Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 10098:71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
Summary: Move the calculation and recording of eden capacity to the start of a GC and print a detailed heap transition for full GCs.
Reviewed-by: tschatzl, jmasa
| author | johnc |
|---|---|
| date | Wed, 10 Apr 2013 10:57:34 -0700 |
| parents | 24ef5fb05e0f |
| children | c0000f77bc6d |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "code/icBuffer.hpp" | |
| 27 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
| 28 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
| 29 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
| 30 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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31 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
| 1972 | 32 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 33 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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34 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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35 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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36 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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37 #include "gc_implementation/g1/g1Log.hpp" |
| 1972 | 38 #include "gc_implementation/g1/g1MarkSweep.hpp" |
| 39 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
| 40 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
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41 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 42 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
| 43 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 44 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
| 45 #include "gc_implementation/shared/isGCActiveMark.hpp" | |
| 46 #include "memory/gcLocker.inline.hpp" | |
| 47 #include "memory/genOopClosures.inline.hpp" | |
| 48 #include "memory/generationSpec.hpp" | |
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49 #include "memory/referenceProcessor.hpp" |
| 1972 | 50 #include "oops/oop.inline.hpp" |
| 51 #include "oops/oop.pcgc.inline.hpp" | |
| 52 #include "runtime/aprofiler.hpp" | |
| 53 #include "runtime/vmThread.hpp" | |
| 342 | 54 |
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55 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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56 |
| 342 | 57 // turn it on so that the contents of the young list (scan-only / |
| 58 // to-be-collected) are printed at "strategic" points before / during | |
| 59 // / after the collection --- this is useful for debugging | |
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60 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 61 // CURRENT STATUS |
| 62 // This file is under construction. Search for "FIXME". | |
| 63 | |
| 64 // INVARIANTS/NOTES | |
| 65 // | |
| 66 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 67 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 68 // and allocate_new_tlab, which are the "entry" points to the | |
| 69 // allocation code from the rest of the JVM. (Note that this does not | |
| 70 // apply to TLAB allocation, which is not part of this interface: it | |
| 71 // is done by clients of this interface.) | |
| 342 | 72 |
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73 // Notes on implementation of parallelism in different tasks. |
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74 // |
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75 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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76 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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77 // It does use run_task() which sets _n_workers in the task. |
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78 // G1ParTask executes g1_process_strong_roots() -> |
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79 // SharedHeap::process_strong_roots() which calls eventuall to |
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80 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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81 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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82 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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83 // |
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84 |
| 342 | 85 // Local to this file. |
| 86 | |
| 87 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 88 SuspendibleThreadSet* _sts; | |
| 89 G1RemSet* _g1rs; | |
| 90 ConcurrentG1Refine* _cg1r; | |
| 91 bool _concurrent; | |
| 92 public: | |
| 93 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
| 94 G1RemSet* g1rs, | |
| 95 ConcurrentG1Refine* cg1r) : | |
| 96 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
| 97 {} | |
| 98 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 1705 | 99 bool oops_into_cset = _g1rs->concurrentRefineOneCard(card_ptr, worker_i, false); |
| 100 // This path is executed by the concurrent refine or mutator threads, | |
| 101 // concurrently, and so we do not care if card_ptr contains references | |
| 102 // that point into the collection set. | |
| 103 assert(!oops_into_cset, "should be"); | |
| 104 | |
| 342 | 105 if (_concurrent && _sts->should_yield()) { |
| 106 // Caller will actually yield. | |
| 107 return false; | |
| 108 } | |
| 109 // Otherwise, we finished successfully; return true. | |
| 110 return true; | |
| 111 } | |
| 112 void set_concurrent(bool b) { _concurrent = b; } | |
| 113 }; | |
| 114 | |
| 115 | |
| 116 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 117 int _calls; | |
| 118 G1CollectedHeap* _g1h; | |
| 119 CardTableModRefBS* _ctbs; | |
| 120 int _histo[256]; | |
| 121 public: | |
| 122 ClearLoggedCardTableEntryClosure() : | |
| 123 _calls(0) | |
| 124 { | |
| 125 _g1h = G1CollectedHeap::heap(); | |
| 126 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
| 127 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 128 } | |
| 129 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 130 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 131 _calls++; | |
| 132 unsigned char* ujb = (unsigned char*)card_ptr; | |
| 133 int ind = (int)(*ujb); | |
| 134 _histo[ind]++; | |
| 135 *card_ptr = -1; | |
| 136 } | |
| 137 return true; | |
| 138 } | |
| 139 int calls() { return _calls; } | |
| 140 void print_histo() { | |
| 141 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 142 for (int i = 0; i < 256; i++) { | |
| 143 if (_histo[i] != 0) { | |
| 144 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 145 } | |
| 146 } | |
| 147 } | |
| 148 }; | |
| 149 | |
| 150 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 151 int _calls; | |
| 152 G1CollectedHeap* _g1h; | |
| 153 CardTableModRefBS* _ctbs; | |
| 154 public: | |
| 155 RedirtyLoggedCardTableEntryClosure() : | |
| 156 _calls(0) | |
| 157 { | |
| 158 _g1h = G1CollectedHeap::heap(); | |
| 159 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
| 160 } | |
| 161 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 162 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 163 _calls++; | |
| 164 *card_ptr = 0; | |
| 165 } | |
| 166 return true; | |
| 167 } | |
| 168 int calls() { return _calls; } | |
| 169 }; | |
| 170 | |
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171 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
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172 public: |
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173 bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
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174 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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175 return true; |
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176 } |
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177 }; |
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178 |
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179 YoungList::YoungList(G1CollectedHeap* g1h) : |
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180 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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181 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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182 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 183 } |
| 184 | |
| 185 void YoungList::push_region(HeapRegion *hr) { | |
| 186 assert(!hr->is_young(), "should not already be young"); | |
| 187 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 188 | |
| 189 hr->set_next_young_region(_head); | |
| 190 _head = hr; | |
| 191 | |
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192 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 193 ++_length; |
| 194 } | |
| 195 | |
| 196 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 197 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 198 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 199 | |
| 200 hr->set_next_young_region(_survivor_head); | |
| 201 if (_survivor_head == NULL) { | |
| 545 | 202 _survivor_tail = hr; |
| 342 | 203 } |
| 204 _survivor_head = hr; | |
| 205 ++_survivor_length; | |
| 206 } | |
| 207 | |
| 208 void YoungList::empty_list(HeapRegion* list) { | |
| 209 while (list != NULL) { | |
| 210 HeapRegion* next = list->get_next_young_region(); | |
| 211 list->set_next_young_region(NULL); | |
| 212 list->uninstall_surv_rate_group(); | |
| 213 list->set_not_young(); | |
| 214 list = next; | |
| 215 } | |
| 216 } | |
| 217 | |
| 218 void YoungList::empty_list() { | |
| 219 assert(check_list_well_formed(), "young list should be well formed"); | |
| 220 | |
| 221 empty_list(_head); | |
| 222 _head = NULL; | |
| 223 _length = 0; | |
| 224 | |
| 225 empty_list(_survivor_head); | |
| 226 _survivor_head = NULL; | |
| 545 | 227 _survivor_tail = NULL; |
| 342 | 228 _survivor_length = 0; |
| 229 | |
| 230 _last_sampled_rs_lengths = 0; | |
| 231 | |
| 232 assert(check_list_empty(false), "just making sure..."); | |
| 233 } | |
| 234 | |
| 235 bool YoungList::check_list_well_formed() { | |
| 236 bool ret = true; | |
| 237 | |
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238 uint length = 0; |
| 342 | 239 HeapRegion* curr = _head; |
| 240 HeapRegion* last = NULL; | |
| 241 while (curr != NULL) { | |
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242 if (!curr->is_young()) { |
| 342 | 243 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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244 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 245 curr->bottom(), curr->end(), |
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246 curr->is_young(), curr->is_survivor()); |
| 342 | 247 ret = false; |
| 248 } | |
| 249 ++length; | |
| 250 last = curr; | |
| 251 curr = curr->get_next_young_region(); | |
| 252 } | |
| 253 ret = ret && (length == _length); | |
| 254 | |
| 255 if (!ret) { | |
| 256 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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257 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
| 342 | 258 length, _length); |
| 259 } | |
| 260 | |
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261 return ret; |
| 342 | 262 } |
| 263 | |
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264 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 265 bool ret = true; |
| 266 | |
| 267 if (_length != 0) { | |
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268 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
| 342 | 269 _length); |
| 270 ret = false; | |
| 271 } | |
| 272 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 273 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 274 ret = false; | |
| 275 } | |
| 276 if (_head != NULL) { | |
| 277 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 278 ret = false; | |
| 279 } | |
| 280 if (!ret) { | |
| 281 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 282 } | |
| 283 | |
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284 return ret; |
| 342 | 285 } |
| 286 | |
| 287 void | |
| 288 YoungList::rs_length_sampling_init() { | |
| 289 _sampled_rs_lengths = 0; | |
| 290 _curr = _head; | |
| 291 } | |
| 292 | |
| 293 bool | |
| 294 YoungList::rs_length_sampling_more() { | |
| 295 return _curr != NULL; | |
| 296 } | |
| 297 | |
| 298 void | |
| 299 YoungList::rs_length_sampling_next() { | |
| 300 assert( _curr != NULL, "invariant" ); | |
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301 size_t rs_length = _curr->rem_set()->occupied(); |
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302 |
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303 _sampled_rs_lengths += rs_length; |
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304 |
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305 // The current region may not yet have been added to the |
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306 // incremental collection set (it gets added when it is |
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307 // retired as the current allocation region). |
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308 if (_curr->in_collection_set()) { |
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309 // Update the collection set policy information for this region |
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310 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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311 } |
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312 |
| 342 | 313 _curr = _curr->get_next_young_region(); |
| 314 if (_curr == NULL) { | |
| 315 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 316 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 317 } | |
| 318 } | |
| 319 | |
| 320 void | |
| 321 YoungList::reset_auxilary_lists() { | |
| 322 guarantee( is_empty(), "young list should be empty" ); | |
| 323 assert(check_list_well_formed(), "young list should be well formed"); | |
| 324 | |
| 325 // Add survivor regions to SurvRateGroup. | |
| 326 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 327 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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328 |
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329 int young_index_in_cset = 0; |
| 342 | 330 for (HeapRegion* curr = _survivor_head; |
| 331 curr != NULL; | |
| 332 curr = curr->get_next_young_region()) { | |
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333 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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334 |
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335 // The region is a non-empty survivor so let's add it to |
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336 // the incremental collection set for the next evacuation |
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337 // pause. |
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338 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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339 young_index_in_cset += 1; |
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340 } |
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341 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
| 342 | 342 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 343 | |
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344 _head = _survivor_head; |
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345 _length = _survivor_length; |
| 342 | 346 if (_survivor_head != NULL) { |
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347 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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348 assert(_survivor_length > 0, "invariant"); |
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349 _survivor_tail->set_next_young_region(NULL); |
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350 } |
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351 |
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352 // Don't clear the survivor list handles until the start of |
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353 // the next evacuation pause - we need it in order to re-tag |
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354 // the survivor regions from this evacuation pause as 'young' |
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355 // at the start of the next. |
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356 |
| 545 | 357 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 358 |
| 359 assert(check_list_well_formed(), "young list should be well formed"); | |
| 360 } | |
| 361 | |
| 362 void YoungList::print() { | |
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363 HeapRegion* lists[] = {_head, _survivor_head}; |
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364 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 365 |
| 366 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 367 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 368 HeapRegion *curr = lists[list]; | |
| 369 if (curr == NULL) | |
| 370 gclog_or_tty->print_cr(" empty"); | |
| 371 while (curr != NULL) { | |
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372 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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373 HR_FORMAT_PARAMS(curr), |
| 342 | 374 curr->prev_top_at_mark_start(), |
| 375 curr->next_top_at_mark_start(), | |
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376 curr->age_in_surv_rate_group_cond()); |
| 342 | 377 curr = curr->get_next_young_region(); |
| 378 } | |
| 379 } | |
| 380 | |
| 381 gclog_or_tty->print_cr(""); | |
| 382 } | |
| 383 | |
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384 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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385 { |
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386 // Claim the right to put the region on the dirty cards region list |
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387 // by installing a self pointer. |
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388 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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389 if (next == NULL) { |
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390 HeapRegion* res = (HeapRegion*) |
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391 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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392 NULL); |
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393 if (res == NULL) { |
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394 HeapRegion* head; |
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395 do { |
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396 // Put the region to the dirty cards region list. |
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397 head = _dirty_cards_region_list; |
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398 next = (HeapRegion*) |
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399 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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400 if (next == head) { |
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401 assert(hr->get_next_dirty_cards_region() == hr, |
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402 "hr->get_next_dirty_cards_region() != hr"); |
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403 if (next == NULL) { |
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404 // The last region in the list points to itself. |
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405 hr->set_next_dirty_cards_region(hr); |
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406 } else { |
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407 hr->set_next_dirty_cards_region(next); |
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408 } |
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409 } |
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410 } while (next != head); |
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411 } |
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412 } |
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413 } |
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414 |
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415 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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416 { |
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417 HeapRegion* head; |
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418 HeapRegion* hr; |
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419 do { |
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420 head = _dirty_cards_region_list; |
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421 if (head == NULL) { |
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422 return NULL; |
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423 } |
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424 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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425 if (head == new_head) { |
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426 // The last region. |
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427 new_head = NULL; |
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428 } |
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429 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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430 head); |
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431 } while (hr != head); |
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432 assert(hr != NULL, "invariant"); |
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433 hr->set_next_dirty_cards_region(NULL); |
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434 return hr; |
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435 } |
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436 |
| 342 | 437 void G1CollectedHeap::stop_conc_gc_threads() { |
| 794 | 438 _cg1r->stop(); |
| 342 | 439 _cmThread->stop(); |
| 440 } | |
| 441 | |
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442 #ifdef ASSERT |
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443 // A region is added to the collection set as it is retired |
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444 // so an address p can point to a region which will be in the |
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445 // collection set but has not yet been retired. This method |
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446 // therefore is only accurate during a GC pause after all |
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447 // regions have been retired. It is used for debugging |
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448 // to check if an nmethod has references to objects that can |
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449 // be move during a partial collection. Though it can be |
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450 // inaccurate, it is sufficient for G1 because the conservative |
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451 // implementation of is_scavengable() for G1 will indicate that |
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452 // all nmethods must be scanned during a partial collection. |
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453 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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454 HeapRegion* hr = heap_region_containing(p); |
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455 return hr != NULL && hr->in_collection_set(); |
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456 } |
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457 #endif |
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458 |
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459 // Returns true if the reference points to an object that |
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460 // can move in an incremental collecction. |
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461 bool G1CollectedHeap::is_scavengable(const void* p) { |
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462 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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463 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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464 HeapRegion* hr = heap_region_containing(p); |
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465 if (hr == NULL) { |
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466 // null |
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467 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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468 return false; |
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469 } else { |
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470 return !hr->isHumongous(); |
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471 } |
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472 } |
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473 |
| 342 | 474 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 475 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 476 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); | |
| 477 | |
| 478 // Count the dirty cards at the start. | |
| 479 CountNonCleanMemRegionClosure count1(this); | |
| 480 ct_bs->mod_card_iterate(&count1); | |
| 481 int orig_count = count1.n(); | |
| 482 | |
| 483 // First clear the logged cards. | |
| 484 ClearLoggedCardTableEntryClosure clear; | |
| 485 dcqs.set_closure(&clear); | |
| 486 dcqs.apply_closure_to_all_completed_buffers(); | |
| 487 dcqs.iterate_closure_all_threads(false); | |
| 488 clear.print_histo(); | |
| 489 | |
| 490 // Now ensure that there's no dirty cards. | |
| 491 CountNonCleanMemRegionClosure count2(this); | |
| 492 ct_bs->mod_card_iterate(&count2); | |
| 493 if (count2.n() != 0) { | |
| 494 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 495 count2.n(), orig_count); | |
| 496 } | |
| 497 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 498 | |
| 499 RedirtyLoggedCardTableEntryClosure redirty; | |
| 500 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
| 501 dcqs.apply_closure_to_all_completed_buffers(); | |
| 502 dcqs.iterate_closure_all_threads(false); | |
| 503 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
| 504 clear.calls(), orig_count); | |
| 505 guarantee(redirty.calls() == clear.calls(), | |
| 506 "Or else mechanism is broken."); | |
| 507 | |
| 508 CountNonCleanMemRegionClosure count3(this); | |
| 509 ct_bs->mod_card_iterate(&count3); | |
| 510 if (count3.n() != orig_count) { | |
| 511 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 512 orig_count, count3.n()); | |
| 513 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 514 } | |
| 515 | |
| 516 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 517 } | |
| 518 | |
| 519 // Private class members. | |
| 520 | |
| 521 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 522 | |
| 523 // Private methods. | |
| 524 | |
| 2152 | 525 HeapRegion* |
| 2361 | 526 G1CollectedHeap::new_region_try_secondary_free_list() { |
| 2152 | 527 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 528 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 529 if (!_secondary_free_list.is_empty()) { | |
| 530 if (G1ConcRegionFreeingVerbose) { | |
| 531 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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532 "secondary_free_list has %u entries", |
| 2152 | 533 _secondary_free_list.length()); |
| 534 } | |
| 535 // It looks as if there are free regions available on the | |
| 536 // secondary_free_list. Let's move them to the free_list and try | |
| 537 // again to allocate from it. | |
| 538 append_secondary_free_list(); | |
| 539 | |
| 540 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
| 541 "empty we should have moved at least one entry to the free_list"); | |
| 542 HeapRegion* res = _free_list.remove_head(); | |
| 543 if (G1ConcRegionFreeingVerbose) { | |
| 544 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 545 "allocated "HR_FORMAT" from secondary_free_list", | |
| 546 HR_FORMAT_PARAMS(res)); | |
| 547 } | |
| 548 return res; | |
| 549 } | |
| 550 | |
| 551 // Wait here until we get notifed either when (a) there are no | |
| 552 // more free regions coming or (b) some regions have been moved on | |
| 553 // the secondary_free_list. | |
| 554 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 555 } | |
| 556 | |
| 557 if (G1ConcRegionFreeingVerbose) { | |
| 558 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 559 "could not allocate from secondary_free_list"); | |
| 560 } | |
| 561 return NULL; | |
| 562 } | |
| 563 | |
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564 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool do_expand) { |
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565 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 566 "the only time we use this to allocate a humongous region is " |
| 567 "when we are allocating a single humongous region"); | |
| 568 | |
| 569 HeapRegion* res; | |
| 570 if (G1StressConcRegionFreeing) { | |
| 571 if (!_secondary_free_list.is_empty()) { | |
| 572 if (G1ConcRegionFreeingVerbose) { | |
| 573 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 574 "forced to look at the secondary_free_list"); | |
| 575 } | |
| 2361 | 576 res = new_region_try_secondary_free_list(); |
| 2152 | 577 if (res != NULL) { |
| 578 return res; | |
| 579 } | |
| 580 } | |
| 581 } | |
| 582 res = _free_list.remove_head_or_null(); | |
| 583 if (res == NULL) { | |
| 584 if (G1ConcRegionFreeingVerbose) { | |
| 585 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 586 "res == NULL, trying the secondary_free_list"); | |
| 587 } | |
| 2361 | 588 res = new_region_try_secondary_free_list(); |
| 2152 | 589 } |
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590 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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591 // Currently, only attempts to allocate GC alloc regions set |
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592 // do_expand to true. So, we should only reach here during a |
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593 // safepoint. If this assumption changes we might have to |
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594 // reconsider the use of _expand_heap_after_alloc_failure. |
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595 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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596 |
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597 ergo_verbose1(ErgoHeapSizing, |
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598 "attempt heap expansion", |
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599 ergo_format_reason("region allocation request failed") |
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600 ergo_format_byte("allocation request"), |
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601 word_size * HeapWordSize); |
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602 if (expand(word_size * HeapWordSize)) { |
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603 // Given that expand() succeeded in expanding the heap, and we |
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604 // always expand the heap by an amount aligned to the heap |
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605 // region size, the free list should in theory not be empty. So |
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606 // it would probably be OK to use remove_head(). But the extra |
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607 // check for NULL is unlikely to be a performance issue here (we |
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608 // just expanded the heap!) so let's just be conservative and |
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609 // use remove_head_or_null(). |
| 3766 | 610 res = _free_list.remove_head_or_null(); |
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611 } else { |
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612 _expand_heap_after_alloc_failure = false; |
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613 } |
| 342 | 614 } |
| 615 return res; | |
| 616 } | |
| 617 | |
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618 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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619 size_t word_size) { |
| 2361 | 620 assert(isHumongous(word_size), "word_size should be humongous"); |
| 621 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 622 | |
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623 uint first = G1_NULL_HRS_INDEX; |
| 2152 | 624 if (num_regions == 1) { |
| 625 // Only one region to allocate, no need to go through the slower | |
| 626 // path. The caller will attempt the expasion if this fails, so | |
| 627 // let's not try to expand here too. | |
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628 HeapRegion* hr = new_region(word_size, false /* do_expand */); |
| 2152 | 629 if (hr != NULL) { |
| 630 first = hr->hrs_index(); | |
| 631 } else { | |
| 3766 | 632 first = G1_NULL_HRS_INDEX; |
| 2152 | 633 } |
| 634 } else { | |
| 635 // We can't allocate humongous regions while cleanupComplete() is | |
| 636 // running, since some of the regions we find to be empty might not | |
| 637 // yet be added to the free list and it is not straightforward to | |
| 638 // know which list they are on so that we can remove them. Note | |
| 639 // that we only need to do this if we need to allocate more than | |
| 640 // one region to satisfy the current humongous allocation | |
| 641 // request. If we are only allocating one region we use the common | |
| 642 // region allocation code (see above). | |
| 643 wait_while_free_regions_coming(); | |
| 2361 | 644 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 645 |
| 646 if (free_regions() >= num_regions) { | |
| 3766 | 647 first = _hrs.find_contiguous(num_regions); |
| 648 if (first != G1_NULL_HRS_INDEX) { | |
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649 for (uint i = first; i < first + num_regions; ++i) { |
| 3766 | 650 HeapRegion* hr = region_at(i); |
| 2152 | 651 assert(hr->is_empty(), "sanity"); |
| 2361 | 652 assert(is_on_master_free_list(hr), "sanity"); |
| 2152 | 653 hr->set_pending_removal(true); |
| 654 } | |
| 655 _free_list.remove_all_pending(num_regions); | |
| 656 } | |
| 657 } | |
| 658 } | |
| 659 return first; | |
| 660 } | |
| 661 | |
| 2361 | 662 HeapWord* |
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663 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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664 uint num_regions, |
| 2361 | 665 size_t word_size) { |
| 3766 | 666 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
| 2361 | 667 assert(isHumongous(word_size), "word_size should be humongous"); |
| 668 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 669 | |
| 670 // Index of last region in the series + 1. | |
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671 uint last = first + num_regions; |
| 2361 | 672 |
| 673 // We need to initialize the region(s) we just discovered. This is | |
| 674 // a bit tricky given that it can happen concurrently with | |
| 675 // refinement threads refining cards on these regions and | |
| 676 // potentially wanting to refine the BOT as they are scanning | |
| 677 // those cards (this can happen shortly after a cleanup; see CR | |
| 678 // 6991377). So we have to set up the region(s) carefully and in | |
| 679 // a specific order. | |
| 680 | |
| 681 // The word size sum of all the regions we will allocate. | |
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682 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 683 assert(word_size <= word_size_sum, "sanity"); |
| 684 | |
| 685 // This will be the "starts humongous" region. | |
| 3766 | 686 HeapRegion* first_hr = region_at(first); |
| 2361 | 687 // The header of the new object will be placed at the bottom of |
| 688 // the first region. | |
| 689 HeapWord* new_obj = first_hr->bottom(); | |
| 690 // This will be the new end of the first region in the series that | |
| 691 // should also match the end of the last region in the seriers. | |
| 692 HeapWord* new_end = new_obj + word_size_sum; | |
| 693 // This will be the new top of the first region that will reflect | |
| 694 // this allocation. | |
| 695 HeapWord* new_top = new_obj + word_size; | |
| 696 | |
| 697 // First, we need to zero the header of the space that we will be | |
| 698 // allocating. When we update top further down, some refinement | |
| 699 // threads might try to scan the region. By zeroing the header we | |
| 700 // ensure that any thread that will try to scan the region will | |
| 701 // come across the zero klass word and bail out. | |
| 702 // | |
| 703 // NOTE: It would not have been correct to have used | |
| 704 // CollectedHeap::fill_with_object() and make the space look like | |
| 705 // an int array. The thread that is doing the allocation will | |
| 706 // later update the object header to a potentially different array | |
| 707 // type and, for a very short period of time, the klass and length | |
| 708 // fields will be inconsistent. This could cause a refinement | |
| 709 // thread to calculate the object size incorrectly. | |
| 710 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 711 | |
| 712 // We will set up the first region as "starts humongous". This | |
| 713 // will also update the BOT covering all the regions to reflect | |
| 714 // that there is a single object that starts at the bottom of the | |
| 715 // first region. | |
| 716 first_hr->set_startsHumongous(new_top, new_end); | |
| 717 | |
| 718 // Then, if there are any, we will set up the "continues | |
| 719 // humongous" regions. | |
| 720 HeapRegion* hr = NULL; | |
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721 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 722 hr = region_at(i); |
| 2361 | 723 hr->set_continuesHumongous(first_hr); |
| 724 } | |
| 725 // If we have "continues humongous" regions (hr != NULL), then the | |
| 726 // end of the last one should match new_end. | |
| 727 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 728 | |
| 729 // Up to this point no concurrent thread would have been able to | |
| 730 // do any scanning on any region in this series. All the top | |
