ctbs; | |
| 118 int _histo[256]; | |
| 119 public: | |
| 120 ClearLoggedCardTableEntryClosure() : | |
| 121 _calls(0) | |
| 122 { | |
| 123 _g1h = G1CollectedHeap::heap(); | |
| 124 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
| 125 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 126 } | |
| 127 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 128 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 129 _calls++; | |
| 130 unsigned char* ujb = (unsigned char*)card_ptr; | |
| 131 int ind = (int)(*ujb); | |
| 132 _histo[ind]++; | |
| 133 *card_ptr = -1; | |
| 134 } | |
| 135 return true; | |
| 136 } | |
| 137 int calls() { return _calls; } | |
| 138 void print_histo() { | |
| 139 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 140 for (int i = 0; i < 256; i++) { | |
| 141 if (_histo[i] != 0) { | |
| 142 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 143 } | |
| 144 } | |
| 145 } | |
| 146 }; | |
| 147 | |
| 148 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 149 int _calls; | |
| 150 G1CollectedHeap* _g1h; | |
| 151 CardTableModRefBS* _ctbs; | |
| 152 public: | |
| 153 RedirtyLoggedCardTableEntryClosure() : | |
| 154 _calls(0) | |
| 155 { | |
| 156 _g1h = G1CollectedHeap::heap(); | |
| 157 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
| 158 } | |
| 159 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 160 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 161 _calls++; | |
| 162 *card_ptr = 0; | |
| 163 } | |
| 164 return true; | |
| 165 } | |
| 166 int calls() { return _calls; } | |
| 167 }; | |
| 168 | |
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169 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
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170 public: |
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171 bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
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172 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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173 return true; |
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174 } |
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175 }; |
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176 |
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177 YoungList::YoungList(G1CollectedHeap* g1h) : |
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178 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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179 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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180 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 181 } |
| 182 | |
| 183 void YoungList::push_region(HeapRegion *hr) { | |
| 184 assert(!hr->is_young(), "should not already be young"); | |
| 185 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 186 | |
| 187 hr->set_next_young_region(_head); | |
| 188 _head = hr; | |
| 189 | |
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190 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 191 ++_length; |
| 192 } | |
| 193 | |
| 194 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 195 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 196 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 197 | |
| 198 hr->set_next_young_region(_survivor_head); | |
| 199 if (_survivor_head == NULL) { | |
| 545 | 200 _survivor_tail = hr; |
| 342 | 201 } |
| 202 _survivor_head = hr; | |
| 203 ++_survivor_length; | |
| 204 } | |
| 205 | |
| 206 void YoungList::empty_list(HeapRegion* list) { | |
| 207 while (list != NULL) { | |
| 208 HeapRegion* next = list->get_next_young_region(); | |
| 209 list->set_next_young_region(NULL); | |
| 210 list->uninstall_surv_rate_group(); | |
| 211 list->set_not_young(); | |
| 212 list = next; | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 void YoungList::empty_list() { | |
| 217 assert(check_list_well_formed(), "young list should be well formed"); | |
| 218 | |
| 219 empty_list(_head); | |
| 220 _head = NULL; | |
| 221 _length = 0; | |
| 222 | |
| 223 empty_list(_survivor_head); | |
| 224 _survivor_head = NULL; | |
| 545 | 225 _survivor_tail = NULL; |
| 342 | 226 _survivor_length = 0; |
| 227 | |
| 228 _last_sampled_rs_lengths = 0; | |
| 229 | |
| 230 assert(check_list_empty(false), "just making sure..."); | |
| 231 } | |
| 232 | |
| 233 bool YoungList::check_list_well_formed() { | |
| 234 bool ret = true; | |
| 235 | |
| 236 size_t length = 0; | |
| 237 HeapRegion* curr = _head; | |
| 238 HeapRegion* last = NULL; | |
| 239 while (curr != NULL) { | |
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240 if (!curr->is_young()) { |
| 342 | 241 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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242 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 243 curr->bottom(), curr->end(), |
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244 curr->is_young(), curr->is_survivor()); |
| 342 | 245 ret = false; |
| 246 } | |
| 247 ++length; | |
| 248 last = curr; | |
| 249 curr = curr->get_next_young_region(); | |
| 250 } | |
| 251 ret = ret && (length == _length); | |
| 252 | |
| 253 if (!ret) { | |
| 254 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
| 255 gclog_or_tty->print_cr("### list has %d entries, _length is %d", | |
| 256 length, _length); | |
| 257 } | |
| 258 | |
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259 return ret; |
| 342 | 260 } |
| 261 | |
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262 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 263 bool ret = true; |
| 264 | |
| 265 if (_length != 0) { | |
| 266 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %d", | |
| 267 _length); | |
| 268 ret = false; | |
| 269 } | |
| 270 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 271 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 272 ret = false; | |
| 273 } | |
| 274 if (_head != NULL) { | |
| 275 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 276 ret = false; | |
| 277 } | |
| 278 if (!ret) { | |
| 279 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 280 } | |
| 281 | |
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282 return ret; |
| 342 | 283 } |
| 284 | |
| 285 void | |
| 286 YoungList::rs_length_sampling_init() { | |
| 287 _sampled_rs_lengths = 0; | |
| 288 _curr = _head; | |
| 289 } | |
| 290 | |
| 291 bool | |
| 292 YoungList::rs_length_sampling_more() { | |
| 293 return _curr != NULL; | |
| 294 } | |
| 295 | |
| 296 void | |
| 297 YoungList::rs_length_sampling_next() { | |
| 298 assert( _curr != NULL, "invariant" ); | |
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299 size_t rs_length = _curr->rem_set()->occupied(); |
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300 |
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301 _sampled_rs_lengths += rs_length; |
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302 |
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303 // The current region may not yet have been added to the |
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304 // incremental collection set (it gets added when it is |
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305 // retired as the current allocation region). |
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306 if (_curr->in_collection_set()) { |
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307 // Update the collection set policy information for this region |
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308 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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309 } |
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310 |
| 342 | 311 _curr = _curr->get_next_young_region(); |
| 312 if (_curr == NULL) { | |
| 313 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 314 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 void | |
| 319 YoungList::reset_auxilary_lists() { | |
| 320 guarantee( is_empty(), "young list should be empty" ); | |
| 321 assert(check_list_well_formed(), "young list should be well formed"); | |
| 322 | |
| 323 // Add survivor regions to SurvRateGroup. | |
| 324 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 325 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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326 |
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327 int young_index_in_cset = 0; |
| 342 | 328 for (HeapRegion* curr = _survivor_head; |
| 329 curr != NULL; | |
| 330 curr = curr->get_next_young_region()) { | |
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331 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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332 |
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333 // The region is a non-empty survivor so let's add it to |
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334 // the incremental collection set for the next evacuation |
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335 // pause. |
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336 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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337 young_index_in_cset += 1; |
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338 } |
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339 assert((size_t) young_index_in_cset == _survivor_length, |
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340 "post-condition"); |
| 342 | 341 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 342 | |
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343 _head = _survivor_head; |
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344 _length = _survivor_length; |
| 342 | 345 if (_survivor_head != NULL) { |
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346 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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347 assert(_survivor_length > 0, "invariant"); |
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348 _survivor_tail->set_next_young_region(NULL); |
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349 } |
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350 |
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351 // Don't clear the survivor list handles until the start of |
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352 // the next evacuation pause - we need it in order to re-tag |
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353 // the survivor regions from this evacuation pause as 'young' |
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354 // at the start of the next. |
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355 |
| 545 | 356 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 357 |
| 358 assert(check_list_well_formed(), "young list should be well formed"); | |
| 359 } | |
| 360 | |
| 361 void YoungList::print() { | |
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362 HeapRegion* lists[] = {_head, _survivor_head}; |
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363 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 364 |
| 365 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 366 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 367 HeapRegion *curr = lists[list]; | |
| 368 if (curr == NULL) | |
| 369 gclog_or_tty->print_cr(" empty"); | |
| 370 while (curr != NULL) { | |
| 371 gclog_or_tty->print_cr(" [%08x-%08x], t: %08x, P: %08x, N: %08x, C: %08x, " | |
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372 "age: %4d, y: %d, surv: %d", |
| 342 | 373 curr->bottom(), curr->end(), |
| 374 curr->top(), | |
| 375 curr->prev_top_at_mark_start(), | |
| 376 curr->next_top_at_mark_start(), | |
| 377 curr->top_at_conc_mark_count(), | |
| 378 curr->age_in_surv_rate_group_cond(), | |
| 379 curr->is_young(), | |
| 380 curr->is_survivor()); | |
| 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 |
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464 // can move in an incremental collecction. |
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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 // perm gen (or null) |
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471 return false; |
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472 } else { |
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473 return !hr->isHumongous(); |
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474 } |
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475 } |
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476 |
| 342 | 477 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 478 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 479 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); | |
| 480 | |
| 481 // Count the dirty cards at the start. | |
| 482 CountNonCleanMemRegionClosure count1(this); | |
| 483 ct_bs->mod_card_iterate(&count1); | |
| 484 int orig_count = count1.n(); | |
| 485 | |
| 486 // First clear the logged cards. | |
| 487 ClearLoggedCardTableEntryClosure clear; | |
| 488 dcqs.set_closure(&clear); | |
| 489 dcqs.apply_closure_to_all_completed_buffers(); | |
| 490 dcqs.iterate_closure_all_threads(false); | |
| 491 clear.print_histo(); | |
| 492 | |
| 493 // Now ensure that there's no dirty cards. | |
| 494 CountNonCleanMemRegionClosure count2(this); | |
| 495 ct_bs->mod_card_iterate(&count2); | |
| 496 if (count2.n() != 0) { | |
| 497 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 498 count2.n(), orig_count); | |
| 499 } | |
| 500 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 501 | |
| 502 RedirtyLoggedCardTableEntryClosure redirty; | |
| 503 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
| 504 dcqs.apply_closure_to_all_completed_buffers(); | |
| 505 dcqs.iterate_closure_all_threads(false); | |
| 506 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
| 507 clear.calls(), orig_count); | |
| 508 guarantee(redirty.calls() == clear.calls(), | |
| 509 "Or else mechanism is broken."); | |
| 510 | |
| 511 CountNonCleanMemRegionClosure count3(this); | |
| 512 ct_bs->mod_card_iterate(&count3); | |
| 513 if (count3.n() != orig_count) { | |
| 514 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 515 orig_count, count3.n()); | |
| 516 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 517 } | |
| 518 | |
| 519 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 520 } | |
| 521 | |
| 522 // Private class members. | |
| 523 | |
| 524 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 525 | |
| 526 // Private methods. | |
| 527 | |
| 2152 | 528 HeapRegion* |
| 2361 | 529 G1CollectedHeap::new_region_try_secondary_free_list() { |
| 2152 | 530 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 531 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 532 if (!_secondary_free_list.is_empty()) { | |
| 533 if (G1ConcRegionFreeingVerbose) { | |
| 534 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 535 "secondary_free_list has "SIZE_FORMAT" entries", | |
| 536 _secondary_free_list.length()); | |
| 537 } | |
| 538 // It looks as if there are free regions available on the | |
| 539 // secondary_free_list. Let's move them to the free_list and try | |
| 540 // again to allocate from it. | |
| 541 append_secondary_free_list(); | |
| 542 | |
| 543 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
| 544 "empty we should have moved at least one entry to the free_list"); | |
| 545 HeapRegion* res = _free_list.remove_head(); | |
| 546 if (G1ConcRegionFreeingVerbose) { | |
| 547 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 548 "allocated "HR_FORMAT" from secondary_free_list", | |
| 549 HR_FORMAT_PARAMS(res)); | |
| 550 } | |
| 551 return res; | |
| 552 } | |
| 553 | |
| 554 // Wait here until we get notifed either when (a) there are no | |
| 555 // more free regions coming or (b) some regions have been moved on | |
| 556 // the secondary_free_list. | |
| 557 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 558 } | |
| 559 | |
| 560 if (G1ConcRegionFreeingVerbose) { | |
| 561 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 562 "could not allocate from secondary_free_list"); | |
| 563 } | |
| 564 return NULL; | |
| 565 } | |
| 566 | |
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567 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool do_expand) { |
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568 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 569 "the only time we use this to allocate a humongous region is " |
| 570 "when we are allocating a single humongous region"); | |
| 571 | |
| 572 HeapRegion* res; | |
| 573 if (G1StressConcRegionFreeing) { | |
| 574 if (!_secondary_free_list.is_empty()) { | |
| 575 if (G1ConcRegionFreeingVerbose) { | |
| 576 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 577 "forced to look at the secondary_free_list"); | |
| 578 } | |
| 2361 | 579 res = new_region_try_secondary_free_list(); |
| 2152 | 580 if (res != NULL) { |
| 581 return res; | |
| 582 } | |
| 583 } | |
| 584 } | |
| 585 res = _free_list.remove_head_or_null(); | |
| 586 if (res == NULL) { | |
| 587 if (G1ConcRegionFreeingVerbose) { | |
| 588 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 589 "res == NULL, trying the secondary_free_list"); | |
| 590 } | |
| 2361 | 591 res = new_region_try_secondary_free_list(); |
| 2152 | 592 } |
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593 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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594 // Currently, only attempts to allocate GC alloc regions set |
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595 // do_expand to true. So, we should only reach here during a |
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596 // safepoint. If this assumption changes we might have to |
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597 // reconsider the use of _expand_heap_after_alloc_failure. |
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598 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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599 |
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600 ergo_verbose1(ErgoHeapSizing, |
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601 "attempt heap expansion", |
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602 ergo_format_reason("region allocation request failed") |
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603 ergo_format_byte("allocation request"), |
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604 word_size * HeapWordSize); |
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605 if (expand(word_size * HeapWordSize)) { |
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606 // Given that expand() succeeded in expanding the heap, and we |
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607 // always expand the heap by an amount aligned to the heap |
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608 // region size, the free list should in theory not be empty. So |
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609 // it would probably be OK to use remove_head(). But the extra |
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610 // check for NULL is unlikely to be a performance issue here (we |
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611 // just expanded the heap!) so let's just be conservative and |
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612 // use remove_head_or_null(). |
| 3766 | 613 res = _free_list.remove_head_or_null(); |
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614 } else { |
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615 _expand_heap_after_alloc_failure = false; |
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616 } |
| 342 | 617 } |
| 618 return res; | |
| 619 } | |
| 620 | |
| 3766 | 621 size_t G1CollectedHeap::humongous_obj_allocate_find_first(size_t num_regions, |
| 622 size_t word_size) { | |
| 2361 | 623 assert(isHumongous(word_size), "word_size should be humongous"); |
| 624 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 625 | |
| 3766 | 626 size_t first = G1_NULL_HRS_INDEX; |
| 2152 | 627 if (num_regions == 1) { |
| 628 // Only one region to allocate, no need to go through the slower | |
| 629 // path. The caller will attempt the expasion if this fails, so | |
| 630 // let's not try to expand here too. | |
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631 HeapRegion* hr = new_region(word_size, false /* do_expand */); |
| 2152 | 632 if (hr != NULL) { |
| 633 first = hr->hrs_index(); | |
| 634 } else { | |
| 3766 | 635 first = G1_NULL_HRS_INDEX; |
| 2152 | 636 } |
| 637 } else { | |
| 638 // We can't allocate humongous regions while cleanupComplete() is | |
| 639 // running, since some of the regions we find to be empty might not | |
| 640 // yet be added to the free list and it is not straightforward to | |
| 641 // know which list they are on so that we can remove them. Note | |
| 642 // that we only need to do this if we need to allocate more than | |
| 643 // one region to satisfy the current humongous allocation | |
| 644 // request. If we are only allocating one region we use the common | |
| 645 // region allocation code (see above). | |
| 646 wait_while_free_regions_coming(); | |
| 2361 | 647 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 648 |
| 649 if (free_regions() >= num_regions) { | |
| 3766 | 650 first = _hrs.find_contiguous(num_regions); |
| 651 if (first != G1_NULL_HRS_INDEX) { | |
| 652 for (size_t i = first; i < first + num_regions; ++i) { | |
| 653 HeapRegion* hr = region_at(i); | |
| 2152 | 654 assert(hr->is_empty(), "sanity"); |
| 2361 | 655 assert(is_on_master_free_list(hr), "sanity"); |
| 2152 | 656 hr->set_pending_removal(true); |
| 657 } | |
| 658 _free_list.remove_all_pending(num_regions); | |
| 659 } | |
| 660 } | |
| 661 } | |
| 662 return first; | |
| 663 } | |
| 664 | |
| 2361 | 665 HeapWord* |
| 3766 | 666 G1CollectedHeap::humongous_obj_allocate_initialize_regions(size_t first, |
| 2361 | 667 size_t num_regions, |
| 668 size_t word_size) { | |
| 3766 | 669 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
| 2361 | 670 assert(isHumongous(word_size), "word_size should be humongous"); |
| 671 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 672 | |
| 673 // Index of last region in the series + 1. | |
| 3766 | 674 size_t last = first + num_regions; |
| 2361 | 675 |
| 676 // We need to initialize the region(s) we just discovered. This is | |
| 677 // a bit tricky given that it can happen concurrently with | |
| 678 // refinement threads refining cards on these regions and | |
| 679 // potentially wanting to refine the BOT as they are scanning | |
| 680 // those cards (this can happen shortly after a cleanup; see CR | |
| 681 // 6991377). So we have to set up the region(s) carefully and in | |
| 682 // a specific order. | |
| 683 | |
| 684 // The word size sum of all the regions we will allocate. | |
| 685 size_t word_size_sum = num_regions * HeapRegion::GrainWords; | |
| 686 assert(word_size <= word_size_sum, "sanity"); | |
| 687 | |
| 688 // This will be the "starts humongous" region. | |
| 3766 | 689 HeapRegion* first_hr = region_at(first); |
| 2361 | 690 // The header of the new object will be placed at the bottom of |
| 691 // the first region. | |
| 692 HeapWord* new_obj = first_hr->bottom(); | |
| 693 // This will be the new end of the first region in the series that | |
| 694 // should also match the end of the last region in the seriers. | |
| 695 HeapWord* new_end = new_obj + word_size_sum; | |
| 696 // This will be the new top of the first region that will reflect | |
| 697 // this allocation. | |
| 698 HeapWord* new_top = new_obj + word_size; | |
| 699 | |
| 700 // First, we need to zero the header of the space that we will be | |
| 701 // allocating. When we update top further down, some refinement | |
| 702 // threads might try to scan the region. By zeroing the header we | |
| 703 // ensure that any thread that will try to scan the region will | |
| 704 // come across the zero klass word and bail out. | |
| 705 // | |
| 706 // NOTE: It would not have been correct to have used | |
| 707 // CollectedHeap::fill_with_object() and make the space look like | |
| 708 // an int array. The thread that is doing the allocation will | |
| 709 // later update the object header to a potentially different array | |
| 710 // type and, for a very short period of time, the klass and length | |
| 711 // fields will be inconsistent. This could cause a refinement | |
| 712 // thread to calculate the object size incorrectly. | |
| 713 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 714 | |
| 715 // We will set up the first region as "starts humongous". This | |
| 716 // will also update the BOT covering all the regions to reflect | |
| 717 // that there is a single object that starts at the bottom of the | |
| 718 // first region. | |
| 719 first_hr->set_startsHumongous(new_top, new_end); | |
| 720 | |
| 721 // Then, if there are any, we will set up the "continues | |
| 722 // humongous" regions. | |
| 723 HeapRegion* hr = NULL; | |
| 3766 | 724 for (size_t i = first + 1; i < last; ++i) { |
| 725 hr = region_at(i); | |
| 2361 | 726 hr->set_continuesHumongous(first_hr); |
| 727 } | |
| 728 // If we have "continues humongous" regions (hr != NULL), then the | |
| 729 // end of the last one should match new_end. | |
| 730 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 731 | |
| 732 // Up to this point no concurrent thread would have been able to | |
| 733 // do any scanning on any region in this series. All the top | |
| 734 // fields still point to bottom, so the intersection between | |
| 735 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 736 // update the top fields, we'll do a storestore to make sure that | |
| 737 // no thread sees the update to top before the zeroing of the | |
| 738 // object header and the BOT initialization. | |
| 739 OrderAccess::storestore(); | |
| 740 | |
| 741 // Now that the BOT and the object header have been initialized, | |
| 742 // we can update top of the "starts humongous" region. | |
| 743 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 744 "new_top should be in this region"); | |
| 745 first_hr->set_top(new_top); | |
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746 if (_hr_printer.is_active()) { |
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747 HeapWord* bottom = first_hr->bottom(); |
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748 HeapWord* end = first_hr->orig_end(); |
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749 if ((first + 1) == last) { |
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750 // the series has a single humongous region |
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751 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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752 } else { |
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753 // the series has more than one humongous regions |
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754 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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755 } |
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756 } |
| 2361 | 757 |
| 758 // Now, we will update the top fields of the "continues humongous" | |
| 759 // regions. The reason we need to do this is that, otherwise, | |
| 760 // these regions would look empty and this will confuse parts of | |
| 761 // G1. For example, the code that looks for a consecutive number | |
| 762 // of empty regions will consider them empty and try to | |
| 763 // re-allocate them. We can extend is_empty() to also include | |
| 764 // !continuesHumongous(), but it is easier to just update the top | |
| 765 // fields here. The way we set top for all regions (i.e., top == | |
| 766 // end for all regions but the last one, top == new_top for the | |
| 767 // last one) is actually used when we will free up the humongous | |
| 768 // region in free_humongous_region(). | |
| 769 hr = NULL; | |
| 3766 | 770 for (size_t i = first + 1; i < last; ++i) { |
| 771 hr = region_at(i); | |
| 2361 | 772 if ((i + 1) == last) { |
| 773 // last continues humongous region | |
| 774 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 775 "new_top should fall on this region"); | |
| 776 hr->set_top(new_top); | |
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777 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 778 } else { |
| 779 // not last one | |
| 780 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 781 hr->set_top(hr->end()); | |
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782 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 783 } |
| 784 } | |
| 785 // If we have continues humongous regions (hr != NULL), then the | |
| 786 // end of the last one should match new_end and its top should | |
| 787 // match new_top. | |
| 788 assert(hr == NULL || | |
| 789 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
| 790 | |
| 791 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 792 _summary_bytes_used += first_hr->used(); | |
| 793 _humongous_set.add(first_hr); | |
| 794 | |
| 795 return new_obj; | |
| 796 } | |
| 797 | |
| 342 | 798 // If could fit into free regions w/o expansion, try. |
| 799 // Otherwise, if can expand, do so. | |
| 800 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 801 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 802 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 803 | |
| 804 verify_region_sets_optional(); | |
| 342 | 805 |
| 806 size_t num_regions = | |
| 1973 | 807 round_to(word_size, HeapRegion::GrainWords) / HeapRegion::GrainWords; |
| 342 | 808 size_t x_size = expansion_regions(); |
| 3766 | 809 size_t fs = _hrs.free_suffix(); |
| 810 size_t first = humongous_obj_allocate_find_first(num_regions, word_size); | |
| 811 if (first == G1_NULL_HRS_INDEX) { | |
| 2152 | 812 // The only thing we can do now is attempt expansion. |
| 342 | 813 if (fs + x_size >= num_regions) { |
|
2188
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|
814 // If the number of regions we're trying to allocate for this |
|
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|
815 // object is at most the number of regions in the free suffix, |
|
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|
816 // then the call to humongous_obj_allocate_find_first() above |
|
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|
817 // should have succeeded and we wouldn't be here. |
|
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|
818 // |
|
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|
819 // We should only be trying to expand when the free suffix is |
|
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|
820 // not sufficient for the object _and_ we have some expansion |
|
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|
821 // room available. |
|
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|
822 assert(num_regions > fs, "earlier allocation should have succeeded"); |
|
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|
823 |
|
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|
824 ergo_verbose1(ErgoHeapSizing, |
|
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|
825 "attempt heap expansion", |
|
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|
826 ergo_format_reason("humongous allocation request failed") |
|
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|
827 ergo_format_byte("allocation request"), |
|
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|
828 word_size * HeapWordSize); |
|
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|
829 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
| 3766 | 830 // Even though the heap was expanded, it might not have |
| 831 // reached the desired size. So, we cannot assume that the | |
| 832 // allocation will succeed. | |
|
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|
833 first = humongous_obj_allocate_find_first(num_regions, word_size); |
|
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|
834 } |
| 2152 | 835 } |
| 836 } | |
| 837 | |
| 2361 | 838 HeapWord* result = NULL; |
| 3766 | 839 if (first != G1_NULL_HRS_INDEX) { |
| 2361 | 840 result = |
| 841 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
| 842 assert(result != NULL, "it should always return a valid result"); | |
|
3980
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|
843 |
|
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|
844 // A successful humongous object allocation changes the used space |
|
8229bd737950
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|
845 // information of the old generation so we need to recalculate the |
|
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|
846 // sizes and update the jstat counters here. |
|
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|
847 g1mm()->update_sizes(); |
| 2152 | 848 } |
| 849 | |
| 850 verify_region_sets_optional(); | |
| 2361 | 851 |
| 852 return result; | |
| 342 | 853 } |
| 854 | |
| 1973 | 855 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 856 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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|
857 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
|
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|
858 |
|
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|
859 unsigned int dummy_gc_count_before; |
|
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|
860 return attempt_allocation(word_size, &dummy_gc_count_before); |
| 342 | 861 } |
| 862 | |
| 863 HeapWord* | |
| 864 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 865 bool* gc_overhead_limit_was_exceeded) { |
| 866 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 867 |
|
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|
868 // Loop until the allocation is satisified, or unsatisfied after GC. |
| 1973 | 869 for (int try_count = 1; /* we'll return */; try_count += 1) { |
| 870 unsigned int gc_count_before; | |
|
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|
871 |
|
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|
872 HeapWord* result = NULL; |
|
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|
873 if (!isHumongous(word_size)) { |
|
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|
874 result = attempt_allocation(word_size, &gc_count_before); |
|
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|
875 } else { |
|
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|
876 result = attempt_allocation_humongous(word_size, &gc_count_before); |
|
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|
877 } |
|
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|
878 if (result != NULL) { |
|
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|
879 return result; |
| 342 | 880 } |
| 881 | |
| 882 // Create the garbage collection operation... | |
| 1973 | 883 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 884 // ...and get the VM thread to execute it. |
| 885 VMThread::execute(&op); | |
| 1973 | 886 |
| 887 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 888 // If the operation was successful we'll return the result even | |
| 889 // if it is NULL. If the allocation attempt failed immediately | |
| 890 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 891 HeapWord* result = op.result(); | |
| 892 if (result != NULL && !isHumongous(word_size)) { | |
| 893 // Allocations that take place on VM operations do not do any | |
| 894 // card dirtying and we have to do it here. We only have to do | |
| 895 // this for non-humongous allocations, though. | |
| 896 dirty_young_block(result, word_size); | |
| 897 } | |
| 342 | 898 return result; |
| 1973 | 899 } else { |
| 900 assert(op.result() == NULL, | |
| 901 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 902 } |
| 903 | |
| 904 // Give a warning if we seem to be looping forever. | |
| 905 if ((QueuedAllocationWarningCount > 0) && | |
| 906 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 907 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 908 } |
| 909 } | |
| 1973 | 910 |
| 911 ShouldNotReachHere(); | |
|
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|
912 return NULL; |
| 342 | 913 } |
| 914 | |
|
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|
915 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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|
916 unsigned int *gc_count_before_ret) { |
|
abdfc822206f
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|
917 // Make sure you read the note in attempt_allocation_humongous(). |
|
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|
918 |
|
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|
919 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
920 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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|
921 "be called for humongous allocation requests"); |
|
abdfc822206f
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diff
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|
922 |
|
abdfc822206f
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diff
changeset
|
923 // We should only get here after the first-level allocation attempt |
|
abdfc822206f
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diff
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|
924 // (attempt_allocation()) failed to allocate. |
|
abdfc822206f
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diff
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|
925 |
|
abdfc822206f
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diff
changeset
|
926 // We will loop until a) we manage to successfully perform the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
927 // allocation or b) we successfully schedule a collection which |
|
abdfc822206f
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diff
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|
928 // fails to perform the allocation. b) is the only case when we'll |
|
abdfc822206f
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2432
diff
changeset
|
929 // return NULL. |
|
abdfc822206f
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tonyp
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diff
changeset
|
930 HeapWord* result = NULL; |
|
abdfc822206f
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diff
changeset
|
931 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
abdfc822206f
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diff
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|
932 bool should_try_gc; |
|
abdfc822206f
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diff
changeset
|
933 unsigned int gc_count_before; |
|
abdfc822206f
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diff
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|
934 |
|
abdfc822206f
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diff
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|
935 { |
|
abdfc822206f
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diff
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|
936 MutexLockerEx x(Heap_lock); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
937 |
|
abdfc822206f
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diff
changeset
|
938 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
abdfc822206f
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|
939 false /* bot_updates */); |
|
abdfc822206f
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diff
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|
940 if (result != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
941 return result; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
942 } |
|
abdfc822206f
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parents:
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diff
changeset
|
943 |
|
abdfc822206f
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2432
diff
changeset
|
944 // If we reach here, attempt_allocation_locked() above failed to |
|
abdfc822206f
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2432
diff
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|
945 // allocate a new region. So the mutator alloc region should be NULL. |
|
abdfc822206f
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2432
diff
changeset
|
946 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
|
abdfc822206f
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|
947 |
|
abdfc822206f
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diff
changeset
|
948 if (GC_locker::is_active_and_needs_gc()) { |
|
abdfc822206f
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diff
changeset
|
949 if (g1_policy()->can_expand_young_list()) { |
|
3914
20213c8a3c40
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|
950 // No need for an ergo verbose message here, |
|
20213c8a3c40
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3886
diff
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|
951 // can_expand_young_list() does this when it returns true. |
|
2433
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|
952 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
|
abdfc822206f
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|
953 false /* bot_updates */); |
|
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diff
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|
954 if (result != NULL) { |
|
abdfc822206f
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|
955 return result; |
|
abdfc822206f
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diff
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|
956 } |
|
abdfc822206f
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|
957 } |
|
abdfc822206f
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diff
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|
958 should_try_gc = false; |
|
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|
959 } else { |
|
abdfc822206f
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diff
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|
960 // Read the GC count while still holding the Heap_lock. |
|
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
961 gc_count_before = total_collections(); |
|
2433
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|
962 should_try_gc = true; |
|
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|
963 } |
|
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|
964 } |
|
abdfc822206f
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|
965 |
|
abdfc822206f
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|
966 if (should_try_gc) { |
|
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|
967 bool succeeded; |
|
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|
968 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
|
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|
969 if (result != NULL) { |
|
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diff
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|
970 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
971 return result; |
|
abdfc822206f
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diff
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|
972 } |
|
abdfc822206f
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diff
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|
973 |
|
abdfc822206f
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diff
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|
974 if (succeeded) { |
|
abdfc822206f
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diff
changeset
|
975 // If we get here we successfully scheduled a collection which |
|
abdfc822206f
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diff
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|
976 // failed to allocate. No point in trying to allocate |
|
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diff
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|
977 // further. We'll just return NULL. |
|
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|
978 MutexLockerEx x(Heap_lock); |
|
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
979 *gc_count_before_ret = total_collections(); |
|
2433
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|
980 return NULL; |
|
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981 } |
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982 } else { |
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983 GC_locker::stall_until_clear(); |
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984 } |
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985 |
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986 // We can reach here if we were unsuccessul in scheduling a |
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987 // collection (because another thread beat us to it) or if we were |
|
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988 // stalled due to the GC locker. In either can we should retry the |
|
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989 // allocation attempt in case another thread successfully |
|
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990 // performed a collection and reclaimed enough space. We do the |
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991 // first attempt (without holding the Heap_lock) here and the |
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992 // follow-on attempt will be at the start of the next loop |
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993 // iteration (after taking the Heap_lock). |
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994 result = _mutator_alloc_region.attempt_allocation(word_size, |
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995 false /* bot_updates */); |
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996 if (result != NULL ){ |
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997 return result; |
|
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998 } |
|
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999 |
|
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1000 // Give a warning if we seem to be looping forever. |
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1001 if ((QueuedAllocationWarningCount > 0) && |
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1002 (try_count % QueuedAllocationWarningCount == 0)) { |
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1003 warning("G1CollectedHeap::attempt_allocation_slow() " |
|
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1004 "retries %d times", try_count); |
|
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1005 } |
|
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1006 } |
|
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1007 |
|
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1008 ShouldNotReachHere(); |
|
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1009 return NULL; |
|
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1010 } |
|
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1011 |
|
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1012 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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1013 unsigned int * gc_count_before_ret) { |
|
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1014 // The structure of this method has a lot of similarities to |
|
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1015 // attempt_allocation_slow(). The reason these two were not merged |
|
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1016 // into a single one is that such a method would require several "if |
|
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1017 // allocation is not humongous do this, otherwise do that" |
|
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1018 // conditional paths which would obscure its flow. In fact, an early |
|
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1019 // version of this code did use a unified method which was harder to |
|
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1020 // follow and, as a result, it had subtle bugs that were hard to |
|
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1021 // track down. So keeping these two methods separate allows each to |
|
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1022 // be more readable. It will be good to keep these two in sync as |
|
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1023 // much as possible. |
|
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|
1024 |
|
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1025 assert_heap_not_locked_and_not_at_safepoint(); |
|
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1026 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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1027 "should only be called for humongous allocations"); |
|
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|
1028 |
|
4834
6a78aa6ac1ff
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1029 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
6a78aa6ac1ff
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|
1030 // need to start a marking cycle at each humongous object allocation. We do |
|
6a78aa6ac1ff
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|
1031 // the check before we do the actual allocation. The reason for doing it |
|
6a78aa6ac1ff
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1032 // before the allocation is that we avoid having to keep track of the newly |
|
6a78aa6ac1ff
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|
1033 // allocated memory while we do a GC. |
|
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
1034 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
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|
1035 word_size)) { |
|
4834
6a78aa6ac1ff
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|
1036 collect(GCCause::_g1_humongous_allocation); |
|
6a78aa6ac1ff
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|
1037 } |
|
6a78aa6ac1ff
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|
1038 |
|
2433
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|
1039 // We will loop until a) we manage to successfully perform the |
|
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|
1040 // allocation or b) we successfully schedule a collection which |
|
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|
1041 // fails to perform the allocation. b) is the only case when we'll |
|
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|
1042 // return NULL. |
|
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|
1043 HeapWord* result = NULL; |
|
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|
1044 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
1045 bool should_try_gc; |
|
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|
1046 unsigned int gc_count_before; |
|
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|
1047 |
|
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|
1048 { |
|
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|
1049 MutexLockerEx x(Heap_lock); |
|
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|
1050 |
|
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|
1051 // Given that humongous objects are not allocated in young |
|
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|
1052 // regions, we'll first try to do the allocation without doing a |
|
abdfc822206f
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|
1053 // collection hoping that there's enough space in the heap. |
|
abdfc822206f
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|
1054 result = humongous_obj_allocate(word_size); |
|
abdfc822206f
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diff
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|
1055 if (result != NULL) { |
|
abdfc822206f
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parents:
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|
1056 return result; |
|
abdfc822206f
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diff
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|
1057 } |
|
abdfc822206f
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|
1058 |
|
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|
1059 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
1060 should_try_gc = false; |
|
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|
1061 } else { |
|
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|
1062 // Read the GC count while still holding the Heap_lock. |
|
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
1063 gc_count_before = total_collections(); |
|
2433
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|
1064 should_try_gc = true; |
|
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|
1065 } |
|
abdfc822206f
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diff
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|
1066 } |
|
abdfc822206f
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diff
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|
1067 |
|
abdfc822206f
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|
1068 if (should_try_gc) { |
|
abdfc822206f
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|
1069 // If we failed to allocate the humongous object, we should try to |
|
abdfc822206f
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|
1070 // do a collection pause (if we're allowed) in case it reclaims |
|
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|
1071 // enough space for the allocation to succeed after the pause. |
|
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diff
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|
1072 |
|
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diff
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|
1073 bool succeeded; |
|
abdfc822206f
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|
1074 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
|
abdfc822206f
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|
1075 if (result != NULL) { |
|
abdfc822206f
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diff
changeset
|
1076 assert(succeeded, "only way to get back a non-NULL result"); |
|
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diff
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|
1077 return result; |
|
abdfc822206f
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diff
changeset
|
1078 } |
|
abdfc822206f
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diff
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|
1079 |
|
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diff
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|
1080 if (succeeded) { |
|
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diff
changeset
|
1081 // If we get here we successfully scheduled a collection which |
|
abdfc822206f
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|
1082 // failed to allocate. No point in trying to allocate |
|
abdfc822206f
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|
1083 // further. We'll just return NULL. |
|
abdfc822206f
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|
1084 MutexLockerEx x(Heap_lock); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
1085 *gc_count_before_ret = total_collections(); |
|
2433
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|
1086 return NULL; |
|
abdfc822206f
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tonyp
parents:
2432
diff
changeset
|
1087 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
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|
1088 } else { |
|
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diff
changeset
|
1089 GC_locker::stall_until_clear(); |
|
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diff
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|
1090 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
1091 |
|
abdfc822206f
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parents:
2432
diff
changeset
|
1092 // We can reach here if we were unsuccessul in scheduling a |
|
abdfc822206f
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|
1093 // collection (because another thread beat us to it) or if we were |
|
abdfc822206f
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|
1094 // stalled due to the GC locker. In either can we should retry the |
|
abdfc822206f
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|
1095 // allocation attempt in case another thread successfully |
|
abdfc822206f
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diff
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|
1096 // performed a collection and reclaimed enough space. Give a |
|
abdfc822206f
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diff
changeset
|
1097 // warning if we seem to be looping forever. |
|
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diff
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|
1098 |
|
abdfc822206f
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diff
changeset
|
1099 if ((QueuedAllocationWarningCount > 0) && |
|
abdfc822206f
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|
1100 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1101 warning("G1CollectedHeap::attempt_allocation_humongous() " |
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1102 "retries %d times", try_count); |
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1103 } |
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1104 } |
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1105 |
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1106 ShouldNotReachHere(); |
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1107 return NULL; |
|
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1108 } |
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1109 |
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1110 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
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1111 bool expect_null_mutator_alloc_region) { |
| 2152 | 1112 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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1113 assert(_mutator_alloc_region.get() == NULL || |
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1114 !expect_null_mutator_alloc_region, |
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1115 "the current alloc region was unexpectedly found to be non-NULL"); |
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1116 |
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1117 if (!isHumongous(word_size)) { |
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1118 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
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1119 false /* bot_updates */); |
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1120 } else { |
|
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1121 HeapWord* result = humongous_obj_allocate(word_size); |
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1122 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
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1123 g1_policy()->set_initiate_conc_mark_if_possible(); |
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1124 } |
|
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1125 return result; |
|
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1126 } |
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1127 |
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1128 ShouldNotReachHere(); |
| 342 | 1129 } |
| 1130 | |
| 1131 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
| 1132 ModRefBarrierSet* _mr_bs; | |
| 1133 public: | |
| 1134 PostMCRemSetClearClosure(ModRefBarrierSet* mr_bs) : _mr_bs(mr_bs) {} | |
| 1135 bool doHeapRegion(HeapRegion* r) { | |
| 1136 r->reset_gc_time_stamp(); | |
| 1137 if (r->continuesHumongous()) | |
| 1138 return false; | |
| 1139 HeapRegionRemSet* hrrs = r->rem_set(); | |
| 1140 if (hrrs != NULL) hrrs->clear(); | |
| 1141 // You might think here that we could clear just the cards | |
| 1142 // corresponding to the used region. But no: if we leave a dirty card | |
| 1143 // in a region we might allocate into, then it would prevent that card | |
| 1144 // from being enqueued, and cause it to be missed. | |
| 1145 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1146 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 1147 return false; | |
| 1148 } | |
| 1149 }; | |
| 1150 | |
| 1151 | |
| 1152 class PostMCRemSetInvalidateClosure: public HeapRegionClosure { | |
| 1153 ModRefBarrierSet* _mr_bs; | |
| 1154 public: | |
| 1155 PostMCRemSetInvalidateClosure(ModRefBarrierSet* mr_bs) : _mr_bs(mr_bs) {} | |
| 1156 bool doHeapRegion(HeapRegion* r) { | |
| 1157 if (r->continuesHumongous()) return false; | |
| 1158 if (r->used_region().word_size() != 0) { | |
| 1159 _mr_bs->invalidate(r->used_region(), true /*whole heap*/); | |
| 1160 } | |
| 1161 return false; | |
| 1162 } | |
| 1163 }; | |
| 1164 | |
|
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1165 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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1166 G1CollectedHeap* _g1h; |
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1167 UpdateRSOopClosure _cl; |
|
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1168 int _worker_i; |
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1169 public: |
|
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1170 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1171 _cl(g1->g1_rem_set(), worker_i), |
|
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1172 _worker_i(worker_i), |
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1173 _g1h(g1) |
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1174 { } |
|
1960
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1175 |
|
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1176 bool doHeapRegion(HeapRegion* r) { |
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1177 if (!r->continuesHumongous()) { |
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1178 _cl.set_from(r); |
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1179 r->oop_iterate(&_cl); |
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1180 } |
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1181 return false; |
|
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1182 } |
|
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1183 }; |
|
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1184 |
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1185 class ParRebuildRSTask: public AbstractGangTask { |
|
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1186 G1CollectedHeap* _g1; |
|
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1187 public: |
|
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1188 ParRebuildRSTask(G1CollectedHeap* g1) |
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1189 : AbstractGangTask("ParRebuildRSTask"), |
|
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1190 _g1(g1) |
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1191 { } |
|
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1192 |
|
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1193 void work(uint worker_id) { |
|
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1194 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
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1195 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
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1196 _g1->workers()->active_workers(), |
|
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1197 HeapRegion::RebuildRSClaimValue); |
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1198 } |
|
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1199 }; |
|
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|
1200 |
|
3778
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1201 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
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1202 private: |
|
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1203 G1HRPrinter* _hr_printer; |
|
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1204 public: |
|
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1205 bool doHeapRegion(HeapRegion* hr) { |
|
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1206 assert(!hr->is_young(), "not expecting to find young regions"); |
|
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1207 // We only generate output for non-empty regions. |
|
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1208 if (!hr->is_empty()) { |
|
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1209 if (!hr->isHumongous()) { |
|
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1210 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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1211 } else if (hr->startsHumongous()) { |
|
3986
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|
1212 if (hr->capacity() == HeapRegion::GrainBytes) { |
|
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1213 // single humongous region |
|
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1214 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
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1215 } else { |
|
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1216 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
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1217 } |
|
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1218 } else { |
|
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1219 assert(hr->continuesHumongous(), "only way to get here"); |
|
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1220 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
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1221 } |
|
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|
1222 } |
|
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|
1223 return false; |
|
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|
1224 } |
|
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1225 |
|
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1226 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
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1227 : _hr_printer(hr_printer) { } |
|
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|
1228 }; |
|
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|
1229 |
| 1973 | 1230 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
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|
1231 bool clear_all_soft_refs, |
| 342 | 1232 size_t word_size) { |
| 2152 | 1233 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1234 | |
|
1359
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|
1235 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1236 return false; |
|
1359
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|
1237 } |
|
23b1b27ac76c
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|
1238 |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
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|
1239 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1240 ResourceMark rm; |
| 1241 | |
|
4872
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|
1242 print_heap_before_gc(); |
|
838
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1243 |
| 4072 | 1244 HRSPhaseSetter x(HRSPhaseFullGC); |
| 2152 | 1245 verify_region_sets_optional(); |
| 342 | 1246 |
|
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1247 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
|
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|
1248 collector_policy()->should_clear_all_soft_refs(); |
|
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|
1249 |
|
0bfd3fb24150
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|
1250 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
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1251 |
| 342 | 1252 { |
| 1253 IsGCActiveMark x; | |
| 1254 | |
| 1255 // Timing | |
|
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|
1256 bool system_gc = (gc_cause() == GCCause::_java_lang_system_gc); |
|
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|
1257 assert(!system_gc || explicit_gc, "invariant"); |
| 342 | 1258 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps); |
| 1259 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty); | |
|
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|
1260 TraceTime t(system_gc ? "Full GC (System.gc())" : "Full GC", |
|
1387
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6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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|
1261 PrintGC, true, gclog_or_tty); |
| 342 | 1262 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
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diff
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|
1263 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
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|
1264 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
1089
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|
1265 |
| 342 | 1266 double start = os::elapsedTime(); |
| 1267 g1_policy()->record_full_collection_start(); | |
| 1268 | |
|
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|
1269 // Note: When we have a more flexible GC logging framework that |
|
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|
1270 // allows us to add optional attributes to a GC log record we |
|
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|
1271 // could consider timing and reporting how long we wait in the |
|
eff609af17d7
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|
1272 // following two methods. |
| 2152 | 1273 wait_while_free_regions_coming(); |
|
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|
1274 // If we start the compaction before the CM threads finish |
|
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|
1275 // scanning the root regions we might trip them over as we'll |
|
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|
1276 // be moving objects / updating references. So let's wait until |
|
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|
1277 // they are done. By telling them to abort, they should complete |
|
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|
1278 // early. |
|
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|
1279 _cm->root_regions()->abort(); |
|
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|
1280 _cm->root_regions()->wait_until_scan_finished(); |
| 2361 | 1281 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 1282 |
| 342 | 1283 gc_prologue(true); |
|
838
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6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
1284 increment_total_collections(true /* full gc */); |
| 342 | 1285 |
| 1286 size_t g1h_prev_used = used(); | |
| 1287 assert(used() == recalculate_used(), "Should be equal"); | |
| 1288 | |
| 1289 if (VerifyBeforeGC && total_collections() >= VerifyGCStartAt) { | |
| 1290 HandleMark hm; // Discard invalid handles created during verification | |
|
2433
abdfc822206f
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|
1291 gclog_or_tty->print(" VerifyBeforeGC:"); |
| 342 | 1292 prepare_for_verify(); |
|
3772
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|
1293 Universe::verify(/* allow dirty */ true, |
|
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|
1294 /* silent */ false, |
|
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|
1295 /* option */ VerifyOption_G1UsePrevMarking); |
|
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|
1296 |
| 342 | 1297 } |
|
3869
7f776886a215
6810861: G1: support -XX:+{PrintClassHistogram,HeapDump}{Before,After}FullGC
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parents:
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diff
changeset
|
1298 pre_full_gc_dump(); |
| 342 | 1299 |
| 1300 COMPILER2_PRESENT(DerivedPointerTable::clear()); | |
| 1301 | |
|
3979
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|
1302 // Disable discovery and empty the discovered lists |
|
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|
1303 // for the CM ref processor. |
|
4dfb2df418f2
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|
1304 ref_processor_cm()->disable_discovery(); |
|
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|
1305 ref_processor_cm()->abandon_partial_discovery(); |
|
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|
1306 ref_processor_cm()->verify_no_references_recorded(); |
| 342 | 1307 |
| 1308 // Abandon current iterations of concurrent marking and concurrent | |
|
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|
1309 // refinement, if any are in progress. We have to do this before |
|
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|
1310 // wait_until_scan_finished() below. |
| 342 | 1311 concurrent_mark()->abort(); |
| 1312 | |
| 1313 // Make sure we'll choose a new allocation region afterwards. | |
|
2433
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changeset
|
1314 release_mutator_alloc_region(); |
| 636 | 1315 abandon_gc_alloc_regions(); |
| 1861 | 1316 g1_rem_set()->cleanupHRRS(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
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diff
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|
1317 |
|
3778
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|
1318 // We should call this after we retire any currently active alloc |
|
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changeset
|
1319 // regions so that all the ALLOC / RETIRE events are generated |
|
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|
1320 // before the start GC event. |
|
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|
1321 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
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|
1322 |
|
1394
1316cec51b4d
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diff
changeset
|
1323 // We may have added regions to the current incremental collection |
|
1316cec51b4d
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johnc
parents:
1391
diff
changeset
|
1324 // set between the last GC or pause and now. We need to clear the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
1325 // incremental collection set and then start rebuilding it afresh |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
1326 // after this full GC. |
|
1316cec51b4d
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diff
changeset
|
1327 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
1316cec51b4d
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diff
changeset
|
1328 g1_policy()->clear_incremental_cset(); |
|
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diff
changeset
|
1329 g1_policy()->stop_incremental_cset_building(); |
|
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diff
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|
1330 |
| 4072 | 1331 tear_down_region_sets(false /* free_list_only */); |
| 4710 | 1332 g1_policy()->set_gcs_are_young(true); |
| 342 | 1333 |
|
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|
1334 // See the comments in g1CollectedHeap.hpp and |
|
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diff
changeset
|
1335 // G1CollectedHeap::ref_processing_init() about |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
1336 // how reference processing currently works in G1. |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
1337 |
|
3979
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|
1338 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
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diff
changeset
|
1339 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
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|
1340 |
|
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|
1341 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
4dfb2df418f2
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changeset
|
1342 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
4dfb2df418f2
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|
1343 |
|
4dfb2df418f2
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|
1344 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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parents:
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|
1345 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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|
1346 |
| 342 | 1347 // Do collection work |
| 1348 { | |
| 1349 HandleMark hm; // Discard invalid handles created during gc | |
|
3979
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|
1350 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
| 342 | 1351 } |
|
3979
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|
1352 |
| 2152 | 1353 assert(free_regions() == 0, "we should not have added any free regions"); |
| 4072 | 1354 rebuild_region_sets(false /* free_list_only */); |
| 342 | 1355 |
|
3979
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|
1356 // Enqueue any discovered reference objects that have |
|
4dfb2df418f2
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|
1357 // not been removed from the discovered lists. |
|
4dfb2df418f2
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diff
changeset
|
1358 ref_processor_stw()->enqueue_discovered_references(); |
| 342 | 1359 |
| 1360 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); | |
| 1361 | |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
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diff
changeset
|
1362 MemoryService::track_memory_usage(); |
|
db0d5eba9d20
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diff
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|
1363 |
| 342 | 1364 if (VerifyAfterGC && total_collections() >= VerifyGCStartAt) { |
| 1365 HandleMark hm; // Discard invalid handles created during verification | |
| 1366 gclog_or_tty->print(" VerifyAfterGC:"); | |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
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parents:
636
diff
changeset
|
1367 prepare_for_verify(); |
|
3772
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|
1368 Universe::verify(/* allow dirty */ false, |
|
6747fd0512e0
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|
1369 /* silent */ false, |
|
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|
1370 /* option */ VerifyOption_G1UsePrevMarking); |
|
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changeset
|
1371 |
| 342 | 1372 } |
|
3979
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diff
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|
1373 |
|
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diff
changeset
|
1374 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
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|
1375 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
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|
1376 |
|
4dfb2df418f2
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changeset
|
1377 // Note: since we've just done a full GC, concurrent |
|
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|
1378 // marking is no longer active. Therefore we need not |
|
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changeset
|
1379 // re-enable reference discovery for the CM ref processor. |
|
4dfb2df418f2
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changeset
|
1380 // That will be done at the start of the next marking cycle. |
|
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changeset
|
1381 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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changeset
|
1382 ref_processor_cm()->verify_no_references_recorded(); |
| 342 | 1383 |
| 1384 reset_gc_time_stamp(); | |
| 1385 // Since everything potentially moved, we will clear all remembered | |
|
626
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diff
changeset
|
1386 // sets, and clear all cards. Later we will rebuild remebered |
|
87fa6e083d82
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diff
changeset
|
1387 // sets. We will also reset the GC time stamps of the regions. |
| 342 | 1388 PostMCRemSetClearClosure rs_clear(mr_bs()); |
| 1389 heap_region_iterate(&rs_clear); | |
| 1390 | |
| 1391 // Resize the heap if necessary. | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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diff
changeset
|
1392 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
| 342 | 1393 |
|
3778
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|
1394 if (_hr_printer.is_active()) { |
|
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|
1395 // We should do this after we potentially resize the heap so |
|
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|
1396 // that all the COMMIT / UNCOMMIT events are generated before |
|
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|
1397 // the end GC event. |
|
5f6f2615433a
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|
1398 |
|
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changeset
|
1399 PostCompactionPrinterClosure cl(hr_printer()); |
|
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|
1400 heap_region_iterate(&cl); |
|
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|
1401 |
|
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changeset
|
1402 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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|
1403 } |
|
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|
1404 |
| 342 | 1405 if (_cg1r->use_cache()) { |
| 1406 _cg1r->clear_and_record_card_counts(); | |
| 1407 _cg1r->clear_hot_cache(); | |
| 1408 } | |
| 1409 | |
|
626
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diff
changeset
|
1410 // Rebuild remembered sets of all regions. |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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1755
diff
changeset
|
1411 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
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diff
changeset
|
1412 uint n_workers = |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
changeset
|
1413 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
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changeset
|
1414 workers()->active_workers(), |
|
bca17e38de00
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changeset
|
1415 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
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|
1416 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
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changeset
|
1417 n_workers == workers()->total_workers(), |
|
bca17e38de00
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diff
changeset
|
1418 "If not dynamic should be using all the workers"); |
|
bca17e38de00
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changeset
|
1419 workers()->set_active_workers(n_workers); |
|
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1420 // Set parallel threads in the heap (_n_par_threads) only |
|
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1421 // before a parallel phase and always reset it to 0 after |
|
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1422 // the phase so that the number of parallel threads does |
|
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|
1423 // no get carried forward to a serial phase where there |
|
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1424 // may be code that is "possibly_parallel". |
|
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1425 set_par_threads(n_workers); |
|
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|
1426 |
|
626
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1427 ParRebuildRSTask rebuild_rs_task(this); |
|
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1428 assert(check_heap_region_claim_values( |
|
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1429 HeapRegion::InitialClaimValue), "sanity check"); |
|
4095
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|
1430 assert(UseDynamicNumberOfGCThreads || |
|
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|
1431 workers()->active_workers() == workers()->total_workers(), |
|
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|
1432 "Unless dynamic should use total workers"); |
|
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|
1433 // Use the most recent number of active workers |
|
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|
1434 assert(workers()->active_workers() > 0, |
|
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1435 "Active workers not properly set"); |
|
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|
1436 set_par_threads(workers()->active_workers()); |
|
626
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|
1437 workers()->run_task(&rebuild_rs_task); |
|
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|
1438 set_par_threads(0); |
|
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|
1439 assert(check_heap_region_claim_values( |
|
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1440 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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1441 reset_heap_region_claim_values(); |
|
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|
1442 } else { |
|
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|
1443 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1444 heap_region_iterate(&rebuild_rs); |
|
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|
1445 } |
|
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|
1446 |
| 342 | 1447 if (PrintGC) { |
| 1448 print_size_transition(gclog_or_tty, g1h_prev_used, used(), capacity()); | |
| 1449 } | |
| 1450 | |
| 1451 if (true) { // FIXME | |
| 1452 // Ask the permanent generation to adjust size for full collections | |
| 1453 perm()->compute_new_size(); | |
| 1454 } | |
| 1455 | |
|
1394
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|
1456 // Start a new incremental collection set for the next pause |
|
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|
1457 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
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|
1458 g1_policy()->start_incremental_cset_building(); |
|
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|
1459 |
|
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|
1460 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
1316cec51b4d
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|
1461 // regions to the incremental collection set for the next |
|
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|
1462 // evacuation pause. |
|
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|
1463 clear_cset_fast_test(); |
|
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|
1464 |
|
2433
abdfc822206f
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|
1465 init_mutator_alloc_region(); |
|
abdfc822206f
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diff
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|
1466 |
| 342 | 1467 double end = os::elapsedTime(); |
| 1468 g1_policy()->record_full_collection_end(); | |
| 1469 | |
|
546
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6690928: Use spinning in combination with yields for workstealing termination.