| 731 // fields still point to bottom, so the intersection between | |
| 732 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 733 // update the top fields, we'll do a storestore to make sure that | |
| 734 // no thread sees the update to top before the zeroing of the | |
| 735 // object header and the BOT initialization. | |
| 736 OrderAccess::storestore(); | |
| 737 | |
| 738 // Now that the BOT and the object header have been initialized, | |
| 739 // we can update top of the "starts humongous" region. | |
| 740 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 741 "new_top should be in this region"); | |
| 742 first_hr->set_top(new_top); | |
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743 if (_hr_printer.is_active()) { |
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744 HeapWord* bottom = first_hr->bottom(); |
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745 HeapWord* end = first_hr->orig_end(); |
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746 if ((first + 1) == last) { |
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747 // the series has a single humongous region |
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748 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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749 } else { |
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750 // the series has more than one humongous regions |
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751 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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752 } |
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753 } |
| 2361 | 754 |
| 755 // Now, we will update the top fields of the "continues humongous" | |
| 756 // regions. The reason we need to do this is that, otherwise, | |
| 757 // these regions would look empty and this will confuse parts of | |
| 758 // G1. For example, the code that looks for a consecutive number | |
| 759 // of empty regions will consider them empty and try to | |
| 760 // re-allocate them. We can extend is_empty() to also include | |
| 761 // !continuesHumongous(), but it is easier to just update the top | |
| 762 // fields here. The way we set top for all regions (i.e., top == | |
| 763 // end for all regions but the last one, top == new_top for the | |
| 764 // last one) is actually used when we will free up the humongous | |
| 765 // region in free_humongous_region(). | |
| 766 hr = NULL; | |
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767 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 768 hr = region_at(i); |
| 2361 | 769 if ((i + 1) == last) { |
| 770 // last continues humongous region | |
| 771 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 772 "new_top should fall on this region"); | |
| 773 hr->set_top(new_top); | |
|
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774 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 775 } else { |
| 776 // not last one | |
| 777 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 778 hr->set_top(hr->end()); | |
|
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779 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 780 } |
| 781 } | |
| 782 // If we have continues humongous regions (hr != NULL), then the | |
| 783 // end of the last one should match new_end and its top should | |
| 784 // match new_top. | |
| 785 assert(hr == NULL || | |
| 786 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
| 787 | |
| 788 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 789 _summary_bytes_used += first_hr->used(); | |
| 790 _humongous_set.add(first_hr); | |
| 791 | |
| 792 return new_obj; | |
| 793 } | |
| 794 | |
| 342 | 795 // If could fit into free regions w/o expansion, try. |
| 796 // Otherwise, if can expand, do so. | |
| 797 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 798 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 799 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 800 | |
| 801 verify_region_sets_optional(); | |
| 342 | 802 |
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803 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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804 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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805 uint x_num = expansion_regions(); |
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806 uint fs = _hrs.free_suffix(); |
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807 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
| 3766 | 808 if (first == G1_NULL_HRS_INDEX) { |
| 2152 | 809 // The only thing we can do now is attempt expansion. |
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810 if (fs + x_num >= num_regions) { |
|
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811 // If the number of regions we're trying to allocate for this |
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812 // object is at most the number of regions in the free suffix, |
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813 // then the call to humongous_obj_allocate_find_first() above |
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814 // should have succeeded and we wouldn't be here. |
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815 // |
|
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816 // We should only be trying to expand when the free suffix is |
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817 // not sufficient for the object _and_ we have some expansion |
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818 // room available. |
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819 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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820 |
|
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821 ergo_verbose1(ErgoHeapSizing, |
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822 "attempt heap expansion", |
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823 ergo_format_reason("humongous allocation request failed") |
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824 ergo_format_byte("allocation request"), |
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825 word_size * HeapWordSize); |
|
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826 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
| 3766 | 827 // Even though the heap was expanded, it might not have |
| 828 // reached the desired size. So, we cannot assume that the | |
| 829 // allocation will succeed. | |
|
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830 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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831 } |
| 2152 | 832 } |
| 833 } | |
| 834 | |
| 2361 | 835 HeapWord* result = NULL; |
| 3766 | 836 if (first != G1_NULL_HRS_INDEX) { |
| 2361 | 837 result = |
| 838 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
| 839 assert(result != NULL, "it should always return a valid result"); | |
|
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840 |
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841 // A successful humongous object allocation changes the used space |
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842 // information of the old generation so we need to recalculate the |
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843 // sizes and update the jstat counters here. |
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|
844 g1mm()->update_sizes(); |
| 2152 | 845 } |
| 846 | |
| 847 verify_region_sets_optional(); | |
| 2361 | 848 |
| 849 return result; | |
| 342 | 850 } |
| 851 | |
| 1973 | 852 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 853 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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854 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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855 |
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856 unsigned int dummy_gc_count_before; |
|
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857 int dummy_gclocker_retry_count = 0; |
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858 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
| 342 | 859 } |
| 860 | |
| 861 HeapWord* | |
| 862 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 863 bool* gc_overhead_limit_was_exceeded) { |
| 864 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 865 |
|
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866 // Loop until the allocation is satisified, or unsatisfied after GC. |
|
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867 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
| 1973 | 868 unsigned int gc_count_before; |
|
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|
869 |
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|
870 HeapWord* result = NULL; |
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871 if (!isHumongous(word_size)) { |
|
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872 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
|
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873 } else { |
|
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|
874 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
|
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|
875 } |
|
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876 if (result != NULL) { |
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|
877 return result; |
| 342 | 878 } |
| 879 | |
| 880 // Create the garbage collection operation... | |
| 1973 | 881 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 882 // ...and get the VM thread to execute it. |
| 883 VMThread::execute(&op); | |
| 1973 | 884 |
| 885 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 886 // If the operation was successful we'll return the result even | |
| 887 // if it is NULL. If the allocation attempt failed immediately | |
| 888 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 889 HeapWord* result = op.result(); | |
| 890 if (result != NULL && !isHumongous(word_size)) { | |
| 891 // Allocations that take place on VM operations do not do any | |
| 892 // card dirtying and we have to do it here. We only have to do | |
| 893 // this for non-humongous allocations, though. | |
| 894 dirty_young_block(result, word_size); | |
| 895 } | |
| 342 | 896 return result; |
| 1973 | 897 } else { |
|
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|
898 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
|
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|
899 return NULL; |
|
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|
900 } |
| 1973 | 901 assert(op.result() == NULL, |
| 902 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 903 } |
| 904 | |
| 905 // Give a warning if we seem to be looping forever. | |
| 906 if ((QueuedAllocationWarningCount > 0) && | |
| 907 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 908 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 909 } |
| 910 } | |
| 1973 | 911 |
| 912 ShouldNotReachHere(); | |
|
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|
913 return NULL; |
| 342 | 914 } |
| 915 | |
|
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|
916 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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|
917 unsigned int *gc_count_before_ret, |
|
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|
918 int* gclocker_retry_count_ret) { |
|
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|
919 // Make sure you read the note in attempt_allocation_humongous(). |
|
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|
920 |
|
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|
921 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
922 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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|
923 "be called for humongous allocation requests"); |
|
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|
924 |
|
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|
925 // We should only get here after the first-level allocation attempt |
|
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|
926 // (attempt_allocation()) failed to allocate. |
|
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|
927 |
|
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|
928 // We will loop until a) we manage to successfully perform the |
|
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|
929 // allocation or b) we successfully schedule a collection which |
|
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|
930 // fails to perform the allocation. b) is the only case when we'll |
|
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|
931 // return NULL. |
|
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|
932 HeapWord* result = NULL; |
|
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|
933 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
934 bool should_try_gc; |
|
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|
935 unsigned int gc_count_before; |
|
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|
936 |
|
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|
937 { |
|
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|
938 MutexLockerEx x(Heap_lock); |
|
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|
939 |
|
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|
940 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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|
941 false /* bot_updates */); |
|
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|
942 if (result != NULL) { |
|
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|
943 return result; |
|
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|
944 } |
|
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|
945 |
|
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|
946 // If we reach here, attempt_allocation_locked() above failed to |
|
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|
947 // allocate a new region. So the mutator alloc region should be NULL. |
|
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|
948 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
|
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|
949 |
|
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|
950 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
951 if (g1_policy()->can_expand_young_list()) { |
|
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|
952 // No need for an ergo verbose message here, |
|
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|
953 // can_expand_young_list() does this when it returns true. |
|
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954 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
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955 false /* bot_updates */); |
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956 if (result != NULL) { |
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957 return result; |
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958 } |
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959 } |
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960 should_try_gc = false; |
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961 } else { |
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962 // The GCLocker may not be active but the GCLocker initiated |
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963 // GC may not yet have been performed (GCLocker::needs_gc() |
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964 // returns true). In this case we do not try this GC and |
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965 // wait until the GCLocker initiated GC is performed, and |
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966 // then retry the allocation. |
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967 if (GC_locker::needs_gc()) { |
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968 should_try_gc = false; |
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969 } else { |
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970 // Read the GC count while still holding the Heap_lock. |
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971 gc_count_before = total_collections(); |
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972 should_try_gc = true; |
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973 } |
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974 } |
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975 } |
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976 |
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977 if (should_try_gc) { |
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978 bool succeeded; |
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979 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
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980 if (result != NULL) { |
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981 assert(succeeded, "only way to get back a non-NULL result"); |
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982 return result; |
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983 } |
|
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984 |
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985 if (succeeded) { |
|
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986 // If we get here we successfully scheduled a collection which |
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987 // failed to allocate. No point in trying to allocate |
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988 // further. We'll just return NULL. |
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989 MutexLockerEx x(Heap_lock); |
|
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990 *gc_count_before_ret = total_collections(); |
|
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991 return NULL; |
|
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992 } |
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993 } else { |
|
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994 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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995 MutexLockerEx x(Heap_lock); |
|
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996 *gc_count_before_ret = total_collections(); |
|
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997 return NULL; |
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998 } |
|
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999 // The GCLocker is either active or the GCLocker initiated |
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1000 // GC has not yet been performed. Stall until it is and |
|
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1001 // then retry the allocation. |
|
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1002 GC_locker::stall_until_clear(); |
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1003 (*gclocker_retry_count_ret) += 1; |
|
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1004 } |
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1005 |
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1006 // We can reach here if we were unsuccessul in scheduling a |
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1007 // collection (because another thread beat us to it) or if we were |
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1008 // stalled due to the GC locker. In either can we should retry the |
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1009 // allocation attempt in case another thread successfully |
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1010 // performed a collection and reclaimed enough space. We do the |
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1011 // first attempt (without holding the Heap_lock) here and the |
|
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1012 // follow-on attempt will be at the start of the next loop |
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1013 // iteration (after taking the Heap_lock). |
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1014 result = _mutator_alloc_region.attempt_allocation(word_size, |
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1015 false /* bot_updates */); |
|
5963
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1016 if (result != NULL) { |
|
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1017 return result; |
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1018 } |
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1019 |
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1020 // Give a warning if we seem to be looping forever. |
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1021 if ((QueuedAllocationWarningCount > 0) && |
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1022 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1023 warning("G1CollectedHeap::attempt_allocation_slow() " |
|
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1024 "retries %d times", try_count); |
|
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1025 } |
|
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|
1026 } |
|
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|
1027 |
|
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|
1028 ShouldNotReachHere(); |
|
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|
1029 return NULL; |
|
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|
1030 } |
|
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|
1031 |
|
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|
1032 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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1033 unsigned int * gc_count_before_ret, |
|
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1034 int* gclocker_retry_count_ret) { |
|
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|
1035 // The structure of this method has a lot of similarities to |
|
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|
1036 // attempt_allocation_slow(). The reason these two were not merged |
|
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1037 // into a single one is that such a method would require several "if |
|
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1038 // allocation is not humongous do this, otherwise do that" |
|
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|
1039 // conditional paths which would obscure its flow. In fact, an early |
|
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1040 // version of this code did use a unified method which was harder to |
|
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1041 // follow and, as a result, it had subtle bugs that were hard to |
|
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1042 // track down. So keeping these two methods separate allows each to |
|
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1043 // be more readable. It will be good to keep these two in sync as |
|
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|
1044 // much as possible. |
|
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|
1045 |
|
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|
1046 assert_heap_not_locked_and_not_at_safepoint(); |
|
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1047 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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1048 "should only be called for humongous allocations"); |
|
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|
1049 |
|
4834
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|
1050 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
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|
1051 // need to start a marking cycle at each humongous object allocation. We do |
|
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|
1052 // the check before we do the actual allocation. The reason for doing it |
|
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|
1053 // before the allocation is that we avoid having to keep track of the newly |
|
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|
1054 // allocated memory while we do a GC. |
|
4910
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|
1055 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
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|
1056 word_size)) { |
|
4834
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|
1057 collect(GCCause::_g1_humongous_allocation); |
|
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|
1058 } |
|
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|
1059 |
|
2433
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|
1060 // We will loop until a) we manage to successfully perform the |
|
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|
1061 // allocation or b) we successfully schedule a collection which |
|
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|
1062 // fails to perform the allocation. b) is the only case when we'll |
|
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|
1063 // return NULL. |
|
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|
1064 HeapWord* result = NULL; |
|
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|
1065 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
1066 bool should_try_gc; |
|
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|
1067 unsigned int gc_count_before; |
|
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|
1068 |
|
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|
1069 { |
|
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|
1070 MutexLockerEx x(Heap_lock); |
|
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1071 |
|
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1072 // Given that humongous objects are not allocated in young |
|
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1073 // regions, we'll first try to do the allocation without doing a |
|
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1074 // collection hoping that there's enough space in the heap. |
|
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1075 result = humongous_obj_allocate(word_size); |
|
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1076 if (result != NULL) { |
|
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1077 return result; |
|
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|
1078 } |
|
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1079 |
|
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1080 if (GC_locker::is_active_and_needs_gc()) { |
|
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1081 should_try_gc = false; |
|
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1082 } else { |
|
6106
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1083 // The GCLocker may not be active but the GCLocker initiated |
|
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1084 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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1085 // returns true). In this case we do not try this GC and |
|
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1086 // wait until the GCLocker initiated GC is performed, and |
|
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1087 // then retry the allocation. |
|
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1088 if (GC_locker::needs_gc()) { |
|
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1089 should_try_gc = false; |
|
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1090 } else { |
|
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1091 // Read the GC count while still holding the Heap_lock. |
|
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1092 gc_count_before = total_collections(); |
|
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1093 should_try_gc = true; |
|
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1094 } |
|
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1095 } |
|
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1096 } |
|
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1097 |
|
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1098 if (should_try_gc) { |
|
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1099 // If we failed to allocate the humongous object, we should try to |
|
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1100 // do a collection pause (if we're allowed) in case it reclaims |
|
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1101 // enough space for the allocation to succeed after the pause. |
|
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1102 |
|
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1103 bool succeeded; |
|
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1104 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
|
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1105 if (result != NULL) { |
|
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1106 assert(succeeded, "only way to get back a non-NULL result"); |
|
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1107 return result; |
|
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1108 } |
|
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1109 |
|
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1110 if (succeeded) { |
|
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1111 // If we get here we successfully scheduled a collection which |
|
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1112 // failed to allocate. No point in trying to allocate |
|
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1113 // further. We'll just return NULL. |
|
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1114 MutexLockerEx x(Heap_lock); |
|
4910
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1115 *gc_count_before_ret = total_collections(); |
|
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1116 return NULL; |
|
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1117 } |
|
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1118 } else { |
|
8853
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1119 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
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|
1120 MutexLockerEx x(Heap_lock); |
|
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1121 *gc_count_before_ret = total_collections(); |
|
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1122 return NULL; |
|
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1123 } |
|
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1124 // The GCLocker is either active or the GCLocker initiated |
|
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1125 // GC has not yet been performed. Stall until it is and |
|
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1126 // then retry the allocation. |
|
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1127 GC_locker::stall_until_clear(); |
|
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1128 (*gclocker_retry_count_ret) += 1; |
|
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1129 } |
|
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1130 |
|
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1131 // We can reach here if we were unsuccessul in scheduling a |
|
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1132 // collection (because another thread beat us to it) or if we were |
|
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1133 // stalled due to the GC locker. In either can we should retry the |
|
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1134 // allocation attempt in case another thread successfully |
|
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1135 // performed a collection and reclaimed enough space. Give a |
|
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1136 // warning if we seem to be looping forever. |
|
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1137 |
|
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1138 if ((QueuedAllocationWarningCount > 0) && |
|
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1139 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1140 warning("G1CollectedHeap::attempt_allocation_humongous() " |
|
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|
1141 "retries %d times", try_count); |
|
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|
1142 } |
|
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|
1143 } |
|
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|
1144 |
|
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|
1145 ShouldNotReachHere(); |
|
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|
1146 return NULL; |
|
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|
1147 } |
|
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|
1148 |
|
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|
1149 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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|
1150 bool expect_null_mutator_alloc_region) { |
| 2152 | 1151 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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|
1152 assert(_mutator_alloc_region.get() == NULL || |
|
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|
1153 !expect_null_mutator_alloc_region, |
|
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|
1154 "the current alloc region was unexpectedly found to be non-NULL"); |
|
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|
1155 |
|
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|
1156 if (!isHumongous(word_size)) { |
|
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|
1157 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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|
1158 false /* bot_updates */); |
|
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|
1159 } else { |
|
4829
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|
1160 HeapWord* result = humongous_obj_allocate(word_size); |
|
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|
1161 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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|
1162 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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|
1163 } |
|
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|
1164 return result; |
|
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|
1165 } |
|
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|
1166 |
|
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|
1167 ShouldNotReachHere(); |
| 342 | 1168 } |
| 1169 | |
| 1170 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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1171 G1CollectedHeap* _g1h; |
| 342 | 1172 ModRefBarrierSet* _mr_bs; |
| 1173 public: | |
|
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1174 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
|
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1175 _g1h(g1h), _mr_bs(mr_bs) { } |
| 342 | 1176 bool doHeapRegion(HeapRegion* r) { |
|
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1177 if (r->continuesHumongous()) { |
| 342 | 1178 return false; |
|
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1179 } |
|
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|
1180 _g1h->reset_gc_time_stamps(r); |
| 342 | 1181 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1182 if (hrrs != NULL) hrrs->clear(); | |
| 1183 // You might think here that we could clear just the cards | |
| 1184 // corresponding to the used region. But no: if we leave a dirty card | |
| 1185 // in a region we might allocate into, then it would prevent that card | |
| 1186 // from being enqueued, and cause it to be missed. | |
| 1187 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1188 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 1189 return false; | |
| 1190 } | |
| 1191 }; | |
| 1192 | |
|
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1193 void G1CollectedHeap::clear_rsets_post_compaction() { |
|
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1194 PostMCRemSetClearClosure rs_clear(this, mr_bs()); |
|
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1195 heap_region_iterate(&rs_clear); |
|
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1196 } |
| 342 | 1197 |
|
626
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|
1198 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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|
1199 G1CollectedHeap* _g1h; |
|
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|
1200 UpdateRSOopClosure _cl; |
|
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|
1201 int _worker_i; |
|
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|
1202 public: |
|
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|
1203 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1204 _cl(g1->g1_rem_set(), worker_i), |
|
626
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|
1205 _worker_i(worker_i), |
|
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|
1206 _g1h(g1) |
|
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|
1207 { } |
|
1960
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6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
johnc
parents:
1883
diff
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|
1208 |
|
626
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|
1209 bool doHeapRegion(HeapRegion* r) { |
|
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|
1210 if (!r->continuesHumongous()) { |
|
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|
1211 _cl.set_from(r); |
|
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|
1212 r->oop_iterate(&_cl); |
|
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|
1213 } |
|
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|
1214 return false; |
|
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diff
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|
1215 } |
|
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|
1216 }; |
|
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|
1217 |
|
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|
1218 class ParRebuildRSTask: public AbstractGangTask { |
|
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|
1219 G1CollectedHeap* _g1; |
|
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|
1220 public: |
|
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|
1221 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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1222 : AbstractGangTask("ParRebuildRSTask"), |
|
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1223 _g1(g1) |
|
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|
1224 { } |
|
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|
1225 |
|
4728
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7121618: Change type of number of GC workers to unsigned int.
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|
1226 void work(uint worker_id) { |
|
441e946dc1af
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1227 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
441e946dc1af
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|
1228 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
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|
1229 _g1->workers()->active_workers(), |
|
626
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|
1230 HeapRegion::RebuildRSClaimValue); |
|
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|
1231 } |
|
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|
1232 }; |
|
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|
1233 |
|
3778
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|
1234 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
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1235 private: |
|
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|
1236 G1HRPrinter* _hr_printer; |
|
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|
1237 public: |
|
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|
1238 bool doHeapRegion(HeapRegion* hr) { |
|
5f6f2615433a
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|
1239 assert(!hr->is_young(), "not expecting to find young regions"); |
|
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1240 // We only generate output for non-empty regions. |
|
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1241 if (!hr->is_empty()) { |
|
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1242 if (!hr->isHumongous()) { |
|
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1243 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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1244 } else if (hr->startsHumongous()) { |
|
6254
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1245 if (hr->region_num() == 1) { |
|
3778
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1246 // single humongous region |
|
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|
1247 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
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|
1248 } else { |
|
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|
1249 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
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|
1250 } |
|
5f6f2615433a
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|
1251 } else { |
|
5f6f2615433a
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|
1252 assert(hr->continuesHumongous(), "only way to get here"); |
|
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|
1253 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
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|
1254 } |
|
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|
1255 } |
|
5f6f2615433a
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|
1256 return false; |
|
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|
1257 } |
|
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|
1258 |
|
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|
1259 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
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1260 : _hr_printer(hr_printer) { } |
|
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|
1261 }; |
|
5f6f2615433a
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|
1262 |
|
6254
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|
1263 void G1CollectedHeap::print_hrs_post_compaction() { |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
1264 PostCompactionPrinterClosure cl(hr_printer()); |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
1265 heap_region_iterate(&cl); |
|
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|
1266 } |
|
a2f7274eb6ef
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parents:
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diff
changeset
|
1267 |
|
6628
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7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
1268 double G1CollectedHeap::verify(bool guard, const char* msg) { |
|
bb3f6194fedb
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|
1269 double verify_time_ms = 0.0; |
|
bb3f6194fedb
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|
1270 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
1271 if (guard && total_collections() >= VerifyGCStartAt) { |
|
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|
1272 double verify_start = os::elapsedTime(); |
|
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|
1273 HandleMark hm; // Discard invalid handles created during verification |
|
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|
1274 gclog_or_tty->print(msg); |
|
bb3f6194fedb
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|
1275 prepare_for_verify(); |
|
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|
1276 Universe::verify(false /* silent */, VerifyOption_G1UsePrevMarking); |
|
bb3f6194fedb
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|
1277 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
1278 } |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
1279 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
1280 return verify_time_ms; |
|
bb3f6194fedb
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|
1281 } |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
1282 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
1283 void G1CollectedHeap::verify_before_gc() { |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
1284 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); |
|
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|
1285 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
1286 } |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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changeset
|
1287 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
1288 void G1CollectedHeap::verify_after_gc() { |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
1289 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); |
|
bb3f6194fedb
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|
1290 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); |
|
bb3f6194fedb
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|
1291 } |
|
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|
1292 |
| 1973 | 1293 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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1611
diff
changeset
|
1294 bool clear_all_soft_refs, |
| 342 | 1295 size_t word_size) { |
| 2152 | 1296 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1297 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1298 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1299 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1300 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1301 |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1302 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1303 ResourceMark rm; |
| 1304 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
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4787
diff
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|
1305 print_heap_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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811
diff
changeset
|
1306 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
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changeset
|
1307 size_t metadata_prev_used = MetaspaceAux::used_in_bytes(); |
|
da91efe96a93
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|
1308 |
| 4072 | 1309 HRSPhaseSetter x(HRSPhaseFullGC); |
| 2152 | 1310 verify_region_sets_optional(); |
| 342 | 1311 |
|
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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changeset
|
1312 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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changeset
|
1313 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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|
1314 |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
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diff
changeset
|
1315 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
0bfd3fb24150
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|
1316 |
| 342 | 1317 { |
| 1318 IsGCActiveMark x; | |
| 1319 | |
| 1320 // Timing | |
| 6030 | 1321 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
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|
1322 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
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|
1323 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1324 |
| 342 | 1325 { |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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|
1326 TraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, gclog_or_tty); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1327 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1328 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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|
1329 |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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parents:
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diff
changeset
|
1330 double start = os::elapsedTime(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1331 g1_policy()->record_full_collection_start(); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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diff
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|
1332 |
|
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1333 // Note: When we have a more flexible GC logging framework that |
|
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1334 // allows us to add optional attributes to a GC log record we |
|
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1335 // could consider timing and reporting how long we wait in the |
|
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|
1336 // following two methods. |
|
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|
1337 wait_while_free_regions_coming(); |
|
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1338 // If we start the compaction before the CM threads finish |
|
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1339 // scanning the root regions we might trip them over as we'll |
|
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1340 // be moving objects / updating references. So let's wait until |
|
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1341 // they are done. By telling them to abort, they should complete |
|
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|
1342 // early. |
|
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|
1343 _cm->root_regions()->abort(); |
|
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|
1344 _cm->root_regions()->wait_until_scan_finished(); |
|
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1345 append_secondary_free_list_if_not_empty_with_lock(); |
|
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|
1346 |
|
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|
1347 gc_prologue(true); |
|
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|
1348 increment_total_collections(true /* full gc */); |
|
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|
1349 increment_old_marking_cycles_started(); |
|
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|
1350 |
|
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|
1351 assert(used() == recalculate_used(), "Should be equal"); |
|
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|
1352 |
|
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|
1353 verify_before_gc(); |
|
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|
1354 |
|
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|
1355 pre_full_gc_dump(); |
|
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|
1356 |
|
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|
1357 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
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|
1358 |
|
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|
1359 // Disable discovery and empty the discovered lists |
|
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|
1360 // for the CM ref processor. |
|
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|
1361 ref_processor_cm()->disable_discovery(); |
|
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1362 ref_processor_cm()->abandon_partial_discovery(); |
|
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1363 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1364 |
|
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|
1365 // Abandon current iterations of concurrent marking and concurrent |
|
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1366 // refinement, if any are in progress. We have to do this before |
|
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|
1367 // wait_until_scan_finished() below. |
|
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|
1368 concurrent_mark()->abort(); |
|
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|
1369 |
|
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|
1370 // Make sure we'll choose a new allocation region afterwards. |
|
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|
1371 release_mutator_alloc_region(); |
|
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|
1372 abandon_gc_alloc_regions(); |
|
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|
1373 g1_rem_set()->cleanupHRRS(); |
|
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|
1374 |
|
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|
1375 // We should call this after we retire any currently active alloc |
|
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1376 // regions so that all the ALLOC / RETIRE events are generated |
|
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|
1377 // before the start GC event. |
|
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|
1378 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
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|
1379 |
|
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|
1380 // We may have added regions to the current incremental collection |
|
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|
1381 // set between the last GC or pause and now. We need to clear the |
|
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|
1382 // incremental collection set and then start rebuilding it afresh |
|
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|
1383 // after this full GC. |
|
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|
1384 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
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|
1385 g1_policy()->clear_incremental_cset(); |
|
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|
1386 g1_policy()->stop_incremental_cset_building(); |
|
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|
1387 |
|
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|
1388 tear_down_region_sets(false /* free_list_only */); |
|
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|
1389 g1_policy()->set_gcs_are_young(true); |
|
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|
1390 |
|
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|
1391 // See the comments in g1CollectedHeap.hpp and |
|
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|
1392 // G1CollectedHeap::ref_processing_init() about |
|
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|
1393 // how reference processing currently works in G1. |
|
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|
1394 |
|
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|
1395 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
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|
1396 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
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|
1397 |
|
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|
1398 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
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|
1399 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
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|
1400 |
|
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|
1401 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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|
1402 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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|
1403 |
|
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|
1404 // Do collection work |
|
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|
1405 { |
|
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|
1406 HandleMark hm; // Discard invalid handles created during gc |
|
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|
1407 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
|
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|
1408 } |
|
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|
1409 |
|
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|
1410 assert(free_regions() == 0, "we should not have added any free regions"); |
|
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|
1411 rebuild_region_sets(false /* free_list_only */); |
|
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|
1412 |
|
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|
1413 // Enqueue any discovered reference objects that have |
|
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|
1414 // not been removed from the discovered lists. |
|
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|
1415 ref_processor_stw()->enqueue_discovered_references(); |
|
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|
1416 |
|
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|
1417 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
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|
1418 |
|
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|
1419 MemoryService::track_memory_usage(); |
|
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|
1420 |
|
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|
1421 verify_after_gc(); |
|
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|
1422 |
|
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|
1423 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
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|
1424 ref_processor_stw()->verify_no_references_recorded(); |
|
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|
1425 |
|
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|
1426 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
|
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|
1427 ClassLoaderDataGraph::purge(); |
|
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|
1428 |
|
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|
1429 // Note: since we've just done a full GC, concurrent |
|
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|
1430 // marking is no longer active. Therefore we need not |
|
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|
1431 // re-enable reference discovery for the CM ref processor. |
|
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|
1432 // That will be done at the start of the next marking cycle. |
|
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|
1433 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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|
1434 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1435 |
|
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|
1436 reset_gc_time_stamp(); |
|
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|
1437 // Since everything potentially moved, we will clear all remembered |
|
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|
1438 // sets, and clear all cards. Later we will rebuild remebered |
|
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|
1439 // sets. We will also reset the GC time stamps of the regions. |
|
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|
1440 clear_rsets_post_compaction(); |
|
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|
1441 check_gc_time_stamps(); |
|
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|
1442 |
|
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|
1443 // Resize the heap if necessary. |
|
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|
1444 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
|
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|
1445 |
|
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|
1446 if (_hr_printer.is_active()) { |
|
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|
1447 // We should do this after we potentially resize the heap so |
|
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|
1448 // that all the COMMIT / UNCOMMIT events are generated before |
|
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|
1449 // the end GC event. |
|
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|
1450 |
|
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|
1451 print_hrs_post_compaction(); |
|
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1452 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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|
1453 } |
|
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|
1454 |
|
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|
1455 if (_cg1r->use_cache()) { |
|
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|
1456 _cg1r->clear_and_record_card_counts(); |
|
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|
1457 _cg1r->clear_hot_cache(); |
|
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|
1458 } |
|
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|
1459 |
|
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|
1460 // Rebuild remembered sets of all regions. |
|
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|
1461 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
1462 uint n_workers = |
|
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|
1463 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1464 workers()->active_workers(), |
|
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|
1465 Threads::number_of_non_daemon_threads()); |
|
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|
1466 assert(UseDynamicNumberOfGCThreads || |
|
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|
1467 n_workers == workers()->total_workers(), |
|
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|
1468 "If not dynamic should be using all the workers"); |
|
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|
1469 workers()->set_active_workers(n_workers); |
|
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|
1470 // Set parallel threads in the heap (_n_par_threads) only |
|
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|
1471 // before a parallel phase and always reset it to 0 after |
|
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|
1472 // the phase so that the number of parallel threads does |
|
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|
1473 // no get carried forward to a serial phase where there |
|
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|
1474 // may be code that is "possibly_parallel". |
|
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|
1475 set_par_threads(n_workers); |
|
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|
1476 |
|
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|
1477 ParRebuildRSTask rebuild_rs_task(this); |
|
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|
1478 assert(check_heap_region_claim_values( |
|
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|
1479 HeapRegion::InitialClaimValue), "sanity check"); |
|
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|
1480 assert(UseDynamicNumberOfGCThreads || |
|
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|
1481 workers()->active_workers() == workers()->total_workers(), |
|
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|
1482 "Unless dynamic should use total workers"); |
|
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|
1483 // Use the most recent number of active workers |
|
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|
1484 assert(workers()->active_workers() > 0, |
|
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|
1485 "Active workers not properly set"); |
|
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|
1486 set_par_threads(workers()->active_workers()); |
|
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|
1487 workers()->run_task(&rebuild_rs_task); |
|
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|
1488 set_par_threads(0); |
|
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|
1489 assert(check_heap_region_claim_values( |
|
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|
1490 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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|
1491 reset_heap_region_claim_values(); |
|
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|
1492 } else { |
|
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|
1493 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1494 heap_region_iterate(&rebuild_rs); |
|
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|
1495 } |
|
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|
1496 |
|
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|
1497 if (true) { // FIXME |
|
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|
1498 MetaspaceGC::compute_new_size(); |
|
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|
1499 } |
| 342 | 1500 |
|
546
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diff
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|
1501 #ifdef TRACESPINNING |
|
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|
1502 ParallelTaskTerminator::print_termination_counts(); |
|
546
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diff
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|
1503 #endif |
|
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|
1504 |
|
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|
1505 // Discard all rset updates |
|
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|
1506 JavaThread::dirty_card_queue_set().abandon_logs(); |
|
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|
1507 assert(!G1DeferredRSUpdate |
|
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|
1508 || (G1DeferredRSUpdate && |
|
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|
1509 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
|
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|
1510 |
|
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|
1511 _young_list->reset_sampled_info(); |
|
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|
1512 // At this point there should be no regions in the |
|
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|
1513 // entire heap tagged as young. |
|
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|
1514 assert(check_young_list_empty(true /* check_heap */), |
|
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|
1515 "young list should be empty at this point"); |
|
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|
1516 |
|
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|
1517 // Update the number of full collections that have been completed. |
|
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|
1518 increment_old_marking_cycles_completed(false /* concurrent */); |
|
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|
1519 |
|
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|
1520 _hrs.verify_optional(); |
|
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|
1521 verify_region_sets_optional(); |
|
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|
1522 |
|
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|
1523 // Start a new incremental collection set for the next pause |
|
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|
1524 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
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|
1525 g1_policy()->start_incremental_cset_building(); |
|
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|
1526 |
|
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|
1527 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
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|
1528 // regions to the incremental collection set for the next |
|
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|
1529 // evacuation pause. |
|
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|
1530 clear_cset_fast_test(); |
|
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|
1531 |
|
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|
1532 init_mutator_alloc_region(); |
|
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|
1533 |
|
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|
1534 double end = os::elapsedTime(); |
|
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|
1535 g1_policy()->record_full_collection_end(); |
|
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|
1536 |
|
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|
1537 if (G1Log::fine()) { |
|
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|
1538 g1_policy()->print_heap_transition(); |
|
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|
1539 } |
|
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|
1540 |
|
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|
1541 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
|
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|
1542 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
|
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|
1543 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
|
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|
1544 // before any GC notifications are raised. |
|
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|
1545 g1mm()->update_sizes(); |
|
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|
1546 |
|
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|
1547 gc_epilogue(true); |
|
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|
1548 } |
|
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|
1549 |
|
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|
1550 if (G1Log::finer()) { |
|
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|
1551 g1_policy()->print_detailed_heap_transition(); |
|
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|
1552 } |
|
6121
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|
1553 |
|
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|
1554 print_heap_after_gc(); |
|
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|
1555 |
|
10098
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|
1556 post_full_gc_dump(); |
|
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|
1557 } |
| 1973 | 1558 |
| 1559 return true; | |
| 342 | 1560 } |
| 1561 | |
| 1562 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1563 // do_collection() will return whether it succeeded in performing |
| 1564 // the GC. Currently, there is no facility on the | |
| 1565 // do_full_collection() API to notify the caller than the collection | |
| 1566 // did not succeed (e.g., because it was locked out by the GC | |
| 1567 // locker). So, right now, we'll ignore the return value. | |
| 1568 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1569 clear_all_soft_refs, | |
| 1570 0 /* word_size */); | |
| 342 | 1571 } |
| 1572 | |
| 1573 // This code is mostly copied from TenuredGeneration. | |
| 1574 void | |
| 1575 G1CollectedHeap:: | |
| 1576 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1577 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, "sanity check"); | |
| 1578 | |
| 1579 // Include the current allocation, if any, and bytes that will be | |
| 1580 // pre-allocated to support collections, as "used". | |
| 1581 const size_t used_after_gc = used(); | |
| 1582 const size_t capacity_after_gc = capacity(); | |
| 1583 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1584 | |
|
1717
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|
1585 // This is enforced in arguments.cpp. |
|
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|
1586 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
|
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|
1587 "otherwise the code below doesn't make sense"); |
|
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|
1588 |
| 342 | 1589 // We don't have floating point command-line arguments |
|
1717
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|
1590 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1591 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
1717
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|
1592 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1593 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1594 | |
|
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1595 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1596 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1597 |
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1598 // We have to be careful here as these two calculations can overflow |
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1599 // 32-bit size_t's. |
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1600 double used_after_gc_d = (double) used_after_gc; |
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1601 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1602 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1603 |
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1604 // Let's make sure that they are both under the max heap size, which |
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1605 // by default will make them fit into a size_t. |
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1606 double desired_capacity_upper_bound = (double) max_heap_size; |
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1607 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1608 desired_capacity_upper_bound); |
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1609 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1610 desired_capacity_upper_bound); |
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1611 |
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1612 // We can now safely turn them into size_t's. |
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1613 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1614 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1615 |
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1616 // This assert only makes sense here, before we adjust them |
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1617 // with respect to the min and max heap size. |
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1618 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1619 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1620 "maximum_desired_capacity = "SIZE_FORMAT, |
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1621 minimum_desired_capacity, maximum_desired_capacity)); |
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1622 |
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1623 // Should not be greater than the heap max size. No need to adjust |
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1624 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1625 // we'll try to make the capacity larger than it, not smaller). |
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1626 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1627 // Should not be less than the heap min size. No need to adjust it |
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1628 // with respect to the heap max size as it's an upper bound (i.e., |
|
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1629 // we'll try to make the capacity smaller than it, not greater). |
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1630 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1631 |
|
1717
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1632 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1633 // Don't expand unless it's significant |
| 1634 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1635 ergo_verbose4(ErgoHeapSizing, |
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1636 "attempt heap expansion", |
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1637 ergo_format_reason("capacity lower than " |
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1638 "min desired capacity after Full GC") |
|
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1639 ergo_format_byte("capacity") |
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1640 ergo_format_byte("occupancy") |
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1641 ergo_format_byte_perc("min desired capacity"), |
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1642 capacity_after_gc, used_after_gc, |
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1643 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1644 expand(expand_bytes); |
| 342 | 1645 |
| 1646 // No expansion, now see if we want to shrink | |
|
1717
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1647 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1648 // Capacity too large, compute shrinking size |
| 1649 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1650 ergo_verbose4(ErgoHeapSizing, |
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1651 "attempt heap shrinking", |
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1652 ergo_format_reason("capacity higher than " |
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1653 "max desired capacity after Full GC") |
|
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1654 ergo_format_byte("capacity") |
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1655 ergo_format_byte("occupancy") |
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1656 ergo_format_byte_perc("max desired capacity"), |
|
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1657 capacity_after_gc, used_after_gc, |
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|
1658 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1659 shrink(shrink_bytes); |
| 1660 } | |
| 1661 } | |
| 1662 | |
| 1663 | |
| 1664 HeapWord* | |
| 1973 | 1665 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1666 bool* succeeded) { | |
| 2152 | 1667 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1668 |
| 1669 *succeeded = true; | |
| 1670 // Let's attempt the allocation first. | |
|
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1671 HeapWord* result = |
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1672 attempt_allocation_at_safepoint(word_size, |
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1673 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1674 if (result != NULL) { |
| 1675 assert(*succeeded, "sanity"); | |
| 1676 return result; | |
| 1677 } | |
| 342 | 1678 |
| 1679 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1680 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1681 // expansion over collection. (This might change in the future if we can | |
| 1682 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1683 result = expand_and_allocate(word_size); | |
| 1684 if (result != NULL) { | |
| 1973 | 1685 assert(*succeeded, "sanity"); |
| 342 | 1686 return result; |
| 1687 } | |
| 1688 | |
| 1973 | 1689 // Expansion didn't work, we'll try to do a Full GC. |
| 1690 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1691 false, /* clear_all_soft_refs */ | |
| 1692 word_size); | |
| 1693 if (!gc_succeeded) { | |
| 1694 *succeeded = false; | |
| 1695 return NULL; | |
| 1696 } | |
| 1697 | |
| 1698 // Retry the allocation | |
| 1699 result = attempt_allocation_at_safepoint(word_size, | |
|
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1700 true /* expect_null_mutator_alloc_region */); |
| 342 | 1701 if (result != NULL) { |
| 1973 | 1702 assert(*succeeded, "sanity"); |
| 342 | 1703 return result; |
| 1704 } | |
| 1705 | |
| 1973 | 1706 // Then, try a Full GC that will collect all soft references. |
| 1707 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1708 true, /* clear_all_soft_refs */ | |
| 1709 word_size); | |
| 1710 if (!gc_succeeded) { | |
| 1711 *succeeded = false; | |
| 1712 return NULL; | |
| 1713 } | |
| 1714 | |
| 1715 // Retry the allocation once more | |
| 1716 result = attempt_allocation_at_safepoint(word_size, | |
|
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1717 true /* expect_null_mutator_alloc_region */); |
| 342 | 1718 if (result != NULL) { |
| 1973 | 1719 assert(*succeeded, "sanity"); |
| 342 | 1720 return result; |
| 1721 } | |
| 1722 | |
|
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1723 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1724 "Flag should have been handled and cleared prior to this point"); |
|
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1725 |
| 342 | 1726 // What else? We might try synchronous finalization later. If the total |
| 1727 // space available is large enough for the allocation, then a more | |
| 1728 // complete compaction phase than we've tried so far might be | |
| 1729 // appropriate. | |
| 1973 | 1730 assert(*succeeded, "sanity"); |
| 342 | 1731 return NULL; |
| 1732 } | |
| 1733 | |
| 1734 // Attempting to expand the heap sufficiently | |
| 1735 // to support an allocation of the given "word_size". If | |
| 1736 // successful, perform the allocation and return the address of the | |
| 1737 // allocated block, or else "NULL". | |
| 1738 | |
| 1739 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1740 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1741 | |
| 1742 verify_region_sets_optional(); | |
| 1973 | 1743 |
|
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1744 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1745 ergo_verbose1(ErgoHeapSizing, |
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1746 "attempt heap expansion", |
|
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1747 ergo_format_reason("allocation request failed") |
|
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1748 ergo_format_byte("allocation request"), |
|
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1749 word_size * HeapWordSize); |
|
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1750 if (expand(expand_bytes)) { |
| 3766 | 1751 _hrs.verify_optional(); |
|
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1752 verify_region_sets_optional(); |
|
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1753 return attempt_allocation_at_safepoint(word_size, |
|
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1754 false /* expect_null_mutator_alloc_region */); |
|
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1755 } |
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1756 return NULL; |
| 342 | 1757 } |
| 1758 | |
| 3766 | 1759 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
| 1760 HeapWord* new_end) { | |
| 1761 assert(old_end != new_end, "don't call this otherwise"); | |
| 1762 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
| 1763 | |
| 1764 // Update the committed mem region. | |
| 1765 _g1_committed.set_end(new_end); | |
| 1766 // Tell the card table about the update. | |
| 1767 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
| 1768 // Tell the BOT about the update. | |
| 1769 _bot_shared->resize(_g1_committed.word_size()); | |
| 1770 } | |
| 1771 | |
|
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1772 bool G1CollectedHeap::expand(size_t expand_bytes) { |
| 342 | 1773 size_t old_mem_size = _g1_storage.committed_size(); |
|
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1774 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1775 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1776 HeapRegion::GrainBytes); | |
|
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1777 ergo_verbose2(ErgoHeapSizing, |
|
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1778 "expand the heap", |
|
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|
1779 ergo_format_byte("requested expansion amount") |
|
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|
1780 ergo_format_byte("attempted expansion amount"), |
|
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|
1781 expand_bytes, aligned_expand_bytes); |
|
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1782 |
| 3766 | 1783 // First commit the memory. |
| 1784 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
|
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1785 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1786 if (successful) { |
| 3766 | 1787 // Then propagate this update to the necessary data structures. |
| 1788 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
| 1789 update_committed_space(old_end, new_end); | |
| 1790 | |
| 1791 FreeRegionList expansion_list("Local Expansion List"); | |
| 1792 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
| 1793 assert(mr.start() == old_end, "post-condition"); | |
| 1794 // mr might be a smaller region than what was requested if | |
| 1795 // expand_by() was unable to allocate the HeapRegion instances | |
| 1796 assert(mr.end() <= new_end, "post-condition"); | |
| 1797 | |
| 1798 size_t actual_expand_bytes = mr.byte_size(); | |
| 1799 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
| 1800 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
| 1801 "post-condition"); | |
| 1802 if (actual_expand_bytes < aligned_expand_bytes) { | |
| 1803 // We could not expand _hrs to the desired size. In this case we | |
| 1804 // need to shrink the committed space accordingly. | |
| 1805 assert(mr.end() < new_end, "invariant"); | |
| 1806 | |
| 1807 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
| 1808 // First uncommit the memory. | |
| 1809 _g1_storage.shrink_by(diff_bytes); | |
| 1810 // Then propagate this update to the necessary data structures. | |
| 1811 update_committed_space(new_end, mr.end()); | |
|
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1812 } |
| 3766 | 1813 _free_list.add_as_tail(&expansion_list); |
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1814 |
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1815 if (_hr_printer.is_active()) { |
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1816 HeapWord* curr = mr.start(); |
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1817 while (curr < mr.end()) { |
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1818 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1819 _hr_printer.commit(curr, curr_end); |
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1820 curr = curr_end; |
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1821 } |
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1822 assert(curr == mr.end(), "post-condition"); |
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1823 } |
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1824 g1_policy()->record_new_heap_size(n_regions()); |
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1825 } else { |
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1826 ergo_verbose0(ErgoHeapSizing, |
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1827 "did not expand the heap", |
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1828 ergo_format_reason("heap expansion operation failed")); |
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1829 // The expansion of the virtual storage space was unsuccessful. |
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1830 // Let's see if it was because we ran out of swap. |
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1831 if (G1ExitOnExpansionFailure && |
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1832 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1833 // We had head room... |
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1834 vm_exit_out_of_memory(aligned_expand_bytes, "G1 heap expansion"); |
| 342 | 1835 } |
| 1836 } | |
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1837 return successful; |
| 342 | 1838 } |
| 1839 | |
| 3766 | 1840 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1841 size_t old_mem_size = _g1_storage.committed_size(); |
| 1842 size_t aligned_shrink_bytes = | |
| 1843 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1844 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1845 HeapRegion::GrainBytes); | |
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1846 uint num_regions_deleted = 0; |
| 3766 | 1847 MemRegion mr = _hrs.shrink_by(aligned_shrink_bytes, &num_regions_deleted); |
| 1848 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
| 1849 assert(mr.end() == old_end, "post-condition"); | |
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1850 |
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1851 ergo_verbose3(ErgoHeapSizing, |
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1852 "shrink the heap", |
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1853 ergo_format_byte("requested shrinking amount") |
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1854 ergo_format_byte("aligned shrinking amount") |
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1855 ergo_format_byte("attempted shrinking amount"), |
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1856 shrink_bytes, aligned_shrink_bytes, mr.byte_size()); |
| 3766 | 1857 if (mr.byte_size() > 0) { |
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1858 if (_hr_printer.is_active()) { |
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1859 HeapWord* curr = mr.end(); |
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1860 while (curr > mr.start()) { |
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1861 HeapWord* curr_end = curr; |
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1862 curr -= HeapRegion::GrainWords; |
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1863 _hr_printer.uncommit(curr, curr_end); |
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1864 } |
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1865 assert(curr == mr.start(), "post-condition"); |
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1866 } |
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1867 |
| 342 | 1868 _g1_storage.shrink_by(mr.byte_size()); |
| 3766 | 1869 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
| 1870 assert(mr.start() == new_end, "post-condition"); | |
| 1871 | |
| 1872 _expansion_regions += num_regions_deleted; | |
| 1873 update_committed_space(old_end, new_end); | |
| 1874 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1875 g1_policy()->record_new_heap_size(n_regions()); |
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1876 } else { |
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1877 ergo_verbose0(ErgoHeapSizing, |
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1878 "did not shrink the heap", |
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1879 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1880 } |
| 1881 } | |