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|
1470 #ifdef TRACESPINNING |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
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|
1471 ParallelTaskTerminator::print_termination_counts(); |
|
05c6d52fa7a9
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|
1472 #endif |
|
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|
1473 |
| 342 | 1474 gc_epilogue(true); |
| 1475 | |
| 794 | 1476 // Discard all rset updates |
| 1477 JavaThread::dirty_card_queue_set().abandon_logs(); | |
|
616
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6720309: G1: don't synchronously update RSet during evacuation pauses
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|
1478 assert(!G1DeferredRSUpdate |
|
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|
1479 || (G1DeferredRSUpdate && (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
| 342 | 1480 } |
| 1481 | |
|
3867
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|
1482 _young_list->reset_sampled_info(); |
|
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|
1483 // At this point there should be no regions in the |
|
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|
1484 // entire heap tagged as young. |
|
ff53346271fe
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|
1485 assert( check_young_list_empty(true /* check_heap */), |
|
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diff
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|
1486 "young list should be empty at this point"); |
|
838
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|
1487 |
|
1656
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|
1488 // Update the number of full collections that have been completed. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
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diff
changeset
|
1489 increment_full_collections_completed(false /* concurrent */); |
|
1656
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parents:
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|
1490 |
| 3766 | 1491 _hrs.verify_optional(); |
| 2152 | 1492 verify_region_sets_optional(); |
| 1493 | |
|
4872
aa3d708d67c4
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|
1494 print_heap_after_gc(); |
|
3980
8229bd737950
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changeset
|
1495 g1mm()->update_sizes(); |
|
3869
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|
1496 post_full_gc_dump(); |
| 1973 | 1497 |
| 1498 return true; | |
| 342 | 1499 } |
| 1500 | |
| 1501 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1502 // do_collection() will return whether it succeeded in performing |
| 1503 // the GC. Currently, there is no facility on the | |
| 1504 // do_full_collection() API to notify the caller than the collection | |
| 1505 // did not succeed (e.g., because it was locked out by the GC | |
| 1506 // locker). So, right now, we'll ignore the return value. | |
| 1507 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1508 clear_all_soft_refs, | |
| 1509 0 /* word_size */); | |
| 342 | 1510 } |
| 1511 | |
| 1512 // This code is mostly copied from TenuredGeneration. | |
| 1513 void | |
| 1514 G1CollectedHeap:: | |
| 1515 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1516 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, "sanity check"); | |
| 1517 | |
| 1518 // Include the current allocation, if any, and bytes that will be | |
| 1519 // pre-allocated to support collections, as "used". | |
| 1520 const size_t used_after_gc = used(); | |
| 1521 const size_t capacity_after_gc = capacity(); | |
| 1522 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1523 | |
|
1717
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|
1524 // This is enforced in arguments.cpp. |
|
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|
1525 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
|
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|
1526 "otherwise the code below doesn't make sense"); |
|
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|
1527 |
| 342 | 1528 // We don't have floating point command-line arguments |
|
1717
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|
1529 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1530 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
1717
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|
1531 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1532 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1533 | |
|
1717
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|
1534 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
|
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|
1535 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
|
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|
1536 |
|
688c3755d7af
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|
1537 // We have to be careful here as these two calculations can overflow |
|
688c3755d7af
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|
1538 // 32-bit size_t's. |
|
688c3755d7af
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|
1539 double used_after_gc_d = (double) used_after_gc; |
|
688c3755d7af
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|
1540 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
|
688c3755d7af
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|
1541 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
|
688c3755d7af
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|
1542 |
|
688c3755d7af
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|
1543 // Let's make sure that they are both under the max heap size, which |
|
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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|
1544 // by default will make them fit into a size_t. |
|
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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|
1545 double desired_capacity_upper_bound = (double) max_heap_size; |
|
688c3755d7af
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|
1546 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
|
688c3755d7af
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|
1547 desired_capacity_upper_bound); |
|
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|
1548 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
|
688c3755d7af
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|
1549 desired_capacity_upper_bound); |
|
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|
1550 |
|
688c3755d7af
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|
1551 // We can now safely turn them into size_t's. |
|
688c3755d7af
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|
1552 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
|
688c3755d7af
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|
1553 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
|
688c3755d7af
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|
1554 |
|
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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changeset
|
1555 // This assert only makes sense here, before we adjust them |
|
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
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changeset
|
1556 // with respect to the min and max heap size. |
|
688c3755d7af
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changeset
|
1557 assert(minimum_desired_capacity <= maximum_desired_capacity, |
|
688c3755d7af
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changeset
|
1558 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
|
688c3755d7af
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changeset
|
1559 "maximum_desired_capacity = "SIZE_FORMAT, |
|
688c3755d7af
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|
1560 minimum_desired_capacity, maximum_desired_capacity)); |
|
688c3755d7af
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|
1561 |
|
688c3755d7af
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changeset
|
1562 // Should not be greater than the heap max size. No need to adjust |
|
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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|
1563 // it with respect to the heap min size as it's a lower bound (i.e., |
|
688c3755d7af
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|
1564 // we'll try to make the capacity larger than it, not smaller). |
|
688c3755d7af
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|
1565 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
|
688c3755d7af
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|
1566 // Should not be less than the heap min size. No need to adjust it |
|
688c3755d7af
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|
1567 // with respect to the heap max size as it's an upper bound (i.e., |
|
688c3755d7af
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|
1568 // we'll try to make the capacity smaller than it, not greater). |
|
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1569 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1570 |
|
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1571 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1572 // Don't expand unless it's significant |
| 1573 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1574 ergo_verbose4(ErgoHeapSizing, |
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1575 "attempt heap expansion", |
|
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1576 ergo_format_reason("capacity lower than " |
|
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1577 "min desired capacity after Full GC") |
|
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1578 ergo_format_byte("capacity") |
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1579 ergo_format_byte("occupancy") |
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1580 ergo_format_byte_perc("min desired capacity"), |
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1581 capacity_after_gc, used_after_gc, |
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1582 minimum_desired_capacity, (double) MinHeapFreeRatio); |
|
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1583 expand(expand_bytes); |
| 342 | 1584 |
| 1585 // No expansion, now see if we want to shrink | |
|
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1586 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1587 // Capacity too large, compute shrinking size |
| 1588 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1589 ergo_verbose4(ErgoHeapSizing, |
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1590 "attempt heap shrinking", |
|
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1591 ergo_format_reason("capacity higher than " |
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1592 "max desired capacity after Full GC") |
|
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1593 ergo_format_byte("capacity") |
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1594 ergo_format_byte("occupancy") |
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1595 ergo_format_byte_perc("max desired capacity"), |
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1596 capacity_after_gc, used_after_gc, |
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1597 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1598 shrink(shrink_bytes); |
| 1599 } | |
| 1600 } | |
| 1601 | |
| 1602 | |
| 1603 HeapWord* | |
| 1973 | 1604 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1605 bool* succeeded) { | |
| 2152 | 1606 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1607 |
| 1608 *succeeded = true; | |
| 1609 // Let's attempt the allocation first. | |
|
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1610 HeapWord* result = |
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1611 attempt_allocation_at_safepoint(word_size, |
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1612 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1613 if (result != NULL) { |
| 1614 assert(*succeeded, "sanity"); | |
| 1615 return result; | |
| 1616 } | |
| 342 | 1617 |
| 1618 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1619 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1620 // expansion over collection. (This might change in the future if we can | |
| 1621 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1622 result = expand_and_allocate(word_size); | |
| 1623 if (result != NULL) { | |
| 1973 | 1624 assert(*succeeded, "sanity"); |
| 342 | 1625 return result; |
| 1626 } | |
| 1627 | |
| 1973 | 1628 // Expansion didn't work, we'll try to do a Full GC. |
| 1629 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1630 false, /* clear_all_soft_refs */ | |
| 1631 word_size); | |
| 1632 if (!gc_succeeded) { | |
| 1633 *succeeded = false; | |
| 1634 return NULL; | |
| 1635 } | |
| 1636 | |
| 1637 // Retry the allocation | |
| 1638 result = attempt_allocation_at_safepoint(word_size, | |
|
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1639 true /* expect_null_mutator_alloc_region */); |
| 342 | 1640 if (result != NULL) { |
| 1973 | 1641 assert(*succeeded, "sanity"); |
| 342 | 1642 return result; |
| 1643 } | |
| 1644 | |
| 1973 | 1645 // Then, try a Full GC that will collect all soft references. |
| 1646 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1647 true, /* clear_all_soft_refs */ | |
| 1648 word_size); | |
| 1649 if (!gc_succeeded) { | |
| 1650 *succeeded = false; | |
| 1651 return NULL; | |
| 1652 } | |
| 1653 | |
| 1654 // Retry the allocation once more | |
| 1655 result = attempt_allocation_at_safepoint(word_size, | |
|
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1656 true /* expect_null_mutator_alloc_region */); |
| 342 | 1657 if (result != NULL) { |
| 1973 | 1658 assert(*succeeded, "sanity"); |
| 342 | 1659 return result; |
| 1660 } | |
| 1661 | |
|
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1662 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1663 "Flag should have been handled and cleared prior to this point"); |
|
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1664 |
| 342 | 1665 // What else? We might try synchronous finalization later. If the total |
| 1666 // space available is large enough for the allocation, then a more | |
| 1667 // complete compaction phase than we've tried so far might be | |
| 1668 // appropriate. | |
| 1973 | 1669 assert(*succeeded, "sanity"); |
| 342 | 1670 return NULL; |
| 1671 } | |
| 1672 | |
| 1673 // Attempting to expand the heap sufficiently | |
| 1674 // to support an allocation of the given "word_size". If | |
| 1675 // successful, perform the allocation and return the address of the | |
| 1676 // allocated block, or else "NULL". | |
| 1677 | |
| 1678 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1679 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1680 | |
| 1681 verify_region_sets_optional(); | |
| 1973 | 1682 |
|
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1683 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1684 ergo_verbose1(ErgoHeapSizing, |
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1685 "attempt heap expansion", |
|
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1686 ergo_format_reason("allocation request failed") |
|
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1687 ergo_format_byte("allocation request"), |
|
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|
1688 word_size * HeapWordSize); |
|
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1689 if (expand(expand_bytes)) { |
| 3766 | 1690 _hrs.verify_optional(); |
|
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1691 verify_region_sets_optional(); |
|
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1692 return attempt_allocation_at_safepoint(word_size, |
|
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1693 false /* expect_null_mutator_alloc_region */); |
|
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1694 } |
|
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1695 return NULL; |
| 342 | 1696 } |
| 1697 | |
| 3766 | 1698 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
| 1699 HeapWord* new_end) { | |
| 1700 assert(old_end != new_end, "don't call this otherwise"); | |
| 1701 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
| 1702 | |
| 1703 // Update the committed mem region. | |
| 1704 _g1_committed.set_end(new_end); | |
| 1705 // Tell the card table about the update. | |
| 1706 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
| 1707 // Tell the BOT about the update. | |
| 1708 _bot_shared->resize(_g1_committed.word_size()); | |
| 1709 } | |
| 1710 | |
|
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1711 bool G1CollectedHeap::expand(size_t expand_bytes) { |
| 342 | 1712 size_t old_mem_size = _g1_storage.committed_size(); |
|
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1713 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1714 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1715 HeapRegion::GrainBytes); | |
|
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1716 ergo_verbose2(ErgoHeapSizing, |
|
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1717 "expand the heap", |
|
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1718 ergo_format_byte("requested expansion amount") |
|
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|
1719 ergo_format_byte("attempted expansion amount"), |
|
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|
1720 expand_bytes, aligned_expand_bytes); |
|
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1721 |
| 3766 | 1722 // First commit the memory. |
| 1723 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
|
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1724 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
|
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|
1725 if (successful) { |
| 3766 | 1726 // Then propagate this update to the necessary data structures. |
| 1727 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
| 1728 update_committed_space(old_end, new_end); | |
| 1729 | |
| 1730 FreeRegionList expansion_list("Local Expansion List"); | |
| 1731 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
| 1732 assert(mr.start() == old_end, "post-condition"); | |
| 1733 // mr might be a smaller region than what was requested if | |
| 1734 // expand_by() was unable to allocate the HeapRegion instances | |
| 1735 assert(mr.end() <= new_end, "post-condition"); | |
| 1736 | |
| 1737 size_t actual_expand_bytes = mr.byte_size(); | |
| 1738 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
| 1739 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
| 1740 "post-condition"); | |
| 1741 if (actual_expand_bytes < aligned_expand_bytes) { | |
| 1742 // We could not expand _hrs to the desired size. In this case we | |
| 1743 // need to shrink the committed space accordingly. | |
| 1744 assert(mr.end() < new_end, "invariant"); | |
| 1745 | |
| 1746 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
| 1747 // First uncommit the memory. | |
| 1748 _g1_storage.shrink_by(diff_bytes); | |
| 1749 // Then propagate this update to the necessary data structures. | |
| 1750 update_committed_space(new_end, mr.end()); | |
|
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|
1751 } |
| 3766 | 1752 _free_list.add_as_tail(&expansion_list); |
|
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1753 |
|
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|
1754 if (_hr_printer.is_active()) { |
|
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1755 HeapWord* curr = mr.start(); |
|
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1756 while (curr < mr.end()) { |
|
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|
1757 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
|
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1758 _hr_printer.commit(curr, curr_end); |
|
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|
1759 curr = curr_end; |
|
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|
1760 } |
|
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1761 assert(curr == mr.end(), "post-condition"); |
|
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|
1762 } |
|
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1763 g1_policy()->record_new_heap_size(n_regions()); |
|
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1764 } else { |
|
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1765 ergo_verbose0(ErgoHeapSizing, |
|
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1766 "did not expand the heap", |
|
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|
1767 ergo_format_reason("heap expansion operation failed")); |
|
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1768 // The expansion of the virtual storage space was unsuccessful. |
|
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1769 // Let's see if it was because we ran out of swap. |
|
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1770 if (G1ExitOnExpansionFailure && |
|
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1771 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
|
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1772 // We had head room... |
|
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1773 vm_exit_out_of_memory(aligned_expand_bytes, "G1 heap expansion"); |
| 342 | 1774 } |
| 1775 } | |
|
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1776 return successful; |
| 342 | 1777 } |
| 1778 | |
| 3766 | 1779 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1780 size_t old_mem_size = _g1_storage.committed_size(); |
| 1781 size_t aligned_shrink_bytes = | |
| 1782 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1783 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1784 HeapRegion::GrainBytes); | |
| 1785 size_t num_regions_deleted = 0; | |
| 3766 | 1786 MemRegion mr = _hrs.shrink_by(aligned_shrink_bytes, &num_regions_deleted); |
| 1787 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
| 1788 assert(mr.end() == old_end, "post-condition"); | |
|
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1789 |
|
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|
1790 ergo_verbose3(ErgoHeapSizing, |
|
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1791 "shrink the heap", |
|
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|
1792 ergo_format_byte("requested shrinking amount") |
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1793 ergo_format_byte("aligned shrinking amount") |
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1794 ergo_format_byte("attempted shrinking amount"), |
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1795 shrink_bytes, aligned_shrink_bytes, mr.byte_size()); |
| 3766 | 1796 if (mr.byte_size() > 0) { |
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1797 if (_hr_printer.is_active()) { |
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1798 HeapWord* curr = mr.end(); |
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1799 while (curr > mr.start()) { |
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1800 HeapWord* curr_end = curr; |
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1801 curr -= HeapRegion::GrainWords; |
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1802 _hr_printer.uncommit(curr, curr_end); |
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1803 } |
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1804 assert(curr == mr.start(), "post-condition"); |
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1805 } |
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1806 |
| 342 | 1807 _g1_storage.shrink_by(mr.byte_size()); |
| 3766 | 1808 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
| 1809 assert(mr.start() == new_end, "post-condition"); | |
| 1810 | |
| 1811 _expansion_regions += num_regions_deleted; | |
| 1812 update_committed_space(old_end, new_end); | |
| 1813 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1814 g1_policy()->record_new_heap_size(n_regions()); |
|
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1815 } else { |
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1816 ergo_verbose0(ErgoHeapSizing, |
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1817 "did not shrink the heap", |
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1818 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1819 } |
| 1820 } | |
| 1821 | |
| 1822 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1823 verify_region_sets_optional(); |
| 1824 | |
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1825 // We should only reach here at the end of a Full GC which means we |
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1826 // should not not be holding to any GC alloc regions. The method |
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1827 // below will make sure of that and do any remaining clean up. |
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1828 abandon_gc_alloc_regions(); |
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1829 |
| 2152 | 1830 // Instead of tearing down / rebuilding the free lists here, we |
| 1831 // could instead use the remove_all_pending() method on free_list to | |
| 1832 // remove only the ones that we need to remove. | |
| 4072 | 1833 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1834 shrink_helper(shrink_bytes); |
| 4072 | 1835 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1836 |
| 3766 | 1837 _hrs.verify_optional(); |
| 2152 | 1838 verify_region_sets_optional(); |
| 342 | 1839 } |
| 1840 | |
| 1841 // Public methods. | |
| 1842 | |
| 1843 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1844 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1845 #endif // _MSC_VER | |
| 1846 | |
| 1847 | |
| 1848 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1849 SharedHeap(policy_), | |
| 1850 _g1_policy(policy_), | |
| 1111 | 1851 _dirty_card_queue_set(false), |
| 1705 | 1852 _into_cset_dirty_card_queue_set(false), |
|
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1853 _is_alive_closure_cm(this), |
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1854 _is_alive_closure_stw(this), |
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1855 _ref_processor_cm(NULL), |
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1856 _ref_processor_stw(NULL), |
| 342 | 1857 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1858 _bot_shared(NULL), | |
| 1859 _objs_with_preserved_marks(NULL), _preserved_marks_of_objs(NULL), | |
| 1860 _evac_failure_scan_stack(NULL) , | |
| 1861 _mark_in_progress(false), | |
| 2152 | 1862 _cg1r(NULL), _summary_bytes_used(0), |
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1863 _g1mm(NULL), |
| 342 | 1864 _refine_cte_cl(NULL), |
| 1865 _full_collection(false), | |
| 2152 | 1866 _free_list("Master Free List"), |
| 1867 _secondary_free_list("Secondary Free List"), | |
| 4072 | 1868 _old_set("Old Set"), |
| 2152 | 1869 _humongous_set("Master Humongous Set"), |
| 1870 _free_regions_coming(false), | |
| 342 | 1871 _young_list(new YoungList(this)), |
| 1872 _gc_time_stamp(0), | |
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1873 _retained_old_gc_alloc_region(NULL), |
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1874 _expand_heap_after_alloc_failure(true), |
| 526 | 1875 _surviving_young_words(NULL), |
|
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1876 _full_collections_completed(0), |
| 526 | 1877 _in_cset_fast_test(NULL), |
|
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1878 _in_cset_fast_test_base(NULL), |
|
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1879 _dirty_cards_region_list(NULL), |
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1880 _worker_cset_start_region(NULL), |
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1881 _worker_cset_start_region_time_stamp(NULL) { |
| 342 | 1882 _g1h = this; // To catch bugs. |
| 1883 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { | |
| 1884 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1885 } | |
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1886 |
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1887 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1888 |
| 342 | 1889 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1890 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1891 | |
| 1892 int n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); | |
| 1893 assert(n_rem_sets > 0, "Invariant."); | |
| 1894 | |
| 1895 HeapRegionRemSetIterator** iter_arr = | |
| 1896 NEW_C_HEAP_ARRAY(HeapRegionRemSetIterator*, n_queues); | |
| 1897 for (int i = 0; i < n_queues; i++) { | |
| 1898 iter_arr[i] = new HeapRegionRemSetIterator(); | |
| 1899 } | |
| 1900 _rem_set_iterator = iter_arr; | |
| 1901 | |
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1902 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues); |
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1903 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues); |
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1904 |
| 342 | 1905 for (int i = 0; i < n_queues; i++) { |
| 1906 RefToScanQueue* q = new RefToScanQueue(); | |
| 1907 q->initialize(); | |
| 1908 _task_queues->register_queue(i, q); | |
| 1909 } | |
| 1910 | |
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1911 clear_cset_start_regions(); |
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1912 |
| 342 | 1913 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1914 } | |
| 1915 | |
| 1916 jint G1CollectedHeap::initialize() { | |
| 1166 | 1917 CollectedHeap::pre_initialize(); |
| 342 | 1918 os::enable_vtime(); |
| 1919 | |
| 1920 // Necessary to satisfy locking discipline assertions. | |
| 1921 | |
| 1922 MutexLocker x(Heap_lock); | |
| 1923 | |
|
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1924 // We have to initialize the printer before committing the heap, as |
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1925 // it will be used then. |
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1926 _hr_printer.set_active(G1PrintHeapRegions); |
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1927 |
| 342 | 1928 // While there are no constraints in the GC code that HeapWordSize |
| 1929 // be any particular value, there are multiple other areas in the | |
| 1930 // system which believe this to be true (e.g. oop->object_size in some | |
| 1931 // cases incorrectly returns the size in wordSize units rather than | |
| 1932 // HeapWordSize). | |
| 1933 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 1934 | |
| 1935 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 1936 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
| 1937 | |
| 1938 // Ensure that the sizes are properly aligned. | |
| 1939 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1940 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1941 | |
| 1942 _cg1r = new ConcurrentG1Refine(); | |
| 1943 | |
| 1944 // Reserve the maximum. | |
| 1945 PermanentGenerationSpec* pgs = collector_policy()->permanent_generation(); | |
| 1946 // Includes the perm-gen. | |
|
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1947 |
|
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1948 // When compressed oops are enabled, the preferred heap base |
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1949 // is calculated by subtracting the requested size from the |
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1950 // 32Gb boundary and using the result as the base address for |
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1951 // heap reservation. If the requested size is not aligned to |
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1952 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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1953 // into the ReservedHeapSpace constructor) then the actual |
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1954 // base of the reserved heap may end up differing from the |
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1955 // address that was requested (i.e. the preferred heap base). |
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1956 // If this happens then we could end up using a non-optimal |
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1957 // compressed oops mode. |
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1958 |
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1959 // Since max_byte_size is aligned to the size of a heap region (checked |
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1960 // above), we also need to align the perm gen size as it might not be. |
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1961 const size_t total_reserved = max_byte_size + |
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1962 align_size_up(pgs->max_size(), HeapRegion::GrainBytes); |
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1963 Universe::check_alignment(total_reserved, HeapRegion::GrainBytes, "g1 heap and perm"); |
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1964 |
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1965 char* addr = Universe::preferred_heap_base(total_reserved, Universe::UnscaledNarrowOop); |
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1966 |
|
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1967 ReservedHeapSpace heap_rs(total_reserved, HeapRegion::GrainBytes, |
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1968 UseLargePages, addr); |
|
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1969 |
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1970 if (UseCompressedOops) { |
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1971 if (addr != NULL && !heap_rs.is_reserved()) { |
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1972 // Failed to reserve at specified address - the requested memory |
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1973 // region is taken already, for example, by 'java' launcher. |
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1974 // Try again to reserver heap higher. |
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1975 addr = Universe::preferred_heap_base(total_reserved, Universe::ZeroBasedNarrowOop); |
|
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1976 |
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1977 ReservedHeapSpace heap_rs0(total_reserved, HeapRegion::GrainBytes, |
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1978 UseLargePages, addr); |
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1979 |
|
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1980 if (addr != NULL && !heap_rs0.is_reserved()) { |
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1981 // Failed to reserve at specified address again - give up. |
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1982 addr = Universe::preferred_heap_base(total_reserved, Universe::HeapBasedNarrowOop); |
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1983 assert(addr == NULL, ""); |
|
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1984 |
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1985 ReservedHeapSpace heap_rs1(total_reserved, HeapRegion::GrainBytes, |
|
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1986 UseLargePages, addr); |
|
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|
1987 heap_rs = heap_rs1; |
|
660978a2a31a
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|
1988 } else { |
|
660978a2a31a
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|
1989 heap_rs = heap_rs0; |
|
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
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diff
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|
1990 } |
|
660978a2a31a
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kvn
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diff
changeset
|
1991 } |
|
660978a2a31a
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|
1992 } |
| 342 | 1993 |
| 1994 if (!heap_rs.is_reserved()) { | |
| 1995 vm_exit_during_initialization("Could not reserve enough space for object heap"); | |
| 1996 return JNI_ENOMEM; | |
| 1997 } | |
| 1998 | |
| 1999 // It is important to do this in a way such that concurrent readers can't | |
| 2000 // temporarily think somethings in the heap. (I've actually seen this | |
| 2001 // happen in asserts: DLD.) | |
| 2002 _reserved.set_word_size(0); | |
| 2003 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 2004 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 2005 | |
| 2006 _expansion_regions = max_byte_size/HeapRegion::GrainBytes; | |
| 2007 | |
| 2008 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 2009 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 2010 set_barrier_set(rem_set()->bs()); | |
| 2011 if (barrier_set()->is_a(BarrierSet::ModRef)) { | |
| 2012 _mr_bs = (ModRefBarrierSet*)_barrier_set; | |
| 2013 } else { | |
| 2014 vm_exit_during_initialization("G1 requires a mod ref bs."); | |
| 2015 return JNI_ENOMEM; | |
| 2016 } | |
| 2017 | |
| 2018 // Also create a G1 rem set. | |
| 1861 | 2019 if (mr_bs()->is_a(BarrierSet::CardTableModRef)) { |
| 2020 _g1_rem_set = new G1RemSet(this, (CardTableModRefBS*)mr_bs()); | |
| 342 | 2021 } else { |
| 1861 | 2022 vm_exit_during_initialization("G1 requires a cardtable mod ref bs."); |
| 2023 return JNI_ENOMEM; | |
| 342 | 2024 } |
| 2025 | |
| 2026 // Carve out the G1 part of the heap. | |
| 2027 | |
| 2028 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
| 2029 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
| 2030 g1_rs.size()/HeapWordSize); | |
| 2031 ReservedSpace perm_gen_rs = heap_rs.last_part(max_byte_size); | |
| 2032 | |
| 2033 _perm_gen = pgs->init(perm_gen_rs, pgs->init_size(), rem_set()); | |
| 2034 | |
| 2035 _g1_storage.initialize(g1_rs, 0); | |
| 2036 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
| 3766 | 2037 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
| 2038 (HeapWord*) _g1_reserved.end(), | |
| 2039 _expansion_regions); | |
| 342 | 2040 |
|
807
d44bdab1c03d
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johnc
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796
diff
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|
2041 // 6843694 - ensure that the maximum region index can fit |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
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|
2042 // in the remembered set structures. |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
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diff
changeset
|
2043 const size_t max_region_idx = ((size_t)1 << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2044 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
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|
2045 |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2046 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
|
2047 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
|
2048 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2049 "too many cards per region"); |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
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|
2050 |
| 2152 | 2051 HeapRegionSet::set_unrealistically_long_length(max_regions() + 1); |
| 2052 | |
| 342 | 2053 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
| 2054 heap_word_size(init_byte_size)); | |
| 2055 | |
| 2056 _g1h = this; | |
| 2057 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
changeset
|
2058 _in_cset_fast_test_length = max_regions(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2059 _in_cset_fast_test_base = NEW_C_HEAP_ARRAY(bool, _in_cset_fast_test_length); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2060 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2061 // We're biasing _in_cset_fast_test to avoid subtracting the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2062 // beginning of the heap every time we want to index; basically |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2063 // it's the same with what we do with the card table. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2064 _in_cset_fast_test = _in_cset_fast_test_base - |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2065 ((size_t) _g1_reserved.start() >> HeapRegion::LogOfHRGrainBytes); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2066 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2067 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2068 // regions to the incremental collection set for the first |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2069 // evacuation pause. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2070 clear_cset_fast_test(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2071 |
| 342 | 2072 // Create the ConcurrentMark data structure and thread. |
| 2073 // (Must do this late, so that "max_regions" is defined.) | |
| 2074 _cm = new ConcurrentMark(heap_rs, (int) max_regions()); | |
| 2075 _cmThread = _cm->cmThread(); | |
| 2076 | |
| 2077 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2078 HeapRegionRemSet::init_heap(max_regions()); | |
| 2079 | |
| 677 | 2080 // Now expand into the initial heap size. |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2081 if (!expand(init_byte_size)) { |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2082 vm_exit_during_initialization("Failed to allocate initial heap."); |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2083 return JNI_ENOMEM; |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2084 } |
| 342 | 2085 |
| 2086 // Perform any initialization actions delegated to the policy. | |
| 2087 g1_policy()->init(); | |
| 2088 | |
| 2089 _refine_cte_cl = | |
| 2090 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
| 2091 g1_rem_set(), | |
| 2092 concurrent_g1_refine()); | |
| 2093 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 2094 | |
| 2095 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2096 SATB_Q_FL_lock, | |
| 1111 | 2097 G1SATBProcessCompletedThreshold, |
| 342 | 2098 Shared_SATB_Q_lock); |
| 794 | 2099 |
| 2100 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
| 2101 DirtyCardQ_FL_lock, | |
| 1111 | 2102 concurrent_g1_refine()->yellow_zone(), |
| 2103 concurrent_g1_refine()->red_zone(), | |
| 794 | 2104 Shared_DirtyCardQ_lock); |
| 2105 | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2106 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2107 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2108 DirtyCardQ_FL_lock, |
| 1111 | 2109 -1, // never trigger processing |
| 2110 -1, // no limit on length | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2111 Shared_DirtyCardQ_lock, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2112 &JavaThread::dirty_card_queue_set()); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2113 } |
| 1705 | 2114 |
| 2115 // Initialize the card queue set used to hold cards containing | |
| 2116 // references into the collection set. | |
| 2117 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
| 2118 DirtyCardQ_FL_lock, | |
| 2119 -1, // never trigger processing | |
| 2120 -1, // no limit on length | |
| 2121 Shared_DirtyCardQ_lock, | |
| 2122 &JavaThread::dirty_card_queue_set()); | |
| 2123 | |
| 342 | 2124 // In case we're keeping closure specialization stats, initialize those |
| 2125 // counts and that mechanism. | |
| 2126 SpecializationStats::clear(); | |
| 2127 | |
| 2128 // Do later initialization work for concurrent refinement. | |
| 2129 _cg1r->init(); | |
| 2130 | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2131 // Here we allocate the dummy full region that is required by the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2132 // 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
|
2133 // space here, lots of asserts fire. |
| 3766 | 2134 |
| 2135 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
| 2136 _g1_reserved.start()); | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2137 // 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
|
2138 // 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
|
2139 // 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
|
2140 // 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
|
2141 dummy_region->set_young(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2142 // Make sure it's full. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2143 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2144 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2145 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2146 init_mutator_alloc_region(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2147 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2148 // Do create of the monitoring and management support so that |
|
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2149 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2150 _g1mm = new G1MonitoringSupport(this); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2151 |
| 342 | 2152 return JNI_OK; |
| 2153 } | |
| 2154 | |
| 2155 void G1CollectedHeap::ref_processing_init() { | |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2156 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2157 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2158 // * There are two reference processor instances. One is |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2159 // used to record and process discovered references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2160 // during concurrent marking; the other is used to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2161 // record and process references during STW pauses |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2162 // (both full and incremental). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2163 // * Both ref processors need to 'span' the entire heap as |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2164 // the regions in the collection set may be dotted around. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2165 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2166 // * For the concurrent marking ref processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2167 // * Reference discovery is enabled at initial marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2168 // * Reference discovery is disabled and the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2169 // references processed etc during remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2170 // * Reference discovery is MT (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2171 // * Reference discovery requires a barrier (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2172 // * Reference processing may or may not be MT |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2173 // (depending on the value of ParallelRefProcEnabled |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2174 // and ParallelGCThreads). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2175 // * A full GC disables reference discovery by the CM |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2176 // ref processor and abandons any entries on it's |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2177 // discovered lists. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2178 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2179 // * For the STW processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2180 // * Non MT discovery is enabled at the start of a full GC. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2181 // * Processing and enqueueing during a full GC is non-MT. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2182 // * During a full GC, references are processed after marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2183 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2184 // * Discovery (may or may not be MT) is enabled at the start |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2185 // of an incremental evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2186 // * References are processed near the end of a STW evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2187 // * For both types of GC: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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|
2188 // * Discovery is atomic - i.e. not concurrent. |
|
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parents:
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|
2189 // * Reference discovery will not need a barrier. |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
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1973
diff
changeset
|
2190 |
| 342 | 2191 SharedHeap::ref_processing_init(); |
| 2192 MemRegion mr = reserved_region(); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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|
2193 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
2194 // Concurrent Mark ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2195 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
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2361
diff
changeset
|
2196 new ReferenceProcessor(mr, // span |
|
3979
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|
2197 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
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|
2198 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2199 (int) ParallelGCThreads, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2200 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
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|
2201 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
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|
2202 // mt discovery |
|
4dfb2df418f2
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|
2203 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2204 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 false, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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3973
diff
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|
2206 // Reference discovery is not atomic |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
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|
2207 &_is_alive_closure_cm, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2208 // is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2209 // (for efficiency/performance) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2210 true); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 // Setting next fields of discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // lists requires a barrier. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 // STW ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 _ref_processor_stw = |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 new ReferenceProcessor(mr, // span |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2217 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2218 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2219 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2220 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2221 (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 // mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2223 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2224 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2225 true, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2226 // Reference discovery is atomic |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2227 &_is_alive_closure_stw, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2228 // is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2229 // (for efficiency/performance) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2230 false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2231 // Setting next fields of discovered |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2232 // lists requires a barrier. |
| 342 | 2233 } |
| 2234 | |
| 2235 size_t G1CollectedHeap::capacity() const { | |
| 2236 return _g1_committed.byte_size(); | |
| 2237 } | |
| 2238 | |
| 1705 | 2239 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2240 DirtyCardQueue* into_cset_dcq, | |
| 2241 bool concurrent, | |
| 342 | 2242 int worker_i) { |
| 889 | 2243 // Clean cards in the hot card cache |
| 1705 | 2244 concurrent_g1_refine()->clean_up_cache(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2245 |
| 342 | 2246 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2247 int n_completed_buffers = 0; | |
| 1705 | 2248 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2249 n_completed_buffers++; |
| 2250 } | |
| 2251 g1_policy()->record_update_rs_processed_buffers(worker_i, | |
| 2252 (double) n_completed_buffers); | |
| 2253 dcqs.clear_n_completed_buffers(); | |
| 2254 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2255 } | |
| 2256 | |
| 2257 | |
| 2258 // Computes the sum of the storage used by the various regions. | |
| 2259 | |