| 1882 | |
| 1883 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1884 verify_region_sets_optional(); |
| 1885 | |
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1886 // We should only reach here at the end of a Full GC which means we |
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1887 // should not not be holding to any GC alloc regions. The method |
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1888 // below will make sure of that and do any remaining clean up. |
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1889 abandon_gc_alloc_regions(); |
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1890 |
| 2152 | 1891 // Instead of tearing down / rebuilding the free lists here, we |
| 1892 // could instead use the remove_all_pending() method on free_list to | |
| 1893 // remove only the ones that we need to remove. | |
| 4072 | 1894 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1895 shrink_helper(shrink_bytes); |
| 4072 | 1896 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1897 |
| 3766 | 1898 _hrs.verify_optional(); |
| 2152 | 1899 verify_region_sets_optional(); |
| 342 | 1900 } |
| 1901 | |
| 1902 // Public methods. | |
| 1903 | |
| 1904 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1905 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1906 #endif // _MSC_VER | |
| 1907 | |
| 1908 | |
| 1909 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1910 SharedHeap(policy_), | |
| 1911 _g1_policy(policy_), | |
| 1111 | 1912 _dirty_card_queue_set(false), |
| 1705 | 1913 _into_cset_dirty_card_queue_set(false), |
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1914 _is_alive_closure_cm(this), |
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1915 _is_alive_closure_stw(this), |
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1916 _ref_processor_cm(NULL), |
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1917 _ref_processor_stw(NULL), |
| 342 | 1918 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1919 _bot_shared(NULL), | |
| 1920 _evac_failure_scan_stack(NULL) , | |
| 1921 _mark_in_progress(false), | |
| 2152 | 1922 _cg1r(NULL), _summary_bytes_used(0), |
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1923 _g1mm(NULL), |
| 342 | 1924 _refine_cte_cl(NULL), |
| 1925 _full_collection(false), | |
| 2152 | 1926 _free_list("Master Free List"), |
| 1927 _secondary_free_list("Secondary Free List"), | |
| 4072 | 1928 _old_set("Old Set"), |
| 2152 | 1929 _humongous_set("Master Humongous Set"), |
| 1930 _free_regions_coming(false), | |
| 342 | 1931 _young_list(new YoungList(this)), |
| 1932 _gc_time_stamp(0), | |
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1933 _retained_old_gc_alloc_region(NULL), |
| 6595 | 1934 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1935 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1936 _expand_heap_after_alloc_failure(true), |
| 526 | 1937 _surviving_young_words(NULL), |
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1938 _old_marking_cycles_started(0), |
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1939 _old_marking_cycles_completed(0), |
| 526 | 1940 _in_cset_fast_test(NULL), |
|
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1941 _in_cset_fast_test_base(NULL), |
|
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1942 _dirty_cards_region_list(NULL), |
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1943 _worker_cset_start_region(NULL), |
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1944 _worker_cset_start_region_time_stamp(NULL) { |
| 342 | 1945 _g1h = this; // To catch bugs. |
| 1946 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { | |
| 1947 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1948 } | |
|
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1949 |
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1950 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1951 |
| 342 | 1952 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1953 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1954 | |
| 1955 int n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); | |
| 1956 assert(n_rem_sets > 0, "Invariant."); | |
| 1957 | |
| 1958 HeapRegionRemSetIterator** iter_arr = | |
| 6197 | 1959 NEW_C_HEAP_ARRAY(HeapRegionRemSetIterator*, n_queues, mtGC); |
| 342 | 1960 for (int i = 0; i < n_queues; i++) { |
| 1961 iter_arr[i] = new HeapRegionRemSetIterator(); | |
| 1962 } | |
| 1963 _rem_set_iterator = iter_arr; | |
| 1964 | |
| 6197 | 1965 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1966 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
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1967 |
| 342 | 1968 for (int i = 0; i < n_queues; i++) { |
| 1969 RefToScanQueue* q = new RefToScanQueue(); | |
| 1970 q->initialize(); | |
| 1971 _task_queues->register_queue(i, q); | |
| 1972 } | |
| 1973 | |
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1974 clear_cset_start_regions(); |
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1975 |
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1976 // Initialize the G1EvacuationFailureALot counters and flags. |
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1977 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1978 |
| 342 | 1979 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1980 } | |
| 1981 | |
| 1982 jint G1CollectedHeap::initialize() { | |
| 1166 | 1983 CollectedHeap::pre_initialize(); |
| 342 | 1984 os::enable_vtime(); |
| 1985 | |
|
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1986 G1Log::init(); |
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1987 |
| 342 | 1988 // Necessary to satisfy locking discipline assertions. |
| 1989 | |
| 1990 MutexLocker x(Heap_lock); | |
| 1991 | |
|
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1992 // We have to initialize the printer before committing the heap, as |
|
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1993 // it will be used then. |
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1994 _hr_printer.set_active(G1PrintHeapRegions); |
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1995 |
| 342 | 1996 // While there are no constraints in the GC code that HeapWordSize |
| 1997 // be any particular value, there are multiple other areas in the | |
| 1998 // system which believe this to be true (e.g. oop->object_size in some | |
| 1999 // cases incorrectly returns the size in wordSize units rather than | |
| 2000 // HeapWordSize). | |
| 2001 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 2002 | |
| 2003 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 2004 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
| 2005 | |
| 2006 // Ensure that the sizes are properly aligned. | |
| 2007 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 2008 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 2009 | |
| 2010 _cg1r = new ConcurrentG1Refine(); | |
| 2011 | |
| 2012 // Reserve the maximum. | |
|
642
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|
2013 |
|
3824
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|
2014 // When compressed oops are enabled, the preferred heap base |
|
6aa4feb8a366
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|
2015 // is calculated by subtracting the requested size from the |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
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|
2016 // 32Gb boundary and using the result as the base address for |
|
6aa4feb8a366
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|
2017 // heap reservation. If the requested size is not aligned to |
|
6aa4feb8a366
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|
2018 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
|
6aa4feb8a366
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|
2019 // into the ReservedHeapSpace constructor) then the actual |
|
6aa4feb8a366
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|
2020 // base of the reserved heap may end up differing from the |
|
6aa4feb8a366
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|
2021 // address that was requested (i.e. the preferred heap base). |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
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|
2022 // If this happens then we could end up using a non-optimal |
|
6aa4feb8a366
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|
2023 // compressed oops mode. |
|
6aa4feb8a366
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|
2024 |
|
6aa4feb8a366
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|
2025 // Since max_byte_size is aligned to the size of a heap region (checked |
|
6725
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|
2026 // above). |
|
da91efe96a93
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|
2027 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); |
|
da91efe96a93
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|
2028 |
|
da91efe96a93
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|
2029 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
|
da91efe96a93
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|
2030 HeapRegion::GrainBytes); |
| 342 | 2031 |
| 2032 // It is important to do this in a way such that concurrent readers can't | |
| 2033 // temporarily think somethings in the heap. (I've actually seen this | |
| 2034 // happen in asserts: DLD.) | |
| 2035 _reserved.set_word_size(0); | |
| 2036 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 2037 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 2038 | |
|
6010
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|
2039 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
| 342 | 2040 |
| 2041 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 2042 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 2043 set_barrier_set(rem_set()->bs()); | |
| 2044 if (barrier_set()->is_a(BarrierSet::ModRef)) { | |
| 2045 _mr_bs = (ModRefBarrierSet*)_barrier_set; | |
| 2046 } else { | |
| 2047 vm_exit_during_initialization("G1 requires a mod ref bs."); | |
| 2048 return JNI_ENOMEM; | |
| 2049 } | |
| 2050 | |
| 2051 // Also create a G1 rem set. | |
| 1861 | 2052 if (mr_bs()->is_a(BarrierSet::CardTableModRef)) { |
| 2053 _g1_rem_set = new G1RemSet(this, (CardTableModRefBS*)mr_bs()); | |
| 342 | 2054 } else { |
| 1861 | 2055 vm_exit_during_initialization("G1 requires a cardtable mod ref bs."); |
| 2056 return JNI_ENOMEM; | |
| 342 | 2057 } |
| 2058 | |
| 2059 // Carve out the G1 part of the heap. | |
| 2060 | |
| 2061 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
| 2062 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
| 2063 g1_rs.size()/HeapWordSize); | |
| 2064 | |
| 2065 _g1_storage.initialize(g1_rs, 0); | |
| 2066 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
| 3766 | 2067 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
| 2068 (HeapWord*) _g1_reserved.end(), | |
| 2069 _expansion_regions); | |
| 342 | 2070 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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796
diff
changeset
|
2071 // 6843694 - ensure that the maximum region index can fit |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
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796
diff
changeset
|
2072 // in the remembered set structures. |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2073 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2074 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2075 |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2076 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
|
2077 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
|
2078 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2079 "too many cards per region"); |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2080 |
| 2152 | 2081 HeapRegionSet::set_unrealistically_long_length(max_regions() + 1); |
| 2082 | |
| 342 | 2083 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
| 2084 heap_word_size(init_byte_size)); | |
| 2085 | |
| 2086 _g1h = this; | |
| 2087 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
2088 _in_cset_fast_test_length = max_regions(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
2089 _in_cset_fast_test_base = |
| 6197 | 2090 NEW_C_HEAP_ARRAY(bool, (size_t) _in_cset_fast_test_length, mtGC); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2091 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2092 // 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
|
2093 // 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
|
2094 // 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
|
2095 _in_cset_fast_test = _in_cset_fast_test_base - |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2096 ((uintx) _g1_reserved.start() >> HeapRegion::LogOfHRGrainBytes); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2097 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2098 // 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
|
2099 // 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
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|
2100 // evacuation pause. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2101 clear_cset_fast_test(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2102 |
| 342 | 2103 // Create the ConcurrentMark data structure and thread. |
| 2104 // (Must do this late, so that "max_regions" is defined.) | |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2105 _cm = new ConcurrentMark(this, heap_rs); |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2106 if (_cm == NULL || !_cm->completed_initialization()) { |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2107 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2108 return JNI_ENOMEM; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2109 } |
| 342 | 2110 _cmThread = _cm->cmThread(); |
| 2111 | |
| 2112 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2113 HeapRegionRemSet::init_heap(max_regions()); | |
| 2114 | |
| 677 | 2115 // Now expand into the initial heap size. |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2116 if (!expand(init_byte_size)) { |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2117 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2118 return JNI_ENOMEM; |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2119 } |
| 342 | 2120 |
| 2121 // Perform any initialization actions delegated to the policy. | |
| 2122 g1_policy()->init(); | |
| 2123 | |
| 2124 _refine_cte_cl = | |
| 2125 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
| 2126 g1_rem_set(), | |
| 2127 concurrent_g1_refine()); | |
| 2128 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 2129 | |
| 2130 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2131 SATB_Q_FL_lock, | |
| 1111 | 2132 G1SATBProcessCompletedThreshold, |
| 342 | 2133 Shared_SATB_Q_lock); |
| 794 | 2134 |
| 2135 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
| 2136 DirtyCardQ_FL_lock, | |
| 1111 | 2137 concurrent_g1_refine()->yellow_zone(), |
| 2138 concurrent_g1_refine()->red_zone(), | |
| 794 | 2139 Shared_DirtyCardQ_lock); |
| 2140 | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2141 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2142 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2143 DirtyCardQ_FL_lock, |
| 1111 | 2144 -1, // never trigger processing |
| 2145 -1, // no limit on length | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2146 Shared_DirtyCardQ_lock, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2147 &JavaThread::dirty_card_queue_set()); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2148 } |
| 1705 | 2149 |
| 2150 // Initialize the card queue set used to hold cards containing | |
| 2151 // references into the collection set. | |
| 2152 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
| 2153 DirtyCardQ_FL_lock, | |
| 2154 -1, // never trigger processing | |
| 2155 -1, // no limit on length | |
| 2156 Shared_DirtyCardQ_lock, | |
| 2157 &JavaThread::dirty_card_queue_set()); | |
| 2158 | |
| 342 | 2159 // In case we're keeping closure specialization stats, initialize those |
| 2160 // counts and that mechanism. | |
| 2161 SpecializationStats::clear(); | |
| 2162 | |
| 2163 // Do later initialization work for concurrent refinement. | |
| 2164 _cg1r->init(); | |
| 2165 | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2166 // 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
|
2167 // 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
|
2168 // space here, lots of asserts fire. |
| 3766 | 2169 |
| 2170 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
| 2171 _g1_reserved.start()); | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2172 // 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
|
2173 // 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
|
2174 // 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
|
2175 // 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
|
2176 dummy_region->set_young(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2177 // Make sure it's full. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2178 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2179 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2180 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2181 init_mutator_alloc_region(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2182 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2183 // 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
|
2184 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2185 _g1mm = new G1MonitoringSupport(this); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2186 |
| 342 | 2187 return JNI_OK; |
| 2188 } | |
| 2189 | |
| 2190 void G1CollectedHeap::ref_processing_init() { | |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2191 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2192 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2193 // * There are two reference processor instances. One is |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2194 // used to record and process discovered references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2195 // during concurrent marking; the other is used to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2196 // record and process references during STW pauses |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2197 // (both full and incremental). |
|
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2198 // * Both ref processors need to 'span' the entire heap as |
|
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2199 // the regions in the collection set may be dotted around. |
|
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2200 // |
|
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2201 // * For the concurrent marking ref processor: |
|
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2202 // * Reference discovery is enabled at initial marking. |
|
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2203 // * Reference discovery is disabled and the discovered |
|
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2204 // references processed etc during remarking. |
|
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2205 // * Reference discovery is MT (see below). |
|
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2206 // * Reference discovery requires a barrier (see below). |
|
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2207 // * Reference processing may or may not be MT |
|
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2208 // (depending on the value of ParallelRefProcEnabled |
|
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|
2209 // and ParallelGCThreads). |
|
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2210 // * A full GC disables reference discovery by the CM |
|
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2211 // ref processor and abandons any entries on it's |
|
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2212 // discovered lists. |
|
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2213 // |
|
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2214 // * For the STW processor: |
|
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2215 // * Non MT discovery is enabled at the start of a full GC. |
|
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2216 // * Processing and enqueueing during a full GC is non-MT. |
|
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2217 // * During a full GC, references are processed after marking. |
|
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2218 // |
|
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2219 // * Discovery (may or may not be MT) is enabled at the start |
|
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2220 // of an incremental evacuation pause. |
|
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2221 // * References are processed near the end of a STW evacuation pause. |
|
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2222 // * For both types of GC: |
|
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2223 // * Discovery is atomic - i.e. not concurrent. |
|
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2224 // * Reference discovery will not need a barrier. |
|
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|
2225 |
| 342 | 2226 SharedHeap::ref_processing_init(); |
| 2227 MemRegion mr = reserved_region(); | |
|
3979
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2228 |
|
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2229 // Concurrent Mark ref processor |
|
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|
2230 _ref_processor_cm = |
|
2369
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|
2231 new ReferenceProcessor(mr, // span |
|
3979
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2232 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
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|
2233 // mt processing |
|
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|
2234 (int) ParallelGCThreads, |
|
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|
2235 // degree of mt processing |
|
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|
2236 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
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|
2237 // mt discovery |
|
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|
2238 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
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|
2239 // degree of mt discovery |
|
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|
2240 false, |
|
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|
2241 // Reference discovery is not atomic |
|
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|
2242 &_is_alive_closure_cm, |
|
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2243 // is alive closure |
|
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|
2244 // (for efficiency/performance) |
|
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|
2245 true); |
|
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|
2246 // Setting next fields of discovered |
|
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|
2247 // lists requires a barrier. |
|
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|
2248 |
|
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|
2249 // STW ref processor |
|
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|
2250 _ref_processor_stw = |
|
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|
2251 new ReferenceProcessor(mr, // span |
|
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|
2252 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
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|
2253 // mt processing |
|
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|
2254 MAX2((int)ParallelGCThreads, 1), |
|
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|
2255 // degree of mt processing |
|
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|
2256 (ParallelGCThreads > 1), |
|
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|
2257 // mt discovery |
|
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|
2258 MAX2((int)ParallelGCThreads, 1), |
|
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|
2259 // degree of mt discovery |
|
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|
2260 true, |
|
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|
2261 // Reference discovery is atomic |
|
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|
2262 &_is_alive_closure_stw, |
|
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|
2263 // is alive closure |
|
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|
2264 // (for efficiency/performance) |
|
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|
2265 false); |
|
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|
2266 // Setting next fields of discovered |
|
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|
2267 // lists requires a barrier. |
| 342 | 2268 } |
| 2269 | |
| 2270 size_t G1CollectedHeap::capacity() const { | |
| 2271 return _g1_committed.byte_size(); | |
| 2272 } | |
| 2273 | |
|
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2274 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
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2275 assert(!hr->continuesHumongous(), "pre-condition"); |
|
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2276 hr->reset_gc_time_stamp(); |
|
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2277 if (hr->startsHumongous()) { |
|
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|
2278 uint first_index = hr->hrs_index() + 1; |
|
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|
2279 uint last_index = hr->last_hc_index(); |
|
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2280 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2281 HeapRegion* chr = region_at(i); |
|
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|
2282 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2283 chr->reset_gc_time_stamp(); |
|
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2284 } |
|
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2285 } |
|
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2286 } |
|
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2287 |
|
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|
2288 #ifndef PRODUCT |
|
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2289 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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2290 private: |
|
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|
2291 unsigned _gc_time_stamp; |
|
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|
2292 bool _failures; |
|
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2293 |
|
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2294 public: |
|
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|
2295 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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2296 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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2297 |
|
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|
2298 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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2299 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
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2300 if (_gc_time_stamp != region_gc_time_stamp) { |
|
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2301 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
|
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2302 "expected %d", HR_FORMAT_PARAMS(hr), |
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2303 region_gc_time_stamp, _gc_time_stamp); |
|
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2304 _failures = true; |
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2305 } |
|
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|
2306 return false; |
|
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2307 } |
|
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2308 |
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|
2309 bool failures() { return _failures; } |
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|
2310 }; |
|
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2311 |
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2312 void G1CollectedHeap::check_gc_time_stamps() { |
|
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2313 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
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2314 heap_region_iterate(&cl); |
|
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|
2315 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
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2316 } |
|
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2317 #endif // PRODUCT |
|
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2318 |
| 1705 | 2319 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2320 DirtyCardQueue* into_cset_dcq, | |
| 2321 bool concurrent, | |
| 342 | 2322 int worker_i) { |
| 889 | 2323 // Clean cards in the hot card cache |
| 1705 | 2324 concurrent_g1_refine()->clean_up_cache(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2325 |
| 342 | 2326 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2327 int n_completed_buffers = 0; | |
| 1705 | 2328 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2329 n_completed_buffers++; |
| 2330 } | |
|
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|
2331 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
| 342 | 2332 dcqs.clear_n_completed_buffers(); |
| 2333 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2334 } | |
| 2335 | |
| 2336 | |
| 2337 // Computes the sum of the storage used by the various regions. | |
| 2338 | |
| 2339 size_t G1CollectedHeap::used() const { | |
|
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|
2340 assert(Heap_lock->owner() != NULL, |
|
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|
2341 "Should be owned on this thread's behalf."); |
| 342 | 2342 size_t result = _summary_bytes_used; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2343 // 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
|
2344 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2345 if (hr != NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2346 result += hr->used(); |
| 342 | 2347 return result; |
| 2348 } | |
| 2349 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2350 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
|
2351 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
|
2352 return result; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2353 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2354 |
| 342 | 2355 class SumUsedClosure: public HeapRegionClosure { |
| 2356 size_t _used; | |
| 2357 public: | |
| 2358 SumUsedClosure() : _used(0) {} | |
| 2359 bool doHeapRegion(HeapRegion* r) { | |
| 2360 if (!r->continuesHumongous()) { | |
| 2361 _used += r->used(); | |
| 2362 } | |
| 2363 return false; | |
| 2364 } | |
| 2365 size_t result() { return _used; } | |
| 2366 }; | |
| 2367 | |
| 2368 size_t G1CollectedHeap::recalculate_used() const { | |
| 2369 SumUsedClosure blk; | |
| 3766 | 2370 heap_region_iterate(&blk); |
| 342 | 2371 return blk.result(); |
| 2372 } | |
| 2373 | |
| 2374 size_t G1CollectedHeap::unsafe_max_alloc() { | |
| 2152 | 2375 if (free_regions() > 0) return HeapRegion::GrainBytes; |
| 342 | 2376 // otherwise, is there space in the current allocation region? |
| 2377 | |
| 2378 // We need to store the current allocation region in a local variable | |
| 2379 // here. The problem is that this method doesn't take any locks and | |
| 2380 // there may be other threads which overwrite the current allocation | |
| 2381 // region field. attempt_allocation(), for example, sets it to NULL | |
| 2382 // and this can happen *after* the NULL check here but before the call | |
| 2383 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
| 2384 // to be a problem in the optimized build, since the two loads of the | |
| 2385 // current allocation region field are optimized away. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2386 HeapRegion* hr = _mutator_alloc_region.get(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2387 if (hr == NULL) { |
| 342 | 2388 return 0; |
| 2389 } | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2390 return hr->free(); |
| 342 | 2391 } |
| 2392 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2393 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
|
2394 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2395 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
|
2396 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
|
2397 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
|
2398 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2399 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2400 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2401 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2402 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2403 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2404 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2405 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2406 // 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
|
2407 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2408 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2409 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2410 // 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
|
2411 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2412 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2413 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2414 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2415 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2416 // 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
|
2417 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2418 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2419 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2420 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2421 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2422 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2423 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2424 void G1CollectedHeap::increment_old_marking_cycles_started() { |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2425 assert(_old_marking_cycles_started == _old_marking_cycles_completed || |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2426 _old_marking_cycles_started == _old_marking_cycles_completed + 1, |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2427 err_msg("Wrong marking cycle count (started: %d, completed: %d)", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2428 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2429 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2430 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2431 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2432 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2433 void G1CollectedHeap::increment_old_marking_cycles_completed(bool concurrent) { |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2434 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2435 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2436 // 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
|
2437 // 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
|
2438 // 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
|
2439 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2440 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2441 // 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
|
2442 // 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
|
2443 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2444 // 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
|
2445 // nesting) or two (when a Full GC interrupted a concurrent cycle) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2446 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2447 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2448 // This is the case for the inner caller, i.e. a Full GC. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2449 assert(concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2450 (_old_marking_cycles_started == _old_marking_cycles_completed + 1) || |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2451 (_old_marking_cycles_started == _old_marking_cycles_completed + 2), |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2452 err_msg("for inner caller (Full GC): _old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2453 "is inconsistent with _old_marking_cycles_completed = %u", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2454 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2455 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2456 // This is the case for the outer caller, i.e. the concurrent cycle. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2457 assert(!concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2458 (_old_marking_cycles_started == _old_marking_cycles_completed + 1), |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2459 err_msg("for outer caller (concurrent cycle): " |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2460 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2461 "is inconsistent with _old_marking_cycles_completed = %u", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2462 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2463 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2464 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2465 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2466 // We need to clear the "in_progress" flag in the CM thread before |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2467 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2468 // is set) so that if a waiter requests another System.gc() it doesn't |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2469 // incorrectly see that a marking cyle is still in progress. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2470 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2471 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2472 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2473 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2474 // This notify_all() will ensure that a thread that called |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2475 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2476 // and it's waiting for a full GC to finish will be woken up. It is |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2477 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2478 FullGCCount_lock->notify_all(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2479 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2480 |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2481 void G1CollectedHeap::collect(GCCause::Cause cause) { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2482 assert_heap_not_locked(); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2483 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2484 unsigned int gc_count_before; |
|
6120
37552638d24a
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2485 unsigned int old_marking_count_before; |
|
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2486 bool retry_gc; |
|
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|
2487 |
|
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|
2488 do { |
|
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|
2489 retry_gc = false; |
|
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2490 |
|
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|
2491 { |
|
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|
2492 MutexLocker ml(Heap_lock); |
|
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|
2493 |
|
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|
2494 // Read the GC count while holding the Heap_lock |
|
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2495 gc_count_before = total_collections(); |
|
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2496 old_marking_count_before = _old_marking_cycles_started; |
|
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2497 } |
|
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|
2498 |
|
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|
2499 if (should_do_concurrent_full_gc(cause)) { |
|
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|
2500 // Schedule an initial-mark evacuation pause that will start a |
|
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2501 // concurrent cycle. We're setting word_size to 0 which means that |
|
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|
2502 // we are not requesting a post-GC allocation. |
|
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|
2503 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2504 0, /* word_size */ |
|
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2505 true, /* should_initiate_conc_mark */ |
|
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|
2506 g1_policy()->max_pause_time_ms(), |
|
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|
2507 cause); |
|
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2508 |
|
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|
2509 VMThread::execute(&op); |
|
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2510 if (!op.pause_succeeded()) { |
|
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2511 if (old_marking_count_before == _old_marking_cycles_started) { |
|
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2512 retry_gc = op.should_retry_gc(); |
|
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2513 } else { |
|
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2514 // A Full GC happened while we were trying to schedule the |
|
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2515 // initial-mark GC. No point in starting a new cycle given |
|
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2516 // that the whole heap was collected anyway. |
|
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2517 } |
|
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2518 |
|
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2519 if (retry_gc) { |
|
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2520 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
2521 GC_locker::stall_until_clear(); |
|
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|
2522 } |
|
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|
2523 } |
|
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|
2524 } |
|
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|
2525 } else { |
|
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|
2526 if (cause == GCCause::_gc_locker |
|
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|
2527 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
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|
2528 |
|
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|
2529 // Schedule a standard evacuation pause. We're setting word_size |
|
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|
2530 // to 0 which means that we are not requesting a post-GC allocation. |
|
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|
2531 VM_G1IncCollectionPause op(gc_count_before, |
|
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|
2532 0, /* word_size */ |
|
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|
2533 false, /* should_initiate_conc_mark */ |
|
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|
2534 g1_policy()->max_pause_time_ms(), |
|
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|
2535 cause); |
|
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|
2536 VMThread::execute(&op); |
|
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|
2537 } else { |
|
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|
2538 // Schedule a Full GC. |
|
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2539 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
|
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2540 VMThread::execute(&op); |
|
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|
2541 } |
|
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|
2542 } |
|
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|
2543 } while (retry_gc); |
| 342 | 2544 } |
| 2545 | |
| 2546 bool G1CollectedHeap::is_in(const void* p) const { | |
| 4708 | 2547 if (_g1_committed.contains(p)) { |
| 2548 // Given that we know that p is in the committed space, | |
| 2549 // heap_region_containing_raw() should successfully | |
| 2550 // return the containing region. | |
| 2551 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2552 return hr->is_in(p); |
| 2553 } else { | |
|
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|
2554 return false; |
| 342 | 2555 } |
| 2556 } | |
| 2557 | |
| 2558 // Iteration functions. | |
| 2559 | |
| 2560 // Iterates an OopClosure over all ref-containing fields of objects | |
| 2561 // within a HeapRegion. | |
| 2562 | |
| 2563 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
| 2564 MemRegion _mr; | |
|
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|
2565 ExtendedOopClosure* _cl; |
| 342 | 2566 public: |
|
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|
2567 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
| 342 | 2568 : _mr(mr), _cl(cl) {} |
| 2569 bool doHeapRegion(HeapRegion* r) { | |
|
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|
2570 if (!r->continuesHumongous()) { |
| 342 | 2571 r->oop_iterate(_cl); |
| 2572 } | |
| 2573 return false; | |
| 2574 } | |
| 2575 }; | |
| 2576 | |
|
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|
2577 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
| 342 | 2578 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
| 3766 | 2579 heap_region_iterate(&blk); |
|
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2580 } |
|
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|
2581 |
|
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|
2582 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
| 342 | 2583 IterateOopClosureRegionClosure blk(mr, cl); |
| 3766 | 2584 heap_region_iterate(&blk); |
| 342 | 2585 } |
| 2586 | |
| 2587 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2588 | |
| 2589 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2590 ObjectClosure* _cl; | |
| 2591 public: | |
| 2592 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2593 bool doHeapRegion(HeapRegion* r) { | |
| 2594 if (! r->continuesHumongous()) { | |
| 2595 r->object_iterate(_cl); | |
| 2596 } | |
| 2597 return false; | |
| 2598 } | |
| 2599 }; | |
| 2600 | |
|
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|
2601 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
| 342 | 2602 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2603 heap_region_iterate(&blk); |
| 342 | 2604 } |
| 2605 | |
| 2606 void G1CollectedHeap::object_iterate_since_last_GC(ObjectClosure* cl) { | |
| 2607 // FIXME: is this right? | |
| 2608 guarantee(false, "object_iterate_since_last_GC not supported by G1 heap"); | |
| 2609 } | |
| 2610 | |
| 2611 // Calls a SpaceClosure on a HeapRegion. | |
| 2612 | |
| 2613 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2614 SpaceClosure* _cl; | |
| 2615 public: | |
| 2616 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2617 bool doHeapRegion(HeapRegion* r) { | |
| 2618 _cl->do_space(r); | |
| 2619 return false; | |
| 2620 } | |
| 2621 }; | |
| 2622 | |
| 2623 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2624 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2625 heap_region_iterate(&blk); |
| 342 | 2626 } |
| 2627 | |
| 3766 | 2628 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
| 2629 _hrs.iterate(cl); | |
| 342 | 2630 } |
| 2631 | |
| 2632 void | |
| 2633 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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2634 uint worker_id, |
|
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|
2635 uint no_of_par_workers, |
| 342 | 2636 jint claim_value) { |
|
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2637 const uint regions = n_regions(); |
|
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|
2638 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
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|
2639 no_of_par_workers : |
|
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|
2640 1); |
|
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|
2641 assert(UseDynamicNumberOfGCThreads || |
|
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|
2642 no_of_par_workers == workers()->total_workers(), |
|
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|
2643 "Non dynamic should use fixed number of workers"); |
| 355 | 2644 // try to spread out the starting points of the workers |
|
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2645 const HeapRegion* start_hr = |
|
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2646 start_region_for_worker(worker_id, no_of_par_workers); |
|
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2647 const uint start_index = start_hr->hrs_index(); |
| 355 | 2648 |
| 2649 // each worker will actually look at all regions | |
|
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|
2650 for (uint count = 0; count < regions; ++count) { |
|
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|
2651 const uint index = (start_index + count) % regions; |
| 355 | 2652 assert(0 <= index && index < regions, "sanity"); |
| 2653 HeapRegion* r = region_at(index); | |
| 2654 // we'll ignore "continues humongous" regions (we'll process them | |
| 2655 // when we come across their corresponding "start humongous" | |
| 2656 // region) and regions already claimed | |
| 2657 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
| 2658 continue; | |
| 2659 } | |
| 2660 // OK, try to claim it | |
| 342 | 2661 if (r->claimHeapRegion(claim_value)) { |
| 355 | 2662 // success! |
| 2663 assert(!r->continuesHumongous(), "sanity"); | |
| 2664 if (r->startsHumongous()) { | |
| 2665 // If the region is "starts humongous" we'll iterate over its | |
| 2666 // "continues humongous" first; in fact we'll do them | |
| 2667 // first. The order is important. In on case, calling the | |
| 2668 // closure on the "starts humongous" region might de-allocate | |
| 2669 // and clear all its "continues humongous" regions and, as a | |
| 2670 // result, we might end up processing them twice. So, we'll do | |
| 2671 // them first (notice: most closures will ignore them anyway) and | |
| 2672 // then we'll do the "starts humongous" region. | |
|
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|
2673 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
| 355 | 2674 HeapRegion* chr = region_at(ch_index); |
| 2675 | |
| 2676 // if the region has already been claimed or it's not | |
| 2677 // "continues humongous" we're done | |
| 2678 if (chr->claim_value() == claim_value || | |
| 2679 !chr->continuesHumongous()) { | |