| 2260 size_t G1CollectedHeap::used() const { | |
|
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2261 assert(Heap_lock->owner() != NULL, |
|
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2262 "Should be owned on this thread's behalf."); |
| 342 | 2263 size_t result = _summary_bytes_used; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2264 // 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
|
2265 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2266 if (hr != NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2267 result += hr->used(); |
| 342 | 2268 return result; |
| 2269 } | |
| 2270 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2271 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
|
2272 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
|
2273 return result; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2274 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2275 |
| 342 | 2276 class SumUsedClosure: public HeapRegionClosure { |
| 2277 size_t _used; | |
| 2278 public: | |
| 2279 SumUsedClosure() : _used(0) {} | |
| 2280 bool doHeapRegion(HeapRegion* r) { | |
| 2281 if (!r->continuesHumongous()) { | |
| 2282 _used += r->used(); | |
| 2283 } | |
| 2284 return false; | |
| 2285 } | |
| 2286 size_t result() { return _used; } | |
| 2287 }; | |
| 2288 | |
| 2289 size_t G1CollectedHeap::recalculate_used() const { | |
| 2290 SumUsedClosure blk; | |
| 3766 | 2291 heap_region_iterate(&blk); |
| 342 | 2292 return blk.result(); |
| 2293 } | |
| 2294 | |
| 2295 size_t G1CollectedHeap::unsafe_max_alloc() { | |
| 2152 | 2296 if (free_regions() > 0) return HeapRegion::GrainBytes; |
| 342 | 2297 // otherwise, is there space in the current allocation region? |
| 2298 | |
| 2299 // We need to store the current allocation region in a local variable | |
| 2300 // here. The problem is that this method doesn't take any locks and | |
| 2301 // there may be other threads which overwrite the current allocation | |
| 2302 // region field. attempt_allocation(), for example, sets it to NULL | |
| 2303 // and this can happen *after* the NULL check here but before the call | |
| 2304 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
| 2305 // to be a problem in the optimized build, since the two loads of the | |
| 2306 // current allocation region field are optimized away. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2307 HeapRegion* hr = _mutator_alloc_region.get(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2308 if (hr == NULL) { |
| 342 | 2309 return 0; |
| 2310 } | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2311 return hr->free(); |
| 342 | 2312 } |
| 2313 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2314 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
|
2315 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2316 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
|
2317 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
|
2318 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
|
2319 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2320 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2321 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2322 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2323 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2324 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2325 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2326 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2327 // 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
|
2328 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2329 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2330 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2331 // 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
|
2332 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2333 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2334 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2335 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2336 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2337 // 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
|
2338 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2339 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2340 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2341 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2342 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2343 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2344 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2345 void G1CollectedHeap::increment_full_collections_completed(bool concurrent) { |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2346 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2347 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2348 // 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
|
2349 // 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
|
2350 // 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
|
2351 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2352 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2353 // We have already incremented _total_full_collections at the start |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2354 // of the GC, so total_full_collections() represents how many full |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2355 // collections have been started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2356 unsigned int full_collections_started = total_full_collections(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2357 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2358 // 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
|
2359 // 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
|
2360 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2361 // 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
|
2362 // nesting) or two (when a Full GC interrupted a concurrent cycle) |
|
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2363 // behind the number of full collections started. |
|
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|
2364 |
|
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|
2365 // 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)
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|
2366 assert(concurrent || |
|
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|
2367 (full_collections_started == _full_collections_completed + 1) || |
|
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|
2368 (full_collections_started == _full_collections_completed + 2), |
|
2030
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|
2369 err_msg("for inner caller (Full GC): full_collections_started = %u " |
|
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|
2370 "is inconsistent with _full_collections_completed = %u", |
|
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|
2371 full_collections_started, _full_collections_completed)); |
|
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|
2372 |
|
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|
2373 // This is the case for the outer caller, i.e. the concurrent cycle. |
|
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|
2374 assert(!concurrent || |
|
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|
2375 (full_collections_started == _full_collections_completed + 1), |
|
2030
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|
2376 err_msg("for outer caller (concurrent cycle): " |
|
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|
2377 "full_collections_started = %u " |
|
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|
2378 "is inconsistent with _full_collections_completed = %u", |
|
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|
2379 full_collections_started, _full_collections_completed)); |
|
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|
2380 |
|
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|
2381 _full_collections_completed += 1; |
|
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|
2382 |
|
1840
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|
2383 // We need to clear the "in_progress" flag in the CM thread before |
|
4e0094bc41fa
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|
2384 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
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|
2385 // is set) so that if a waiter requests another System.gc() it doesn't |
|
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|
2386 // incorrectly see that a marking cyle is still in progress. |
|
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|
2387 if (concurrent) { |
|
1840
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|
2388 _cmThread->clear_in_progress(); |
|
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|
2389 } |
|
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|
2390 |
|
1656
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|
2391 // This notify_all() will ensure that a thread that called |
|
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|
2392 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
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|
2393 // and it's waiting for a full GC to finish will be woken up. It is |
|
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|
2394 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
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|
2395 FullGCCount_lock->notify_all(); |
|
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|
2396 } |
|
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|
2397 |
| 342 | 2398 void G1CollectedHeap::collect_as_vm_thread(GCCause::Cause cause) { |
| 2152 | 2399 assert_at_safepoint(true /* should_be_vm_thread */); |
| 342 | 2400 GCCauseSetter gcs(this, cause); |
| 2401 switch (cause) { | |
| 2402 case GCCause::_heap_inspection: | |
| 2403 case GCCause::_heap_dump: { | |
| 2404 HandleMark hm; | |
| 2405 do_full_collection(false); // don't clear all soft refs | |
| 2406 break; | |
| 2407 } | |
| 2408 default: // XXX FIX ME | |
| 2409 ShouldNotReachHere(); // Unexpected use of this function | |
| 2410 } | |
| 2411 } | |
| 2412 | |
|
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|
2413 void G1CollectedHeap::collect(GCCause::Cause cause) { |
|
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|
2414 assert_heap_not_locked(); |
|
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|
2415 |
|
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|
2416 unsigned int gc_count_before; |
|
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|
2417 unsigned int full_gc_count_before; |
|
4910
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|
2418 bool retry_gc; |
|
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|
2419 |
|
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|
2420 do { |
|
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|
2421 retry_gc = false; |
|
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|
2422 |
|
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|
2423 { |
|
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|
2424 MutexLocker ml(Heap_lock); |
|
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|
2425 |
|
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|
2426 // Read the GC count while holding the Heap_lock |
|
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|
2427 gc_count_before = total_collections(); |
|
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|
2428 full_gc_count_before = total_full_collections(); |
|
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|
2429 } |
|
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|
2430 |
|
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|
2431 if (should_do_concurrent_full_gc(cause)) { |
|
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|
2432 // Schedule an initial-mark evacuation pause that will start a |
|
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|
2433 // concurrent cycle. We're setting word_size to 0 which means that |
|
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|
2434 // we are not requesting a post-GC allocation. |
|
1656
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|
2435 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2436 0, /* word_size */ |
|
4910
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|
2437 true, /* should_initiate_conc_mark */ |
|
1656
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|
2438 g1_policy()->max_pause_time_ms(), |
|
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|
2439 cause); |
|
1088
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|
2440 VMThread::execute(&op); |
|
4910
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|
2441 if (!op.pause_succeeded()) { |
|
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|
2442 // Another GC got scheduled and prevented us from scheduling |
|
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|
2443 // the initial-mark GC. It's unlikely that the GC that |
|
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|
2444 // pre-empted us was also an initial-mark GC. So, we'll retry |
|
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|
2445 // the initial-mark GC. |
|
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|
2446 |
|
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|
2447 if (full_gc_count_before == total_full_collections()) { |
|
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|
2448 retry_gc = true; |
|
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|
2449 } else { |
|
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|
2450 // A Full GC happened while we were trying to schedule the |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
2451 // initial-mark GC. No point in starting a new cycle given |
|
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changeset
|
2452 // that the whole heap was collected anyway. |
|
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|
2453 } |
|
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|
2454 } |
|
1656
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|
2455 } else { |
|
4910
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|
2456 if (cause == GCCause::_gc_locker |
|
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|
2457 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
caa4652b4414
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|
2458 |
|
caa4652b4414
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changeset
|
2459 // Schedule a standard evacuation pause. We're setting word_size |
|
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|
2460 // to 0 which means that we are not requesting a post-GC allocation. |
|
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|
2461 VM_G1IncCollectionPause op(gc_count_before, |
|
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|
2462 0, /* word_size */ |
|
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|
2463 false, /* should_initiate_conc_mark */ |
|
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|
2464 g1_policy()->max_pause_time_ms(), |
|
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|
2465 cause); |
|
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|
2466 VMThread::execute(&op); |
|
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|
2467 } else { |
|
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|
2468 // Schedule a Full GC. |
|
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|
2469 VM_G1CollectFull op(gc_count_before, full_gc_count_before, cause); |
|
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|
2470 VMThread::execute(&op); |
|
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|
2471 } |
|
1088
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|
2472 } |
|
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|
2473 } while (retry_gc); |
| 342 | 2474 } |
| 2475 | |
| 2476 bool G1CollectedHeap::is_in(const void* p) const { | |
| 4708 | 2477 if (_g1_committed.contains(p)) { |
| 2478 // Given that we know that p is in the committed space, | |
| 2479 // heap_region_containing_raw() should successfully | |
| 2480 // return the containing region. | |
| 2481 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2482 return hr->is_in(p); |
| 2483 } else { | |
| 2484 return _perm_gen->as_gen()->is_in(p); | |
| 2485 } | |
| 2486 } | |
| 2487 | |
| 2488 // Iteration functions. | |
| 2489 | |
| 2490 // Iterates an OopClosure over all ref-containing fields of objects | |
| 2491 // within a HeapRegion. | |
| 2492 | |
| 2493 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
| 2494 MemRegion _mr; | |
| 2495 OopClosure* _cl; | |
| 2496 public: | |
| 2497 IterateOopClosureRegionClosure(MemRegion mr, OopClosure* cl) | |
| 2498 : _mr(mr), _cl(cl) {} | |
| 2499 bool doHeapRegion(HeapRegion* r) { | |
| 2500 if (! r->continuesHumongous()) { | |
| 2501 r->oop_iterate(_cl); | |
| 2502 } | |
| 2503 return false; | |
| 2504 } | |
| 2505 }; | |
| 2506 | |
| 678 | 2507 void G1CollectedHeap::oop_iterate(OopClosure* cl, bool do_perm) { |
| 342 | 2508 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
| 3766 | 2509 heap_region_iterate(&blk); |
| 678 | 2510 if (do_perm) { |
| 2511 perm_gen()->oop_iterate(cl); | |
| 2512 } | |
| 342 | 2513 } |
| 2514 | |
| 678 | 2515 void G1CollectedHeap::oop_iterate(MemRegion mr, OopClosure* cl, bool do_perm) { |
| 342 | 2516 IterateOopClosureRegionClosure blk(mr, cl); |
| 3766 | 2517 heap_region_iterate(&blk); |
| 678 | 2518 if (do_perm) { |
| 2519 perm_gen()->oop_iterate(cl); | |
| 2520 } | |
| 342 | 2521 } |
| 2522 | |
| 2523 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2524 | |
| 2525 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2526 ObjectClosure* _cl; | |
| 2527 public: | |
| 2528 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2529 bool doHeapRegion(HeapRegion* r) { | |
| 2530 if (! r->continuesHumongous()) { | |
| 2531 r->object_iterate(_cl); | |
| 2532 } | |
| 2533 return false; | |
| 2534 } | |
| 2535 }; | |
| 2536 | |
| 678 | 2537 void G1CollectedHeap::object_iterate(ObjectClosure* cl, bool do_perm) { |
| 342 | 2538 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2539 heap_region_iterate(&blk); |
| 678 | 2540 if (do_perm) { |
| 2541 perm_gen()->object_iterate(cl); | |
| 2542 } | |
| 342 | 2543 } |
| 2544 | |
| 2545 void G1CollectedHeap::object_iterate_since_last_GC(ObjectClosure* cl) { | |
| 2546 // FIXME: is this right? | |
| 2547 guarantee(false, "object_iterate_since_last_GC not supported by G1 heap"); | |
| 2548 } | |
| 2549 | |
| 2550 // Calls a SpaceClosure on a HeapRegion. | |
| 2551 | |
| 2552 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2553 SpaceClosure* _cl; | |
| 2554 public: | |
| 2555 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2556 bool doHeapRegion(HeapRegion* r) { | |
| 2557 _cl->do_space(r); | |
| 2558 return false; | |
| 2559 } | |
| 2560 }; | |
| 2561 | |
| 2562 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2563 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2564 heap_region_iterate(&blk); |
| 342 | 2565 } |
| 2566 | |
| 3766 | 2567 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
| 2568 _hrs.iterate(cl); | |
| 342 | 2569 } |
| 2570 | |
| 2571 void G1CollectedHeap::heap_region_iterate_from(HeapRegion* r, | |
| 3766 | 2572 HeapRegionClosure* cl) const { |
| 2573 _hrs.iterate_from(r, cl); | |
| 342 | 2574 } |
| 2575 | |
| 2576 void | |
| 2577 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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2578 uint worker, |
|
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|
2579 uint no_of_par_workers, |
| 342 | 2580 jint claim_value) { |
| 355 | 2581 const size_t regions = n_regions(); |
|
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2582 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
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|
2583 no_of_par_workers : |
|
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|
2584 1); |
|
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|
2585 assert(UseDynamicNumberOfGCThreads || |
|
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2586 no_of_par_workers == workers()->total_workers(), |
|
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|
2587 "Non dynamic should use fixed number of workers"); |
| 355 | 2588 // try to spread out the starting points of the workers |
|
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2589 const size_t start_index = regions / max_workers * (size_t) worker; |
| 355 | 2590 |
| 2591 // each worker will actually look at all regions | |
| 2592 for (size_t count = 0; count < regions; ++count) { | |
| 2593 const size_t index = (start_index + count) % regions; | |
| 2594 assert(0 <= index && index < regions, "sanity"); | |
| 2595 HeapRegion* r = region_at(index); | |
| 2596 // we'll ignore "continues humongous" regions (we'll process them | |
| 2597 // when we come across their corresponding "start humongous" | |
| 2598 // region) and regions already claimed | |
| 2599 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
| 2600 continue; | |
| 2601 } | |
| 2602 // OK, try to claim it | |
| 342 | 2603 if (r->claimHeapRegion(claim_value)) { |
| 355 | 2604 // success! |
| 2605 assert(!r->continuesHumongous(), "sanity"); | |
| 2606 if (r->startsHumongous()) { | |
| 2607 // If the region is "starts humongous" we'll iterate over its | |
| 2608 // "continues humongous" first; in fact we'll do them | |
| 2609 // first. The order is important. In on case, calling the | |
| 2610 // closure on the "starts humongous" region might de-allocate | |
| 2611 // and clear all its "continues humongous" regions and, as a | |
| 2612 // result, we might end up processing them twice. So, we'll do | |
| 2613 // them first (notice: most closures will ignore them anyway) and | |
| 2614 // then we'll do the "starts humongous" region. | |
| 2615 for (size_t ch_index = index + 1; ch_index < regions; ++ch_index) { | |
| 2616 HeapRegion* chr = region_at(ch_index); | |
| 2617 | |
| 2618 // if the region has already been claimed or it's not | |
| 2619 // "continues humongous" we're done | |
| 2620 if (chr->claim_value() == claim_value || | |
| 2621 !chr->continuesHumongous()) { | |
| 2622 break; | |
| 2623 } | |
| 2624 | |
| 2625 // Noone should have claimed it directly. We can given | |
| 2626 // that we claimed its "starts humongous" region. | |
| 2627 assert(chr->claim_value() != claim_value, "sanity"); | |
| 2628 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2629 | |
| 2630 if (chr->claimHeapRegion(claim_value)) { | |
| 2631 // we should always be able to claim it; noone else should | |
| 2632 // be trying to claim this region | |
| 2633 | |
| 2634 bool res2 = cl->doHeapRegion(chr); | |
| 2635 assert(!res2, "Should not abort"); | |
| 2636 | |
| 2637 // Right now, this holds (i.e., no closure that actually | |
| 2638 // does something with "continues humongous" regions | |
| 2639 // clears them). We might have to weaken it in the future, | |
| 2640 // but let's leave these two asserts here for extra safety. | |
| 2641 assert(chr->continuesHumongous(), "should still be the case"); | |
| 2642 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2643 } else { | |
| 2644 guarantee(false, "we should not reach here"); | |
| 2645 } | |
| 2646 } | |
| 2647 } | |
| 2648 | |
| 2649 assert(!r->continuesHumongous(), "sanity"); | |
| 2650 bool res = cl->doHeapRegion(r); | |
| 2651 assert(!res, "Should not abort"); | |
| 2652 } | |
| 2653 } | |
| 2654 } | |
| 2655 | |
| 390 | 2656 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2657 public: | |
| 2658 bool doHeapRegion(HeapRegion* r) { | |
| 2659 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2660 return false; | |
| 2661 } | |
| 2662 }; | |
| 2663 | |
|
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|
2664 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2665 ResetClaimValuesClosure blk; |
| 2666 heap_region_iterate(&blk); | |
| 2667 } | |
| 2668 | |
|
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2669 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
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|
2670 ResetClaimValuesClosure blk; |
|
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|
2671 collection_set_iterate(&blk); |
|
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|
2672 } |
|
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|
2673 |
| 355 | 2674 #ifdef ASSERT |
| 2675 // This checks whether all regions in the heap have the correct claim | |
| 2676 // value. I also piggy-backed on this a check to ensure that the | |
| 2677 // humongous_start_region() information on "continues humongous" | |
| 2678 // regions is correct. | |
| 2679 | |
| 2680 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2681 private: | |
| 2682 jint _claim_value; | |
| 2683 size_t _failures; | |
| 2684 HeapRegion* _sh_region; | |
| 2685 public: | |
| 2686 CheckClaimValuesClosure(jint claim_value) : | |
| 2687 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2688 bool doHeapRegion(HeapRegion* r) { | |
| 2689 if (r->claim_value() != _claim_value) { | |
|
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|
2690 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2691 "claim value = %d, should be %d", |
|
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|
2692 HR_FORMAT_PARAMS(r), |
|
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|
2693 r->claim_value(), _claim_value); |
| 355 | 2694 ++_failures; |
| 2695 } | |
| 2696 if (!r->isHumongous()) { | |
| 2697 _sh_region = NULL; | |
| 2698 } else if (r->startsHumongous()) { | |
| 2699 _sh_region = r; | |
| 2700 } else if (r->continuesHumongous()) { | |
| 2701 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2702 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2703 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2704 HR_FORMAT_PARAMS(r), |
| 355 | 2705 r->humongous_start_region(), |
| 2706 _sh_region); | |
| 2707 ++_failures; | |
| 342 | 2708 } |
| 2709 } | |
| 355 | 2710 return false; |
| 2711 } | |
| 2712 size_t failures() { | |
| 2713 return _failures; | |
| 2714 } | |
| 2715 }; | |
| 2716 | |
| 2717 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2718 CheckClaimValuesClosure cl(claim_value); | |
| 2719 heap_region_iterate(&cl); | |
| 2720 return cl.failures() == 0; | |
| 2721 } | |
|
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|
2722 |
|
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|
2723 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
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|
2724 jint _claim_value; |
|
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|
2725 size_t _failures; |
|
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|
2726 |
|
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|
2727 public: |
|
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|
2728 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
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|
2729 _claim_value(claim_value), |
|
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|
2730 _failures(0) { } |
|
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|
2731 |
|
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|
2732 size_t failures() { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2733 return _failures; |
|
dc467e8b2c5e
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|
2734 } |
|
dc467e8b2c5e
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|
2735 |
|
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|
2736 bool doHeapRegion(HeapRegion* hr) { |
|
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|
2737 assert(hr->in_collection_set(), "how?"); |
|
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|
2738 assert(!hr->isHumongous(), "H-region in CSet"); |
|
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|
2739 if (hr->claim_value() != _claim_value) { |
|
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|
2740 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
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|
2741 "claim value = %d, should be %d", |
|
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|
2742 HR_FORMAT_PARAMS(hr), |
|
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|
2743 hr->claim_value(), _claim_value); |
|
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|
2744 _failures += 1; |
|
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|
2745 } |
|
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|
2746 return false; |
|
dc467e8b2c5e
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|
2747 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2748 }; |
|
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|
2749 |
|
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|
2750 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
dc467e8b2c5e
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|
2751 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2752 collection_set_iterate(&cl); |
|
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|
2753 return cl.failures() == 0; |
|
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|
2754 } |
| 355 | 2755 #endif // ASSERT |
| 342 | 2756 |
|
4709
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2757 // Clear the cached CSet starting regions and (more importantly) |
|
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|
2758 // the time stamps. Called when we reset the GC time stamp. |
|
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|
2759 void G1CollectedHeap::clear_cset_start_regions() { |
|
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2760 assert(_worker_cset_start_region != NULL, "sanity"); |
|
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|
2761 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
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|
2762 |
|
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|
2763 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
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|
2764 for (int i = 0; i < n_queues; i++) { |
|
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|
2765 _worker_cset_start_region[i] = NULL; |
|
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|
2766 _worker_cset_start_region_time_stamp[i] = 0; |
|
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|
2767 } |
|
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|
2768 } |
|
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|
2769 |
|
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|
2770 // Given the id of a worker, obtain or calculate a suitable |
|
fd2b426c30db
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|
2771 // starting region for iterating over the current collection set. |
|
4097
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|
2772 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(int worker_i) { |
|
4709
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|
2773 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
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|
2774 |
|
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|
2775 HeapRegion* result = NULL; |
|
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|
2776 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
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|
2777 |
|
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|
2778 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
|
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|
2779 // Cached starting region for current worker was set |
|
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|
2780 // during the current pause - so it's valid. |
|
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|
2781 // Note: the cached starting heap region may be NULL |
|
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|
2782 // (when the collection set is empty). |
|
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changeset
|
2783 result = _worker_cset_start_region[worker_i]; |
|
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|
2784 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
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|
2785 return result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2786 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2787 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2788 // The cached entry was not valid so let's calculate |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2789 // a suitable starting heap region for this worker. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2790 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2791 // We want the parallel threads to start their collection |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2792 // set iteration at different collection set regions to |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2793 // avoid contention. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2794 // If we have: |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2795 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2796 // p threads |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2797 // 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
|
2798 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2799 result = g1_policy()->collection_set(); |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2800 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2801 size_t 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
|
2802 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
|
2803 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2804 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2805 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2806 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2807 size_t end_ind = (cs_size * worker_i) / active_workers; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2808 size_t start_ind = 0; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2809 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2810 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2811 _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
|
2812 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2813 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2814 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
|
2815 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
|
2816 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2817 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2818 for (size_t i = start_ind; i < end_ind; i++) { |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2819 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2820 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2821 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2822 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2823 // 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
|
2824 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2825 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
|
2826 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
|
2827 "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
|
2828 _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
|
2829 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2830 _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
|
2831 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2832 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2833 |
| 342 | 2834 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2835 HeapRegion* r = g1_policy()->collection_set(); | |
| 2836 while (r != NULL) { | |
| 2837 HeapRegion* next = r->next_in_collection_set(); | |
| 2838 if (cl->doHeapRegion(r)) { | |
| 2839 cl->incomplete(); | |
| 2840 return; | |
| 2841 } | |
| 2842 r = next; | |
| 2843 } | |
| 2844 } | |
| 2845 | |
| 2846 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2847 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2848 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2849 // 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
|
2850 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2851 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2852 |
| 342 | 2853 assert(r->in_collection_set(), |
| 2854 "Start region must be a member of the collection set."); | |
| 2855 HeapRegion* cur = r; | |
| 2856 while (cur != NULL) { | |
| 2857 HeapRegion* next = cur->next_in_collection_set(); | |
| 2858 if (cl->doHeapRegion(cur) && false) { | |
| 2859 cl->incomplete(); | |
| 2860 return; | |
| 2861 } | |
| 2862 cur = next; | |
| 2863 } | |
| 2864 cur = g1_policy()->collection_set(); | |
| 2865 while (cur != r) { | |
| 2866 HeapRegion* next = cur->next_in_collection_set(); | |
| 2867 if (cl->doHeapRegion(cur) && false) { | |
| 2868 cl->incomplete(); | |
| 2869 return; | |
| 2870 } | |
| 2871 cur = next; | |
| 2872 } | |
| 2873 } | |
| 2874 | |
| 2875 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
| 3766 | 2876 return n_regions() > 0 ? region_at(0) : NULL; |
| 342 | 2877 } |
| 2878 | |
| 2879 | |
| 2880 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
| 2881 Space* res = heap_region_containing(addr); | |
| 2882 if (res == NULL) | |
| 2883 res = perm_gen()->space_containing(addr); | |
| 2884 return res; | |
| 2885 } | |
| 2886 | |
| 2887 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2888 Space* sp = space_containing(addr); | |
| 2889 if (sp != NULL) { | |
| 2890 return sp->block_start(addr); | |
| 2891 } | |
| 2892 return NULL; | |
| 2893 } | |
| 2894 | |
| 2895 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 2896 Space* sp = space_containing(addr); | |
| 2897 assert(sp != NULL, "block_size of address outside of heap"); | |
| 2898 return sp->block_size(addr); | |
| 2899 } | |
| 2900 | |
| 2901 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 2902 Space* sp = space_containing(addr); | |
| 2903 return sp->block_is_obj(addr); | |
| 2904 } | |
| 2905 | |
| 2906 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 2907 return true; | |
| 2908 } | |
| 2909 | |
| 2910 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 2911 return HeapRegion::GrainBytes; | |
| 2912 } | |
| 2913 | |
| 2914 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 2915 // Return the remaining space in the cur alloc region, but not less than | |
| 2916 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2917 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2918 // Also, this value can be at most the humongous object threshold, |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2919 // since we can't allow tlabs to grow big enough to accomodate |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2920 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2921 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2922 HeapRegion* hr = _mutator_alloc_region.get(); |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2923 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
|
2924 if (hr == NULL) { |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2925 return max_tlab_size; |
| 342 | 2926 } else { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2927 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab_size); |
| 342 | 2928 } |
| 2929 } | |
| 2930 | |
| 2931 size_t G1CollectedHeap::max_capacity() const { | |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2932 return _g1_reserved.byte_size(); |
| 342 | 2933 } |
| 2934 | |
| 2935 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 2936 // assert(false, "NYI"); | |
| 2937 return 0; | |
| 2938 } | |
| 2939 | |
| 2940 void G1CollectedHeap::prepare_for_verify() { | |
| 2941 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 2942 ensure_parsability(false); | |
| 2943 } | |
| 2944 g1_rem_set()->prepare_for_verify(); | |
| 2945 } | |
| 2946 | |
| 2947 class VerifyLivenessOopClosure: public OopClosure { | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2948 G1CollectedHeap* _g1h; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2949 VerifyOption _vo; |
| 342 | 2950 public: |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2951 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2952 _g1h(g1h), _vo(vo) |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2953 { } |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2954 void do_oop(narrowOop *p) { do_oop_work(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2955 void do_oop( oop *p) { do_oop_work(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2956 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2957 template <class T> void do_oop_work(T *p) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2958 oop obj = oopDesc::load_decode_heap_oop(p); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2959 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2960 "Dead object referenced by a not dead object"); |
| 342 | 2961 } |
| 2962 }; | |
| 2963 | |
| 2964 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 2965 private: |
| 342 | 2966 G1CollectedHeap* _g1h; |
| 2967 size_t _live_bytes; | |
| 2968 HeapRegion *_hr; | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2969 VerifyOption _vo; |
| 342 | 2970 public: |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2971 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2972 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2973 // _vo == UseMarkWord -> use mark word from object header. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2974 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2975 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 2976 _g1h = G1CollectedHeap::heap(); |
| 2977 } | |
| 2978 void do_object(oop o) { | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2979 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 2980 assert(o != NULL, "Huh?"); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2981 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2982 // If the object is alive according to the mark word, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2983 // then verify that the marking information agrees. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2984 // Note we can't verify the contra-positive of the |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2985 // above: if the object is dead (according to the mark |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2986 // word), it may not be marked, or may have been marked |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2987 // but has since became dead, or may have been allocated |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2988 // since the last marking. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2989 if (_vo == VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2990 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
|
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|
2991 } |
|
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2992 |
| 342 | 2993 o->oop_iterate(&isLive); |
|
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|
2994 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
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2995 size_t obj_size = o->size(); // Make sure we don't overflow |
|
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2996 _live_bytes += (obj_size * HeapWordSize); |
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|
2997 } |
| 342 | 2998 } |
| 2999 } | |
| 3000 size_t live_bytes() { return _live_bytes; } | |
| 3001 }; | |
| 3002 | |
| 3003 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3004 HeapRegion *_hr; | |
| 3005 G1CollectedHeap *_g1; | |
| 3006 public: | |
| 3007 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3008 _g1 = G1CollectedHeap::heap(); | |
| 3009 }; | |
| 3010 | |
| 3011 void do_object(oop o) { | |
| 3012 if (o != NULL) { | |
| 3013 HeapWord *start = (HeapWord *) o; | |
| 3014 size_t word_sz = o->size(); | |
| 3015 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3016 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3017 (void*) o, word_sz, | |
| 3018 _g1->isMarkedPrev(o), | |
| 3019 _g1->isMarkedNext(o), | |
| 3020 _hr->obj_allocated_since_prev_marking(o)); | |
| 3021 HeapWord *end = start + word_sz; | |
| 3022 HeapWord *cur; | |
| 3023 int *val; | |
| 3024 for (cur = start; cur < end; cur++) { | |
| 3025 val = (int *) cur; | |
| 3026 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3027 } | |
| 3028 } | |
| 3029 } | |
| 3030 }; | |
| 3031 | |
| 3032 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3033 private: |
|
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|
3034 bool _allow_dirty; |
|
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|
3035 bool _par; |
|
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|
3036 VerifyOption _vo; |
|
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|
3037 bool _failures; |
| 811 | 3038 public: |
|
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3039 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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3040 // _vo == UseNextMarking -> use "next" marking information, |
|
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3041 // _vo == UseMarkWord -> use mark word from object header. |
|
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|
3042 VerifyRegionClosure(bool allow_dirty, bool par, VerifyOption vo) |
|
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3043 : _allow_dirty(allow_dirty), |
|
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|
3044 _par(par), |
|
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|
3045 _vo(vo), |
|
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|
3046 _failures(false) {} |
|
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|
3047 |
|
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|
3048 bool failures() { |
|
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|
3049 return _failures; |
|
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|
3050 } |
|
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|
3051 |
| 342 | 3052 bool doHeapRegion(HeapRegion* r) { |
| 390 | 3053 guarantee(_par || r->claim_value() == HeapRegion::InitialClaimValue, |
| 3054 "Should be unclaimed at verify points."); | |
|
637
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|
3055 if (!r->continuesHumongous()) { |
|
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|
3056 bool failures = false; |
|
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|
3057 r->verify(_allow_dirty, _vo, &failures); |
|
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|
3058 if (failures) { |
|
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|
3059 _failures = true; |
|
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|
3060 } else { |
|
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|
3061 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
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|
3062 r->object_iterate(¬_dead_yet_cl); |
|
4787
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|
3063 if (_vo != VerifyOption_G1UseNextMarking) { |
|
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|
3064 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
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|
3065 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
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|
3066 "max_live_bytes "SIZE_FORMAT" " |
|
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|
3067 "< calculated "SIZE_FORMAT, |
|
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|
3068 r->bottom(), r->end(), |
|
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|
3069 r->max_live_bytes(), |
|
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|
3070 not_dead_yet_cl.live_bytes()); |
|
4787
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|
3071 _failures = true; |
|
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changeset
|
3072 } |
|
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|
3073 } else { |
|
2ace1c4ee8da
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changeset
|
3074 // When vo == UseNextMarking we cannot currently do a sanity |
|
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|
3075 // check on the live bytes as the calculation has not been |
|
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|
3076 // finalized yet. |
|
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|
3077 } |
|
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|
3078 } |
| 342 | 3079 } |
|
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|
3080 return false; // stop the region iteration if we hit a failure |
| 342 | 3081 } |
| 3082 }; | |
| 3083 | |
| 3084 class VerifyRootsClosure: public OopsInGenClosure { | |
| 3085 private: | |
| 3086 G1CollectedHeap* _g1h; | |
|
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|
3087 VerifyOption _vo; |
| 342 | 3088 bool _failures; |
| 3089 public: | |
|
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changeset
|
3090 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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changeset
|
3091 // _vo == UseNextMarking -> use "next" marking information, |
|
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changeset
|
3092 // _vo == UseMarkWord -> use mark word from object header. |
|
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|
3093 VerifyRootsClosure(VerifyOption vo) : |
|
845
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|
3094 _g1h(G1CollectedHeap::heap()), |
|
3772
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changeset
|
3095 _vo(vo), |
|
1020
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changeset
|
3096 _failures(false) { } |
| 342 | 3097 |
| 3098 bool failures() { return _failures; } | |
| 3099 | |
|
845
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diff
changeset
|
3100 template <class T> void do_oop_nv(T* p) { |
|
df6caf649ff7
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diff
changeset
|
3101 T heap_oop = oopDesc::load_heap_oop(p); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
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|
3102 if (!oopDesc::is_null(heap_oop)) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
changeset
|
3103 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
3772
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diff
changeset
|
3104 if (_g1h->is_obj_dead_cond(obj, _vo)) { |
| 342 | 3105 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " |
|
1020
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diff
changeset
|
3106 "points to dead obj "PTR_FORMAT, p, (void*) obj); |
|
3772
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changeset
|
3107 if (_vo == VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
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changeset
|
3108 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); |
|
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changeset
|
3109 } |
| 342 | 3110 obj->print_on(gclog_or_tty); |
| 3111 _failures = true; | |
| 3112 } | |
| 3113 } | |
| 3114 } | |
|
845
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|
3115 |
|
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changeset
|
3116 void do_oop(oop* p) { do_oop_nv(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
changeset
|
3117 void do_oop(narrowOop* p) { do_oop_nv(p); } |
| 342 | 3118 }; |
| 3119 | |
| 390 | 3120 // This is the task used for parallel heap verification. |
| 3121 | |
| 3122 class G1ParVerifyTask: public AbstractGangTask { | |
| 3123 private: | |
| 3124 G1CollectedHeap* _g1h; | |
|
3772
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changeset
|
3125 bool _allow_dirty; |
|
6747fd0512e0
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changeset
|
3126 VerifyOption _vo; |
|
6747fd0512e0
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changeset
|
3127 bool _failures; |
| 390 | 3128 |
| 3129 public: | |
|
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changeset
|
3130 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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changeset
|
3131 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3132 // _vo == UseMarkWord -> use mark word from object header. |
|
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|
3133 G1ParVerifyTask(G1CollectedHeap* g1h, bool allow_dirty, VerifyOption vo) : |
| 390 | 3134 AbstractGangTask("Parallel verify task"), |
|
845
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|
3135 _g1h(g1h), |
|
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|
3136 _allow_dirty(allow_dirty), |
|
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|
3137 _vo(vo), |
|
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|
3138 _failures(false) { } |
|
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|
3139 |
|
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|
3140 bool failures() { |
|
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|
3141 return _failures; |
|
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|
3142 } |
| 390 | 3143 |
|
4728
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|
3144 void work(uint worker_id) { |
|
637
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|
3145 HandleMark hm; |
|
3772
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changeset
|
3146 VerifyRegionClosure blk(_allow_dirty, true, _vo); |
|
4728
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|
3147 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
4095
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|
3148 _g1h->workers()->active_workers(), |
| 390 | 3149 HeapRegion::ParVerifyClaimValue); |
|
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|
3150 if (blk.failures()) { |
|
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|
3151 _failures = true; |
|
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|
3152 } |
| 390 | 3153 } |
| 3154 }; | |
| 3155 | |
| 342 | 3156 void G1CollectedHeap::verify(bool allow_dirty, bool silent) { |
|
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|
3157 verify(allow_dirty, silent, VerifyOption_G1UsePrevMarking); |
| 811 | 3158 } |
| 3159 | |
| 3160 void G1CollectedHeap::verify(bool allow_dirty, | |
| 3161 bool silent, | |
|
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|
3162 VerifyOption vo) { |
| 342 | 3163 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { |
|
3293
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|
3164 if (!silent) { gclog_or_tty->print("Roots (excluding permgen) "); } |
|
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|
3165 VerifyRootsClosure rootsCl(vo); |
|
4095
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|
3166 |
|
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changeset
|
3167 assert(Thread::current()->is_VM_thread(), |
|
bca17e38de00
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|
3168 "Expected to be executed serially by the VM thread at this point"); |
|
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|
3169 |
|
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148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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890
diff
changeset
|
3170 CodeBlobToOopClosure blobsCl(&rootsCl, /*do_marking=*/ false); |
|
3772
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|
3171 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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3289
diff
changeset
|
3172 // We apply the relevant closures to all the oops in the |
|
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
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diff
changeset
|
3173 // system dictionary, the string table and the code cache. |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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changeset
|
3174 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
|
3772
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changeset
|
3175 |
|
3293
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7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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diff
changeset
|
3176 process_strong_roots(true, // activate StrongRootsScope |
|
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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diff
changeset
|
3177 true, // we set "collecting perm gen" to true, |
|
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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diff
changeset
|
3178 // so we don't reset the dirty cards in the perm gen. |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
3179 ScanningOption(so), // roots scanning options |
| 342 | 3180 &rootsCl, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
3181 &blobsCl, |
| 342 | 3182 &rootsCl); |
|
3772
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changeset
|
3183 |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3184 // If we're verifying after the marking phase of a Full GC then we can't |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3185 // treat the perm gen as roots into the G1 heap. Some of the objects in |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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diff
changeset
|
3186 // the perm gen may be dead and hence not marked. If one of these dead |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3187 // objects is considered to be a root then we may end up with a false |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3188 // "Root location <x> points to dead ob <y>" failure. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3189 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3190 // Since we used "collecting_perm_gen" == true above, we will not have |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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diff
changeset
|
3191 // checked the refs from perm into the G1-collected heap. We check those |
|
6747fd0512e0
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changeset
|
3192 // references explicitly below. Whether the relevant cards are dirty |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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changeset
|
3193 // is checked further below in the rem set verification. |
|
6747fd0512e0
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diff
changeset
|
3194 if (!silent) { gclog_or_tty->print("Permgen roots "); } |
|
6747fd0512e0
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parents:
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changeset
|
3195 perm_gen()->oop_iterate(&rootsCl); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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diff
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|
3196 } |
|
1020
ff2402f6a50b
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changeset
|
3197 bool failures = rootsCl.failures(); |
|
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|
3198 |
|
6747fd0512e0
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diff
changeset
|
3199 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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changeset
|
3200 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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diff
changeset
|
3201 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
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diff
changeset
|
3202 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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changeset
|
3203 // the region sets when not in a full GC. |
|
6747fd0512e0
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johnc
parents:
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changeset
|
3204 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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diff
changeset
|
3205 verify_region_sets(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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diff
changeset
|
3206 } |
|
6747fd0512e0
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parents:
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diff
changeset
|
3207 |
| 2152 | 3208 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3209 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3210 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3211 "sanity check"); | |
| 3212 | |
|
3772
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changeset
|
3213 G1ParVerifyTask task(this, allow_dirty, vo); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
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diff
changeset
|
3214 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3215 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
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diff
changeset
|
3216 "If not dynamic should be using all the workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
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diff
changeset
|
3217 int n_workers = workers()->active_workers(); |
| 390 | 3218 set_par_threads(n_workers); |
| 3219 workers()->run_task(&task); | |
| 3220 set_par_threads(0); | |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3221 if (task.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3222 failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3223 } |
| 390 | 3224 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
3225 // Checks that the expected amount of parallel work was done. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3226 // The implication is that n_workers is > 0. |
| 390 | 3227 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3228 "sanity check"); | |
| 3229 | |
| 3230 reset_heap_region_claim_values(); | |
| 3231 | |
| 3232 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3233 "sanity check"); | |
| 3234 } else { | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3235 VerifyRegionClosure blk(allow_dirty, false, vo); |
| 3766 | 3236 heap_region_iterate(&blk); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3237 if (blk.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3238 failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3239 } |
| 390 | 3240 } |
| 2152 | 3241 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3242 rem_set()->verify(); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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diff
changeset
|
3243 |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3244 if (failures) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3245 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3246 // 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
|
3247 // 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
|
3248 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3249 print_extended_on(gclog_or_tty); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3250 gclog_or_tty->print_cr(""); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3251 #ifndef PRODUCT |
| 1044 | 3252 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3253 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3254 vo, false /* all */); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3255 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3256 #endif |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3257 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3258 } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3259 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3260 } else { |
| 3261 if (!silent) gclog_or_tty->print("(SKIPPING roots, heapRegions, remset) "); | |
| 3262 } | |
| 3263 } | |
| 3264 | |
| 3265 class PrintRegionClosure: public HeapRegionClosure { | |
| 3266 outputStream* _st; | |
| 3267 public: | |
| 3268 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3269 bool doHeapRegion(HeapRegion* r) { | |
| 3270 r->print_on(_st); | |
| 3271 return false; | |
| 3272 } | |
| 3273 }; | |
| 3274 | |
| 3275 void G1CollectedHeap::print_on(outputStream* st) const { | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3276 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3277 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
|
3278 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3279 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3280 _g1_storage.low_boundary(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3281 _g1_storage.high(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3282 _g1_storage.high_boundary()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3283 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3284 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3285 size_t young_regions = _young_list->length(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3286 st->print(SIZE_FORMAT " young (" SIZE_FORMAT "K), ", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3287 young_regions, young_regions * HeapRegion::GrainBytes / K); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3288 size_t survivor_regions = g1_policy()->recorded_survivor_regions(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3289 st->print(SIZE_FORMAT " survivors (" SIZE_FORMAT "K)", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3290 survivor_regions, survivor_regions * HeapRegion::GrainBytes / K); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3291 st->cr(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3292 perm()->as_gen()->print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3293 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3294 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3295 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3296 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3297 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
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4072
diff
changeset
|
3298 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
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4072
diff
changeset
|
3299 st->cr(); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
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4072
diff
changeset
|
3300 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), HS=humongous(starts), HC=humongous(continues), CS=collection set, F=free, TS=gc time stamp, PTAMS=previous top-at-mark-start, NTAMS=next top-at-mark-start)"); |
| 342 | 3301 PrintRegionClosure blk(st); |
| 3766 | 3302 heap_region_iterate(&blk); |
| 342 | 3303 } |
| 3304 | |
| 3305 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3306 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3307 workers()->print_worker_threads_on(st); |
| 3308 } | |
| 3309 _cmThread->print_on(st); | |
| 342 | 3310 st->cr(); |
| 1019 | 3311 _cm->print_worker_threads_on(st); |
| 3312 _cg1r->print_worker_threads_on(st); | |
| 342 | 3313 st->cr(); |
| 3314 } | |
| 3315 | |
| 3316 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3317 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3318 workers()->threads_do(tc); |
| 3319 } | |
| 3320 tc->do_thread(_cmThread); | |
| 794 | 3321 _cg1r->threads_do(tc); |
| 342 | 3322 } |
| 3323 | |
| 3324 void G1CollectedHeap::print_tracing_info() const { | |
| 3325 // We'll overload this to mean "trace GC pause statistics." | |
| 3326 if (TraceGen0Time || TraceGen1Time) { | |
| 3327 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3328 // to that. | |
| 3329 g1_policy()->print_tracing_info(); | |
| 3330 } | |
| 751 | 3331 if (G1SummarizeRSetStats) { |
| 342 | 3332 g1_rem_set()->print_summary_info(); |
| 3333 } | |
| 1282 | 3334 if (G1SummarizeConcMark) { |
| 342 | 3335 concurrent_mark()->print_summary_info(); |
| 3336 } | |
| 3337 g1_policy()->print_yg_surv_rate_info(); | |
| 3338 SpecializationStats::print(); | |
| 3339 } | |
| 3340 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3341 #ifndef PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3342 // Helpful for debugging RSet issues. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3343 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3344 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3345 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3346 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3347 size_t _occupied_sum; |
|
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|
3348 |
|
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|
3349 public: |
|
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|
3350 bool doHeapRegion(HeapRegion* r) { |
|
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|
3351 HeapRegionRemSet* hrrs = r->rem_set(); |
|
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3352 size_t occupied = hrrs->occupied(); |
|
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|
3353 _occupied_sum += occupied; |
|
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|
3354 |
|
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|
3355 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
|
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|
3356 HR_FORMAT_PARAMS(r)); |
|
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|
3357 if (occupied == 0) { |
|
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|
3358 gclog_or_tty->print_cr(" RSet is empty"); |
|
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|
3359 } else { |
|
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|
3360 hrrs->print(); |
|
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|
3361 } |
|
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|
3362 gclog_or_tty->print_cr("----------"); |
|
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|
3363 return false; |
|
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|
3364 } |
|
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|
3365 |
|
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|
3366 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
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|
3367 gclog_or_tty->cr(); |
|
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|
3368 gclog_or_tty->print_cr("========================================"); |
|
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|
3369 gclog_or_tty->print_cr(msg); |
|
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|
3370 gclog_or_tty->cr(); |
|
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|
3371 } |
|
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|
3372 |
|
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|
3373 ~PrintRSetsClosure() { |
|
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|
3374 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
|
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|
3375 gclog_or_tty->print_cr("========================================"); |
|
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|
3376 gclog_or_tty->cr(); |
|
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|
3377 } |
|
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|
3378 }; |
|
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|
3379 |
|
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|
3380 void G1CollectedHeap::print_cset_rsets() { |
|
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|
3381 PrintRSetsClosure cl("Printing CSet RSets"); |
|
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|
3382 collection_set_iterate(&cl); |
|
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|
3383 } |
|
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|
3384 |
|
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|
3385 void G1CollectedHeap::print_all_rsets() { |
|
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|
3386 PrintRSetsClosure cl("Printing All RSets");; |
|
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|
3387 heap_region_iterate(&cl); |
|
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|
3388 } |
|
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|
3389 #endif // PRODUCT |
|
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|
3390 |
| 342 | 3391 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3392 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3393 "not a garbage-first heap"); | |
| 3394 return _g1h; | |
| 3395 } | |
| 3396 | |
| 3397 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
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|
3398 // always_do_update_barrier = false; |
| 342 | 3399 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3400 // Call allocation profiler | |
| 3401 AllocationProfiler::iterate_since_last_gc(); | |
| 3402 // Fill TLAB's and such | |
| 3403 ensure_parsability(true); | |
| 3404 } | |
| 3405 | |
| 3406 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
| 3407 // FIXME: what is this about? | |
| 3408 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3409 // is set. | |
| 3410 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3411 "derived pointer present")); | |
|
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|
3412 // always_do_update_barrier = true; |
|
3979
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|
3413 |
|
4dfb2df418f2
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|
3414 // We have just completed a GC. Update the soft reference |
|
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|
3415 // policy with the new heap occupancy |
|
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|
3416 Universe::update_heap_info_at_gc(); |
| 342 | 3417 } |
| 3418 | |
| 1973 | 3419 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3420 unsigned int gc_count_before, | |
| 3421 bool* succeeded) { | |
| 3422 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 3423 g1_policy()->record_stop_world_start(); |
| 1973 | 3424 VM_G1IncCollectionPause op(gc_count_before, |
| 3425 word_size, | |
| 3426 false, /* should_initiate_conc_mark */ | |
| 3427 g1_policy()->max_pause_time_ms(), | |
| 3428 GCCause::_g1_inc_collection_pause); | |
| 3429 VMThread::execute(&op); | |
| 3430 | |
| 3431 HeapWord* result = op.result(); | |
| 3432 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3433 assert(result == NULL || ret_succeeded, | |
| 3434 "the result should be NULL if the VM did not succeed"); | |
| 3435 *succeeded = ret_succeeded; | |
| 3436 | |
| 3437 assert_heap_not_locked(); | |
| 3438 return result; | |
| 342 | 3439 } |
| 3440 | |
| 3441 void | |
| 3442 G1CollectedHeap::doConcurrentMark() { | |
|
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3443 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
|
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|
3444 if (!_cmThread->in_progress()) { |
|
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|
3445 _cmThread->set_started(); |
|
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|
3446 CGC_lock->notify(); |
| 342 | 3447 } |
| 3448 } | |
| 3449 | |
| 3450 double G1CollectedHeap::predict_region_elapsed_time_ms(HeapRegion *hr, | |
| 3451 bool young) { | |
| 3452 return _g1_policy->predict_region_elapsed_time_ms(hr, young); | |
| 3453 } | |
| 3454 | |
| 3455 void G1CollectedHeap::check_if_region_is_too_expensive(double | |
| 3456 predicted_time_ms) { | |
| 3457 _g1_policy->check_if_region_is_too_expensive(predicted_time_ms); | |
| 3458 } | |
| 3459 | |
| 3460 size_t G1CollectedHeap::pending_card_num() { | |
| 3461 size_t extra_cards = 0; | |
| 3462 JavaThread *curr = Threads::first(); | |
| 3463 while (curr != NULL) { | |
| 3464 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3465 extra_cards += dcq.size(); | |
| 3466 curr = curr->next(); | |
| 3467 } | |
| 3468 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3469 size_t buffer_size = dcqs.buffer_size(); | |
| 3470 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 3471 return buffer_size * buffer_num + extra_cards; | |
| 3472 } | |
| 3473 | |
| 3474 size_t G1CollectedHeap::max_pending_card_num() { | |
| 3475 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3476 size_t buffer_size = dcqs.buffer_size(); | |
| 3477 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 3478 int thread_num = Threads::number_of_threads(); | |
| 3479 return (buffer_num + thread_num) * buffer_size; | |
| 3480 } | |
| 3481 | |
| 3482 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3483 return g1_rem_set()->cardsScanned(); |
| 342 | 3484 } |
| 3485 | |
| 3486 void | |
| 3487 G1CollectedHeap::setup_surviving_young_words() { | |
| 3488 guarantee( _surviving_young_words == NULL, "pre-condition" ); | |
|
4090
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|
3489 size_t array_length = g1_policy()->young_cset_region_length(); |
| 342 | 3490 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, array_length); |
| 3491 if (_surviving_young_words == NULL) { | |
| 3492 vm_exit_out_of_memory(sizeof(size_t) * array_length, | |
| 3493 "Not enough space for young surv words summary."); | |
| 3494 } | |
| 3495 memset(_surviving_young_words, 0, array_length * sizeof(size_t)); | |
|
845
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|
3496 #ifdef ASSERT |
| 342 | 3497 for (size_t i = 0; i < array_length; ++i) { |
|
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|
3498 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
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|
3499 } |
|
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|
3500 #endif // !ASSERT |
| 342 | 3501 } |
| 3502 | |
| 3503 void | |
| 3504 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3505 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
|
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|
3506 size_t array_length = g1_policy()->young_cset_region_length(); |
| 342 | 3507 for (size_t i = 0; i < array_length; ++i) |
| 3508 _surviving_young_words[i] += surv_young_words[i]; | |
| 3509 } | |
| 3510 | |
| 3511 void | |
| 3512 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3513 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 3514 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words); | |
| 3515 _surviving_young_words = NULL; | |
| 3516 } | |
| 3517 | |
|
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|
3518 #ifdef ASSERT |
|
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|
3519 class VerifyCSetClosure: public HeapRegionClosure { |
|
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|
3520 public: |
|
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|
3521 bool doHeapRegion(HeapRegion* hr) { |
|
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|
3522 // Here we check that the CSet region's RSet is ready for parallel |
|
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|
3523 // iteration. The fields that we'll verify are only manipulated |
|
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|
3524 // when the region is part of a CSet and is collected. Afterwards, |
|
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|
3525 // we reset these fields when we clear the region's RSet (when the |
|
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|
3526 // region is freed) so they are ready when the region is |
|
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|
3527 // re-allocated. The only exception to this is if there's an |
|
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|
3528 // evacuation failure and instead of freeing the region we leave |
|
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|
3529 // it in the heap. In that case, we reset these fields during |
|
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|
3530 // evacuation failure handling. |
|
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|
3531 guarantee(hr->rem_set()->verify_ready_for_par_iteration(), "verification"); |
|
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|
3532 |
|
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|
3533 // Here's a good place to add any other checks we'd like to |
|
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changeset
|
3534 // perform on CSet regions. |
|
1261
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diff
changeset
|
3535 return false; |
|
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diff
changeset
|
3536 } |
|
0414c1049f15
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diff
changeset
|
3537 }; |
|
3777
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|
3538 #endif // ASSERT |
|
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|
3539 |
| 1709 | 3540 #if TASKQUEUE_STATS |
| 3541 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3542 st->print_raw_cr("GC Task Stats"); | |
| 3543 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3544 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3545 } | |
| 3546 | |
| 3547 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3548 print_taskqueue_stats_hdr(st); | |
| 3549 | |
| 3550 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3551 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3552 for (int i = 0; i < n; ++i) { |
| 3553 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3554 totals += task_queue(i)->stats; | |
| 3555 } | |
| 3556 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3557 | |
| 3558 DEBUG_ONLY(totals.verify()); | |
| 3559 } | |
| 3560 | |
| 3561 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
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1719
diff
changeset
|
3562 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3563 for (int i = 0; i < n; ++i) { |
| 3564 task_queue(i)->stats.reset(); | |
| 3565 } | |
| 3566 } | |
| 3567 #endif // TASKQUEUE_STATS | |
| 3568 | |
| 1973 | 3569 bool |
|
1656
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6944166: G1: explicit GCs are not always handled correctly
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1611
diff
changeset
|
3570 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3571 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3572 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3573 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
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1313
diff
changeset
|
3574 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3575 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3576 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3577 |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3578 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3579 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3580 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3581 print_heap_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3582 |
| 4072 | 3583 HRSPhaseSetter x(HRSPhaseEvacuation); |
| 2152 | 3584 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3585 verify_dirty_young_regions(); |
| 2152 | 3586 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3587 // 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
|
3588 // 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
|
3589 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3590 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3591 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3592 // 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
|
3593 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3594 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3595 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3596 // 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
|
3597 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
|
3598 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3599 // 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
|
3600 // 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
|
3601 // 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
|
3602 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
|
3603 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3604 // 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
|
3605 { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3606 char verbose_str[128]; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3607 sprintf(verbose_str, "GC pause "); |
| 4710 | 3608 if (g1_policy()->gcs_are_young()) { |
|
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3609 strcat(verbose_str, "(young)"); |
|
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3610 } else { |
| 4710 | 3611 strcat(verbose_str, "(mixed)"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3612 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3613 if (g1_policy()->during_initial_mark_pause()) { |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3614 strcat(verbose_str, " (initial-mark)"); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3615 // 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
|
3616 // full collection counter. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3617 increment_total_full_collections(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3618 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3619 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3620 // if PrintGCDetails is on, we'll print long statistics information |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3621 // in the collector policy code, so let's not print this as the output |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3622 // is messy if we do. |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3623 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3624 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3625 TraceTime t(verbose_str, PrintGC && !PrintGCDetails, true, gclog_or_tty); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3626 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3627 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3628 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3629 |
| 2361 | 3630 // If the secondary_free_list is not empty, append it to the |
| 3631 // free_list. No need to wait for the cleanup operation to finish; | |
| 3632 // the region allocation code will check the secondary_free_list | |
| 3633 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3634 // set, skip this step so that the region allocation code has to | |
| 3635 // get entries from the secondary_free_list. | |
| 2152 | 3636 if (!G1StressConcRegionFreeing) { |
| 2361 | 3637 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3638 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3639 |
|
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3640 assert(check_young_list_well_formed(), |
|
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3641 "young list should be well formed"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3642 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3643 // 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
|
3644 // 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
|
3645 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3646 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3647 { // 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
|
3648 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3649 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3650 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3651 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
|
3652 increment_gc_time_stamp(); |
| 342 | 3653 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3654 if (VerifyBeforeGC && total_collections() >= VerifyGCStartAt) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3655 HandleMark hm; // Discard invalid handles created during verification |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3656 gclog_or_tty->print(" VerifyBeforeGC:"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3657 prepare_for_verify(); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3658 Universe::verify(/* allow dirty */ false, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3659 /* silent */ false, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3660 /* option */ VerifyOption_G1UsePrevMarking); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3661 } |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3662 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3663 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3664 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3665 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3666 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3667 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3668 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3669 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3670 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3671 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3672 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3673 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3674 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3675 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3676 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3677 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3678 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3679 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3680 // 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
|
3681 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3682 release_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3683 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3684 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3685 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3686 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3687 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3688 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3689 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3690 // the possible verification above. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3691 double start_time_sec = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3692 size_t start_used_bytes = used(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3693 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3694 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3695 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3696 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3697 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
|
3698 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3699 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3700 g1_policy()->record_collection_pause_start(start_time_sec, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3701 start_used_bytes); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3702 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3703 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3704 // 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
|
3705 // 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
|
3706 // 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
|
3707 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3708 bool waited = _cm->root_regions()->wait_until_scan_finished(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3709 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3710 double scan_wait_end = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3711 double wait_time_ms = (scan_wait_end - scan_wait_start) * 1000.0; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3712 g1_policy()->record_root_region_scan_wait_time(wait_time_ms); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3713 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3714 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3715 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3716 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3717 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3718 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3719 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3720 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3721 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3722 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3723 perm_gen()->save_marks(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3724 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3725 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3726 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3727 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3728 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
|
3729 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3730 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3731 g1_policy()->choose_collection_set(target_pause_time_ms); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3732 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3733 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3734 // 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
|
3735 // we have not filtered them yet (we'll do so during the |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3736 // GC). We also call this after choose_collection_set() to |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3737 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3738 _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
|
3739 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3740 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3741 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3742 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3743 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3744 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3745 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3746 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3747 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3748 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3749 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3750 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3751 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3752 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3753 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3754 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3755 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3756 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3757 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3758 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3759 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3760 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3761 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3762 #endif // ASSERT |
| 1707 | 3763 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3764 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3765 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3766 // Initialize the GC alloc regions. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3767 init_gc_alloc_regions(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3768 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3769 // Actually do the work... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3770 evacuate_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3771 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3772 // 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
|
3773 // (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
|
3774 // 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
|
3775 // 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
|
3776 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3777 _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
|
3778 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3779 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3780 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3781 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3782 free_collection_set(g1_policy()->collection_set()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3783 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3784 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3785 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3786 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3787 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3788 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3789 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3790 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3791 // regions to the incremental collection set for the next |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3792 // evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3793 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3794 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3795 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3796 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3797 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3798 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3799 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3800 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3801 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3802 "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
|
3803 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3804 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3805 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3806 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3807 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3808 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3809 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3810 _young_list->first_survivor_region(), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3811 _young_list->last_survivor_region()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3812 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3813 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3814 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3815 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3816 _summary_bytes_used = recalculate_used(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3817 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3818 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3819 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3820 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3821 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3822 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3823 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3824 // 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
|
3825 // 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
|
3826 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3827 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3828 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3829 // 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
|
3830 // 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
|
3831 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3832 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3833 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3834 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
3835 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3836 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3837 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3838 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3839 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
|
3840 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3841 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3842 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3843 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3844 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3845 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3846 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3847 size_t bytes_before = capacity(); |
| 4785 | 3848 // No need for an ergo verbose message here, |
| 3849 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3850 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3851 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3852 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3853 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3854 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3855 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
3856 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
3857 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3858 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3859 // We redo the verificaiton but now wrt to the new CSet which |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3860 // 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
|
3861 _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
|
3862 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3863 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3864 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3865 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3866 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3867 double end_time_sec = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3868 double pause_time_ms = (end_time_sec - start_time_sec) * MILLIUNITS; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3869 g1_policy()->record_pause_time_ms(pause_time_ms); |
| 4711 | 3870 int active_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
| 3871 workers()->active_workers() : 1); | |
| 3872 g1_policy()->record_collection_pause_end(active_workers); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3873 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3874 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3875 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3876 // 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
|
3877 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3878 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3879 // 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
|
3880 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3881 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3882 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3883 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3884 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3885 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3886 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3887 // 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
|
3888 // 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
|
3889 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3890 // 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
|
3891 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3892 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3893 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3894 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3895 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3896 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3897 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3898 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3899 if (VerifyAfterGC && total_collections() >= VerifyGCStartAt) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3900 HandleMark hm; // Discard invalid handles created during verification |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3901 gclog_or_tty->print(" VerifyAfterGC:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3902 prepare_for_verify(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3903 Universe::verify(/* allow dirty */ true, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3904 /* silent */ false, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3905 /* option */ VerifyOption_G1UsePrevMarking); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3906 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3907 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3908 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3909 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3910 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3911 // 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
|
3912 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
3913 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3914 // 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
|
3915 // 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
|
3916 // 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
|
3917 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3918 _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
|
3919 |
|
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
3378
diff
changeset
|
3920 // We have to do this after we decide whether to expand the heap or not. |
|
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
3378
diff
changeset
|
3921 g1_policy()->print_heap_transition(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3922 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3923 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3924 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3925 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
3926 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
3927 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3928 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
3929 #endif |
| 342 | 3930 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3931 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3932 } |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3933 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3934 if (ExitAfterGCNum > 0 && total_collections() == ExitAfterGCNum) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3935 gclog_or_tty->print_cr("Stopping after GC #%d", ExitAfterGCNum); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3936 print_tracing_info(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3937 vm_exit(-1); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3938 } |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3939 } |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3940 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3941 // The closing of the inner scope, immediately above, will complete |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3942 // the PrintGC logging output. The record_collection_pause_end() call |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3943 // above will complete the logging output of PrintGCDetails. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3944 // |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3945 // It is not yet to safe, however, to tell the concurrent mark to |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3946 // start as we have some optional output below. We don't want the |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3947 // output from the concurrent mark thread interfering with this |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3948 // logging output either. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3949 |