| 2680 break; | |
| 2681 } | |
| 2682 | |
| 2683 // Noone should have claimed it directly. We can given | |
| 2684 // that we claimed its "starts humongous" region. | |
| 2685 assert(chr->claim_value() != claim_value, "sanity"); | |
| 2686 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2687 | |
| 2688 if (chr->claimHeapRegion(claim_value)) { | |
| 2689 // we should always be able to claim it; noone else should | |
| 2690 // be trying to claim this region | |
| 2691 | |
| 2692 bool res2 = cl->doHeapRegion(chr); | |
| 2693 assert(!res2, "Should not abort"); | |
| 2694 | |
| 2695 // Right now, this holds (i.e., no closure that actually | |
| 2696 // does something with "continues humongous" regions | |
| 2697 // clears them). We might have to weaken it in the future, | |
| 2698 // but let's leave these two asserts here for extra safety. | |
| 2699 assert(chr->continuesHumongous(), "should still be the case"); | |
| 2700 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2701 } else { | |
| 2702 guarantee(false, "we should not reach here"); | |
| 2703 } | |
| 2704 } | |
| 2705 } | |
| 2706 | |
| 2707 assert(!r->continuesHumongous(), "sanity"); | |
| 2708 bool res = cl->doHeapRegion(r); | |
| 2709 assert(!res, "Should not abort"); | |
| 2710 } | |
| 2711 } | |
| 2712 } | |
| 2713 | |
| 390 | 2714 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2715 public: | |
| 2716 bool doHeapRegion(HeapRegion* r) { | |
| 2717 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2718 return false; | |
| 2719 } | |
| 2720 }; | |
| 2721 | |
|
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2722 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2723 ResetClaimValuesClosure blk; |
| 2724 heap_region_iterate(&blk); | |
| 2725 } | |
| 2726 | |
|
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2727 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
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2728 ResetClaimValuesClosure blk; |
|
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2729 collection_set_iterate(&blk); |
|
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|
2730 } |
|
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|
2731 |
| 355 | 2732 #ifdef ASSERT |
| 2733 // This checks whether all regions in the heap have the correct claim | |
| 2734 // value. I also piggy-backed on this a check to ensure that the | |
| 2735 // humongous_start_region() information on "continues humongous" | |
| 2736 // regions is correct. | |
| 2737 | |
| 2738 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2739 private: | |
| 2740 jint _claim_value; | |
|
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|
2741 uint _failures; |
| 355 | 2742 HeapRegion* _sh_region; |
|
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2743 |
| 355 | 2744 public: |
| 2745 CheckClaimValuesClosure(jint claim_value) : | |
| 2746 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2747 bool doHeapRegion(HeapRegion* r) { | |
| 2748 if (r->claim_value() != _claim_value) { | |
|
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|
2749 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2750 "claim value = %d, should be %d", |
|
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|
2751 HR_FORMAT_PARAMS(r), |
|
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|
2752 r->claim_value(), _claim_value); |
| 355 | 2753 ++_failures; |
| 2754 } | |
| 2755 if (!r->isHumongous()) { | |
| 2756 _sh_region = NULL; | |
| 2757 } else if (r->startsHumongous()) { | |
| 2758 _sh_region = r; | |
| 2759 } else if (r->continuesHumongous()) { | |
| 2760 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2761 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2762 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2763 HR_FORMAT_PARAMS(r), |
| 355 | 2764 r->humongous_start_region(), |
| 2765 _sh_region); | |
| 2766 ++_failures; | |
| 342 | 2767 } |
| 2768 } | |
| 355 | 2769 return false; |
| 2770 } | |
|
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|
2771 uint failures() { return _failures; } |
| 355 | 2772 }; |
| 2773 | |
| 2774 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2775 CheckClaimValuesClosure cl(claim_value); | |
| 2776 heap_region_iterate(&cl); | |
| 2777 return cl.failures() == 0; | |
| 2778 } | |
|
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|
2779 |
|
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|
2780 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
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2781 private: |
|
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|
2782 jint _claim_value; |
|
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|
2783 uint _failures; |
|
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|
2784 |
|
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|
2785 public: |
|
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|
2786 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
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|
2787 _claim_value(claim_value), _failures(0) { } |
|
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2788 |
|
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|
2789 uint failures() { return _failures; } |
|
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|
2790 |
|
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|
2791 bool doHeapRegion(HeapRegion* hr) { |
|
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|
2792 assert(hr->in_collection_set(), "how?"); |
|
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|
2793 assert(!hr->isHumongous(), "H-region in CSet"); |
|
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|
2794 if (hr->claim_value() != _claim_value) { |
|
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|
2795 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
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|
2796 "claim value = %d, should be %d", |
|
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|
2797 HR_FORMAT_PARAMS(hr), |
|
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|
2798 hr->claim_value(), _claim_value); |
|
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|
2799 _failures += 1; |
|
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|
2800 } |
|
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|
2801 return false; |
|
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|
2802 } |
|
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|
2803 }; |
|
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|
2804 |
|
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|
2805 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
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|
2806 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2807 collection_set_iterate(&cl); |
|
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|
2808 return cl.failures() == 0; |
|
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|
2809 } |
| 355 | 2810 #endif // ASSERT |
| 342 | 2811 |
|
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|
2812 // Clear the cached CSet starting regions and (more importantly) |
|
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|
2813 // the time stamps. Called when we reset the GC time stamp. |
|
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|
2814 void G1CollectedHeap::clear_cset_start_regions() { |
|
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|
2815 assert(_worker_cset_start_region != NULL, "sanity"); |
|
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|
2816 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
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|
2817 |
|
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|
2818 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
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|
2819 for (int i = 0; i < n_queues; i++) { |
|
fd2b426c30db
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|
2820 _worker_cset_start_region[i] = NULL; |
|
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|
2821 _worker_cset_start_region_time_stamp[i] = 0; |
|
fd2b426c30db
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|
2822 } |
|
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|
2823 } |
|
fd2b426c30db
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|
2824 |
|
fd2b426c30db
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changeset
|
2825 // Given the id of a worker, obtain or calculate a suitable |
|
fd2b426c30db
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|
2826 // starting region for iterating over the current collection set. |
|
4097
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|
2827 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(int worker_i) { |
|
4709
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2828 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
fd2b426c30db
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|
2829 |
|
fd2b426c30db
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changeset
|
2830 HeapRegion* result = NULL; |
|
fd2b426c30db
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|
2831 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
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|
2832 |
|
fd2b426c30db
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|
2833 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
|
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|
2834 // Cached starting region for current worker was set |
|
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|
2835 // during the current pause - so it's valid. |
|
fd2b426c30db
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|
2836 // Note: the cached starting heap region may be NULL |
|
fd2b426c30db
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|
2837 // (when the collection set is empty). |
|
fd2b426c30db
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changeset
|
2838 result = _worker_cset_start_region[worker_i]; |
|
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changeset
|
2839 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
fd2b426c30db
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|
2840 return result; |
|
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changeset
|
2841 } |
|
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|
2842 |
|
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|
2843 // The cached entry was not valid so let's calculate |
|
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|
2844 // a suitable starting heap region for this worker. |
|
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|
2845 |
|
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|
2846 // We want the parallel threads to start their collection |
|
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|
2847 // set iteration at different collection set regions to |
|
fd2b426c30db
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diff
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|
2848 // avoid contention. |
|
fd2b426c30db
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changeset
|
2849 // If we have: |
|
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changeset
|
2850 // n collection set regions |
|
fd2b426c30db
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|
2851 // p threads |
|
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changeset
|
2852 // Then thread t will start at region floor ((t * n) / p) |
|
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|
2853 |
|
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|
2854 result = g1_policy()->collection_set(); |
|
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|
2855 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
2856 uint cs_size = g1_policy()->cset_region_length(); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
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|
2857 uint active_workers = workers()->active_workers(); |
|
4709
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|
2858 assert(UseDynamicNumberOfGCThreads || |
|
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changeset
|
2859 active_workers == workers()->total_workers(), |
|
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|
2860 "Unless dynamic should use total workers"); |
|
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|
2861 |
|
6010
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|
2862 uint end_ind = (cs_size * worker_i) / active_workers; |
|
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|
2863 uint start_ind = 0; |
|
4709
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|
2864 |
|
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|
2865 if (worker_i > 0 && |
|
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changeset
|
2866 _worker_cset_start_region_time_stamp[worker_i - 1] == gc_time_stamp) { |
|
fd2b426c30db
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|
2867 // Previous workers starting region is valid |
|
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|
2868 // so let's iterate from there |
|
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changeset
|
2869 start_ind = (cs_size * (worker_i - 1)) / active_workers; |
|
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changeset
|
2870 result = _worker_cset_start_region[worker_i - 1]; |
|
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|
2871 } |
|
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parents:
4708
diff
changeset
|
2872 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2873 for (uint i = start_ind; i < end_ind; i++) { |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2874 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2875 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2876 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2877 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2878 // 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
|
2879 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2880 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
|
2881 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
|
2882 "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
|
2883 _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
|
2884 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2885 _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
|
2886 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2887 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2888 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2889 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2890 uint no_of_par_workers) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2891 uint worker_num = |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2892 G1CollectedHeap::use_parallel_gc_threads() ? no_of_par_workers : 1U; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2893 assert(UseDynamicNumberOfGCThreads || |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2894 no_of_par_workers == workers()->total_workers(), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2895 "Non dynamic should use fixed number of workers"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2896 const uint start_index = n_regions() * worker_i / worker_num; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2897 return region_at(start_index); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2898 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2899 |
| 342 | 2900 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2901 HeapRegion* r = g1_policy()->collection_set(); | |
| 2902 while (r != NULL) { | |
| 2903 HeapRegion* next = r->next_in_collection_set(); | |
| 2904 if (cl->doHeapRegion(r)) { | |
| 2905 cl->incomplete(); | |
| 2906 return; | |
| 2907 } | |
| 2908 r = next; | |
| 2909 } | |
| 2910 } | |
| 2911 | |
| 2912 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2913 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2914 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2915 // 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
|
2916 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2917 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2918 |
| 342 | 2919 assert(r->in_collection_set(), |
| 2920 "Start region must be a member of the collection set."); | |
| 2921 HeapRegion* cur = r; | |
| 2922 while (cur != NULL) { | |
| 2923 HeapRegion* next = cur->next_in_collection_set(); | |
| 2924 if (cl->doHeapRegion(cur) && false) { | |
| 2925 cl->incomplete(); | |
| 2926 return; | |
| 2927 } | |
| 2928 cur = next; | |
| 2929 } | |
| 2930 cur = g1_policy()->collection_set(); | |
| 2931 while (cur != r) { | |
| 2932 HeapRegion* next = cur->next_in_collection_set(); | |
| 2933 if (cl->doHeapRegion(cur) && false) { | |
| 2934 cl->incomplete(); | |
| 2935 return; | |
| 2936 } | |
| 2937 cur = next; | |
| 2938 } | |
| 2939 } | |
| 2940 | |
| 2941 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
| 3766 | 2942 return n_regions() > 0 ? region_at(0) : NULL; |
| 342 | 2943 } |
| 2944 | |
| 2945 | |
| 2946 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
| 2947 Space* res = heap_region_containing(addr); | |
| 2948 return res; | |
| 2949 } | |
| 2950 | |
| 2951 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2952 Space* sp = space_containing(addr); | |
| 2953 if (sp != NULL) { | |
| 2954 return sp->block_start(addr); | |
| 2955 } | |
| 2956 return NULL; | |
| 2957 } | |
| 2958 | |
| 2959 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 2960 Space* sp = space_containing(addr); | |
| 2961 assert(sp != NULL, "block_size of address outside of heap"); | |
| 2962 return sp->block_size(addr); | |
| 2963 } | |
| 2964 | |
| 2965 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 2966 Space* sp = space_containing(addr); | |
| 2967 return sp->block_is_obj(addr); | |
| 2968 } | |
| 2969 | |
| 2970 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 2971 return true; | |
| 2972 } | |
| 2973 | |
| 2974 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 2975 return HeapRegion::GrainBytes; | |
| 2976 } | |
| 2977 | |
| 2978 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 2979 // Return the remaining space in the cur alloc region, but not less than | |
| 2980 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2981 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2982 // 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
|
2983 // 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
|
2984 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2985 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2986 HeapRegion* hr = _mutator_alloc_region.get(); |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2987 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
|
2988 if (hr == NULL) { |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2989 return max_tlab_size; |
| 342 | 2990 } else { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2991 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab_size); |
| 342 | 2992 } |
| 2993 } | |
| 2994 | |
| 2995 size_t G1CollectedHeap::max_capacity() const { | |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2996 return _g1_reserved.byte_size(); |
| 342 | 2997 } |
| 2998 | |
| 2999 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 3000 // assert(false, "NYI"); | |
| 3001 return 0; | |
| 3002 } | |
| 3003 | |
| 3004 void G1CollectedHeap::prepare_for_verify() { | |
| 3005 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 3006 ensure_parsability(false); | |
| 3007 } | |
| 3008 g1_rem_set()->prepare_for_verify(); | |
| 3009 } | |
| 3010 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3011 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3012 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3013 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3014 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3015 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3016 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3017 return hr->obj_allocated_since_next_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3018 case VerifyOption_G1UseMarkWord: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3019 return false; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3020 default: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3021 ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3022 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3023 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3024 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3025 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3026 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3027 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3028 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3029 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3030 case VerifyOption_G1UseMarkWord: return NULL; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3031 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3032 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3033 return NULL; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3034 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3035 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3036 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3037 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3038 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3039 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3040 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3041 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3042 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3043 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3044 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3045 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3046 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3047 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3048 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3049 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3050 case VerifyOption_G1UseMarkWord: return "NONE"; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3051 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3052 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3053 return NULL; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3054 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3055 |
| 342 | 3056 class VerifyLivenessOopClosure: public OopClosure { |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3057 G1CollectedHeap* _g1h; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3058 VerifyOption _vo; |
| 342 | 3059 public: |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3060 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3061 _g1h(g1h), _vo(vo) |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3062 { } |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3063 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
|
3064 void do_oop( oop *p) { do_oop_work(p); } |
|
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3065 |
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|
3066 template <class T> void do_oop_work(T *p) { |
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3067 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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|
3068 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
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|
3069 "Dead object referenced by a not dead object"); |
| 342 | 3070 } |
| 3071 }; | |
| 3072 | |
| 3073 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3074 private: |
| 342 | 3075 G1CollectedHeap* _g1h; |
| 3076 size_t _live_bytes; | |
| 3077 HeapRegion *_hr; | |
|
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3078 VerifyOption _vo; |
| 342 | 3079 public: |
|
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3080 // _vo == UsePrevMarking -> use "prev" marking information, |
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3081 // _vo == UseNextMarking -> use "next" marking information, |
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3082 // _vo == UseMarkWord -> use mark word from object header. |
|
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3083 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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3084 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3085 _g1h = G1CollectedHeap::heap(); |
| 3086 } | |
| 3087 void do_object(oop o) { | |
|
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3088 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3089 assert(o != NULL, "Huh?"); |
|
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3090 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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3091 // If the object is alive according to the mark word, |
|
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|
3092 // then verify that the marking information agrees. |
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3093 // Note we can't verify the contra-positive of the |
|
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|
3094 // above: if the object is dead (according to the mark |
|
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|
3095 // word), it may not be marked, or may have been marked |
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|
3096 // but has since became dead, or may have been allocated |
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|
3097 // since the last marking. |
|
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|
3098 if (_vo == VerifyOption_G1UseMarkWord) { |
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|
3099 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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|
3100 } |
|
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|
3101 |
|
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|
3102 o->oop_iterate_no_header(&isLive); |
|
1389
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|
3103 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
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|
3104 size_t obj_size = o->size(); // Make sure we don't overflow |
|
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|
3105 _live_bytes += (obj_size * HeapWordSize); |
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|
3106 } |
| 342 | 3107 } |
| 3108 } | |
| 3109 size_t live_bytes() { return _live_bytes; } | |
| 3110 }; | |
| 3111 | |
| 3112 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3113 HeapRegion *_hr; | |
| 3114 G1CollectedHeap *_g1; | |
| 3115 public: | |
| 3116 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3117 _g1 = G1CollectedHeap::heap(); | |
| 3118 }; | |
| 3119 | |
| 3120 void do_object(oop o) { | |
| 3121 if (o != NULL) { | |
| 3122 HeapWord *start = (HeapWord *) o; | |
| 3123 size_t word_sz = o->size(); | |
| 3124 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3125 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3126 (void*) o, word_sz, | |
| 3127 _g1->isMarkedPrev(o), | |
| 3128 _g1->isMarkedNext(o), | |
| 3129 _hr->obj_allocated_since_prev_marking(o)); | |
| 3130 HeapWord *end = start + word_sz; | |
| 3131 HeapWord *cur; | |
| 3132 int *val; | |
| 3133 for (cur = start; cur < end; cur++) { | |
| 3134 val = (int *) cur; | |
| 3135 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3136 } | |
| 3137 } | |
| 3138 } | |
| 3139 }; | |
| 3140 | |
| 3141 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3142 private: |
|
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|
3143 bool _par; |
|
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|
3144 VerifyOption _vo; |
|
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|
3145 bool _failures; |
| 811 | 3146 public: |
|
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|
3147 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3148 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3149 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3150 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3151 : _par(par), | |
|
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|
3152 _vo(vo), |
|
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|
3153 _failures(false) {} |
|
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|
3154 |
|
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|
3155 bool failures() { |
|
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|
3156 return _failures; |
|
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|
3157 } |
|
845
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|
3158 |
| 342 | 3159 bool doHeapRegion(HeapRegion* r) { |
|
637
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|
3160 if (!r->continuesHumongous()) { |
|
1020
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|
3161 bool failures = false; |
| 6008 | 3162 r->verify(_vo, &failures); |
|
1020
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|
3163 if (failures) { |
|
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|
3164 _failures = true; |
|
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|
3165 } else { |
|
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|
3166 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
1020
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|
3167 r->object_iterate(¬_dead_yet_cl); |
|
4787
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|
3168 if (_vo != VerifyOption_G1UseNextMarking) { |
|
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|
3169 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
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|
3170 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
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|
3171 "max_live_bytes "SIZE_FORMAT" " |
|
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changeset
|
3172 "< calculated "SIZE_FORMAT, |
|
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|
3173 r->bottom(), r->end(), |
|
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|
3174 r->max_live_bytes(), |
|
1020
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|
3175 not_dead_yet_cl.live_bytes()); |
|
4787
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|
3176 _failures = true; |
|
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|
3177 } |
|
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diff
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|
3178 } else { |
|
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changeset
|
3179 // When vo == UseNextMarking we cannot currently do a sanity |
|
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|
3180 // check on the live bytes as the calculation has not been |
|
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|
3181 // finalized yet. |
|
1020
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|
3182 } |
|
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|
3183 } |
| 342 | 3184 } |
|
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|
3185 return false; // stop the region iteration if we hit a failure |
| 342 | 3186 } |
| 3187 }; | |
| 3188 | |
|
6725
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|
3189 class YoungRefCounterClosure : public OopClosure { |
|
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|
3190 G1CollectedHeap* _g1h; |
|
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|
3191 int _count; |
|
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|
3192 public: |
|
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|
3193 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} |
|
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|
3194 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } |
|
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|
3195 void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
|
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|
3196 |
|
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|
3197 int count() { return _count; } |
|
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|
3198 void reset_count() { _count = 0; }; |
|
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|
3199 }; |
|
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|
3200 |
|
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|
3201 class VerifyKlassClosure: public KlassClosure { |
|
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diff
changeset
|
3202 YoungRefCounterClosure _young_ref_counter_closure; |
|
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|
3203 OopClosure *_oop_closure; |
|
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|
3204 public: |
|
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changeset
|
3205 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} |
|
da91efe96a93
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|
3206 void do_klass(Klass* k) { |
|
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|
3207 k->oops_do(_oop_closure); |
|
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|
3208 |
|
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|
3209 _young_ref_counter_closure.reset_count(); |
|
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|
3210 k->oops_do(&_young_ref_counter_closure); |
|
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|
3211 if (_young_ref_counter_closure.count() > 0) { |
|
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|
3212 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); |
|
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|
3213 } |
|
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|
3214 } |
|
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|
3215 }; |
|
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|
3216 |
|
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|
3217 // TODO: VerifyRootsClosure extends OopsInGenClosure so that we can |
|
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|
3218 // pass it as the perm_blk to SharedHeap::process_strong_roots. |
|
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|
3219 // When process_strong_roots stop calling perm_blk->younger_refs_iterate |
|
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|
3220 // we can change this closure to extend the simpler OopClosure. |
| 342 | 3221 class VerifyRootsClosure: public OopsInGenClosure { |
| 3222 private: | |
| 3223 G1CollectedHeap* _g1h; | |
|
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|
3224 VerifyOption _vo; |
| 342 | 3225 bool _failures; |
| 3226 public: | |
|
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|
3227 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3228 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3229 // _vo == UseMarkWord -> use mark word from object header. |
|
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|
3230 VerifyRootsClosure(VerifyOption vo) : |
|
845
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|
3231 _g1h(G1CollectedHeap::heap()), |
|
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|
3232 _vo(vo), |
|
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|
3233 _failures(false) { } |
| 342 | 3234 |
| 3235 bool failures() { return _failures; } | |
| 3236 | |
|
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
3237 template <class T> void do_oop_nv(T* p) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
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|
3238 T heap_oop = oopDesc::load_heap_oop(p); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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|
3239 if (!oopDesc::is_null(heap_oop)) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
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|
3240 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
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|
3241 if (_g1h->is_obj_dead_cond(obj, _vo)) { |
| 342 | 3242 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " |
|
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|
3243 "points to dead obj "PTR_FORMAT, p, (void*) obj); |
|
3772
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|
3244 if (_vo == VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
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changeset
|
3245 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); |
|
6747fd0512e0
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|
3246 } |
| 342 | 3247 obj->print_on(gclog_or_tty); |
| 3248 _failures = true; | |
| 3249 } | |
| 3250 } | |
| 3251 } | |
|
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|
3252 |
|
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|
3253 void do_oop(oop* p) { do_oop_nv(p); } |
|
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diff
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|
3254 void do_oop(narrowOop* p) { do_oop_nv(p); } |
| 342 | 3255 }; |
| 3256 | |
| 390 | 3257 // This is the task used for parallel heap verification. |
| 3258 | |
| 3259 class G1ParVerifyTask: public AbstractGangTask { | |
| 3260 private: | |
| 3261 G1CollectedHeap* _g1h; | |
|
3772
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changeset
|
3262 VerifyOption _vo; |
|
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changeset
|
3263 bool _failures; |
| 390 | 3264 |
| 3265 public: | |
|
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|
3266 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3267 // _vo == UseNextMarking -> use "next" marking information, |
|
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changeset
|
3268 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3269 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3270 AbstractGangTask("Parallel verify task"), |
|
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|
3271 _g1h(g1h), |
|
3772
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|
3272 _vo(vo), |
|
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|
3273 _failures(false) { } |
|
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|
3274 |
|
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|
3275 bool failures() { |
|
ff2402f6a50b
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|
3276 return _failures; |
|
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|
3277 } |
| 390 | 3278 |
|
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7121618: Change type of number of GC workers to unsigned int.
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|
3279 void work(uint worker_id) { |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3280 HandleMark hm; |
| 6008 | 3281 VerifyRegionClosure blk(true, _vo); |
|
4728
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|
3282 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
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|
3283 _g1h->workers()->active_workers(), |
| 390 | 3284 HeapRegion::ParVerifyClaimValue); |
|
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|
3285 if (blk.failures()) { |
|
ff2402f6a50b
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|
3286 _failures = true; |
|
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changeset
|
3287 } |
| 390 | 3288 } |
| 3289 }; | |
| 3290 | |
| 6008 | 3291 void G1CollectedHeap::verify(bool silent) { |
| 3292 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3293 } | |
| 3294 | |
| 3295 void G1CollectedHeap::verify(bool silent, | |
|
3772
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|
3296 VerifyOption vo) { |
|
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|
3297 if (SafepointSynchronize::is_at_safepoint()) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
3298 if (!silent) { gclog_or_tty->print("Roots "); } |
|
3772
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|
3299 VerifyRootsClosure rootsCl(vo); |
|
4095
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|
3300 |
|
bca17e38de00
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|
3301 assert(Thread::current()->is_VM_thread(), |
|
8855
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changeset
|
3302 "Expected to be executed serially by the VM thread at this point"); |
|
4095
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|
3303 |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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diff
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|
3304 CodeBlobToOopClosure blobsCl(&rootsCl, /*do_marking=*/ false); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
3305 VerifyKlassClosure klassCl(this, &rootsCl); |
|
3772
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|
3306 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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3289
diff
changeset
|
3307 // We apply the relevant closures to all the oops in the |
|
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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diff
changeset
|
3308 // 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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4875
diff
changeset
|
3309 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
|
3772
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|
3310 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
3311 // Need cleared claim bits for the strong roots processing |
|
da91efe96a93
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changeset
|
3312 ClassLoaderDataGraph::clear_claimed_marks(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
3313 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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3289
diff
changeset
|
3314 process_strong_roots(true, // activate StrongRootsScope |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
3315 false, // we set "is scavenging" to false, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3316 // so we don't reset the dirty cards. |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
changeset
|
3317 ScanningOption(so), // roots scanning options |
| 342 | 3318 &rootsCl, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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890
diff
changeset
|
3319 &blobsCl, |
|
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
3320 &klassCl |
|
da91efe96a93
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6629
diff
changeset
|
3321 ); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
3322 |
|
1020
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diff
changeset
|
3323 bool failures = rootsCl.failures(); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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3766
diff
changeset
|
3324 |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
3325 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3326 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3327 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3328 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3329 // the region sets when not in a full GC. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3330 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3331 verify_region_sets(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3332 } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3333 |
| 2152 | 3334 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3335 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3336 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3337 "sanity check"); | |
| 3338 | |
| 6008 | 3339 G1ParVerifyTask task(this, vo); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
3340 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
3341 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
3342 "If not dynamic should be using all the workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
3343 int n_workers = workers()->active_workers(); |
| 390 | 3344 set_par_threads(n_workers); |
| 3345 workers()->run_task(&task); | |
| 3346 set_par_threads(0); | |
|
1020
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6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3347 if (task.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3348 failures = true; |
|
ff2402f6a50b
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diff
changeset
|
3349 } |
| 390 | 3350 |
|
4095
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4090
diff
changeset
|
3351 // Checks that the expected amount of parallel work was done. |
|
bca17e38de00
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4090
diff
changeset
|
3352 // The implication is that n_workers is > 0. |
| 390 | 3353 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3354 "sanity check"); | |
| 3355 | |
| 3356 reset_heap_region_claim_values(); | |
| 3357 | |
| 3358 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3359 "sanity check"); | |
| 3360 } else { | |
| 6008 | 3361 VerifyRegionClosure blk(false, vo); |
| 3766 | 3362 heap_region_iterate(&blk); |
|
1020
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1019
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changeset
|
3363 if (blk.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3364 failures = true; |
|
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changeset
|
3365 } |
| 390 | 3366 } |
| 2152 | 3367 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3368 rem_set()->verify(); |
|
1020
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|
3369 |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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changeset
|
3370 if (failures) { |
|
ff2402f6a50b
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1019
diff
changeset
|
3371 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3372 // It helps to have the per-region information in the output to |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3373 // help us track down what went wrong. This is why we call |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3374 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3375 print_extended_on(gclog_or_tty); |
|
1020
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changeset
|
3376 gclog_or_tty->print_cr(""); |
|
1547
fb1a39993f69
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jcoomes
parents:
1545
diff
changeset
|
3377 #ifndef PRODUCT |
| 1044 | 3378 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3379 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
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3766
diff
changeset
|
3380 vo, false /* all */); |
|
1020
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diff
changeset
|
3381 } |
|
1547
fb1a39993f69
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1545
diff
changeset
|
3382 #endif |
|
1020
ff2402f6a50b
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1019
diff
changeset
|
3383 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3384 } |
|
ff2402f6a50b
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1019
diff
changeset
|
3385 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3386 } else { |
|
8855
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changeset
|
3387 if (!silent) |
|
24ef5fb05e0f
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changeset
|
3388 gclog_or_tty->print("(SKIPPING roots, heapRegionSets, heapRegions, remset) "); |
| 342 | 3389 } |
| 3390 } | |
| 3391 | |
| 3392 class PrintRegionClosure: public HeapRegionClosure { | |
| 3393 outputStream* _st; | |
| 3394 public: | |
| 3395 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3396 bool doHeapRegion(HeapRegion* r) { | |
| 3397 r->print_on(_st); | |
| 3398 return false; | |
| 3399 } | |
| 3400 }; | |
| 3401 | |
| 3402 void G1CollectedHeap::print_on(outputStream* st) const { | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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811
diff
changeset
|
3403 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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811
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changeset
|
3404 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
|
3405 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3406 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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parents:
811
diff
changeset
|
3407 _g1_storage.low_boundary(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3408 _g1_storage.high(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3409 _g1_storage.high_boundary()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3410 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3411 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3412 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3413 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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parents:
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diff
changeset
|
3414 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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parents:
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diff
changeset
|
3415 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
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diff
changeset
|
3416 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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parents:
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diff
changeset
|
3417 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
changeset
|
3418 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3419 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3420 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
4072
diff
changeset
|
3421 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
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diff
changeset
|
3422 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3423 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3424 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3425 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
changeset
|
3426 st->cr(); |
|
6010
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diff
changeset
|
3427 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
|
720b6a76dd9d
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diff
changeset
|
3428 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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|
3429 "CS=collection set, F=free, TS=gc time stamp, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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diff
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|
3430 "PTAMS=previous top-at-mark-start, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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diff
changeset
|
3431 "NTAMS=next top-at-mark-start)"); |
| 342 | 3432 PrintRegionClosure blk(st); |
| 3766 | 3433 heap_region_iterate(&blk); |
| 342 | 3434 } |
| 3435 | |
| 3436 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3437 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3438 workers()->print_worker_threads_on(st); |
| 3439 } | |
| 3440 _cmThread->print_on(st); | |
| 342 | 3441 st->cr(); |
| 1019 | 3442 _cm->print_worker_threads_on(st); |
| 3443 _cg1r->print_worker_threads_on(st); | |
| 342 | 3444 } |
| 3445 | |
| 3446 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
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6984287: Regularize how GC parallel workers are specified.