| 3766 | 3950 _hrs.verify_optional(); |
| 2152 | 3951 verify_region_sets_optional(); |
| 3952 | |
| 1709 | 3953 TASKQUEUE_STATS_ONLY(if (ParallelGCVerbose) print_taskqueue_stats()); |
| 3954 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); | |
| 3955 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3956 print_heap_after_gc(); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
3957 g1mm()->update_sizes(); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3958 |
|
884
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
3959 if (G1SummarizeRSetStats && |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
3960 (G1SummarizeRSetStatsPeriod > 0) && |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
3961 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
3962 g1_rem_set()->print_summary_info(); |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
3963 } |
| 1973 | 3964 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3965 // 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
|
3966 // 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
|
3967 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3968 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3969 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3970 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3971 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3972 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3973 // 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
|
3974 // 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
|
3975 // 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
|
3976 // ConcurrentGCThread::safepoint_desynchronize(). |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3977 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3978 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3979 |
| 1973 | 3980 return true; |
| 342 | 3981 } |
| 3982 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3983 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3984 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3985 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3986 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3987 case GCAllocForSurvived: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3988 gclab_word_size = YoungPLABSize; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3989 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3990 case GCAllocForTenured: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3991 gclab_word_size = OldPLABSize; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3992 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3993 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3994 assert(false, "unknown GCAllocPurpose"); |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3995 gclab_word_size = OldPLABSize; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3996 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3997 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3998 return gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3999 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4000 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4001 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4002 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4003 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4004 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4005 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4006 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4007 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4008 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4009 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4010 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4011 void G1CollectedHeap::init_gc_alloc_regions() { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4012 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
|
4013 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4014 _survivor_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4015 _old_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4016 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
|
4017 _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
|
4018 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4019 // 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
|
4020 // 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
|
4021 // 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
|
4022 // 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
|
4023 // 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
|
4024 // 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
|
4025 // during a cleanup and was added to the free list, but |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4026 // has been subseqently used to allocate a humongous |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4027 // 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
|
4028 if (retained_region != NULL && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4029 !retained_region->in_collection_set() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4030 !(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
|
4031 !retained_region->is_empty() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4032 !retained_region->isHumongous()) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4033 retained_region->set_saved_mark(); |
| 4072 | 4034 // The retained region was added to the old region set when it was |
| 4035 // retired. We have to remove it now, since we don't allow regions | |
| 4036 // we allocate to in the region sets. We'll re-add it later, when | |
| 4037 // it's retired again. | |
| 4038 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4039 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
|
4040 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
|
4041 _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
|
4042 _hr_printer.reuse(retained_region); |
| 342 | 4043 } |
| 4044 } | |
| 4045 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4046 void G1CollectedHeap::release_gc_alloc_regions() { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4047 _survivor_gc_alloc_region.release(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4048 // 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
|
4049 // _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
|
4050 // _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
|
4051 // 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
|
4052 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4053 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 342 | 4054 } |
| 4055 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4056 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
|
4057 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
|
4058 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
|
4059 _retained_old_gc_alloc_region = NULL; |
| 342 | 4060 } |
| 4061 | |
| 4062 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4063 _drain_in_progress = false; | |
| 4064 set_evac_failure_closure(cl); | |
| 4065 _evac_failure_scan_stack = new (ResourceObj::C_HEAP) GrowableArray<oop>(40, true); | |
| 4066 } | |
| 4067 | |
| 4068 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4069 assert(_evac_failure_scan_stack != NULL && | |
| 4070 _evac_failure_scan_stack->length() == 0, | |
| 4071 "Postcondition"); | |
| 4072 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4073 delete _evac_failure_scan_stack; |
| 342 | 4074 _evac_failure_scan_stack = NULL; |
| 4075 } | |
| 4076 | |
| 4077 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
|
4078 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
|
4079 assert(g1_policy()->assertMarkedBytesDataOK(), "Should be!"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4080 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4081 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4082 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4083 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4084 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4085 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4086 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4087 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4088 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4089 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4090 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4091 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
|
4092 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4093 // 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
|
4094 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4095 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4096 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4097 assert(g1_policy()->assertMarkedBytesDataOK(), "Should be!"); |
| 4098 | |
| 4099 // Now restore saved marks, if any. | |
| 4100 if (_objs_with_preserved_marks != NULL) { | |
| 4101 assert(_preserved_marks_of_objs != NULL, "Both or none."); | |
| 4102 guarantee(_objs_with_preserved_marks->length() == | |
| 4103 _preserved_marks_of_objs->length(), "Both or none."); | |
| 4104 for (int i = 0; i < _objs_with_preserved_marks->length(); i++) { | |
| 4105 oop obj = _objs_with_preserved_marks->at(i); | |
| 4106 markOop m = _preserved_marks_of_objs->at(i); | |
| 4107 obj->set_mark(m); | |
| 4108 } | |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4109 |
| 342 | 4110 // Delete the preserved marks growable arrays (allocated on the C heap). |
| 4111 delete _objs_with_preserved_marks; | |
| 4112 delete _preserved_marks_of_objs; | |
| 4113 _objs_with_preserved_marks = NULL; | |
| 4114 _preserved_marks_of_objs = NULL; | |
| 4115 } | |
| 4116 } | |
| 4117 | |
| 4118 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4119 _evac_failure_scan_stack->push(obj); | |
| 4120 } | |
| 4121 | |
| 4122 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4123 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4124 | |
| 4125 while (_evac_failure_scan_stack->length() > 0) { | |
| 4126 oop obj = _evac_failure_scan_stack->pop(); | |
| 4127 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4128 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4129 } | |
| 4130 } | |
| 4131 | |
| 4132 oop | |
| 4133 G1CollectedHeap::handle_evacuation_failure_par(OopsInHeapRegionClosure* cl, | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4134 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
|
4135 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
|
4136 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
|
4137 (HeapWord*) old)); |
| 342 | 4138 markOop m = old->mark(); |
| 4139 oop forward_ptr = old->forward_to_atomic(old); | |
| 4140 if (forward_ptr == NULL) { | |
| 4141 // Forward-to-self succeeded. | |
|
3973
663cb89032b1
7092412: G1: Some roots not marked during an initial mark that gets an evacuation failure
johnc
parents:
3920
diff
changeset
|
4142 |
| 342 | 4143 if (_evac_failure_closure != cl) { |
| 4144 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4145 assert(!_drain_in_progress, | |
| 4146 "Should only be true while someone holds the lock."); | |
| 4147 // Set the global evac-failure closure to the current thread's. | |
| 4148 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4149 set_evac_failure_closure(cl); | |
| 4150 // Now do the common part. | |
| 4151 handle_evacuation_failure_common(old, m); | |
| 4152 // Reset to NULL. | |
| 4153 set_evac_failure_closure(NULL); | |
| 4154 } else { | |
| 4155 // The lock is already held, and this is recursive. | |
| 4156 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4157 handle_evacuation_failure_common(old, m); | |
| 4158 } | |
| 4159 return old; | |
| 4160 } 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
|
4161 // 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
|
4162 // 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
|
4163 // 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
|
4164 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
|
4165 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
|
4166 "should not be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4167 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4168 return forward_ptr; |
| 4169 } | |
| 4170 } | |
| 4171 | |
| 4172 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4173 set_evacuation_failed(true); | |
| 4174 | |
| 4175 preserve_mark_if_necessary(old, m); | |
| 4176 | |
| 4177 HeapRegion* r = heap_region_containing(old); | |
| 4178 if (!r->evacuation_failed()) { | |
| 4179 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4180 _hr_printer.evac_failure(r); |
| 342 | 4181 } |
| 4182 | |
| 4183 push_on_evac_failure_scan_stack(old); | |
| 4184 | |
| 4185 if (!_drain_in_progress) { | |
| 4186 // prevent recursion in copy_to_survivor_space() | |
| 4187 _drain_in_progress = true; | |
| 4188 drain_evac_failure_scan_stack(); | |
| 4189 _drain_in_progress = false; | |
| 4190 } | |
| 4191 } | |
| 4192 | |
| 4193 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
|
4194 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4195 // 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
|
4196 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4197 if (m->must_be_preserved_for_promotion_failure(obj)) { |
| 342 | 4198 if (_objs_with_preserved_marks == NULL) { |
| 4199 assert(_preserved_marks_of_objs == NULL, "Both or none."); | |
| 4200 _objs_with_preserved_marks = | |
| 4201 new (ResourceObj::C_HEAP) GrowableArray<oop>(40, true); | |
| 4202 _preserved_marks_of_objs = | |
| 4203 new (ResourceObj::C_HEAP) GrowableArray<markOop>(40, true); | |
| 4204 } | |
| 4205 _objs_with_preserved_marks->push(obj); | |
| 4206 _preserved_marks_of_objs->push(m); | |
| 4207 } | |
| 4208 } | |
| 4209 | |
| 4210 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4211 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4212 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4213 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
|
4214 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4215 return result; |
| 342 | 4216 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4217 // 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
|
4218 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4219 return old_attempt_allocation(word_size); |
| 342 | 4220 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4221 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4222 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4223 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
|
4224 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4225 return result; |
| 342 | 4226 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4227 // 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
|
4228 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4229 return survivor_attempt_allocation(word_size); |
| 342 | 4230 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4231 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4232 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4233 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4234 // 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
|
4235 return NULL; |
| 342 | 4236 } |
| 4237 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4238 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
|
4239 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4240 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4241 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num) |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4242 : _g1h(g1h), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4243 _refs(g1h->task_queue(queue_num)), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4244 _dcq(&g1h->dirty_card_queue_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4245 _ct_bs((CardTableModRefBS*)_g1h->barrier_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4246 _g1_rem(g1h->g1_rem_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4247 _hash_seed(17), _queue_num(queue_num), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4248 _term_attempts(0), |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4249 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4250 _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
|
4251 _age_table(false), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4252 _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
|
4253 _alloc_buffer_waste(0), _undo_waste(0) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4254 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4255 // 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
|
4256 // non-young regions (where the age is -1) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4257 // 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
|
4258 // an attempt to eliminate cache contention |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
4259 size_t real_length = 1 + _g1h->g1_policy()->young_cset_region_length(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4260 size_t array_length = PADDING_ELEM_NUM + |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4261 real_length + |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4262 PADDING_ELEM_NUM; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4263 _surviving_young_words_base = NEW_C_HEAP_ARRAY(size_t, array_length); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4264 if (_surviving_young_words_base == NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4265 vm_exit_out_of_memory(array_length * sizeof(size_t), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4266 "Not enough space for young surv histo."); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4267 _surviving_young_words = _surviving_young_words_base + PADDING_ELEM_NUM; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4268 memset(_surviving_young_words, 0, real_length * sizeof(size_t)); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4269 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4270 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4271 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4272 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4273 _start = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4274 } |
| 342 | 4275 |
| 1709 | 4276 void |
| 4277 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
| 4278 { | |
| 4279 st->print_raw_cr("GC Termination Stats"); | |
| 4280 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
| 4281 " ------waste (KiB)------"); | |
| 4282 st->print_raw_cr("thr ms ms % ms % attempts" | |
| 4283 " total alloc undo"); | |
| 4284 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
| 4285 " ------- ------- -------"); | |
| 4286 } | |
| 4287 | |
| 4288 void | |
| 4289 G1ParScanThreadState::print_termination_stats(int i, | |
| 4290 outputStream* const st) const | |
| 4291 { | |
| 4292 const double elapsed_ms = elapsed_time() * 1000.0; | |
| 4293 const double s_roots_ms = strong_roots_time() * 1000.0; | |
| 4294 const double term_ms = term_time() * 1000.0; | |
| 4295 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
| 4296 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
| 4297 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
| 4298 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
| 4299 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
| 4300 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
| 4301 alloc_buffer_waste() * HeapWordSize / K, | |
| 4302 undo_waste() * HeapWordSize / K); | |
| 4303 } | |
| 4304 | |
|
1862
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6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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1861
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|
4305 #ifdef ASSERT |
|
b14ec34b1e07
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jcoomes
parents:
1861
diff
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|
4306 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
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|
4307 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4308 assert(UseCompressedOops, "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
changeset
|
4309 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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|
4310 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
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|
4311 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
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|
4312 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
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|
4313 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4314 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4315 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4316 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
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|
4317 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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diff
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|
4318 if (has_partial_array_mask(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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changeset
|
4319 // Must be in the collection set--it's already been copied. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
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|
4320 oop p = clear_partial_array_mask(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4321 assert(_g1h->obj_in_cs(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
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|
4322 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4323 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4324 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
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|
4325 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4326 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4327 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4328 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4329 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4330 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4331 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
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|
4332 if (ref.is_narrow()) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4333 return verify_ref((narrowOop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4334 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
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|
4335 return verify_ref((oop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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|
4336 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
changeset
|
4337 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4338 #endif // ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
changeset
|
4339 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
changeset
|
4340 void G1ParScanThreadState::trim_queue() { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4341 assert(_evac_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4342 assert(_evac_failure_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4343 assert(_partial_scan_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4344 |
|
1862
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jcoomes
parents:
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diff
changeset
|
4345 StarTask ref; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
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parents:
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diff
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|
4346 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
changeset
|
4347 // Drain the overflow stack first, so other threads can steal. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
changeset
|
4348 while (refs()->pop_overflow(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4349 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
changeset
|
4350 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4351 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
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diff
changeset
|
4352 while (refs()->pop_local(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4353 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4354 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4355 } while (!refs()->is_empty()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4356 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4357 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4358 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4359 G1ParScanThreadState* par_scan_state) : |
| 342 | 4360 _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
|
4361 _par_scan_state(par_scan_state), |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4362 _worker_id(par_scan_state->queue_num()), |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4363 _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
|
4364 _mark_in_progress(_g1->mark_in_progress()) { } |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4365 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4366 void G1ParCopyHelper::mark_object(oop obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4367 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4368 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4369 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4370 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
|
4371 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4372 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4373 // 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
|
4374 _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
|
4375 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4376 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4377 void G1ParCopyHelper::mark_forwarded_object(oop from_obj, oop to_obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4378 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4379 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
|
4380 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
|
4381 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
|
4382 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4383 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
|
4384 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4385 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
|
4386 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4387 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
|
4388 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4389 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
|
4390 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4391 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4392 // 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
|
4393 // 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
|
4394 // 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
|
4395 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4396 _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
|
4397 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4398 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4399 oop G1ParCopyHelper::copy_to_survivor_space(oop old) { |
| 342 | 4400 size_t word_sz = old->size(); |
| 4401 HeapRegion* from_region = _g1->heap_region_containing_raw(old); | |
| 4402 // +1 to make the -1 indexes valid... | |
| 4403 int young_index = from_region->young_index_in_cset()+1; | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4404 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
|
4405 (!from_region->is_young() && young_index == 0), "invariant" ); |
| 342 | 4406 G1CollectorPolicy* g1p = _g1->g1_policy(); |
| 4407 markOop m = old->mark(); | |
| 545 | 4408 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
| 4409 : m->age(); | |
| 4410 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
| 342 | 4411 word_sz); |
| 4412 HeapWord* obj_ptr = _par_scan_state->allocate(alloc_purpose, word_sz); | |
| 4413 oop obj = oop(obj_ptr); | |
| 4414 | |
| 4415 if (obj_ptr == NULL) { | |
| 4416 // This will either forward-to-self, or detect that someone else has | |
| 4417 // installed a forwarding pointer. | |
| 4418 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
|
4787
2ace1c4ee8da
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tonyp
parents:
4785
diff
changeset
|
4419 return _g1->handle_evacuation_failure_par(cl, old); |
| 342 | 4420 } |
| 4421 | |
| 526 | 4422 // We're going to allocate linearly, so might as well prefetch ahead. |
| 4423 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
| 4424 | |
| 342 | 4425 oop forward_ptr = old->forward_to_atomic(obj); |
| 4426 if (forward_ptr == NULL) { | |
| 4427 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
| 526 | 4428 if (g1p->track_object_age(alloc_purpose)) { |
| 4429 // We could simply do obj->incr_age(). However, this causes a | |
| 4430 // performance issue. obj->incr_age() will first check whether | |
| 4431 // the object has a displaced mark by checking its mark word; | |
| 4432 // getting the mark word from the new location of the object | |
| 4433 // stalls. So, given that we already have the mark word and we | |
| 4434 // are about to install it anyway, it's better to increase the | |
| 4435 // age on the mark word, when the object does not have a | |
| 4436 // displaced mark word. We're not expecting many objects to have | |
| 4437 // a displaced marked word, so that case is not optimized | |
| 4438 // further (it could be...) and we simply call obj->incr_age(). | |
| 4439 | |
| 4440 if (m->has_displaced_mark_helper()) { | |
| 4441 // in this case, we have to install the mark word first, | |
| 4442 // otherwise obj looks to be forwarded (the old mark word, | |
| 4443 // which contains the forward pointer, was copied) | |
| 4444 obj->set_mark(m); | |
| 4445 obj->incr_age(); | |
| 4446 } else { | |
| 4447 m = m->incr_age(); | |
| 545 | 4448 obj->set_mark(m); |
| 526 | 4449 } |
| 545 | 4450 _par_scan_state->age_table()->add(obj, word_sz); |
| 4451 } else { | |
| 4452 obj->set_mark(m); | |
| 526 | 4453 } |
| 4454 | |
| 342 | 4455 size_t* surv_young_words = _par_scan_state->surviving_young_words(); |
| 4456 surv_young_words[young_index] += word_sz; | |
| 4457 | |
| 4458 if (obj->is_objArray() && arrayOop(obj)->length() >= ParGCArrayScanChunk) { | |
|
4784
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changeset
|
4459 // 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
|
4460 // 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
|
4461 // 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
|
4462 arrayOop(obj)->set_length(0); |
|
845
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|
4463 oop* old_p = set_partial_array_mask(old); |
|
df6caf649ff7
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diff
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|
4464 _par_scan_state->push_on_queue(old_p); |
| 342 | 4465 } else { |
| 526 | 4466 // No point in using the slower heap_region_containing() method, |
| 4467 // given that we know obj is in the heap. | |
| 4468 _scanner->set_region(_g1->heap_region_containing_raw(obj)); | |
| 342 | 4469 obj->oop_iterate_backwards(_scanner); |
| 4470 } | |
| 4471 } else { | |
| 4472 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); | |
| 4473 obj = forward_ptr; | |
| 4474 } | |
| 4475 return obj; | |
| 4476 } | |
| 4477 | |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
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|
4478 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
|
845
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|
4479 template <class T> |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
johnc
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|
4480 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> |
|
845
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|
4481 ::do_oop_work(T* p) { |
|
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|
4482 oop obj = oopDesc::load_decode_heap_oop(p); |
| 342 | 4483 assert(barrier != G1BarrierRS || obj != NULL, |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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|
4484 "Precondition: G1BarrierRS implies obj is non-NULL"); |
|
3886
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|
4485 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
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diff
changeset
|
4486 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
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|
4487 |
| 526 | 4488 // here the null check is implicit in the cset_fast_test() test |
|
1261
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|
4489 if (_g1->in_cset_fast_test(obj)) { |
|
4787
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|
4490 oop forwardee; |
| 526 | 4491 if (obj->is_forwarded()) { |
|
4787
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|
4492 forwardee = obj->forwardee(); |
| 526 | 4493 } else { |
|
4787
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|
4494 forwardee = copy_to_survivor_space(obj); |
| 342 | 4495 } |
|
4787
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|
4496 assert(forwardee != NULL, "forwardee should not be NULL"); |
|
2ace1c4ee8da
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|
4497 oopDesc::encode_store_heap_oop(p, forwardee); |
|
2ace1c4ee8da
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changeset
|
4498 if (do_mark_object && forwardee != obj) { |
|
2ace1c4ee8da
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|
4499 // If the object is self-forwarded we don't need to explicitly |
|
2ace1c4ee8da
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|
4500 // 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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|
4501 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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|
4502 } |
|
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|
4503 |
| 526 | 4504 // When scanning the RS, we only care about objs in CS. |
| 4505 if (barrier == G1BarrierRS) { | |
|
4836
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changeset
|
4506 _par_scan_state->update_rs(_from, p, _worker_id); |
| 342 | 4507 } |
|
3886
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|
4508 } else { |
|
eeae91c9baba
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diff
changeset
|
4509 // 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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parents:
3869
diff
changeset
|
4510 // 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:
3869
diff
changeset
|
4511 // be true) then attempt to mark the object. |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4512 if (do_mark_object && _g1->is_in_g1_reserved(obj)) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
4513 mark_object(obj); |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
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diff
changeset
|
4514 } |
| 526 | 4515 } |
| 4516 | |
| 4517 if (barrier == G1BarrierEvac && obj != NULL) { | |
|
4836
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6484965: G1: piggy-back liveness accounting phase on marking
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parents:
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diff
changeset
|
4518 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4519 } |
| 4520 | |
| 4521 if (do_gen_barrier && obj != NULL) { | |
| 4522 par_do_barrier(p); | |
| 4523 } | |
| 4524 } | |
| 4525 | |
|
1261
0414c1049f15
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diff
changeset
|
4526 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(oop* p); |
|
0414c1049f15
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iveresov
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|
4527 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
|
845
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|
4528 |
|
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changeset
|
4529 template <class T> void G1ParScanPartialArrayClosure::do_oop_nv(T* p) { |
| 526 | 4530 assert(has_partial_array_mask(p), "invariant"); |
|
4784
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7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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changeset
|
4531 oop from_obj = clear_partial_array_mask(p); |
|
02838862dec8
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|
4532 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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changeset
|
4533 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
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changeset
|
4534 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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changeset
|
4535 objArrayOop from_obj_array = objArrayOop(from_obj); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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changeset
|
4536 // The from-space object contains the real length. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
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diff
changeset
|
4537 int length = from_obj_array->length(); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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changeset
|
4538 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
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diff
changeset
|
4539 assert(from_obj->is_forwarded(), "must be forwarded"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
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diff
changeset
|
4540 oop to_obj = from_obj->forwardee(); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
4783
diff
changeset
|
4541 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
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parents:
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diff
changeset
|
4542 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:
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diff
changeset
|
4543 // 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
|
4544 // to-space object. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4545 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
|
4546 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
|
4547 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
|
4548 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
4783
diff
changeset
|
4549 int start = next_index; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
4783
diff
changeset
|
4550 int end = length; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4551 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
|
4552 // We'll try not to push a range that's smaller than ParGCArrayScanChunk. |
| 342 | 4553 if (remainder > 2 * ParGCArrayScanChunk) { |
| 4554 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
|
4555 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
|
4556 // 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
|
4557 // worker has run out of things to do and can steal it. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4558 oop* from_obj_p = set_partial_array_mask(from_obj); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
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diff
changeset
|
4559 _par_scan_state->push_on_queue(from_obj_p); |
| 342 | 4560 } else { |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4561 assert(length == end, "sanity"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4562 // We'll process the final range for this object. Restore the length |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4563 // 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
|
4564 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
|
4565 } |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
4783
diff
changeset
|
4566 _scanner.set_region(_g1->heap_region_containing_raw(to_obj)); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4567 // Process indexes [start,end). It will also process the header |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4568 // 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
|
4569 // 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
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4783
diff
changeset
|
4570 // 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
|
4571 // 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
|
4572 // 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
|
4573 // 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
|
4574 // 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
|
4575 to_obj_array->oop_iterate_range(&_scanner, start, end); |
| 342 | 4576 } |
| 4577 | |
| 4578 class G1ParEvacuateFollowersClosure : public VoidClosure { | |
| 4579 protected: | |
| 4580 G1CollectedHeap* _g1h; | |
| 4581 G1ParScanThreadState* _par_scan_state; | |
| 4582 RefToScanQueueSet* _queues; | |
| 4583 ParallelTaskTerminator* _terminator; | |
| 4584 | |
| 4585 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4586 RefToScanQueueSet* queues() { return _queues; } | |
| 4587 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4588 | |
| 4589 public: | |
| 4590 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4591 G1ParScanThreadState* par_scan_state, | |
| 4592 RefToScanQueueSet* queues, | |
| 4593 ParallelTaskTerminator* terminator) | |
| 4594 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4595 _queues(queues), _terminator(terminator) {} | |
| 4596 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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1861
diff
changeset
|
4597 void do_void(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4598 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
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1861
diff
changeset
|
4599 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4600 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4601 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4602 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4603 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4604 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4605 pss->start_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4606 const bool res = terminator()->offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4607 pss->end_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4608 return res; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4609 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4610 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4611 void G1ParEvacuateFollowersClosure::do_void() { |
|
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|
4612 StarTask stolen_task; |
|
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|
4613 G1ParScanThreadState* const pss = par_scan_state(); |
|
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4614 pss->trim_queue(); |
|
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|
4615 |
|
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|
4616 do { |
|
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|
4617 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
|
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|
4618 assert(pss->verify_task(stolen_task), "sanity"); |
|
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|
4619 if (stolen_task.is_narrow()) { |
|
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|
4620 pss->deal_with_reference((narrowOop*) stolen_task); |
|
1862
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|
4621 } else { |
|
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|
4622 pss->deal_with_reference((oop*) stolen_task); |
|
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|
4623 } |
|
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4624 |
|
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|
4625 // We've just processed a reference and we might have made |
|
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|
4626 // available new entries on the queues. So we have to make sure |
|
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|
4627 // we drain the queues as necessary. |
| 342 | 4628 pss->trim_queue(); |
| 4629 } | |
|
1862
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|
4630 } while (!offer_termination()); |
|
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|
4631 |
|
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|
4632 pss->retire_alloc_buffers(); |
|
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|
4633 } |
| 342 | 4634 |
| 4635 class G1ParTask : public AbstractGangTask { | |
| 4636 protected: | |
| 4637 G1CollectedHeap* _g1h; | |
| 4638 RefToScanQueueSet *_queues; | |
| 4639 ParallelTaskTerminator _terminator; | |
|
4728
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|
4640 uint _n_workers; |
| 342 | 4641 |
| 4642 Mutex _stats_lock; | |
| 4643 Mutex* stats_lock() { return &_stats_lock; } | |
| 4644 | |
| 4645 size_t getNCards() { | |
| 4646 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 4647 / G1BlockOffsetSharedArray::N_bytes; | |
| 4648 } | |
| 4649 | |
| 4650 public: | |
|
4095
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|
4651 G1ParTask(G1CollectedHeap* g1h, |
|
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|
4652 RefToScanQueueSet *task_queues) |
| 342 | 4653 : AbstractGangTask("G1 collection"), |
| 4654 _g1h(g1h), | |
| 4655 _queues(task_queues), | |
|
4095
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|
4656 _terminator(0, _queues), |
|
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|
4657 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4658 {} |
| 4659 | |
| 4660 RefToScanQueueSet* queues() { return _queues; } | |
| 4661 | |
| 4662 RefToScanQueue *work_queue(int i) { | |
| 4663 return queues()->queue(i); | |
| 4664 } | |
| 4665 | |
|
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|
4666 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
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|
4667 |
|
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|
4668 virtual void set_for_termination(int active_workers) { |
|
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|
4669 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
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|
4670 // in the young space (_par_seq_tasks) in the G1 heap |
|
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|
4671 // for SequentialSubTasksDone. |
|
bca17e38de00
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|
4672 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
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|
4673 // both of which need setting by set_n_termination(). |
|
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|
4674 _g1h->SharedHeap::set_n_termination(active_workers); |
|
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|
4675 _g1h->set_n_termination(active_workers); |
|
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|
4676 terminator()->reset_for_reuse(active_workers); |
|
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|
4677 _n_workers = active_workers; |
|
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|
4678 } |
|
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|
4679 |
|
4728
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|
4680 void work(uint worker_id) { |
|
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diff
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|
4681 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 4682 |
| 4683 double start_time_ms = os::elapsedTime() * 1000.0; | |
|
4728
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|
4684 _g1h->g1_policy()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 4685 |
| 342 | 4686 ResourceMark rm; |
| 4687 HandleMark hm; | |
| 4688 | |
|
3979
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|
4689 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
4dfb2df418f2
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|
4690 |
|
4728
441e946dc1af
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diff
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|
4691 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
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|
4692 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, rp); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
4693 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
4694 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, rp); |
| 342 | 4695 |
| 4696 pss.set_evac_closure(&scan_evac_cl); | |
| 4697 pss.set_evac_failure_closure(&evac_failure_cl); | |
| 4698 pss.set_partial_scan_closure(&partial_scan_cl); | |
| 4699 | |
|
3979
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6484982: G1: process references during evacuation pauses
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|
4700 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
4701 G1ParScanPermClosure only_scan_perm_cl(_g1h, &pss, rp); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
4702 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
4703 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
4704 G1ParScanAndMarkPermClosure scan_mark_perm_cl(_g1h, &pss, rp); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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changeset
|
4705 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
4706 OopClosure* scan_root_cl = &only_scan_root_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
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changeset
|
4707 OopsInHeapRegionClosure* scan_perm_cl = &only_scan_perm_cl; |
| 342 | 4708 |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
4709 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
4710 // We also need to mark copied objects. |
| 342 | 4711 scan_root_cl = &scan_mark_root_cl; |
| 4712 scan_perm_cl = &scan_mark_perm_cl; | |
| 4713 } | |
| 4714 | |
|
3983
811ec3d0833b
7097053: G1: assert(da ? referent->is_oop() : referent->is_oop_or_null()) failed: referenceProcessor.cpp:1054
johnc
parents:
3982
diff
changeset
|
4715 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
4716 |
| 342 | 4717 pss.start_strong_roots(); |
| 4718 _g1h->g1_process_strong_roots(/* not collecting perm */ false, | |
| 4719 SharedHeap::SO_AllClasses, | |
| 4720 scan_root_cl, | |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4721 &push_heap_rs_cl, |
| 342 | 4722 scan_perm_cl, |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4723 worker_id); |
| 342 | 4724 pss.end_strong_roots(); |
|
3823
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|
4725 |
| 342 | 4726 { |
| 4727 double start = os::elapsedTime(); | |
| 4728 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); | |
| 4729 evac.do_void(); | |
| 4730 double elapsed_ms = (os::elapsedTime()-start)*1000.0; | |
| 4731 double term_ms = pss.term_time()*1000.0; | |
|
4728
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jmasa
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4711
diff
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|
4732 _g1h->g1_policy()->record_obj_copy_time(worker_id, elapsed_ms-term_ms); |
|
441e946dc1af
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jmasa
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4711
diff
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|
4733 _g1h->g1_policy()->record_termination(worker_id, term_ms, pss.term_attempts()); |
| 342 | 4734 } |
| 1282 | 4735 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
| 342 | 4736 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
| 4737 | |
| 4738 // Clean up any par-expanded rem sets. | |
| 4739 HeapRegionRemSet::par_cleanup(); | |
| 4740 | |
| 4741 if (ParallelGCVerbose) { | |
| 1709 | 4742 MutexLocker x(stats_lock()); |
|
4728
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7121618: Change type of number of GC workers to unsigned int.
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4711
diff
changeset
|
4743 pss.print_termination_stats(worker_id); |
| 342 | 4744 } |
| 4745 | |
|
1862
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|
4746 assert(pss.refs()->is_empty(), "should be empty"); |
| 1611 | 4747 double end_time_ms = os::elapsedTime() * 1000.0; |
|
4728
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diff
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|
4748 _g1h->g1_policy()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 4749 } |
| 4750 }; | |
| 4751 | |
| 4752 // *** Common G1 Evacuation Stuff | |
| 4753 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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1755
diff
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|
4754 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
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|
4755 |
| 342 | 4756 void |
| 4757 G1CollectedHeap:: | |
| 4758 g1_process_strong_roots(bool collecting_perm_gen, | |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
4759 ScanningOption so, |
| 342 | 4760 OopClosure* scan_non_heap_roots, |
| 4761 OopsInHeapRegionClosure* scan_rs, | |
| 4762 OopsInGenClosure* scan_perm, | |
| 4763 int worker_i) { | |
|
3979
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|
4764 |
| 342 | 4765 // First scan the strong roots, including the perm gen. |
| 4766 double ext_roots_start = os::elapsedTime(); | |
| 4767 double closure_app_time_sec = 0.0; | |
| 4768 | |
| 4769 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
| 4770 BufferingOopsInGenClosure buf_scan_perm(scan_perm); | |
| 4771 buf_scan_perm.set_generation(perm_gen()); | |
| 4772 | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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diff
changeset
|
4773 // Walk the code cache w/o buffering, because StarTask cannot handle |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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diff
changeset
|
4774 // unaligned oop locations. |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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890
diff
changeset
|
4775 CodeBlobToOopClosure eager_scan_code_roots(scan_non_heap_roots, /*do_marking=*/ true); |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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890
diff
changeset
|
4776 |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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890
diff
changeset
|
4777 process_strong_roots(false, // no scoping; this is parallel code |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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890
diff
changeset
|
4778 collecting_perm_gen, so, |
| 342 | 4779 &buf_scan_non_heap_roots, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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890
diff
changeset
|
4780 &eager_scan_code_roots, |
| 342 | 4781 &buf_scan_perm); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
4782 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
4783 // Now the CM ref_processor roots. |
|
3823
14a2fd14c0db
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|
4784 if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) { |
|
3979
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
4785 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
4786 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
4787 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
4788 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
4789 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
|
3823
14a2fd14c0db
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|
4790 } |
|
14a2fd14c0db
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diff
changeset
|
4791 |
|
14a2fd14c0db
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3778
diff
changeset
|
4792 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 4793 buf_scan_non_heap_roots.done(); |
| 4794 buf_scan_perm.done(); | |
|
3823
14a2fd14c0db
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|
4795 |
| 342 | 4796 double ext_roots_end = os::elapsedTime(); |
|
3823
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|
4797 |
| 342 | 4798 g1_policy()->reset_obj_copy_time(worker_i); |
|
3823
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|
4799 double obj_copy_time_sec = buf_scan_perm.closure_app_seconds() + |
|
14a2fd14c0db
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|
4800 buf_scan_non_heap_roots.closure_app_seconds(); |
| 342 | 4801 g1_policy()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
|
3823
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|
4802 |
| 342 | 4803 double ext_root_time_ms = |
| 4804 ((ext_roots_end - ext_roots_start) - obj_copy_time_sec) * 1000.0; | |
|
3823
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|
4805 |
| 342 | 4806 g1_policy()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 4807 | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4808 // During conc marking we have to filter the per-thread SATB buffers |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4809 // 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
|
4810 // as implicitly live). |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4811 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
|
4812 if (mark_in_progress()) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4813 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4814 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4815 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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diff
changeset
|
4816 double satb_filtering_ms = (os::elapsedTime() - ext_roots_end) * 1000.0; |
|
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diff
changeset
|
4817 g1_policy()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 4818 |
| 4819 // Now scan the complement of the collection set. | |
| 4820 if (scan_rs != NULL) { | |
| 4821 g1_rem_set()->oops_into_collection_set_do(scan_rs, worker_i); | |
| 4822 } | |
|
3823
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|
4823 |
| 342 | 4824 _process_strong_tasks->all_tasks_completed(); |
| 4825 } | |
| 4826 | |
| 4827 void | |
| 4828 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure, | |
| 4829 OopClosure* non_root_closure) { | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4830 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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diff
changeset
|
4831 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs, non_root_closure); |
| 342 | 4832 } |
| 4833 | |
|
3979
4dfb2df418f2
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|
4834 // Weak Reference Processing support |
|
4dfb2df418f2
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changeset
|
4835 |
|
4dfb2df418f2
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changeset
|
4836 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
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|
4837 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
4838 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4839 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
4840 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
4841 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4842 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4843 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4844 void do_object(oop p) { assert(false, "Do not call."); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4845 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4846 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4847 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4848 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4849 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4850 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4851 }; |
|
4dfb2df418f2
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changeset
|
4852 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4853 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4854 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
4855 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4856 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4857 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
4858 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4859 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4860 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4861 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4862 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4863 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
4864 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4865 void do_oop( oop* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4866 oop obj = *p; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4867 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4868 if (_g1->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4869 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4870 *p = obj->forwardee(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4871 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4872 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4873 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4874 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4875 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4876 // serial and parallel code as long as different worker |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4877 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4878 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4879 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4880 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4881 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4882 OopClosure* _copy_non_heap_obj_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4883 OopsInHeapRegionClosure* _copy_perm_obj_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4884 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4885 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4886 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4887 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4888 OopClosure* non_heap_obj_cl, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4889 OopsInHeapRegionClosure* perm_obj_cl, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4890 G1ParScanThreadState* pss): |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4891 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4892 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4893 _copy_perm_obj_cl(perm_obj_cl), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4894 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4895 {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4896 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4897 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4898 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4899 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4900 template <class T> void do_oop_work(T* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4901 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4902 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4903 if (_g1h->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4904 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4905 // to a new location or to itself in the event of an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4906 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4907 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4908 // heap, update the RSet for the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4909 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4910 // If the referent has not been forwarded then we have to keep |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4911 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4912 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4913 // If the reference field is in the G1 heap then we can push |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4914 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4915 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4916 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4917 // new location, and the RSet updated. Otherwise we need to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4918 // use the the non-heap or perm closures directly to copy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4919 // the refernt object and update the pointer, while avoiding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4920 // updating the RSet. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4921 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4922 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4923 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4924 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4925 // The reference field is not in the G1 heap. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4926 if (_g1h->perm_gen()->is_in(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4927 _copy_perm_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4928 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4929 _copy_non_heap_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4930 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4931 } |
|
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parents:
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diff
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|
4932 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4933 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4934 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4935 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4936 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
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parents:
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changeset
|
4937 // closure for each discovered list in some of the |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4938 // reference processing phases. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4939 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4940 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4941 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4942 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
4943 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4944 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4945 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4946 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4947 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4948 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4949 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4950 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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|
4951 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4952 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4953 void do_void() { |
|
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parents:
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diff
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|
4954 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4955 pss->trim_queue(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
4956 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4957 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4958 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4959 // Parallel Reference Processing closures |
|
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parents:
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diff
changeset
|
4960 |
|
4dfb2df418f2
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parents:
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diff
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|
4961 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
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parents:
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diff
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|
4962 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4963 |
|
4dfb2df418f2
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parents:
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|
4964 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
4dfb2df418f2
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parents:
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|
4965 private: |
|
4dfb2df418f2
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parents:
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diff
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|
4966 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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|
4967 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
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|
4968 FlexibleWorkGang* _workers; |
|
3979
4dfb2df418f2
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parents:
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|
4969 int _active_workers; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4970 |
|
4dfb2df418f2
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parents:
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diff
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|
4971 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4972 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
bca17e38de00
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parents:
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diff
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|
4973 FlexibleWorkGang* workers, |
|
3979
4dfb2df418f2
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parents:
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|
4974 RefToScanQueueSet *task_queues, |
|
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parents:
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diff
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|
4975 int n_workers) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4976 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4977 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4978 _workers(workers), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4979 _active_workers(n_workers) |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4980 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4981 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
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parents:
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|
4982 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4983 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4984 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4985 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4986 virtual void execute(EnqueueTask& task); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4987 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4988 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4989 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4990 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4991 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
4992 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
4993 ProcessTask& _proc_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4994 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
4995 RefToScanQueueSet *_task_queues; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4996 ParallelTaskTerminator* _terminator; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4997 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4998 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4999 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5000 G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5001 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5002 ParallelTaskTerminator* terminator) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5003 AbstractGangTask("Process reference objects in parallel"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5004 _proc_task(proc_task), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5005 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5006 _task_queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5007 _terminator(terminator) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5008 {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5009 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5010 virtual void work(uint worker_id) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5011 // The reference processing task executed by a single worker. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5012 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5013 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5014 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5015 G1STWIsAliveClosure is_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5016 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5017 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5018 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5019 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5020 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5021 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5022 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5023 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5024 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5025 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5026 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5027 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5028 G1ParScanPermClosure only_copy_perm_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5029 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5030 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5031 G1ParScanAndMarkPermClosure copy_mark_perm_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5032 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5033 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5034 OopsInHeapRegionClosure* copy_perm_cl = &only_copy_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5035 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5036 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5037 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5038 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5039 copy_perm_cl = ©_mark_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5040 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5041 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5042 // Keep alive closure. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5043 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_perm_cl, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5044 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5045 // Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5046 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5047 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5048 // Call the reference processing task's work routine. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5049 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5050 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5051 // Note we cannot assert that the refs array is empty here as not all |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5052 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5053 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5054 // the queue may not be empty. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5055 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5056 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5057 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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|
5058 // Driver routine for parallel reference processing. |
|
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|
5059 // Creates an instance of the ref processing gang |
|
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|
5060 // task and has the worker threads execute it. |
|
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|
5061 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
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|
5062 assert(_workers != NULL, "Need parallel worker threads."); |
|
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|
5063 |
|
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|
5064 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
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|
5065 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
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|
5066 |
|
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|
5067 _g1h->set_par_threads(_active_workers); |
|
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|
5068 _workers->run_task(&proc_task_proxy); |
|
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|
5069 _g1h->set_par_threads(0); |
|
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|
5070 } |
|
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|
5071 |
|
4dfb2df418f2
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|
5072 // Gang task for parallel reference enqueueing. |
|
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changeset
|
5073 |
|
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|
5074 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
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|
5075 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
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|
5076 EnqueueTask& _enq_task; |
|
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|
5077 |
|
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|
5078 public: |
|
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|
5079 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
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|
5080 AbstractGangTask("Enqueue reference objects in parallel"), |
|
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|
5081 _enq_task(enq_task) |
|
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|
5082 { } |
|
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|
5083 |
|
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|
5084 virtual void work(uint worker_id) { |
|
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|
5085 _enq_task.work(worker_id); |
|
3979
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|
5086 } |
|
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|
5087 }; |
|
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|
5088 |
|
4dfb2df418f2
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|
5089 // Driver routine for parallel reference enqueing. |
|
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|
5090 // Creates an instance of the ref enqueueing gang |
|
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|
5091 // task and has the worker threads execute it. |
|
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|
5092 |
|
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|
5093 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
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|
5094 assert(_workers != NULL, "Need parallel worker threads."); |
|
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|
5095 |
|
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|
5096 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
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|
5097 |
|
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|
5098 _g1h->set_par_threads(_active_workers); |
|
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|
5099 _workers->run_task(&enq_task_proxy); |
|
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|
5100 _g1h->set_par_threads(0); |
|
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|
5101 } |
|
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|
5102 |
|
4dfb2df418f2
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|
5103 // End of weak reference support closures |
|
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|
5104 |
|
4dfb2df418f2
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|
5105 // Abstract task used to preserve (i.e. copy) any referent objects |
|
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|
5106 // that are in the collection set and are pointed to by reference |
|
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|
5107 // objects discovered by the CM ref processor. |
|
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|
5108 |
|
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|
5109 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
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|
5110 protected: |
|
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|
5111 G1CollectedHeap* _g1h; |
|
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|
5112 RefToScanQueueSet *_queues; |
|
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|
5113 ParallelTaskTerminator _terminator; |
|
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|
5114 uint _n_workers; |
|
3979
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|
5115 |
|
4dfb2df418f2
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|
5116 public: |
|
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|
5117 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
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|
5118 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
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|
5119 _g1h(g1h), |
|
4dfb2df418f2
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diff
changeset
|
5120 _queues(task_queues), |
|
4dfb2df418f2
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|
5121 _terminator(workers, _queues), |
|
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|
5122 _n_workers(workers) |
|
4dfb2df418f2
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|
5123 { } |
|
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|
5124 |
|
4728
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|
5125 void work(uint worker_id) { |
|
3979
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|
5126 ResourceMark rm; |
|
4dfb2df418f2
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diff
changeset
|
5127 HandleMark hm; |
|
4dfb2df418f2
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|
5128 |
|
4728
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jmasa
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|
5129 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
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|
5130 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
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|
5131 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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|
5132 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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changeset
|
5133 |
|
4dfb2df418f2
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diff
changeset
|
5134 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
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|
5135 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
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|
5136 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
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|
5137 |
|
4dfb2df418f2
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changeset
|
5138 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
|
4dfb2df418f2
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changeset
|
5139 |
|
4dfb2df418f2
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diff
changeset
|
5140 |
|
4dfb2df418f2
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diff
changeset
|
5141 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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|
5142 G1ParScanPermClosure only_copy_perm_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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changeset
|
5143 |
|
4dfb2df418f2
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diff
changeset
|
5144 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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|
5145 G1ParScanAndMarkPermClosure copy_mark_perm_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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changeset
|
5146 |
|
4dfb2df418f2
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diff
changeset
|
5147 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
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|
5148 OopsInHeapRegionClosure* copy_perm_cl = &only_copy_perm_cl; |
|
4dfb2df418f2
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|
5149 |
|
4dfb2df418f2
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diff
changeset
|
5150 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
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|
5151 // We also need to mark copied objects. |
|
4dfb2df418f2
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diff
changeset
|
5152 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
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|
5153 copy_perm_cl = ©_mark_perm_cl; |
|
4dfb2df418f2
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|
5154 } |
|
4dfb2df418f2
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diff
changeset
|
5155 |
|
4dfb2df418f2
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diff
changeset
|
5156 // Is alive closure |
|
4dfb2df418f2
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diff
changeset
|
5157 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
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diff
changeset
|
5158 |
|
4dfb2df418f2
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diff
changeset
|
5159 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
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|
5160 // to be copied. |
|
4dfb2df418f2
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changeset
|
5161 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_perm_cl, &pss); |
|
4dfb2df418f2
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changeset
|
5162 |
|
4dfb2df418f2
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diff
changeset
|
5163 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
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|
5164 |
|
4728
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changeset
|
5165 uint limit = ReferenceProcessor::number_of_subclasses_of_ref() * rp->max_num_q(); |
|
441e946dc1af
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|
5166 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
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changeset
|
5167 |
|
4dfb2df418f2
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diff
changeset
|
5168 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
|
4dfb2df418f2
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|
5169 // So this must be true - but assert just in case someone decides to |
|
4dfb2df418f2
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|
5170 // change the worker ids. |
|
4728
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|
5171 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
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|
5172 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
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changeset
|
5173 |
|
4dfb2df418f2
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changeset
|
5174 // Select discovered lists [i, i+stride, i+2*stride,...,limit) |
|
4728
441e946dc1af
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jmasa
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changeset
|
5175 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5176 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
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changeset
|
5177 |
|
4dfb2df418f2
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diff
changeset
|
5178 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
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changeset
|
5179 while (iter.has_next()) { |
|
4dfb2df418f2
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diff
changeset
|
5180 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
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changeset
|
5181 // can see some null referent objects. |
|
4dfb2df418f2
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diff
changeset
|
5182 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5183 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5184 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5185 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5186 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5187 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5188 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5189 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5190 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5191 } |
|
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 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5194 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5195 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5196 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5197 assert(pss.refs()->is_empty(), "should be"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5198 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5199 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5200 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5201 // Weak Reference processing during an evacuation pause (part 1). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5202 void G1CollectedHeap::process_discovered_references() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5203 double ref_proc_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5204 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5205 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5206 assert(rp->discovery_enabled(), "should have been enabled"); |
|
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 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5209 // 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
|
5210 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5211 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5212 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5213 // 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
|
5214 // 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
|
5215 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5216 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5217 // but would not have treated the reference object as a regular oop. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5218 // As a reult the copy closure would not have been applied to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5219 // referent object. |
|
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 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5222 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5223 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5224 // 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
|
5225 // 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
|
5226 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5227 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5228 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5229 uint active_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5230 workers()->active_workers() : 1); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5231 |
| 4711 | 5232 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 5233 active_workers == workers()->active_workers(), | |
| 5234 "Need to reset active_workers"); | |
| 5235 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5236 set_par_threads(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5237 G1ParPreserveCMReferentsTask keep_cm_referents(this, active_workers, _task_queues); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5238 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5239 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5240 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5241 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5242 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5243 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5244 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5245 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5246 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5247 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5248 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5249 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5250 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5251 // 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
|
5252 // 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
|
5253 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5254 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5255 // Use only a single queue for this PSS. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5256 G1ParScanThreadState pss(this, 0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5257 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5258 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5259 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5260 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5261 G1ParScanHeapEvacClosure scan_evac_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5262 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5263 G1ParScanPartialArrayClosure partial_scan_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5264 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5265 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5266 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5267 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5268 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5269 assert(pss.refs()->is_empty(), "pre-condition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5270 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5271 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5272 G1ParScanPermClosure only_copy_perm_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5273 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5274 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5275 G1ParScanAndMarkPermClosure copy_mark_perm_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5276 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5277 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5278 OopsInHeapRegionClosure* copy_perm_cl = &only_copy_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5279 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5280 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5281 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5282 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5283 copy_perm_cl = ©_mark_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5284 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5285 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5286 // Keep alive closure. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5287 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, copy_perm_cl, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5288 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5289 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5290 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5291 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5292 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5293 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5294 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5295 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5296 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5297 rp->process_discovered_references(&is_alive, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5298 &keep_alive, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5299 &drain_queue, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5300 NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5301 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5302 // Parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5303 assert(rp->num_q() == active_workers, "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5304 assert(active_workers <= rp->max_num_q(), "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5305 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5306 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5307 rp->process_discovered_references(&is_alive, &keep_alive, &drain_queue, &par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5308 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5309 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5310 // We have completed copying any necessary live referent objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5311 // (that were not copied during the actual pause) so we can |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5312 // retire any active alloc buffers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5313 pss.retire_alloc_buffers(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5314 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
|
5315 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5316 double ref_proc_time = os::elapsedTime() - ref_proc_start; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5317 g1_policy()->record_ref_proc_time(ref_proc_time * 1000.0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5318 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5319 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5320 // Weak Reference processing during an evacuation pause (part 2). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5321 void G1CollectedHeap::enqueue_discovered_references() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5322 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5323 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5324 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5325 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
|
5326 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5327 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5328 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5329 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5330 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5331 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5332 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5333 // Parallel reference enqueuing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5334 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5335 uint active_workers = (ParallelGCThreads > 0 ? workers()->active_workers() : 1); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5336 assert(active_workers == workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5337 "Need to reset active_workers"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5338 assert(rp->num_q() == active_workers, "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5339 assert(active_workers <= rp->max_num_q(), "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5340 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5341 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5342 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5343 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5345 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 // 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
|
5350 // Should we do that here also? We could, but it is a serial operation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 // and could signicantly increase the pause time. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 double ref_enq_time = os::elapsedTime() - ref_enq_start; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5354 g1_policy()->record_ref_enq_time(ref_enq_time * 1000.0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5355 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5356 |