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diff
changeset
|
3447 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3448 workers()->threads_do(tc); |
| 3449 } | |
| 3450 tc->do_thread(_cmThread); | |
| 794 | 3451 _cg1r->threads_do(tc); |
| 342 | 3452 } |
| 3453 | |
| 3454 void G1CollectedHeap::print_tracing_info() const { | |
| 3455 // We'll overload this to mean "trace GC pause statistics." | |
| 3456 if (TraceGen0Time || TraceGen1Time) { | |
| 3457 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3458 // to that. | |
| 3459 g1_policy()->print_tracing_info(); | |
| 3460 } | |
| 751 | 3461 if (G1SummarizeRSetStats) { |
| 342 | 3462 g1_rem_set()->print_summary_info(); |
| 3463 } | |
| 1282 | 3464 if (G1SummarizeConcMark) { |
| 342 | 3465 concurrent_mark()->print_summary_info(); |
| 3466 } | |
| 3467 g1_policy()->print_yg_surv_rate_info(); | |
| 3468 SpecializationStats::print(); | |
| 3469 } | |
| 3470 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3471 #ifndef PRODUCT |
|
e8b0b0392037
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diff
changeset
|
3472 // Helpful for debugging RSet issues. |
|
e8b0b0392037
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diff
changeset
|
3473 |
|
e8b0b0392037
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changeset
|
3474 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3475 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3476 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3477 size_t _occupied_sum; |
|
e8b0b0392037
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parents:
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changeset
|
3478 |
|
e8b0b0392037
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changeset
|
3479 public: |
|
e8b0b0392037
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parents:
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diff
changeset
|
3480 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3481 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
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parents:
3774
diff
changeset
|
3482 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
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parents:
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diff
changeset
|
3483 _occupied_sum += occupied; |
|
e8b0b0392037
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tonyp
parents:
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changeset
|
3484 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3485 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3486 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3487 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3488 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3489 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3490 hrrs->print(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3491 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3492 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3493 return false; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3494 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3495 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3496 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3497 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3498 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3499 gclog_or_tty->print_cr(msg); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3500 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3501 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3502 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3503 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3504 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3505 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3506 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3507 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3508 }; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3509 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3510 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3511 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3512 collection_set_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3513 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3514 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3515 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3516 PrintRSetsClosure cl("Printing All RSets");; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3517 heap_region_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3518 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3519 #endif // PRODUCT |
|
e8b0b0392037
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parents:
3774
diff
changeset
|
3520 |
| 342 | 3521 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3522 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3523 "not a garbage-first heap"); | |
| 3524 return _g1h; | |
| 3525 } | |
| 3526 | |
| 3527 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3528 // always_do_update_barrier = false; |
| 342 | 3529 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3530 // Call allocation profiler | |
| 3531 AllocationProfiler::iterate_since_last_gc(); | |
| 3532 // Fill TLAB's and such | |
| 3533 ensure_parsability(true); | |
| 3534 } | |
| 3535 | |
| 3536 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
| 3537 // FIXME: what is this about? | |
| 3538 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3539 // is set. | |
| 3540 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3541 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3542 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3543 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3544 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3545 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3546 Universe::update_heap_info_at_gc(); |
| 342 | 3547 } |
| 3548 | |
| 1973 | 3549 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3550 unsigned int gc_count_before, | |
| 3551 bool* succeeded) { | |
| 3552 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 3553 g1_policy()->record_stop_world_start(); |
| 1973 | 3554 VM_G1IncCollectionPause op(gc_count_before, |
| 3555 word_size, | |
| 3556 false, /* should_initiate_conc_mark */ | |
| 3557 g1_policy()->max_pause_time_ms(), | |
| 3558 GCCause::_g1_inc_collection_pause); | |
| 3559 VMThread::execute(&op); | |
| 3560 | |
| 3561 HeapWord* result = op.result(); | |
| 3562 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3563 assert(result == NULL || ret_succeeded, | |
| 3564 "the result should be NULL if the VM did not succeed"); | |
| 3565 *succeeded = ret_succeeded; | |
| 3566 | |
| 3567 assert_heap_not_locked(); | |
| 3568 return result; | |
| 342 | 3569 } |
| 3570 | |
| 3571 void | |
| 3572 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3573 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3574 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3575 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3576 CGC_lock->notify(); |
| 342 | 3577 } |
| 3578 } | |
| 3579 | |
| 3580 size_t G1CollectedHeap::pending_card_num() { | |
| 3581 size_t extra_cards = 0; | |
| 3582 JavaThread *curr = Threads::first(); | |
| 3583 while (curr != NULL) { | |
| 3584 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3585 extra_cards += dcq.size(); | |
| 3586 curr = curr->next(); | |
| 3587 } | |
| 3588 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3589 size_t buffer_size = dcqs.buffer_size(); | |
| 3590 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3591 |
| 3592 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3593 // in bytes - not the number of 'entries'. We need to convert | |
| 3594 // into a number of cards. | |
| 3595 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3596 } |
| 3597 | |
| 3598 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3599 return g1_rem_set()->cardsScanned(); |
| 342 | 3600 } |
| 3601 | |
| 3602 void | |
| 3603 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
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7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3604 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3605 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3606 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3607 if (_surviving_young_words == NULL) { |
| 3608 vm_exit_out_of_memory(sizeof(size_t) * array_length, | |
| 3609 "Not enough space for young surv words summary."); | |
| 3610 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3611 memset(_surviving_young_words, 0, (size_t) array_length * sizeof(size_t)); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3612 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3613 for (uint i = 0; i < array_length; ++i) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3614 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3615 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3616 #endif // !ASSERT |
| 342 | 3617 } |
| 3618 | |
| 3619 void | |
| 3620 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3621 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3622 uint array_length = g1_policy()->young_cset_region_length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3623 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3624 _surviving_young_words[i] += surv_young_words[i]; |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3625 } |
| 342 | 3626 } |
| 3627 | |
| 3628 void | |
| 3629 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3630 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3631 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3632 _surviving_young_words = NULL; |
| 3633 } | |
| 3634 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3635 #ifdef ASSERT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3636 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3637 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3638 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3639 // Here we check that the CSet region's RSet is ready for parallel |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3640 // iteration. The fields that we'll verify are only manipulated |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3641 // when the region is part of a CSet and is collected. Afterwards, |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3642 // we reset these fields when we clear the region's RSet (when the |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3643 // region is freed) so they are ready when the region is |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3644 // re-allocated. The only exception to this is if there's an |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3645 // evacuation failure and instead of freeing the region we leave |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3646 // it in the heap. In that case, we reset these fields during |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3647 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3648 guarantee(hr->rem_set()->verify_ready_for_par_iteration(), "verification"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3649 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3650 // Here's a good place to add any other checks we'd like to |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3651 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3652 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3653 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3654 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3655 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3656 |
| 1709 | 3657 #if TASKQUEUE_STATS |
| 3658 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3659 st->print_raw_cr("GC Task Stats"); | |
| 3660 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3661 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3662 } | |
| 3663 | |
| 3664 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3665 print_taskqueue_stats_hdr(st); | |
| 3666 | |
| 3667 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3668 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3669 for (int i = 0; i < n; ++i) { |
| 3670 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3671 totals += task_queue(i)->stats; | |
| 3672 } | |
| 3673 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3674 | |
| 3675 DEBUG_ONLY(totals.verify()); | |
| 3676 } | |
| 3677 | |
| 3678 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3679 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3680 for (int i = 0; i < n; ++i) { |
| 3681 task_queue(i)->stats.reset(); | |
| 3682 } | |
| 3683 } | |
| 3684 #endif // TASKQUEUE_STATS | |
| 3685 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3686 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3687 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3688 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3689 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3690 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3691 gclog_or_tty->date_stamp(PrintGCDateStamps); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3692 gclog_or_tty->stamp(PrintGCTimeStamps); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3693 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3694 GCCauseString gc_cause_str = GCCauseString("GC pause", gc_cause()) |
|
7455
0b54ffe4c2d3
8005672: Clean up some changes to GC logging with GCCause's
jmasa
parents:
7397
diff
changeset
|
3695 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3696 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3697 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3698 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3699 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3700 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3701 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3702 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3703 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3704 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3705 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3706 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3707 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3708 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3709 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3710 gclog_or_tty->print_cr(", %3.7f secs]", pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3711 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3712 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3713 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3714 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3715 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3716 gclog_or_tty->print("--"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3717 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3718 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3719 gclog_or_tty->print_cr(", %3.7f secs]", pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3720 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3721 gclog_or_tty->flush(); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3722 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3723 |
| 1973 | 3724 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3725 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3726 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3727 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3728 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3729 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3730 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3731 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3732 |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3733 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3734 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3735 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3736 print_heap_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3737 |
| 4072 | 3738 HRSPhaseSetter x(HRSPhaseEvacuation); |
| 2152 | 3739 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3740 verify_dirty_young_regions(); |
| 2152 | 3741 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3742 // 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
|
3743 // 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
|
3744 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3745 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3746 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3747 // 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
|
3748 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3749 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3750 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3751 // 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
|
3752 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
|
3753 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3754 // 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
|
3755 // 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
|
3756 // 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
|
3757 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
|
3758 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3759 // 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
|
3760 { |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3761 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3762 // 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
|
3763 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3764 increment_old_marking_cycles_started(); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3765 } |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3766 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3767 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3768 int active_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3769 workers()->active_workers() : 1); |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3770 double pause_start_sec = os::elapsedTime(); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3771 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3772 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3773 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3774 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3775 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3776 |
| 2361 | 3777 // If the secondary_free_list is not empty, append it to the |
| 3778 // free_list. No need to wait for the cleanup operation to finish; | |
| 3779 // the region allocation code will check the secondary_free_list | |
| 3780 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3781 // set, skip this step so that the region allocation code has to | |
| 3782 // get entries from the secondary_free_list. | |
| 2152 | 3783 if (!G1StressConcRegionFreeing) { |
| 2361 | 3784 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3785 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3786 |
|
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3787 assert(check_young_list_well_formed(), |
|
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3788 "young list should be well formed"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3789 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3790 // 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
|
3791 // 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
|
3792 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3793 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3794 { // 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
|
3795 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3796 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3797 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3798 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
|
3799 increment_gc_time_stamp(); |
| 342 | 3800 |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3801 verify_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3802 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3803 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3804 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3805 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3806 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3807 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3808 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3809 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3810 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3811 true /*verify_no_refs*/); |
|
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 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3814 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3815 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3816 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3817 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3818 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3819 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3820 // 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
|
3821 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3822 release_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3823 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3824 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3825 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3826 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3827 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3828 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3829 // This timing is only used by the ergonomics to handle our pause target. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3830 // It is unclear why this should not include the full pause. We will |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3831 // investigate this in CR 7178365. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3832 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3833 // Preserving the old comment here if that helps the investigation: |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3834 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3835 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3836 // the possible verification above. |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3837 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3838 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3839 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3840 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3841 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3842 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
|
3843 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3844 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
3845 g1_policy()->record_collection_pause_start(sample_start_time_sec); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3846 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3847 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3848 // 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
|
3849 // 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
|
3850 // 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
|
3851 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3852 bool waited = _cm->root_regions()->wait_until_scan_finished(); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3853 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3854 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3855 double scan_wait_end = os::elapsedTime(); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3856 wait_time_ms = (scan_wait_end - scan_wait_start) * 1000.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3857 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3858 g1_policy()->phase_times()->record_root_region_scan_wait_time(wait_time_ms); |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3859 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3860 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3861 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3862 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3863 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3864 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3865 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3866 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3867 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3868 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3869 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3870 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3871 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3872 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
|
3873 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3874 |
|
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
3875 g1_policy()->finalize_cset(target_pause_time_ms); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3876 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3877 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3878 // 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
|
3879 // we have not filtered them yet (we'll do so during the |
|
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
3880 // GC). We also call this after finalize_cset() to |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3881 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3882 _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
|
3883 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3884 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3885 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3886 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3887 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3888 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3889 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3890 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3891 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3892 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3893 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3894 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3895 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3896 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3897 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3898 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3899 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3900 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3901 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3902 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3903 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3904 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3905 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3906 #endif // ASSERT |
| 1707 | 3907 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3908 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3909 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3910 // Initialize the GC alloc regions. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3911 init_gc_alloc_regions(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3912 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3913 // Actually do the work... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3914 evacuate_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3915 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3916 // 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
|
3917 // (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
|
3918 // 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
|
3919 // 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
|
3920 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3921 _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
|
3922 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3923 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3924 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3925 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3926 free_collection_set(g1_policy()->collection_set()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3927 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3928 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3929 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3930 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3931 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3932 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3933 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3934 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3935 // regions to the incremental collection set for the next |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3936 // evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3937 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3938 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3939 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3940 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3941 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3942 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3943 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3944 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3945 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3946 "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
|
3947 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3948 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3949 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3950 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3951 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3952 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3953 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3954 _young_list->first_survivor_region(), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3955 _young_list->last_survivor_region()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3956 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3957 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3958 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3959 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3960 _summary_bytes_used = recalculate_used(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3961 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3962 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3963 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3964 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3965 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3966 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3967 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3968 // 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
|
3969 // 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
|
3970 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3971 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3972 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3973 // 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
|
3974 // 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
|
3975 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3976 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3977 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3978 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
3979 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3980 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3981 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3982 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3983 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
|
3984 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3985 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3986 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3987 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3988 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3989 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3990 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3991 size_t bytes_before = capacity(); |
| 4785 | 3992 // No need for an ergo verbose message here, |
| 3993 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3994 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3995 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3996 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3998 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3999 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4000 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4001 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4002 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4003 // 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
|
4004 // 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
|
4005 _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
|
4006 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4007 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4008 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4009 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4010 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4011 // This timing is only used by the ergonomics to handle our pause target. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4012 // It is unclear why this should not include the full pause. We will |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4013 // investigate this in CR 7178365. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4014 double sample_end_time_sec = os::elapsedTime(); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4015 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4016 g1_policy()->record_collection_pause_end(pause_time_ms); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4017 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4018 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4019 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4020 // 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
|
4021 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 // 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
|
4024 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4027 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4028 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4029 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4030 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 // 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
|
4032 // 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
|
4033 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4034 // 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
|
4035 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4036 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4038 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4039 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4040 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4043 verify_after_gc(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4044 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4045 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4046 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4047 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4048 // 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
|
4049 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4050 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4051 // 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
|
4052 // 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
|
4053 // 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
|
4054 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4055 _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
|
4056 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4057 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4058 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4059 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4060 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4061 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4062 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4063 #endif |
| 342 | 4064 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4065 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4066 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4067 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4068 // Print the remainder of the GC log output. |
|
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4069 log_gc_footer(os::elapsedTime() - pause_start_sec); |
|
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4070 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4071 // It is not yet to safe to tell the concurrent mark to |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4072 // start as we have some optional output below. We don't want the |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4073 // output from the concurrent mark thread interfering with this |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4074 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4075 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4076 _hrs.verify_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4077 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4078 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4079 TASKQUEUE_STATS_ONLY(if (ParallelGCVerbose) print_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4080 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4081 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4082 print_heap_after_gc(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4083 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4084 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4085 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4086 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4087 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4088 g1mm()->update_sizes(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4089 } |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
4090 |
|
884
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4091 if (G1SummarizeRSetStats && |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4092 (G1SummarizeRSetStatsPeriod > 0) && |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4093 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4094 g1_rem_set()->print_summary_info(); |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4095 } |
| 1973 | 4096 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4097 // 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
|
4098 // 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
|
4099 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4100 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4101 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4102 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4103 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4104 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4105 // 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
|
4106 // 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
|
4107 // 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
|
4108 // ConcurrentGCThread::safepoint_desynchronize(). |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4109 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4110 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4111 |
| 1973 | 4112 return true; |
| 342 | 4113 } |
| 4114 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4115 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4116 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4117 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4118 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4119 case GCAllocForSurvived: |
| 6595 | 4120 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4121 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4122 case GCAllocForTenured: |
| 6595 | 4123 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4124 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4125 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4126 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4127 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4128 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4129 } |
| 6595 | 4130 |
| 4131 // Prevent humongous PLAB sizes for two reasons: | |
| 4132 // * PLABs are allocated using a similar paths as oops, but should | |
| 4133 // never be in a humongous region | |
| 4134 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4135 return MIN2(_humongous_object_threshold_in_words, gclab_word_size); | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
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diff
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|
4136 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
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diff
changeset
|
4137 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
4138 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
4139 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
4140 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
4141 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
4142 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
4143 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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changeset
|
4144 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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changeset
|
4145 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
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|
4146 } |
|
1391
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|
4147 |
|
3830
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|
4148 void G1CollectedHeap::init_gc_alloc_regions() { |
|
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changeset
|
4149 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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|
4150 |
|
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changeset
|
4151 _survivor_gc_alloc_region.init(); |
|
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|
4152 _old_gc_alloc_region.init(); |
|
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|
4153 HeapRegion* retained_region = _retained_old_gc_alloc_region; |
|
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|
4154 _retained_old_gc_alloc_region = NULL; |
|
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|
4155 |
|
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|
4156 // We will discard the current GC alloc region if: |
|
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|
4157 // a) it's in the collection set (it can happen!), |
|
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|
4158 // b) it's already full (no point in using it), |
|
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changeset
|
4159 // c) it's empty (this means that it was emptied during |
|
f44782f04dd4
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changeset
|
4160 // a cleanup and it should be on the free list now), or |
|
f44782f04dd4
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changeset
|
4161 // d) it's humongous (this means that it was emptied |
|
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changeset
|
4162 // during a cleanup and was added to the free list, but |
|
f44782f04dd4
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changeset
|
4163 // has been subseqently used to allocate a humongous |
|
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changeset
|
4164 // object that may be less than the region size). |
|
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changeset
|
4165 if (retained_region != NULL && |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
4166 !retained_region->in_collection_set() && |
|
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changeset
|
4167 !(retained_region->top() == retained_region->end()) && |
|
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changeset
|
4168 !retained_region->is_empty() && |
|
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changeset
|
4169 !retained_region->isHumongous()) { |
|
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changeset
|
4170 retained_region->set_saved_mark(); |
| 4072 | 4171 // The retained region was added to the old region set when it was |
| 4172 // retired. We have to remove it now, since we don't allow regions | |
| 4173 // we allocate to in the region sets. We'll re-add it later, when | |
| 4174 // it's retired again. | |
| 4175 _old_set.remove(retained_region); | |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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changeset
|
4176 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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changeset
|
4177 retained_region->note_start_of_copying(during_im); |
|
3830
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|
4178 _old_gc_alloc_region.set(retained_region); |
|
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changeset
|
4179 _hr_printer.reuse(retained_region); |
| 342 | 4180 } |
| 4181 } | |
| 4182 | |
| 6819 | 4183 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers) { |
|
3830
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changeset
|
4184 _survivor_gc_alloc_region.release(); |
|
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changeset
|
4185 // 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
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changeset
|
4186 // _retained_old_gc_alloc_region. If we don't |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
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changeset
|
4187 // _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
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changeset
|
4188 // want either way so no reason to check explicitly for either |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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changeset
|
4189 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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changeset
|
4190 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 6595 | 4191 |
| 4192 if (ResizePLAB) { | |
| 6819 | 4193 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
| 4194 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
| 6595 | 4195 } |
| 342 | 4196 } |
| 4197 | |
|
3830
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
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diff
changeset
|
4198 void G1CollectedHeap::abandon_gc_alloc_regions() { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
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changeset
|
4199 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
|
4200 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:
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diff
changeset
|
4201 _retained_old_gc_alloc_region = NULL; |
| 342 | 4202 } |
| 4203 | |
| 4204 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4205 _drain_in_progress = false; | |
| 4206 set_evac_failure_closure(cl); | |
| 6197 | 4207 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4208 } |
| 4209 | |
| 4210 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4211 assert(_evac_failure_scan_stack != NULL && | |
| 4212 _evac_failure_scan_stack->length() == 0, | |
| 4213 "Postcondition"); | |
| 4214 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4215 delete _evac_failure_scan_stack; |
| 342 | 4216 _evac_failure_scan_stack = NULL; |
| 4217 } | |
| 4218 | |
| 4219 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
|
4220 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
|
4221 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4222 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4223 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4224 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4225 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4226 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4227 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4228 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4229 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4230 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4231 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4232 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
|
4233 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4234 // 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
|
4235 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4236 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4237 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4238 |
| 4239 // Now restore saved marks, if any. | |
|
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4240 assert(_objs_with_preserved_marks.size() == |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4241 _preserved_marks_of_objs.size(), "Both or none."); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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7455
diff
changeset
|
4242 while (!_objs_with_preserved_marks.is_empty()) { |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4243 oop obj = _objs_with_preserved_marks.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4244 markOop m = _preserved_marks_of_objs.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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7455
diff
changeset
|
4245 obj->set_mark(m); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4246 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4247 _objs_with_preserved_marks.clear(true); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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7455
diff
changeset
|
4248 _preserved_marks_of_objs.clear(true); |
| 342 | 4249 } |
| 4250 | |
| 4251 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4252 _evac_failure_scan_stack->push(obj); | |
| 4253 } | |
| 4254 | |
| 4255 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4256 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4257 | |
| 4258 while (_evac_failure_scan_stack->length() > 0) { | |
| 4259 oop obj = _evac_failure_scan_stack->pop(); | |
| 4260 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4261 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4262 } | |
| 4263 } | |
| 4264 | |
| 4265 oop | |
| 4266 G1CollectedHeap::handle_evacuation_failure_par(OopsInHeapRegionClosure* cl, | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4267 oop old) { |
|
3323
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
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3317
diff
changeset
|
4268 assert(obj_in_cs(old), |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
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3317
diff
changeset
|
4269 err_msg("obj: "PTR_FORMAT" should still be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
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3317
diff
changeset
|
4270 (HeapWord*) old)); |
| 342 | 4271 markOop m = old->mark(); |
| 4272 oop forward_ptr = old->forward_to_atomic(old); | |
| 4273 if (forward_ptr == NULL) { | |
| 4274 // 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
|
4275 |
| 342 | 4276 if (_evac_failure_closure != cl) { |
| 4277 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4278 assert(!_drain_in_progress, | |
| 4279 "Should only be true while someone holds the lock."); | |
| 4280 // Set the global evac-failure closure to the current thread's. | |
| 4281 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4282 set_evac_failure_closure(cl); | |
| 4283 // Now do the common part. | |
| 4284 handle_evacuation_failure_common(old, m); | |
| 4285 // Reset to NULL. | |
| 4286 set_evac_failure_closure(NULL); | |
| 4287 } else { | |
| 4288 // The lock is already held, and this is recursive. | |
| 4289 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4290 handle_evacuation_failure_common(old, m); | |
| 4291 } | |
| 4292 return old; | |
| 4293 } else { | |
|
3323
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
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3317
diff
changeset
|
4294 // 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
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3317
diff
changeset
|
4295 // 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
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3317
diff
changeset
|
4296 // 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
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3317
diff
changeset
|
4297 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
|
4298 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
|
4299 "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
|
4300 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4301 return forward_ptr; |
| 4302 } | |
| 4303 } | |
| 4304 | |
| 4305 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4306 set_evacuation_failed(true); | |
| 4307 | |
| 4308 preserve_mark_if_necessary(old, m); | |
| 4309 | |
| 4310 HeapRegion* r = heap_region_containing(old); | |
| 4311 if (!r->evacuation_failed()) { | |
| 4312 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4313 _hr_printer.evac_failure(r); |
| 342 | 4314 } |
| 4315 | |
| 4316 push_on_evac_failure_scan_stack(old); | |
| 4317 | |
| 4318 if (!_drain_in_progress) { | |
| 4319 // prevent recursion in copy_to_survivor_space() | |
| 4320 _drain_in_progress = true; | |
| 4321 drain_evac_failure_scan_stack(); | |
| 4322 _drain_in_progress = false; | |
| 4323 } | |
| 4324 } | |
| 4325 | |
| 4326 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
|
4327 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4328 // 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
|
4329 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4330 if (m->must_be_preserved_for_promotion_failure(obj)) { |
|
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4331 _objs_with_preserved_marks.push(obj); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4332 _preserved_marks_of_objs.push(m); |
| 342 | 4333 } |
| 4334 } | |
| 4335 | |
| 4336 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4337 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4338 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4339 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
|
4340 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4341 return result; |
| 342 | 4342 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4343 // 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
|
4344 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4345 return old_attempt_allocation(word_size); |
| 342 | 4346 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4347 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4348 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4349 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
|
4350 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4351 return result; |
| 342 | 4352 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4353 // 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
|
4354 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4355 return survivor_attempt_allocation(word_size); |
| 342 | 4356 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4357 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4358 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4359 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4360 // 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
|
4361 return NULL; |
| 342 | 4362 } |
| 4363 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4364 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
|
4365 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4366 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4367 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num) |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4368 : _g1h(g1h), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4369 _refs(g1h->task_queue(queue_num)), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4370 _dcq(&g1h->dirty_card_queue_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4371 _ct_bs((CardTableModRefBS*)_g1h->barrier_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4372 _g1_rem(g1h->g1_rem_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4373 _hash_seed(17), _queue_num(queue_num), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4374 _term_attempts(0), |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4375 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4376 _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
|
4377 _age_table(false), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4378 _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
|
4379 _alloc_buffer_waste(0), _undo_waste(0) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4380 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4381 // 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
|
4382 // non-young regions (where the age is -1) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4383 // 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
|
4384 // an attempt to eliminate cache contention |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4385 uint real_length = 1 + _g1h->g1_policy()->young_cset_region_length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4386 uint array_length = PADDING_ELEM_NUM + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4387 real_length + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4388 PADDING_ELEM_NUM; |
| 6197 | 4389 _surviving_young_words_base = NEW_C_HEAP_ARRAY(size_t, array_length, mtGC); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4390 if (_surviving_young_words_base == NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4391 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
|
4392 "Not enough space for young surv histo."); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4393 _surviving_young_words = _surviving_young_words_base + PADDING_ELEM_NUM; |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4394 memset(_surviving_young_words, 0, (size_t) real_length * sizeof(size_t)); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4395 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4396 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4397 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4398 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4399 _start = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4400 } |
| 342 | 4401 |
| 1709 | 4402 void |
| 4403 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
| 4404 { | |
| 4405 st->print_raw_cr("GC Termination Stats"); | |
| 4406 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
| 4407 " ------waste (KiB)------"); | |
| 4408 st->print_raw_cr("thr ms ms % ms % attempts" | |
| 4409 " total alloc undo"); | |
| 4410 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
| 4411 " ------- ------- -------"); | |
| 4412 } | |
| 4413 | |
| 4414 void | |
| 4415 G1ParScanThreadState::print_termination_stats(int i, | |
| 4416 outputStream* const st) const | |
| 4417 { | |
| 4418 const double elapsed_ms = elapsed_time() * 1000.0; | |
| 4419 const double s_roots_ms = strong_roots_time() * 1000.0; | |
| 4420 const double term_ms = term_time() * 1000.0; | |
| 4421 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
| 4422 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
| 4423 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
| 4424 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
| 4425 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
| 4426 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
| 4427 alloc_buffer_waste() * HeapWordSize / K, | |
| 4428 undo_waste() * HeapWordSize / K); | |
| 4429 } | |
| 4430 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4431 #ifdef ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4432 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4433 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4434 assert(UseCompressedOops, "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4435 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4436 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4437 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4438 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4439 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4440 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4441 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4442 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4443 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4444 if (has_partial_array_mask(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4445 // Must be in the collection set--it's already been copied. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4446 oop p = clear_partial_array_mask(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4447 assert(_g1h->obj_in_cs(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4448 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4449 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4450 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4451 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4452 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4453 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4454 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4455 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4456 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4457 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4458 if (ref.is_narrow()) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4459 return verify_ref((narrowOop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4460 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4461 return verify_ref((oop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4462 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4463 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4464 #endif // ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4465 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4466 void G1ParScanThreadState::trim_queue() { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4467 assert(_evac_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4468 assert(_evac_failure_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4469 assert(_partial_scan_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4470 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4471 StarTask ref; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4472 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4473 // Drain the overflow stack first, so other threads can steal. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4474 while (refs()->pop_overflow(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4475 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4476 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4477 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4478 while (refs()->pop_local(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4479 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4480 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4481 } while (!refs()->is_empty()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4482 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4483 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4484 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4485 G1ParScanThreadState* par_scan_state) : |
| 342 | 4486 _g1(g1), _g1_rem(_g1->g1_rem_set()), _cm(_g1->concurrent_mark()), |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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parents:
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diff
changeset
|
4487 _par_scan_state(par_scan_state), |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4488 _worker_id(par_scan_state->queue_num()), |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4489 _during_initial_mark(_g1->g1_policy()->during_initial_mark_pause()), |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
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diff
changeset
|
4490 _mark_in_progress(_g1->mark_in_progress()) { } |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
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diff
changeset
|
4491 |
| 5987 | 4492 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4493 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object>::mark_object(oop obj) { | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4494 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4495 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4496 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4497 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
|
4498 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4499 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4500 // 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:
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diff
changeset
|
4501 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
4502 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
4503 |
| 5987 | 4504 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4505 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> | |
| 4506 ::mark_forwarded_object(oop from_obj, oop to_obj) { | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4507 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4508 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
|
4509 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
|
4510 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
|
4511 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4512 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
|
4513 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4514 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
|
4515 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4516 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
|
4517 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4518 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
|
4519 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4520 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4521 // 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
|
4522 // 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
|
4523 // 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
|
4524 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4525 _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
|
4526 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4527 |
| 5987 | 4528 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4529 oop G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> | |
| 4530 ::copy_to_survivor_space(oop old) { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4531 size_t word_sz = old->size(); |
| 342 | 4532 HeapRegion* from_region = _g1->heap_region_containing_raw(old); |
| 4533 // +1 to make the -1 indexes valid... | |
| 4534 int young_index = from_region->young_index_in_cset()+1; | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4535 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
|
4536 (!from_region->is_young() && young_index == 0), "invariant" ); |
| 342 | 4537 G1CollectorPolicy* g1p = _g1->g1_policy(); |
| 4538 markOop m = old->mark(); | |
| 545 | 4539 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
| 4540 : m->age(); | |
| 4541 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
| 342 | 4542 word_sz); |
| 4543 HeapWord* obj_ptr = _par_scan_state->allocate(alloc_purpose, word_sz); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4544 #ifndef PRODUCT |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4545 // Should this evacuation fail? |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4546 if (_g1->evacuation_should_fail()) { |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4547 if (obj_ptr != NULL) { |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4548 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4549 obj_ptr = NULL; |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4550 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4551 } |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4552 #endif // !PRODUCT |
| 342 | 4553 |
| 4554 if (obj_ptr == NULL) { | |
| 4555 // This will either forward-to-self, or detect that someone else has | |
| 4556 // installed a forwarding pointer. | |
| 4557 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4558 return _g1->handle_evacuation_failure_par(cl, old); |
| 342 | 4559 } |
| 4560 | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4561 oop obj = oop(obj_ptr); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4562 |
| 526 | 4563 // We're going to allocate linearly, so might as well prefetch ahead. |
| 4564 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
| 4565 | |
| 342 | 4566 oop forward_ptr = old->forward_to_atomic(obj); |
| 4567 if (forward_ptr == NULL) { | |
| 4568 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
| 526 | 4569 if (g1p->track_object_age(alloc_purpose)) { |
| 4570 // We could simply do obj->incr_age(). However, this causes a | |
| 4571 // performance issue. obj->incr_age() will first check whether | |
| 4572 // the object has a displaced mark by checking its mark word; | |
| 4573 // getting the mark word from the new location of the object | |
| 4574 // stalls. So, given that we already have the mark word and we | |
| 4575 // are about to install it anyway, it's better to increase the | |
| 4576 // age on the mark word, when the object does not have a | |
| 4577 // displaced mark word. We're not expecting many objects to have | |
| 4578 // a displaced marked word, so that case is not optimized | |
| 4579 // further (it could be...) and we simply call obj->incr_age(). | |
| 4580 | |
| 4581 if (m->has_displaced_mark_helper()) { | |
| 4582 // in this case, we have to install the mark word first, | |
| 4583 // otherwise obj looks to be forwarded (the old mark word, | |
| 4584 // which contains the forward pointer, was copied) | |
| 4585 obj->set_mark(m); | |
| 4586 obj->incr_age(); | |
| 4587 } else { | |
| 4588 m = m->incr_age(); | |
| 545 | 4589 obj->set_mark(m); |
| 526 | 4590 } |
| 545 | 4591 _par_scan_state->age_table()->add(obj, word_sz); |
| 4592 } else { | |
| 4593 obj->set_mark(m); | |
| 526 | 4594 } |
| 4595 | |
| 342 | 4596 size_t* surv_young_words = _par_scan_state->surviving_young_words(); |
| 4597 surv_young_words[young_index] += word_sz; | |
| 4598 | |
| 4599 if (obj->is_objArray() && arrayOop(obj)->length() >= ParGCArrayScanChunk) { | |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4600 // We keep track of the next start index in the length field of |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4601 // the to-space object. The actual length can be found in the |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4602 // length field of the from-space object. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4603 arrayOop(obj)->set_length(0); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4604 oop* old_p = set_partial_array_mask(old); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4605 _par_scan_state->push_on_queue(old_p); |
| 342 | 4606 } else { |
| 526 | 4607 // No point in using the slower heap_region_containing() method, |
| 4608 // given that we know obj is in the heap. | |
| 5987 | 4609 _scanner.set_region(_g1->heap_region_containing_raw(obj)); |
| 4610 obj->oop_iterate_backwards(&_scanner); | |
| 342 | 4611 } |
| 4612 } else { | |
| 4613 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); | |
| 4614 obj = forward_ptr; | |
| 4615 } | |
| 4616 return obj; | |
| 4617 } | |
| 4618 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4619 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4620 void G1ParCopyHelper::do_klass_barrier(T* p, oop new_obj) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4621 if (_g1->heap_region_containing_raw(new_obj)->is_young()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4622 _scanned_klass->record_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4623 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4624 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4625 |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4626 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4627 template <class T> |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4628 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4629 ::do_oop_work(T* p) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4630 oop obj = oopDesc::load_decode_heap_oop(p); |
| 342 | 4631 assert(barrier != G1BarrierRS || obj != NULL, |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4632 "Precondition: G1BarrierRS implies obj is non-NULL"); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4633 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4634 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4635 |
| 526 | 4636 // here the null check is implicit in the cset_fast_test() test |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4637 if (_g1->in_cset_fast_test(obj)) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4638 oop forwardee; |
| 526 | 4639 if (obj->is_forwarded()) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4640 forwardee = obj->forwardee(); |
| 526 | 4641 } else { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4642 forwardee = copy_to_survivor_space(obj); |
| 342 | 4643 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4644 assert(forwardee != NULL, "forwardee should not be NULL"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4645 oopDesc::encode_store_heap_oop(p, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4646 if (do_mark_object && forwardee != obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4647 // If the object is self-forwarded we don't need to explicitly |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4648 // mark it, the evacuation failure protocol will do so. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4649 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4650 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4651 |
| 526 | 4652 // When scanning the RS, we only care about objs in CS. |
| 4653 if (barrier == G1BarrierRS) { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4654 _par_scan_state->update_rs(_from, p, _worker_id); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4655 } else if (barrier == G1BarrierKlass) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4656 do_klass_barrier(p, forwardee); |
| 342 | 4657 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4658 } else { |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4659 // The object is not in collection set. If we're a root scanning |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4660 // closure during an initial mark pause (i.e. do_mark_object will |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4661 // be true) then attempt to mark the object. |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4662 if (do_mark_object && _g1->is_in_g1_reserved(obj)) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4663 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4664 } |
| 526 | 4665 } |
| 4666 | |
| 4667 if (barrier == G1BarrierEvac && obj != NULL) { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4668 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4669 } |
| 4670 | |
| 4671 if (do_gen_barrier && obj != NULL) { | |
| 4672 par_do_barrier(p); | |
| 4673 } | |
| 4674 } | |
| 4675 | |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4676 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(oop* p); |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4677 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4678 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4679 template <class T> void G1ParScanPartialArrayClosure::do_oop_nv(T* p) { |
| 526 | 4680 assert(has_partial_array_mask(p), "invariant"); |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4681 oop from_obj = clear_partial_array_mask(p); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4682 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4683 assert(Universe::heap()->is_in_reserved(from_obj), "must be in heap."); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4684 assert(from_obj->is_objArray(), "must be obj array"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4685 objArrayOop from_obj_array = objArrayOop(from_obj); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4686 // The from-space object contains the real length. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4687 int length = from_obj_array->length(); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4688 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4689 assert(from_obj->is_forwarded(), "must be forwarded"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4690 oop to_obj = from_obj->forwardee(); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4691 assert(from_obj != to_obj, "should not be chunking self-forwarded objects"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4692 objArrayOop to_obj_array = objArrayOop(to_obj); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4693 // 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
|
4694 // to-space object. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4695 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
|
4696 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
|
4697 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
|
4698 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4699 int start = next_index; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4700 int end = length; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4701 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
|
4702 // We'll try not to push a range that's smaller than ParGCArrayScanChunk. |
| 342 | 4703 if (remainder > 2 * ParGCArrayScanChunk) { |
| 4704 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
|
4705 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
|
4706 // Push the remainder before we process the range in case another |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4707 // 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
|
4708 oop* from_obj_p = set_partial_array_mask(from_obj); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4709 _par_scan_state->push_on_queue(from_obj_p); |
| 342 | 4710 } else { |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4711 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
|
4712 // 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
|
4713 // 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
|
4714 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
|
4715 } |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4716 _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
|
4717 // 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
|
4718 // 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
|
4719 // Note that at this point the length field of to_obj_array is not |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4720 // 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
|
4721 // 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
|
4722 // 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
|
4723 // 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
|
4724 // 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
|
4725 to_obj_array->oop_iterate_range(&_scanner, start, end); |
| 342 | 4726 } |
| 4727 | |
| 4728 class G1ParEvacuateFollowersClosure : public VoidClosure { | |
| 4729 protected: | |
| 4730 G1CollectedHeap* _g1h; | |
| 4731 G1ParScanThreadState* _par_scan_state; | |
| 4732 RefToScanQueueSet* _queues; | |
| 4733 ParallelTaskTerminator* _terminator; | |
| 4734 | |
| 4735 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4736 RefToScanQueueSet* queues() { return _queues; } | |
| 4737 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4738 | |
| 4739 public: | |
| 4740 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4741 G1ParScanThreadState* par_scan_state, | |
| 4742 RefToScanQueueSet* queues, | |
| 4743 ParallelTaskTerminator* terminator) | |
| 4744 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4745 _queues(queues), _terminator(terminator) {} | |
| 4746 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4747 void do_void(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4748 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4749 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4750 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4751 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4752 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4753 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4754 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4755 pss->start_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4756 const bool res = terminator()->offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4757 pss->end_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4758 return res; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4759 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4760 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4761 void G1ParEvacuateFollowersClosure::do_void() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4762 StarTask stolen_task; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4763 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4764 pss->trim_queue(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4765 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4766 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4767 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4768 assert(pss->verify_task(stolen_task), "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4769 if (stolen_task.is_narrow()) { |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4770 pss->deal_with_reference((narrowOop*) stolen_task); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4771 } else { |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4772 pss->deal_with_reference((oop*) stolen_task); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4773 } |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4774 |
|
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4775 // We've just processed a reference and we might have made |
|
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4776 // available new entries on the queues. So we have to make sure |
|
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4777 // we drain the queues as necessary. |
| 342 | 4778 pss->trim_queue(); |
| 4779 } | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4780 } while (!offer_termination()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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|
4781 |
|
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|
4782 pss->retire_alloc_buffers(); |
|
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|
4783 } |
| 342 | 4784 |
|
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4785 class G1KlassScanClosure : public KlassClosure { |
|
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4786 G1ParCopyHelper* _closure; |
|
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|
4787 bool _process_only_dirty; |
|
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|
4788 int _count; |
|
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|
4789 public: |
|
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|
4790 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
|
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4791 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
|
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|
4792 void do_klass(Klass* klass) { |
|
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4793 // If the klass has not been dirtied we know that there's |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
4794 // no references into the young gen and we can skip it. |
|
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|
4795 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
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|
4796 // Clean the klass since we're going to scavenge all the metadata. |
|
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|
4797 klass->clear_modified_oops(); |
|
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|
4798 |
|
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|
4799 // Tell the closure that this klass is the Klass to scavenge |
|
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|
4800 // and is the one to dirty if oops are left pointing into the young gen. |
|
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|
4801 _closure->set_scanned_klass(klass); |
|
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|
4802 |
|
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|
4803 klass->oops_do(_closure); |
|
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|
4804 |
|
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|
4805 _closure->set_scanned_klass(NULL); |
|
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|
4806 } |
|
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|
4807 _count++; |
|
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|
4808 } |
|
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|
4809 }; |
|
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|
4810 |
| 342 | 4811 class G1ParTask : public AbstractGangTask { |
| 4812 protected: | |
| 4813 G1CollectedHeap* _g1h; | |
| 4814 RefToScanQueueSet *_queues; | |
| 4815 ParallelTaskTerminator _terminator; | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
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4711
diff
changeset
|
4816 uint _n_workers; |
| 342 | 4817 |
| 4818 Mutex _stats_lock; | |
| 4819 Mutex* stats_lock() { return &_stats_lock; } | |
| 4820 | |
| 4821 size_t getNCards() { | |
| 4822 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 4823 / G1BlockOffsetSharedArray::N_bytes; | |
| 4824 } | |
| 4825 | |
| 4826 public: | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
4827 G1ParTask(G1CollectedHeap* g1h, |
|
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changeset
|
4828 RefToScanQueueSet *task_queues) |
| 342 | 4829 : AbstractGangTask("G1 collection"), |
| 4830 _g1h(g1h), | |
| 4831 _queues(task_queues), | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
changeset
|
4832 _terminator(0, _queues), |
|
bca17e38de00
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diff
changeset
|
4833 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4834 {} |
| 4835 | |
| 4836 RefToScanQueueSet* queues() { return _queues; } | |
| 4837 | |
| 4838 RefToScanQueue *work_queue(int i) { | |
| 4839 return queues()->queue(i); | |
| 4840 } | |
| 4841 | |
|
4095
bca17e38de00
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|
4842 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
bca17e38de00
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diff
changeset
|
4843 |
|
bca17e38de00
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diff
changeset
|
4844 virtual void set_for_termination(int active_workers) { |
|
bca17e38de00
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diff
changeset
|
4845 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
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|
4846 // in the young space (_par_seq_tasks) in the G1 heap |
|
bca17e38de00
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diff
changeset
|
4847 // for SequentialSubTasksDone. |
|
bca17e38de00
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diff
changeset
|
4848 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
bca17e38de00
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changeset
|
4849 // both of which need setting by set_n_termination(). |
|
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diff
changeset
|
4850 _g1h->SharedHeap::set_n_termination(active_workers); |
|
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diff
changeset
|
4851 _g1h->set_n_termination(active_workers); |
|
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changeset
|
4852 terminator()->reset_for_reuse(active_workers); |
|
bca17e38de00
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4090
diff
changeset
|
4853 _n_workers = active_workers; |
|
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4090
diff
changeset
|
4854 } |
|
bca17e38de00
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4090
diff
changeset
|
4855 |
|
4728
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7121618: Change type of number of GC workers to unsigned int.
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4711
diff
changeset
|
4856 void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4857 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 4858 |
| 4859 double start_time_ms = os::elapsedTime() * 1000.0; | |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
4860 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 4861 |
|
5986
500023bd0818
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parents:
5963
diff
changeset
|
4862 { |
|
500023bd0818
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parents:
5963
diff
changeset
|
4863 ResourceMark rm; |
|
500023bd0818
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parents:
5963
diff
changeset
|
4864 HandleMark hm; |
|
500023bd0818
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parents:
5963
diff
changeset
|
4865 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4866 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4867 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4868 G1ParScanThreadState pss(_g1h, worker_id); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4869 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, rp); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4870 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4871 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, rp); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4872 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4873 pss.set_evac_closure(&scan_evac_cl); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4874 pss.set_evac_failure_closure(&evac_failure_cl); |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
4875 pss.set_partial_scan_closure(&partial_scan_cl); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4876 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4877 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
4878 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4879 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4880 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
4881 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
4882 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
4883 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
4884 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4885 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4886 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4887 OopClosure* scan_root_cl = &only_scan_root_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
4888 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4889 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4890 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4891 // We also need to mark copied objects. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4892 scan_root_cl = &scan_mark_root_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4893 scan_klasses_cl = &scan_mark_klasses_cl_s; |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4894 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4895 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4896 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4897 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4898 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings | SharedHeap::SO_CodeCache; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
4899 |
|
5986
500023bd0818
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5963
diff
changeset
|
4900 pss.start_strong_roots(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4901 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
4902 SharedHeap::ScanningOption(so), |
|
5986
500023bd0818
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parents:
5963
diff
changeset
|
4903 scan_root_cl, |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
4904 &push_heap_rs_cl, |
|
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
4905 scan_klasses_cl, |
|
5986
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parents:
5963
diff
changeset
|
4906 worker_id); |
|
500023bd0818
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5963
diff
changeset
|
4907 pss.end_strong_roots(); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4908 |
|
500023bd0818
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5963
diff
changeset
|
4909 { |
|
500023bd0818
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parents:
5963
diff
changeset
|
4910 double start = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4911 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
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5963
diff
changeset
|
4912 evac.do_void(); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4913 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
|
500023bd0818
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parents:
5963
diff
changeset
|
4914 double term_ms = pss.term_time()*1000.0; |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4915 _g1h->g1_policy()->phase_times()->add_obj_copy_time(worker_id, elapsed_ms-term_ms); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4916 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
|
5986
500023bd0818
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parents:
5963
diff
changeset
|
4917 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4918 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4919 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4920 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4921 if (ParallelGCVerbose) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4922 MutexLocker x(stats_lock()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4923 pss.print_termination_stats(worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4924 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4925 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4926 assert(pss.refs()->is_empty(), "should be empty"); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4927 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4928 // Close the inner scope so that the ResourceMark and HandleMark |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4929 // destructors are executed here and are included as part of the |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4930 // "GC Worker Time". |
| 342 | 4931 } |
| 4932 | |
| 1611 | 4933 double end_time_ms = os::elapsedTime() * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4934 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 4935 } |
| 4936 }; | |
| 4937 | |
| 4938 // *** Common G1 Evacuation Stuff | |
| 4939 | |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4940 // Closures that support the filtering of CodeBlobs scanned during |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4941 // external root scanning. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4942 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4943 // Closure applied to reference fields in code blobs (specifically nmethods) |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4944 // to determine whether an nmethod contains references that point into |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4945 // the collection set. Used as a predicate when walking code roots so |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4946 // that only nmethods that point into the collection set are added to the |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4947 // 'marked' list. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4948 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4949 class G1FilteredCodeBlobToOopClosure : public CodeBlobToOopClosure { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4950 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4951 class G1PointsIntoCSOopClosure : public OopClosure { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4952 G1CollectedHeap* _g1; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4953 bool _points_into_cs; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4954 public: |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4955 G1PointsIntoCSOopClosure(G1CollectedHeap* g1) : |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4956 _g1(g1), _points_into_cs(false) { } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4957 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4958 bool points_into_cs() const { return _points_into_cs; } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4959 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4960 template <class T> |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4961 void do_oop_nv(T* p) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4962 if (!_points_into_cs) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4963 T heap_oop = oopDesc::load_heap_oop(p); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4964 if (!oopDesc::is_null(heap_oop) && |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4965 _g1->in_cset_fast_test(oopDesc::decode_heap_oop_not_null(heap_oop))) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4966 _points_into_cs = true; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4967 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4968 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4969 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4970 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4971 virtual void do_oop(oop* p) { do_oop_nv(p); } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4972 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4973 }; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4974 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4975 G1CollectedHeap* _g1; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4976 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4977 public: |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4978 G1FilteredCodeBlobToOopClosure(G1CollectedHeap* g1, OopClosure* cl) : |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4979 CodeBlobToOopClosure(cl, true), _g1(g1) { } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4980 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4981 virtual void do_code_blob(CodeBlob* cb) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4982 nmethod* nm = cb->as_nmethod_or_null(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4983 if (nm != NULL && !(nm->test_oops_do_mark())) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4984 G1PointsIntoCSOopClosure predicate_cl(_g1); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4985 nm->oops_do(&predicate_cl); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4986 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4987 if (predicate_cl.points_into_cs()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4988 // At least one of the reference fields or the oop relocations |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4989 // in the nmethod points into the collection set. We have to |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4990 // 'mark' this nmethod. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4991 // Note: Revisit the following if CodeBlobToOopClosure::do_code_blob() |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4992 // or MarkingCodeBlobClosure::do_code_blob() change. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4993 if (!nm->test_set_oops_do_mark()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4994 do_newly_marked_nmethod(nm); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4995 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4996 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4997 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4998 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4999 }; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5000 |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5001 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5002 |
| 342 | 5003 void |
| 5004 G1CollectedHeap:: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5005 g1_process_strong_roots(bool is_scavenging, |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
5006 ScanningOption so, |
| 342 | 5007 OopClosure* scan_non_heap_roots, |
| 5008 OopsInHeapRegionClosure* scan_rs, | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5009 G1KlassScanClosure* scan_klasses, |
| 342 | 5010 int worker_i) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5011 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5012 // First scan the strong roots |
| 342 | 5013 double ext_roots_start = os::elapsedTime(); |
| 5014 double closure_app_time_sec = 0.0; | |
| 5015 | |
| 5016 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
| 5017 | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5018 // Walk the code cache w/o buffering, because StarTask cannot handle |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5019 // unaligned oop locations. |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5020 G1FilteredCodeBlobToOopClosure eager_scan_code_roots(this, scan_non_heap_roots); |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5021 |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5022 process_strong_roots(false, // no scoping; this is parallel code |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5023 is_scavenging, so, |
| 342 | 5024 &buf_scan_non_heap_roots, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5025 &eager_scan_code_roots, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5026 scan_klasses |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5027 ); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5028 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5029 // Now the CM ref_processor roots. |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5030 if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5031 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5032 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5033 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5034 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5035 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5036 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5037 |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5038 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 5039 buf_scan_non_heap_roots.done(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5040 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5041 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5042 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5043 g1_policy()->phase_times()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5044 |
| 342 | 5045 double ext_root_time_ms = |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5046 ((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5047 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5048 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 5049 |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
5050 // 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
|
5051 // 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
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4785
diff
changeset
|
5052 // as implicitly live). |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
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diff
changeset
|
5053 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
5054 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
5055 if (mark_in_progress()) { |
|
6628
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7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
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6611
diff
changeset
|
5056 double satb_filter_start = os::elapsedTime(); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
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diff
changeset
|
5057 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5058 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
|
6628
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7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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diff
changeset
|
5059 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
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diff
changeset
|
5060 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
|
4787
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4785
diff
changeset
|
5061 } |
|
2ace1c4ee8da
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4785
diff
changeset
|
5062 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
5063 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 5064 |
| 5065 // Now scan the complement of the collection set. | |
| 5066 if (scan_rs != NULL) { | |
| 5067 g1_rem_set()->oops_into_collection_set_do(scan_rs, worker_i); | |
| 5068 } | |
| 5069 _process_strong_tasks->all_tasks_completed(); | |
| 5070 } | |
| 5071 | |
| 5072 void | |
| 5073 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure, | |
| 5074 OopClosure* non_root_closure) { | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5075 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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diff
changeset
|
5076 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs, non_root_closure); |
| 342 | 5077 } |
| 5078 | |
|
3979
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changeset
|
5079 // Weak Reference Processing support |
|
4dfb2df418f2
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changeset
|
5080 |
|
4dfb2df418f2
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changeset
|
5081 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
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changeset
|
5082 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
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changeset
|
5083 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
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diff
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|
5084 // discovered by the CM ref processor. |
|
4dfb2df418f2
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changeset
|
5085 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
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changeset
|
5086 G1CollectedHeap* _g1; |
|
4dfb2df418f2
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johnc
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changeset
|
5087 public: |
|
4dfb2df418f2
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diff
changeset
|
5088 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5089 void do_object(oop p) { assert(false, "Do not call."); } |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5090 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5091 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5092 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5093 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5094 return false; |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5095 } |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5096 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5097 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5098 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5099 // 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
|
5100 // or is inside and copied. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5101 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5102 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5103 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5104 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5105 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5106 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5107 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5108 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5109 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5110 void do_oop( oop* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5111 oop obj = *p; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5112 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5113 if (_g1->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5114 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5115 *p = obj->forwardee(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5116 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5117 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5118 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5119 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5120 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5121 // serial and parallel code as long as different worker |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5122 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5123 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5124 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5125 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5126 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5127 OopClosure* _copy_non_heap_obj_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5128 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5129 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5130 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5131 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5132 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5133 OopClosure* non_heap_obj_cl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5134 OopsInHeapRegionClosure* metadata_obj_cl, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5135 G1ParScanThreadState* pss): |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5136 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5137 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5138 _copy_metadata_obj_cl(metadata_obj_cl), |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5139 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5140 {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5141 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5142 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5143 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5144 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5145 template <class T> void do_oop_work(T* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5146 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5147 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5148 if (_g1h->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5149 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5150 // 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
|
5151 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5152 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5153 // heap, update the RSet for the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5154 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5155 // 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
|
5156 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5157 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5158 // 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
|