| 342 | 5357 void G1CollectedHeap::evacuate_collection_set() { |
|
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
5358 _expand_heap_after_alloc_failure = true; |
| 342 | 5359 set_evacuation_failed(false); |
| 5360 | |
| 5361 g1_rem_set()->prepare_for_oops_into_collection_set_do(); | |
| 5362 concurrent_g1_refine()->set_use_cache(false); | |
| 889 | 5363 concurrent_g1_refine()->clear_hot_cache_claimed_index(); |
| 5364 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5365 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5366 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5367 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5368 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5369 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5370 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5371 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5372 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5373 "If not dynamic should be using all the workers"); |
| 4711 | 5374 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5375 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5376 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5377 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5378 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5379 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5380 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5381 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5382 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5383 |
| 5384 init_for_evac_failure(NULL); | |
| 5385 | |
| 5386 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
|
5387 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5388 assert(dirty_card_queue_set().completed_buffers_num() == 0, "Should be empty"); |
| 342 | 5389 double start_par = os::elapsedTime(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5391 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 5392 // The individual threads will set their evac-failure closures. |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5393 StrongRootsScope srs(this); |
| 1709 | 5394 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5395 // These tasks use ShareHeap::_process_strong_tasks |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5396 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5397 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5398 "If not dynamic should be using all the workers"); |
| 342 | 5399 workers()->run_task(&g1_par_task); |
| 5400 } else { | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5401 StrongRootsScope srs(this); |
| 4711 | 5402 g1_par_task.set_for_termination(n_workers); |
| 342 | 5403 g1_par_task.work(0); |
| 5404 } | |
| 5405 | |
| 5406 double par_time = (os::elapsedTime() - start_par) * 1000.0; | |
| 5407 g1_policy()->record_par_time(par_time); | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5408 |
| 342 | 5409 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5410 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5411 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5412 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5413 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5414 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5415 // not copied during the pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5416 process_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5417 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5418 // Weak root processing. |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5419 // 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
|
5420 // 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
|
5421 // here too. |
| 342 | 5422 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 G1STWIsAliveClosure is_alive(this); |
| 342 | 5424 G1KeepAliveClosure keep_alive(this); |
| 5425 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 5426 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5427 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5428 release_gc_alloc_regions(); |
| 342 | 5429 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
|
5430 |
| 889 | 5431 concurrent_g1_refine()->clear_hot_cache(); |
| 342 | 5432 concurrent_g1_refine()->set_use_cache(true); |
| 5433 | |
| 5434 finalize_for_evac_failure(); | |
| 5435 | |
| 5436 if (evacuation_failed()) { | |
| 5437 remove_self_forwarding_pointers(); | |
| 5438 if (PrintGCDetails) { | |
|
1719
b63010841f78
6975964: G1: print out a more descriptive message for evacuation failure when +PrintGCDetails is set
tonyp
parents:
1718
diff
changeset
|
5439 gclog_or_tty->print(" (to-space overflow)"); |
| 342 | 5440 } else if (PrintGC) { |
| 5441 gclog_or_tty->print("--"); | |
| 5442 } | |
| 5443 } | |
| 5444 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 // this after the card table is cleaned (and verified) as |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5448 // the act of enqueuing entries on to the pending list |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5450 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5451 // RSets. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5452 enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5453 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5454 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5455 RedirtyLoggedCardTableEntryFastClosure redirty; |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5456 dirty_card_queue_set().set_closure(&redirty); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5457 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
| 1111 | 5458 |
| 5459 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); | |
| 5460 dcq.merge_bufferlists(&dirty_card_queue_set()); | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5461 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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|
5462 } |
| 342 | 5463 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5464 } | |
| 5465 | |
| 2173 | 5466 void G1CollectedHeap::free_region_if_empty(HeapRegion* hr, |
| 2152 | 5467 size_t* pre_used, |
| 5468 FreeRegionList* free_list, | |
| 4072 | 5469 OldRegionSet* old_proxy_set, |
| 2152 | 5470 HumongousRegionSet* humongous_proxy_set, |
| 2173 | 5471 HRRSCleanupTask* hrrs_cleanup_task, |
| 2152 | 5472 bool par) { |
| 5473 if (hr->used() > 0 && hr->max_live_bytes() == 0 && !hr->is_young()) { | |
| 5474 if (hr->isHumongous()) { | |
| 5475 assert(hr->startsHumongous(), "we should only see starts humongous"); | |
| 5476 free_humongous_region(hr, pre_used, free_list, humongous_proxy_set, par); | |
| 5477 } else { | |
| 4072 | 5478 _old_set.remove_with_proxy(hr, old_proxy_set); |
| 2152 | 5479 free_region(hr, pre_used, free_list, par); |
| 342 | 5480 } |
| 2173 | 5481 } else { |
| 5482 hr->rem_set()->do_cleanup_work(hrrs_cleanup_task); | |
| 342 | 5483 } |
| 5484 } | |
| 5485 | |
| 2152 | 5486 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5487 size_t* pre_used, | |
| 5488 FreeRegionList* free_list, | |
| 5489 bool par) { | |
| 5490 assert(!hr->isHumongous(), "this is only for non-humongous regions"); | |
| 5491 assert(!hr->is_empty(), "the region should not be empty"); | |
| 5492 assert(free_list != NULL, "pre-condition"); | |
| 5493 | |
| 5494 *pre_used += hr->used(); | |
| 5495 hr->hr_clear(par, true /* clear_space */); | |
|
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|
5496 free_list->add_as_head(hr); |
| 2152 | 5497 } |
| 5498 | |
| 5499 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5500 size_t* pre_used, | |
| 5501 FreeRegionList* free_list, | |
| 5502 HumongousRegionSet* humongous_proxy_set, | |
| 5503 bool par) { | |
| 5504 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 5505 assert(free_list != NULL, "pre-condition"); | |
| 5506 assert(humongous_proxy_set != NULL, "pre-condition"); | |
| 5507 | |
| 5508 size_t hr_used = hr->used(); | |
| 5509 size_t hr_capacity = hr->capacity(); | |
| 5510 size_t hr_pre_used = 0; | |
| 5511 _humongous_set.remove_with_proxy(hr, humongous_proxy_set); | |
| 5512 hr->set_notHumongous(); | |
| 5513 free_region(hr, &hr_pre_used, free_list, par); | |
| 5514 | |
| 3766 | 5515 size_t i = hr->hrs_index() + 1; |
| 2152 | 5516 size_t num = 1; |
| 3766 | 5517 while (i < n_regions()) { |
| 5518 HeapRegion* curr_hr = region_at(i); | |
| 2152 | 5519 if (!curr_hr->continuesHumongous()) { |
| 5520 break; | |
| 5521 } | |
| 5522 curr_hr->set_notHumongous(); | |
| 5523 free_region(curr_hr, &hr_pre_used, free_list, par); | |
| 5524 num += 1; | |
| 5525 i += 1; | |
| 5526 } | |
| 5527 assert(hr_pre_used == hr_used, | |
| 5528 err_msg("hr_pre_used: "SIZE_FORMAT" and hr_used: "SIZE_FORMAT" " | |
| 5529 "should be the same", hr_pre_used, hr_used)); | |
| 5530 *pre_used += hr_pre_used; | |
| 5531 } | |
| 5532 | |
| 5533 void G1CollectedHeap::update_sets_after_freeing_regions(size_t pre_used, | |
| 5534 FreeRegionList* free_list, | |
| 4072 | 5535 OldRegionSet* old_proxy_set, |
| 2152 | 5536 HumongousRegionSet* humongous_proxy_set, |
| 5537 bool par) { | |
| 5538 if (pre_used > 0) { | |
| 5539 Mutex* lock = (par) ? ParGCRareEvent_lock : NULL; | |
| 342 | 5540 MutexLockerEx x(lock, Mutex::_no_safepoint_check_flag); |
| 2152 | 5541 assert(_summary_bytes_used >= pre_used, |
| 5542 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" " | |
| 5543 "should be >= pre_used: "SIZE_FORMAT, | |
| 5544 _summary_bytes_used, pre_used)); | |
| 342 | 5545 _summary_bytes_used -= pre_used; |
| 2152 | 5546 } |
| 5547 if (free_list != NULL && !free_list->is_empty()) { | |
| 5548 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
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|
5549 _free_list.add_as_head(free_list); |
| 2152 | 5550 } |
| 4072 | 5551 if (old_proxy_set != NULL && !old_proxy_set->is_empty()) { |
| 5552 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5553 _old_set.update_from_proxy(old_proxy_set); | |
| 5554 } | |
| 2152 | 5555 if (humongous_proxy_set != NULL && !humongous_proxy_set->is_empty()) { |
| 5556 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5557 _humongous_set.update_from_proxy(humongous_proxy_set); | |
| 342 | 5558 } |
| 5559 } | |
| 5560 | |
|
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|
5561 class G1ParCleanupCTTask : public AbstractGangTask { |
|
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|
5562 CardTableModRefBS* _ct_bs; |
|
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|
5563 G1CollectedHeap* _g1h; |
|
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|
5564 HeapRegion* volatile _su_head; |
|
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|
5565 public: |
|
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|
5566 G1ParCleanupCTTask(CardTableModRefBS* ct_bs, |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
5567 G1CollectedHeap* g1h) : |
|
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|
5568 AbstractGangTask("G1 Par Cleanup CT Task"), |
|
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|
5569 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
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|
5570 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5571 void work(uint worker_id) { |
|
796
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|
5572 HeapRegion* r; |
|
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|
5573 while (r = _g1h->pop_dirty_cards_region()) { |
|
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|
5574 clear_cards(r); |
|
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|
5575 } |
|
940
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|
5576 } |
|
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|
5577 |
|
796
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|
5578 void clear_cards(HeapRegion* r) { |
|
3830
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|
5579 // 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
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|
5580 if (!r->is_survivor()) { |
|
796
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|
5581 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
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|
5582 } |
|
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|
5583 } |
|
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diff
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|
5584 }; |
|
29e7d79232b9
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diff
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|
5585 |
|
940
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|
5586 #ifndef PRODUCT |
|
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diff
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|
5587 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
063382f9b575
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3293
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changeset
|
5588 G1CollectedHeap* _g1h; |
|
940
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936
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|
5589 CardTableModRefBS* _ct_bs; |
|
8624da129f0b
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apetrusenko
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diff
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|
5590 public: |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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3293
diff
changeset
|
5591 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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|
5592 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
5593 virtual bool doHeapRegion(HeapRegion* r) { |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5594 if (r->is_survivor()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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3293
diff
changeset
|
5595 _g1h->verify_dirty_region(r); |
|
940
8624da129f0b
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diff
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|
5596 } else { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
5597 _g1h->verify_not_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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936
diff
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|
5598 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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936
diff
changeset
|
5599 return false; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5600 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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936
diff
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|
5601 }; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
5602 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
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|
5603 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
5604 // All of the region should be clean. |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
5605 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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changeset
|
5606 MemRegion mr(hr->bottom(), hr->end()); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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changeset
|
5607 ct_bs->verify_not_dirty_region(mr); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
5608 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
changeset
|
5609 |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
changeset
|
5610 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
5611 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
changeset
|
5612 // dirty allocated blocks as they allocate them. The thread that |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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changeset
|
5613 // retires each region and replaces it with a new one will do a |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
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|
5614 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
5615 // not dirty that area (one less thing to have to do while holding |
|
063382f9b575
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changeset
|
5616 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
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|
5617 // is dirty. |
|
063382f9b575
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diff
changeset
|
5618 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
|
063382f9b575
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changeset
|
5619 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
|
063382f9b575
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changeset
|
5620 ct_bs->verify_dirty_region(mr); |
|
063382f9b575
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|
5621 } |
|
063382f9b575
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|
5622 |
|
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|
5623 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
|
3317
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|
5624 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
|
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|
5625 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
|
3317
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changeset
|
5626 verify_dirty_region(hr); |
|
2433
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2432
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|
5627 } |
|
abdfc822206f
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2432
diff
changeset
|
5628 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
changeset
|
5629 |
|
abdfc822206f
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2432
diff
changeset
|
5630 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
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|
5631 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
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2432
diff
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|
5632 verify_dirty_young_list(_young_list->first_survivor_region()); |
|
abdfc822206f
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2432
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|
5633 } |
|
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|
5634 #endif |
|
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936
diff
changeset
|
5635 |
| 342 | 5636 void G1CollectedHeap::cleanUpCardTable() { |
| 5637 CardTableModRefBS* ct_bs = (CardTableModRefBS*) (barrier_set()); | |
| 5638 double start = os::elapsedTime(); | |
| 5639 | |
| 4023 | 5640 { |
| 5641 // Iterate over the dirty cards region list. | |
| 5642 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 5643 | |
| 4711 | 5644 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 5645 set_par_threads(); | |
| 4023 | 5646 workers()->run_task(&cleanup_task); |
| 5647 set_par_threads(0); | |
| 5648 } else { | |
| 5649 while (_dirty_cards_region_list) { | |
| 5650 HeapRegion* r = _dirty_cards_region_list; | |
| 5651 cleanup_task.clear_cards(r); | |
| 5652 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 5653 if (_dirty_cards_region_list == r) { | |
| 5654 // The last region. | |
| 5655 _dirty_cards_region_list = NULL; | |
| 5656 } | |
| 5657 r->set_next_dirty_cards_region(NULL); | |
|
796
29e7d79232b9
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|
5658 } |
|
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794
diff
changeset
|
5659 } |
| 4023 | 5660 #ifndef PRODUCT |
| 5661 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 5662 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 5663 heap_region_iterate(&cleanup_verifier); | |
| 5664 } | |
| 5665 #endif | |
|
940
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|
5666 } |
|
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5667 |
| 342 | 5668 double elapsed = os::elapsedTime() - start; |
|
3979
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|
5669 g1_policy()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 5670 } |
| 5671 | |
| 5672 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head) { | |
| 2152 | 5673 size_t pre_used = 0; |
| 5674 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 5675 | |
| 342 | 5676 double young_time_ms = 0.0; |
| 5677 double non_young_time_ms = 0.0; | |
| 5678 | |
|
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5679 // Since the collection set is a superset of the the young list, |
|
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|
5680 // all we need to do to clear the young list is clear its |
|
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5681 // head and length, and unlink any young regions in the code below |
|
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|
5682 _young_list->clear(); |
|
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|
5683 |
| 342 | 5684 G1CollectorPolicy* policy = g1_policy(); |
| 5685 | |
| 5686 double start_sec = os::elapsedTime(); | |
| 5687 bool non_young = true; | |
| 5688 | |
| 5689 HeapRegion* cur = cs_head; | |
| 5690 int age_bound = -1; | |
| 5691 size_t rs_lengths = 0; | |
| 5692 | |
| 5693 while (cur != NULL) { | |
| 2361 | 5694 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 5695 if (non_young) { |
| 5696 if (cur->is_young()) { | |
| 5697 double end_sec = os::elapsedTime(); | |
| 5698 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 5699 non_young_time_ms += elapsed_ms; | |
| 5700 | |
| 5701 start_sec = os::elapsedTime(); | |
| 5702 non_young = false; | |
| 5703 } | |
| 5704 } else { | |
|
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|
5705 if (!cur->is_young()) { |
|
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|
5706 double end_sec = os::elapsedTime(); |
|
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5707 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
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|
5708 young_time_ms += elapsed_ms; |
|
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|
5709 |
|
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|
5710 start_sec = os::elapsedTime(); |
|
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|
5711 non_young = true; |
|
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|
5712 } |
| 342 | 5713 } |
| 5714 | |
| 5715 rs_lengths += cur->rem_set()->occupied(); | |
| 5716 | |
| 5717 HeapRegion* next = cur->next_in_collection_set(); | |
| 5718 assert(cur->in_collection_set(), "bad CS"); | |
| 5719 cur->set_next_in_collection_set(NULL); | |
| 5720 cur->set_in_collection_set(false); | |
| 5721 | |
| 5722 if (cur->is_young()) { | |
| 5723 int index = cur->young_index_in_cset(); | |
|
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|
5724 assert(index != -1, "invariant"); |
|
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|
5725 assert((size_t) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 5726 size_t words_survived = _surviving_young_words[index]; |
| 5727 cur->record_surv_words_in_group(words_survived); | |
|
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5728 |
|
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|
5729 // At this point the we have 'popped' cur from the collection set |
|
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|
5730 // (linked via next_in_collection_set()) but it is still in the |
|
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|
5731 // young list (linked via next_young_region()). Clear the |
|
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|
5732 // _next_young_region field. |
|
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|
5733 cur->set_next_young_region(NULL); |
| 342 | 5734 } else { |
| 5735 int index = cur->young_index_in_cset(); | |
|
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|
5736 assert(index == -1, "invariant"); |
| 342 | 5737 } |
| 5738 | |
| 5739 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 5740 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 5741 "invariant" ); | |
| 5742 | |
| 5743 if (!cur->evacuation_failed()) { | |
|
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|
5744 MemRegion used_mr = cur->used_region(); |
|
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|
5745 |
| 342 | 5746 // And the region is empty. |
|
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|
5747 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
| 2152 | 5748 free_region(cur, &pre_used, &local_free_list, false /* par */); |
| 342 | 5749 } else { |
| 5750 cur->uninstall_surv_rate_group(); | |
|
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|
5751 if (cur->is_young()) { |
| 342 | 5752 cur->set_young_index_in_cset(-1); |
|
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|
5753 } |
| 342 | 5754 cur->set_not_young(); |
| 5755 cur->set_evacuation_failed(false); | |
| 4072 | 5756 // The region is now considered to be old. |
| 5757 _old_set.add(cur); | |
| 342 | 5758 } |
| 5759 cur = next; | |
| 5760 } | |
| 5761 | |
| 5762 policy->record_max_rs_lengths(rs_lengths); | |
| 5763 policy->cset_regions_freed(); | |
| 5764 | |
| 5765 double end_sec = os::elapsedTime(); | |
| 5766 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
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|
5767 |
|
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|
5768 if (non_young) { |
| 342 | 5769 non_young_time_ms += elapsed_ms; |
|
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|
5770 } else { |
| 342 | 5771 young_time_ms += elapsed_ms; |
|
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|
5772 } |
| 342 | 5773 |
| 2152 | 5774 update_sets_after_freeing_regions(pre_used, &local_free_list, |
| 4072 | 5775 NULL /* old_proxy_set */, |
| 2152 | 5776 NULL /* humongous_proxy_set */, |
| 5777 false /* par */); | |
| 342 | 5778 policy->record_young_free_cset_time_ms(young_time_ms); |
| 5779 policy->record_non_young_free_cset_time_ms(non_young_time_ms); | |
| 5780 } | |
| 5781 | |
|
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|
5782 // This routine is similar to the above but does not record |
|
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|
5783 // any policy statistics or update free lists; we are abandoning |
|
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|
5784 // the current incremental collection set in preparation of a |
|
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|
5785 // full collection. After the full GC we will start to build up |
|
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|
5786 // the incremental collection set again. |
|
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|
5787 // This is only called when we're doing a full collection |
|
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|
5788 // and is immediately followed by the tearing down of the young list. |
|
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|
5789 |
|
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|
5790 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
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|
5791 HeapRegion* cur = cs_head; |
|
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|
5792 |
|
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|
5793 while (cur != NULL) { |
|
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|
5794 HeapRegion* next = cur->next_in_collection_set(); |
|
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|
5795 assert(cur->in_collection_set(), "bad CS"); |
|
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|
5796 cur->set_next_in_collection_set(NULL); |
|
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|
5797 cur->set_in_collection_set(false); |
|
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|
5798 cur->set_young_index_in_cset(-1); |
|
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|
5799 cur = next; |
|
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|
5800 } |
|
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|
5801 } |
|
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|
5802 |
| 2152 | 5803 void G1CollectedHeap::set_free_regions_coming() { |
| 5804 if (G1ConcRegionFreeingVerbose) { | |
| 5805 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 5806 "setting free regions coming"); | |
| 5807 } | |
| 5808 | |
| 5809 assert(!free_regions_coming(), "pre-condition"); | |
| 5810 _free_regions_coming = true; | |
| 342 | 5811 } |
| 5812 | |
| 2152 | 5813 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
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|
5814 assert(free_regions_coming(), "pre-condition"); |
|
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|
5815 |
| 2152 | 5816 { |
| 5817 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 5818 _free_regions_coming = false; | |
| 5819 SecondaryFreeList_lock->notify_all(); | |
| 5820 } | |
| 5821 | |
| 5822 if (G1ConcRegionFreeingVerbose) { | |
| 5823 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 5824 "reset free regions coming"); | |
| 342 | 5825 } |
| 5826 } | |
| 5827 | |
| 2152 | 5828 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 5829 // Most of the time we won't have to wait, so let's do a quick test | |
| 5830 // first before we take the lock. | |
| 5831 if (!free_regions_coming()) { | |
| 5832 return; | |
| 5833 } | |
| 5834 | |
| 5835 if (G1ConcRegionFreeingVerbose) { | |
| 5836 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 5837 "waiting for free regions"); | |
| 342 | 5838 } |
| 5839 | |
| 5840 { | |
| 2152 | 5841 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 5842 while (free_regions_coming()) { | |
| 5843 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 5844 } |
| 2152 | 5845 } |
| 5846 | |
| 5847 if (G1ConcRegionFreeingVerbose) { | |
| 5848 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 5849 "done waiting for free regions"); | |
| 5850 } | |
| 342 | 5851 } |
| 5852 | |
| 5853 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 5854 assert(heap_lock_held_for_gc(), | |
| 5855 "the heap lock should already be held by or for this thread"); | |
| 5856 _young_list->push_region(hr); | |
| 5857 } | |
| 5858 | |
| 5859 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 5860 private: | |
| 5861 bool _success; | |
| 5862 public: | |
| 5863 NoYoungRegionsClosure() : _success(true) { } | |
| 5864 bool doHeapRegion(HeapRegion* r) { | |
| 5865 if (r->is_young()) { | |
| 5866 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 5867 r->bottom(), r->end()); | |
| 5868 _success = false; | |
| 5869 } | |
| 5870 return false; | |
| 5871 } | |
| 5872 bool success() { return _success; } | |
| 5873 }; | |
| 5874 | |
|
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|
5875 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
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|
5876 bool ret = _young_list->check_list_empty(check_sample); |
|
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|
5877 |
|
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|
5878 if (check_heap) { |
| 342 | 5879 NoYoungRegionsClosure closure; |
| 5880 heap_region_iterate(&closure); | |
| 5881 ret = ret && closure.success(); | |
| 5882 } | |
| 5883 | |
| 5884 return ret; | |
| 5885 } | |
| 5886 | |
| 4072 | 5887 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 5888 private: | |
| 5889 OldRegionSet *_old_set; | |
| 2152 | 5890 |
| 342 | 5891 public: |
| 4072 | 5892 TearDownRegionSetsClosure(OldRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 5893 |
| 342 | 5894 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 5895 if (r->is_empty()) { |
| 5896 // We ignore empty regions, we'll empty the free list afterwards | |
| 5897 } else if (r->is_young()) { | |
| 5898 // We ignore young regions, we'll empty the young list afterwards | |
| 5899 } else if (r->isHumongous()) { | |
| 5900 // We ignore humongous regions, we're not tearing down the | |
| 5901 // humongous region set | |
| 342 | 5902 } else { |
| 4072 | 5903 // The rest should be old |
| 5904 _old_set->remove(r); | |
| 342 | 5905 } |
| 5906 return false; | |
| 5907 } | |
| 5908 | |
| 4072 | 5909 ~TearDownRegionSetsClosure() { |
| 5910 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 5911 } |
| 342 | 5912 }; |
| 5913 | |
| 4072 | 5914 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 5915 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 5916 | |
| 5917 if (!free_list_only) { | |
| 5918 TearDownRegionSetsClosure cl(&_old_set); | |
| 5919 heap_region_iterate(&cl); | |
| 5920 | |
| 5921 // Need to do this after the heap iteration to be able to | |
| 5922 // recognize the young regions and ignore them during the iteration. | |
| 5923 _young_list->empty_list(); | |
| 5924 } | |
| 5925 _free_list.remove_all(); | |
| 5926 } | |
| 5927 | |
| 5928 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 5929 private: | |
| 5930 bool _free_list_only; | |
| 5931 OldRegionSet* _old_set; | |
| 5932 FreeRegionList* _free_list; | |
| 5933 size_t _total_used; | |
| 5934 | |
| 5935 public: | |
| 5936 RebuildRegionSetsClosure(bool free_list_only, | |
| 5937 OldRegionSet* old_set, FreeRegionList* free_list) : | |
| 5938 _free_list_only(free_list_only), | |
| 5939 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 5940 assert(_free_list->is_empty(), "pre-condition"); | |
| 5941 if (!free_list_only) { | |
| 5942 assert(_old_set->is_empty(), "pre-condition"); | |
| 5943 } | |
| 5944 } | |
| 5945 | |
| 5946 bool doHeapRegion(HeapRegion* r) { | |
| 5947 if (r->continuesHumongous()) { | |
| 5948 return false; | |
| 5949 } | |
| 5950 | |
| 5951 if (r->is_empty()) { | |
| 5952 // Add free regions to the free list | |
| 5953 _free_list->add_as_tail(r); | |
| 5954 } else if (!_free_list_only) { | |
| 5955 assert(!r->is_young(), "we should not come across young regions"); | |
| 5956 | |
| 5957 if (r->isHumongous()) { | |
| 5958 // We ignore humongous regions, we left the humongous set unchanged | |
| 5959 } else { | |
| 5960 // The rest should be old, add them to the old set | |
| 5961 _old_set->add(r); | |
| 5962 } | |
| 5963 _total_used += r->used(); | |
| 5964 } | |
| 5965 | |
| 5966 return false; | |
| 5967 } | |
| 5968 | |
| 5969 size_t total_used() { | |
| 5970 return _total_used; | |
| 5971 } | |
| 5972 }; | |
| 5973 | |
| 5974 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 5975 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 5976 | |
| 5977 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); | |
| 5978 heap_region_iterate(&cl); | |
| 5979 | |
| 5980 if (!free_list_only) { | |
| 5981 _summary_bytes_used = cl.total_used(); | |
| 5982 } | |
| 5983 assert(_summary_bytes_used == recalculate_used(), | |
| 5984 err_msg("inconsistent _summary_bytes_used, " | |
| 5985 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 5986 _summary_bytes_used, recalculate_used())); | |
| 342 | 5987 } |
| 5988 | |
| 5989 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 5990 _refine_cte_cl->set_concurrent(concurrent); | |
| 5991 } | |
| 5992 | |
| 5993 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 5994 HeapRegion* hr = heap_region_containing(p); | |
| 5995 if (hr == NULL) { | |
| 5996 return is_in_permanent(p); | |
| 5997 } else { | |
| 5998 return hr->is_in(p); | |
| 5999 } | |
| 6000 } | |
| 2152 | 6001 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6002 // Methods for the mutator alloc region |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6003 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6004 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6005 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6006 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6007 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6008 "if force is true we should be able to expand the young list"); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6009 bool young_list_full = g1_policy()->is_young_list_full(); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6010 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6011 HeapRegion* new_alloc_region = new_region(word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6012 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6013 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6014 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6015 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6016 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6017 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6018 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6019 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6020 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6021 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6022 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6023 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6024 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6025 assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6026 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6027 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6028 _summary_bytes_used += allocated_bytes; |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6029 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6030 // We update the eden sizes here, when the region is retired, |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6031 // instead of when it's allocated, since this is the point that its |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6032 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6033 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6034 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6035 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6036 HeapRegion* MutatorAllocRegion::allocate_new_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6037 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6038 return _g1h->new_mutator_alloc_region(word_size, force); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6039 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6040 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6041 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6042 // Don't change the number of workers. Use the value previously set |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6043 // in the workgroup. |
| 4711 | 6044 assert(G1CollectedHeap::use_parallel_gc_threads(), "shouldn't be here otherwise"); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6045 uint n_workers = workers()->active_workers(); |
| 4711 | 6046 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6047 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6048 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6049 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6050 assert(false, "Should have been set in prior evacuation pause."); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6051 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6052 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6053 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6054 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6055 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6056 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6057 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6058 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6059 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6060 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6061 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6062 // Methods for the GC alloc regions |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6063 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6064 HeapRegion* G1CollectedHeap::new_gc_alloc_region(size_t word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6065 size_t count, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6066 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6067 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6068 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6069 if (count < g1_policy()->max_regions(ap)) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6070 HeapRegion* new_alloc_region = new_region(word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6071 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6072 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6073 // We really only need to do this for old regions given that we |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6074 // should never scan survivors. But it doesn't hurt to do it |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6075 // for survivors too. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6076 new_alloc_region->set_saved_mark(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6077 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6078 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6079 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6080 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6081 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6082 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6083 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
|
6084 new_alloc_region->note_start_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6085 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6086 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6087 g1_policy()->note_alloc_region_limit_reached(ap); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6088 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6089 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6090 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6091 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6092 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6093 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6094 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6095 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6096 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
|
6097 alloc_region->note_end_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6098 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6099 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6100 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6101 } else { |
| 6102 _old_set.add(alloc_region); | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6103 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6104 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6105 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6106 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6107 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6108 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6109 assert(!force, "not supported for GC alloc regions"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6110 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6111 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6112 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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6113 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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6114 size_t allocated_bytes) { |
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6115 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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6116 GCAllocForSurvived); |
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6117 } |
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6118 |
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6119 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
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6120 bool force) { |
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6121 assert(!force, "not supported for GC alloc regions"); |
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6122 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
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6123 } |
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6124 |
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6125 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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6126 size_t allocated_bytes) { |
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6127 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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6128 GCAllocForTenured); |
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6129 } |
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6130 // Heap region set verification |
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6131 |
| 2152 | 6132 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6133 private: | |
| 4072 | 6134 FreeRegionList* _free_list; |
| 6135 OldRegionSet* _old_set; | |
| 2152 | 6136 HumongousRegionSet* _humongous_set; |
| 6137 size_t _region_count; | |
| 6138 | |
| 6139 public: | |
| 4072 | 6140 VerifyRegionListsClosure(OldRegionSet* old_set, |
| 6141 HumongousRegionSet* humongous_set, | |
| 2152 | 6142 FreeRegionList* free_list) : |
| 4072 | 6143 _old_set(old_set), _humongous_set(humongous_set), |
| 6144 _free_list(free_list), _region_count(0) { } | |
| 2152 | 6145 |
| 6146 size_t region_count() { return _region_count; } | |
| 6147 | |
| 6148 bool doHeapRegion(HeapRegion* hr) { | |
| 6149 _region_count += 1; | |
| 6150 | |
| 6151 if (hr->continuesHumongous()) { | |
| 6152 return false; | |
| 6153 } | |
| 6154 | |
| 6155 if (hr->is_young()) { | |
| 6156 // TODO | |
| 6157 } else if (hr->startsHumongous()) { | |
| 6158 _humongous_set->verify_next_region(hr); | |
| 6159 } else if (hr->is_empty()) { | |
| 6160 _free_list->verify_next_region(hr); | |
| 4072 | 6161 } else { |
| 6162 _old_set->verify_next_region(hr); | |
| 2152 | 6163 } |
| 6164 return false; | |
| 6165 } | |
| 6166 }; | |
| 6167 | |
| 3766 | 6168 HeapRegion* G1CollectedHeap::new_heap_region(size_t hrs_index, |
| 6169 HeapWord* bottom) { | |
| 6170 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6171 MemRegion mr(bottom, end); | |
| 6172 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6173 // This might return NULL if the allocation fails | |
| 6174 return new HeapRegion(hrs_index, _bot_shared, mr, true /* is_zeroed */); | |
| 6175 } | |
| 6176 | |
| 2152 | 6177 void G1CollectedHeap::verify_region_sets() { |
| 6178 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6179 | |
| 6180 // First, check the explicit lists. | |
| 6181 _free_list.verify(); | |
| 6182 { | |
| 6183 // Given that a concurrent operation might be adding regions to | |
| 6184 // the secondary free list we have to take the lock before | |
| 6185 // verifying it. | |
| 6186 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6187 _secondary_free_list.verify(); | |
| 6188 } | |
| 4072 | 6189 _old_set.verify(); |
| 2152 | 6190 _humongous_set.verify(); |
| 6191 | |
| 6192 // If a concurrent region freeing operation is in progress it will | |
| 6193 // be difficult to correctly attributed any free regions we come | |
| 6194 // across to the correct free list given that they might belong to | |
| 6195 // one of several (free_list, secondary_free_list, any local lists, | |
| 6196 // etc.). So, if that's the case we will skip the rest of the | |
| 6197 // verification operation. Alternatively, waiting for the concurrent | |
| 6198 // operation to complete will have a non-trivial effect on the GC's | |
| 6199 // operation (no concurrent operation will last longer than the | |
| 6200 // interval between two calls to verification) and it might hide | |
| 6201 // any issues that we would like to catch during testing. | |
| 6202 if (free_regions_coming()) { | |
| 6203 return; | |
| 6204 } | |
| 6205 | |
| 2361 | 6206 // Make sure we append the secondary_free_list on the free_list so |
| 6207 // that all free regions we will come across can be safely | |
| 6208 // attributed to the free_list. | |
| 6209 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6210 |
| 6211 // Finally, make sure that the region accounting in the lists is | |
| 6212 // consistent with what we see in the heap. | |
| 4072 | 6213 _old_set.verify_start(); |
| 2152 | 6214 _humongous_set.verify_start(); |
| 6215 _free_list.verify_start(); | |
| 6216 | |
| 4072 | 6217 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6218 heap_region_iterate(&cl); |
| 6219 | |
| 4072 | 6220 _old_set.verify_end(); |
| 2152 | 6221 _humongous_set.verify_end(); |
| 6222 _free_list.verify_end(); | |
| 342 | 6223 } |