5159 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5160 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5161 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5162 // new location, and the RSet updated. Otherwise we need to |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5163 // use the the non-heap or metadata closures directly to copy |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5164 // the refernt object and update the pointer, while avoiding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5165 // updating the RSet. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5166 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5167 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5168 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5169 } else { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5170 assert(!ClassLoaderDataGraph::contains((address)p), |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5171 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5172 PTR_FORMAT, p)); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5173 _copy_non_heap_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5174 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5175 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5176 } |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5177 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5178 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5179 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5180 // closure for each discovered list in some of the |
|
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|
5181 // reference processing phases. |
|
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changeset
|
5182 |
|
4dfb2df418f2
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changeset
|
5183 class G1STWDrainQueueClosure: public VoidClosure { |
|
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|
5184 protected: |
|
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|
5185 G1CollectedHeap* _g1h; |
|
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|
5186 G1ParScanThreadState* _par_scan_state; |
|
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|
5187 |
|
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|
5188 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
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changeset
|
5189 |
|
4dfb2df418f2
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diff
changeset
|
5190 public: |
|
4dfb2df418f2
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parents:
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diff
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|
5191 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
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|
5192 _g1h(g1h), |
|
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changeset
|
5193 _par_scan_state(pss) |
|
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|
5194 { } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5195 |
|
4dfb2df418f2
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changeset
|
5196 void do_void() { |
|
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|
5197 G1ParScanThreadState* const pss = par_scan_state(); |
|
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|
5198 pss->trim_queue(); |
|
4dfb2df418f2
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diff
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|
5199 } |
|
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|
5200 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5201 |
|
4dfb2df418f2
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changeset
|
5202 // Parallel Reference Processing closures |
|
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parents:
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changeset
|
5203 |
|
4dfb2df418f2
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changeset
|
5204 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
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parents:
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|
5205 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5206 |
|
4dfb2df418f2
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|
5207 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
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|
5208 private: |
|
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parents:
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|
5209 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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|
5210 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
5211 FlexibleWorkGang* _workers; |
|
3979
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|
5212 int _active_workers; |
|
4dfb2df418f2
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parents:
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|
5213 |
|
4dfb2df418f2
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parents:
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|
5214 public: |
|
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|
5215 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
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|
5216 FlexibleWorkGang* workers, |
|
3979
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|
5217 RefToScanQueueSet *task_queues, |
|
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|
5218 int n_workers) : |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5219 _g1h(g1h), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5220 _queues(task_queues), |
|
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parents:
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changeset
|
5221 _workers(workers), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5222 _active_workers(n_workers) |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5223 { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5224 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
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parents:
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|
5225 } |
|
4dfb2df418f2
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parents:
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changeset
|
5226 |
|
4dfb2df418f2
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parents:
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|
5227 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
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diff
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|
5228 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
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parents:
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changeset
|
5229 virtual void execute(EnqueueTask& task); |
|
4dfb2df418f2
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parents:
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|
5230 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5231 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5232 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5233 |
|
4dfb2df418f2
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parents:
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diff
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|
5234 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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|
5235 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
4dfb2df418f2
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parents:
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diff
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|
5236 ProcessTask& _proc_task; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5237 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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|
5238 RefToScanQueueSet *_task_queues; |
|
4dfb2df418f2
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parents:
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diff
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|
5239 ParallelTaskTerminator* _terminator; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5240 |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5241 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5242 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
4dfb2df418f2
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changeset
|
5243 G1CollectedHeap* g1h, |
|
4dfb2df418f2
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diff
changeset
|
5244 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
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parents:
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diff
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|
5245 ParallelTaskTerminator* terminator) : |
|
4dfb2df418f2
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parents:
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diff
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|
5246 AbstractGangTask("Process reference objects in parallel"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5247 _proc_task(proc_task), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5248 _g1h(g1h), |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5249 _task_queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5250 _terminator(terminator) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5251 {} |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5252 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5253 virtual void work(uint worker_id) { |
|
3979
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johnc
parents:
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diff
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|
5254 // The reference processing task executed by a single worker. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5255 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5256 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5257 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5258 G1STWIsAliveClosure is_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5259 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5260 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5261 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5262 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5263 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5264 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5265 |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5266 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5267 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5268 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5269 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5270 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5271 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5272 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5273 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5274 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5275 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5276 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5277 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5278 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5279 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5280 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5281 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5282 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5283 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5284 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5285 // Keep alive closure. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5286 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5287 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5288 // Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5289 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5290 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5291 // 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
|
5292 _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
|
5293 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5294 // Note we cannot assert that the refs array is empty here as not all |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5295 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5296 // 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
|
5297 // the queue may not be empty. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5298 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5299 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5300 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5301 // Driver routine for parallel reference processing. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5302 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5303 // task and has the worker threads execute it. |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5304 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5305 assert(_workers != NULL, "Need parallel worker threads."); |
|
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changeset
|
5306 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5307 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
4dfb2df418f2
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parents:
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|
5308 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
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parents:
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changeset
|
5309 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5310 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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changeset
|
5311 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
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parents:
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changeset
|
5312 _g1h->set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5313 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5314 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5315 // Gang task for parallel reference enqueueing. |
|
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parents:
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changeset
|
5316 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5317 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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|
5318 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
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|
5319 EnqueueTask& _enq_task; |
|
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parents:
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changeset
|
5320 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5321 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5322 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
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parents:
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changeset
|
5323 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
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parents:
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|
5324 _enq_task(enq_task) |
|
4dfb2df418f2
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parents:
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|
5325 { } |
|
4dfb2df418f2
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parents:
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|
5326 |
|
4728
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jmasa
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|
5327 virtual void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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|
5328 _enq_task.work(worker_id); |
|
3979
4dfb2df418f2
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parents:
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|
5329 } |
|
4dfb2df418f2
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parents:
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|
5330 }; |
|
4dfb2df418f2
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parents:
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changeset
|
5331 |
|
4dfb2df418f2
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parents:
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changeset
|
5332 // Driver routine for parallel reference enqueing. |
|
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|
5333 // Creates an instance of the ref enqueueing gang |
|
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parents:
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|
5334 // task and has the worker threads execute it. |
|
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parents:
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changeset
|
5335 |
|
4dfb2df418f2
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parents:
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changeset
|
5336 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
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|
5337 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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parents:
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changeset
|
5338 |
|
4dfb2df418f2
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parents:
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changeset
|
5339 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
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parents:
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changeset
|
5340 |
|
4dfb2df418f2
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parents:
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changeset
|
5341 _g1h->set_par_threads(_active_workers); |
|
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parents:
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|
5342 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
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parents:
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changeset
|
5343 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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parents:
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|
5344 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5345 |
|
4dfb2df418f2
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parents:
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changeset
|
5346 // End of weak reference support closures |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5347 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5348 // Abstract task used to preserve (i.e. copy) any referent objects |
|
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|
5349 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
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parents:
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diff
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|
5350 // objects discovered by the CM ref processor. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5351 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5352 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5353 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5354 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5355 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5356 ParallelTaskTerminator _terminator; |
|
4728
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jmasa
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|
5357 uint _n_workers; |
|
3979
4dfb2df418f2
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parents:
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changeset
|
5358 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5359 public: |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5360 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5361 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5362 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5363 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5364 _terminator(workers, _queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5365 _n_workers(workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5366 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5367 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5368 void work(uint worker_id) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5369 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5372 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5373 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5374 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5375 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5377 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5378 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5379 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5380 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5381 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
|
5382 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5383 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5385 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5386 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5387 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5388 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5391 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5394 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5396 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5399 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5400 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5402 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5403 // to be copied. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5404 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5405 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5406 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5407 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5408 uint limit = ReferenceProcessor::number_of_subclasses_of_ref() * rp->max_num_q(); |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5409 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5410 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5411 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5412 // So this must be true - but assert just in case someone decides to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5413 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5414 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5415 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5416 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5417 // Select discovered lists [i, i+stride, i+2*stride,...,limit) |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5418 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5419 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5420 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5421 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5422 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5424 // can see some null referent objects. |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5425 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5426 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5427 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5428 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5429 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5430 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5431 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5432 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5433 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5434 } |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5435 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5436 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5437 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5438 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5439 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5440 assert(pss.refs()->is_empty(), "should be"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5441 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5442 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5443 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5444 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5445 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5446 double ref_proc_start = os::elapsedTime(); |
|
4dfb2df418f2
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diff
changeset
|
5447 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5448 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5449 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5450 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5451 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5452 // by the CM ref processor should have already been copied (either by |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5453 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5454 // by following an RSet entry). |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5455 // |
|
4dfb2df418f2
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diff
changeset
|
5456 // But some of the referents, that are in the collection set, that these |
|
4dfb2df418f2
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diff
changeset
|
5457 // reference objects point to may not have been copied: the STW ref |
|
4dfb2df418f2
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diff
changeset
|
5458 // processor would have seen that the reference object had already |
|
4dfb2df418f2
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diff
changeset
|
5459 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
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diff
changeset
|
5460 // but would not have treated the reference object as a regular oop. |
|
4dfb2df418f2
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diff
changeset
|
5461 // As a reult the copy closure would not have been applied to the |
|
4dfb2df418f2
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diff
changeset
|
5462 // referent object. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5463 // |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5464 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
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diff
changeset
|
5465 // will be processed at the end of remarking. |
|
4dfb2df418f2
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|
5466 // |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5467 // We also need to do this copying before we process the reference |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5468 // objects discovered by the STW ref processor in case one of these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5469 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5470 // object discovered by the STW ref processor. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5471 |
| 4711 | 5472 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5473 no_of_gc_workers == workers()->active_workers(), |
| 5474 "Need to reset active GC workers"); | |
| 5475 | |
| 5476 set_par_threads(no_of_gc_workers); | |
| 5477 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5478 no_of_gc_workers, | |
| 5479 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5480 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5481 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5482 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5483 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5484 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5485 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5486 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5487 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5488 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5489 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5490 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5491 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5492 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5493 // 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
|
5494 // 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
|
5495 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5496 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5497 // Use only a single queue for this PSS. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5498 G1ParScanThreadState pss(this, 0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5499 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5500 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5501 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5502 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5503 G1ParScanHeapEvacClosure scan_evac_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5504 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5505 G1ParScanPartialArrayClosure partial_scan_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5506 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5507 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5508 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5509 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5510 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5511 assert(pss.refs()->is_empty(), "pre-condition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5512 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5513 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5514 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5515 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5516 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5517 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5518 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5519 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5520 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5521 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5522 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5523 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5524 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5525 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5526 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5527 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5528 // Keep alive closure. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5529 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5530 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5531 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5532 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5533 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5534 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5535 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5536 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5537 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5538 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5539 rp->process_discovered_references(&is_alive, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5540 &keep_alive, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5541 &drain_queue, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5542 NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5543 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5544 // Parallel reference processing |
| 6819 | 5545 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5546 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5547 | |
| 5548 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5549 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
|
5550 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5551 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5552 // We have completed copying any necessary live referent objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5553 // (that were not copied during the actual pause) so we can |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5554 // retire any active alloc buffers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5555 pss.retire_alloc_buffers(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5556 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
|
5557 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5558 double ref_proc_time = os::elapsedTime() - ref_proc_start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5559 g1_policy()->phase_times()->record_ref_proc_time(ref_proc_time * 1000.0); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5560 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5561 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5562 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5563 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5564 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5565 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5566 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5567 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
|
5568 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5569 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5570 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5571 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5572 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5573 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5574 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5575 // Parallel reference enqueuing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5576 |
| 6819 | 5577 assert(no_of_gc_workers == workers()->active_workers(), |
| 5578 "Need to reset active workers"); | |
| 5579 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5580 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5581 | |
| 5582 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5583 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5584 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5585 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5586 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5587 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5588 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5589 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5590 // 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
|
5591 // 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
|
5592 // and could signicantly increase the pause time. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5593 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5594 double ref_enq_time = os::elapsedTime() - ref_enq_start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5595 g1_policy()->phase_times()->record_ref_enq_time(ref_enq_time * 1000.0); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5596 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5597 |
| 342 | 5598 void G1CollectedHeap::evacuate_collection_set() { |
|
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
5599 _expand_heap_after_alloc_failure = true; |
| 342 | 5600 set_evacuation_failed(false); |
| 5601 | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5602 // Should G1EvacuationFailureALot be in effect for this GC? |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5603 NOT_PRODUCT(set_evacuation_failure_alot_for_current_gc();) |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5604 |
| 342 | 5605 g1_rem_set()->prepare_for_oops_into_collection_set_do(); |
| 5606 concurrent_g1_refine()->set_use_cache(false); | |
| 889 | 5607 concurrent_g1_refine()->clear_hot_cache_claimed_index(); |
| 5608 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5609 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5610 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5611 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5612 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5613 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5614 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5615 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5616 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5617 "If not dynamic should be using all the workers"); |
| 4711 | 5618 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5619 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5620 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5621 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5622 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5623 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5624 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5625 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5626 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5627 |
| 5628 init_for_evac_failure(NULL); | |
| 5629 | |
| 5630 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
|
5631 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5632 assert(dirty_card_queue_set().completed_buffers_num() == 0, "Should be empty"); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5633 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5634 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5635 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5636 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5637 StrongRootsScope srs(this); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5638 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5639 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5640 // The individual threads will set their evac-failure closures. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5641 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5642 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5643 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5644 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5645 "If not dynamic should be using all the workers"); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5646 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5647 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5648 g1_par_task.set_for_termination(n_workers); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5649 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5650 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5651 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5652 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5653 // Closing the inner scope will execute the destructor |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5654 // for the StrongRootsScope object. We record the current |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5655 // elapsed time before closing the scope so that time |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5656 // taken for the SRS destructor is NOT included in the |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5657 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5658 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5659 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5660 double par_time_ms = (end_par_time_sec - start_par_time_sec) * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5661 g1_policy()->phase_times()->record_par_time(par_time_ms); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5662 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5663 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5664 (os::elapsedTime() - end_par_time_sec) * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5665 g1_policy()->phase_times()->record_code_root_fixup_time(code_root_fixup_time_ms); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5666 |
| 342 | 5667 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5668 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5669 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5671 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5672 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5673 // not copied during the pause. |
| 6819 | 5674 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5675 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5676 // Weak root processing. |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5677 // 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
|
5678 // 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
|
5679 // here too. |
| 342 | 5680 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5681 G1STWIsAliveClosure is_alive(this); |
| 342 | 5682 G1KeepAliveClosure keep_alive(this); |
| 5683 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 5684 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5685 |
| 6819 | 5686 release_gc_alloc_regions(n_workers); |
| 342 | 5687 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
|
5688 |
| 889 | 5689 concurrent_g1_refine()->clear_hot_cache(); |
| 342 | 5690 concurrent_g1_refine()->set_use_cache(true); |
| 5691 | |
| 5692 finalize_for_evac_failure(); | |
| 5693 | |
| 5694 if (evacuation_failed()) { | |
| 5695 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5696 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5697 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5698 // Note: the values are reset only when an actual |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5699 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5700 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 5701 } |
| 5702 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 // this after the card table is cleaned (and verified) as |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 // the act of enqueuing entries on to the pending list |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 // RSets. |
| 6819 | 5710 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5711 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5712 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5713 RedirtyLoggedCardTableEntryFastClosure redirty; |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5714 dirty_card_queue_set().set_closure(&redirty); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5715 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
| 1111 | 5716 |
| 5717 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); | |
| 5718 dcq.merge_bufferlists(&dirty_card_queue_set()); | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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parents:
595
diff
changeset
|
5719 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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diff
changeset
|
5720 } |
| 342 | 5721 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5722 } | |
| 5723 | |
| 2173 | 5724 void G1CollectedHeap::free_region_if_empty(HeapRegion* hr, |
| 2152 | 5725 size_t* pre_used, |
| 5726 FreeRegionList* free_list, | |
| 4072 | 5727 OldRegionSet* old_proxy_set, |
| 2152 | 5728 HumongousRegionSet* humongous_proxy_set, |
| 2173 | 5729 HRRSCleanupTask* hrrs_cleanup_task, |
| 2152 | 5730 bool par) { |
| 5731 if (hr->used() > 0 && hr->max_live_bytes() == 0 && !hr->is_young()) { | |
| 5732 if (hr->isHumongous()) { | |
| 5733 assert(hr->startsHumongous(), "we should only see starts humongous"); | |
| 5734 free_humongous_region(hr, pre_used, free_list, humongous_proxy_set, par); | |
| 5735 } else { | |
| 4072 | 5736 _old_set.remove_with_proxy(hr, old_proxy_set); |
| 2152 | 5737 free_region(hr, pre_used, free_list, par); |
| 342 | 5738 } |
| 2173 | 5739 } else { |
| 5740 hr->rem_set()->do_cleanup_work(hrrs_cleanup_task); | |
| 342 | 5741 } |
| 5742 } | |
| 5743 | |
| 2152 | 5744 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5745 size_t* pre_used, | |
| 5746 FreeRegionList* free_list, | |
| 5747 bool par) { | |
| 5748 assert(!hr->isHumongous(), "this is only for non-humongous regions"); | |
| 5749 assert(!hr->is_empty(), "the region should not be empty"); | |
| 5750 assert(free_list != NULL, "pre-condition"); | |
| 5751 | |
| 5752 *pre_used += hr->used(); | |
| 5753 hr->hr_clear(par, true /* clear_space */); | |
|
2432
455328d90876
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
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diff
changeset
|
5754 free_list->add_as_head(hr); |
| 2152 | 5755 } |
| 5756 | |
| 5757 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5758 size_t* pre_used, | |
| 5759 FreeRegionList* free_list, | |
| 5760 HumongousRegionSet* humongous_proxy_set, | |
| 5761 bool par) { | |
| 5762 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 5763 assert(free_list != NULL, "pre-condition"); | |
| 5764 assert(humongous_proxy_set != NULL, "pre-condition"); | |
| 5765 | |
| 5766 size_t hr_used = hr->used(); | |
| 5767 size_t hr_capacity = hr->capacity(); | |
| 5768 size_t hr_pre_used = 0; | |
| 5769 _humongous_set.remove_with_proxy(hr, humongous_proxy_set); | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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diff
changeset
|
5770 // We need to read this before we make the region non-humongous, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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6220
diff
changeset
|
5771 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
5772 uint last_index = hr->last_hc_index(); |
| 2152 | 5773 hr->set_notHumongous(); |
| 5774 free_region(hr, &hr_pre_used, free_list, par); | |
| 5775 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5776 uint i = hr->hrs_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
5777 while (i < last_index) { |
| 3766 | 5778 HeapRegion* curr_hr = region_at(i); |
|
6254
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diff
changeset
|
5779 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 5780 curr_hr->set_notHumongous(); |
| 5781 free_region(curr_hr, &hr_pre_used, free_list, par); | |
| 5782 i += 1; | |
| 5783 } | |
| 5784 assert(hr_pre_used == hr_used, | |
| 5785 err_msg("hr_pre_used: "SIZE_FORMAT" and hr_used: "SIZE_FORMAT" " | |
| 5786 "should be the same", hr_pre_used, hr_used)); | |
| 5787 *pre_used += hr_pre_used; | |
| 5788 } | |
| 5789 | |
| 5790 void G1CollectedHeap::update_sets_after_freeing_regions(size_t pre_used, | |
| 5791 FreeRegionList* free_list, | |
| 4072 | 5792 OldRegionSet* old_proxy_set, |
| 2152 | 5793 HumongousRegionSet* humongous_proxy_set, |
| 5794 bool par) { | |
| 5795 if (pre_used > 0) { | |
| 5796 Mutex* lock = (par) ? ParGCRareEvent_lock : NULL; | |
| 342 | 5797 MutexLockerEx x(lock, Mutex::_no_safepoint_check_flag); |
| 2152 | 5798 assert(_summary_bytes_used >= pre_used, |
| 5799 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" " | |
| 5800 "should be >= pre_used: "SIZE_FORMAT, | |
| 5801 _summary_bytes_used, pre_used)); | |
| 342 | 5802 _summary_bytes_used -= pre_used; |
| 2152 | 5803 } |
| 5804 if (free_list != NULL && !free_list->is_empty()) { | |
| 5805 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
2432
455328d90876
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
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2369
diff
changeset
|
5806 _free_list.add_as_head(free_list); |
| 2152 | 5807 } |
| 4072 | 5808 if (old_proxy_set != NULL && !old_proxy_set->is_empty()) { |
| 5809 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5810 _old_set.update_from_proxy(old_proxy_set); | |
| 5811 } | |
| 2152 | 5812 if (humongous_proxy_set != NULL && !humongous_proxy_set->is_empty()) { |
| 5813 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5814 _humongous_set.update_from_proxy(humongous_proxy_set); | |
| 342 | 5815 } |
| 5816 } | |
| 5817 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5818 class G1ParCleanupCTTask : public AbstractGangTask { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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794
diff
changeset
|
5819 CardTableModRefBS* _ct_bs; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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794
diff
changeset
|
5820 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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936
diff
changeset
|
5821 HeapRegion* volatile _su_head; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5822 public: |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5823 G1ParCleanupCTTask(CardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5824 G1CollectedHeap* g1h) : |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5825 AbstractGangTask("G1 Par Cleanup CT Task"), |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5826 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5827 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5828 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5829 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5830 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5831 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5832 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5833 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5834 |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5835 void clear_cards(HeapRegion* r) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5836 // Cards of the survivors should have already been dirtied. |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5837 if (!r->is_survivor()) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5838 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5839 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5840 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5841 }; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5842 |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5843 #ifndef PRODUCT |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5844 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5845 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5846 CardTableModRefBS* _ct_bs; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5847 public: |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5848 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, CardTableModRefBS* ct_bs) |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5849 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5850 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
|
5851 if (r->is_survivor()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5852 _g1h->verify_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5853 } else { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5854 _g1h->verify_not_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5855 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5856 return false; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5857 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5858 }; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5859 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5860 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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parents:
3293
diff
changeset
|
5861 // All of the region should be clean. |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5862 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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3293
diff
changeset
|
5863 MemRegion mr(hr->bottom(), hr->end()); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5864 ct_bs->verify_not_dirty_region(mr); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5865 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5866 |
|
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
|
5867 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5868 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5869 // dirty allocated blocks as they allocate them. The thread that |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5870 // retires each region and replaces it with a new one will do a |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5871 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5872 // not dirty that area (one less thing to have to do while holding |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5873 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5874 // is dirty. |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5875 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5876 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5877 ct_bs->verify_dirty_region(mr); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5878 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5879 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5880 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5881 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5882 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5883 verify_dirty_region(hr); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5884 } |
|
abdfc822206f
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|
5885 } |
|
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|
5886 |
|
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|
5887 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
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|
5888 verify_dirty_young_list(_young_list->first_region()); |
|
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|
5889 } |
|
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6841313: G1: dirty cards of survivor regions in parallel
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|
5890 #endif |
|
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|
5891 |
| 342 | 5892 void G1CollectedHeap::cleanUpCardTable() { |
| 5893 CardTableModRefBS* ct_bs = (CardTableModRefBS*) (barrier_set()); | |
| 5894 double start = os::elapsedTime(); | |
| 5895 | |
| 4023 | 5896 { |
| 5897 // Iterate over the dirty cards region list. | |
| 5898 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 5899 | |
| 4711 | 5900 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 5901 set_par_threads(); | |
| 4023 | 5902 workers()->run_task(&cleanup_task); |
| 5903 set_par_threads(0); | |
| 5904 } else { | |
| 5905 while (_dirty_cards_region_list) { | |
| 5906 HeapRegion* r = _dirty_cards_region_list; | |
| 5907 cleanup_task.clear_cards(r); | |
| 5908 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 5909 if (_dirty_cards_region_list == r) { | |
| 5910 // The last region. | |
| 5911 _dirty_cards_region_list = NULL; | |
| 5912 } | |
| 5913 r->set_next_dirty_cards_region(NULL); | |
|
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6819065: G1: eliminate high serial card table clearing time
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|
5914 } |
|
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|
5915 } |
| 4023 | 5916 #ifndef PRODUCT |
| 5917 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 5918 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 5919 heap_region_iterate(&cleanup_verifier); | |
| 5920 } | |
| 5921 #endif | |
|
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|
5922 } |
|
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|
5923 |
| 342 | 5924 double elapsed = os::elapsedTime() - start; |
|
6219
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|
5925 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 5926 } |
| 5927 | |
| 5928 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head) { | |
| 2152 | 5929 size_t pre_used = 0; |
| 5930 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 5931 | |
| 342 | 5932 double young_time_ms = 0.0; |
| 5933 double non_young_time_ms = 0.0; | |
| 5934 | |
|
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|
5935 // Since the collection set is a superset of the the young list, |
|
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|
5936 // all we need to do to clear the young list is clear its |
|
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|
5937 // head and length, and unlink any young regions in the code below |
|
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|
5938 _young_list->clear(); |
|
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|
5939 |
| 342 | 5940 G1CollectorPolicy* policy = g1_policy(); |
| 5941 | |
| 5942 double start_sec = os::elapsedTime(); | |
| 5943 bool non_young = true; | |
| 5944 | |
| 5945 HeapRegion* cur = cs_head; | |
| 5946 int age_bound = -1; | |
| 5947 size_t rs_lengths = 0; | |
| 5948 | |
| 5949 while (cur != NULL) { | |
| 2361 | 5950 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 5951 if (non_young) { |
| 5952 if (cur->is_young()) { | |
| 5953 double end_sec = os::elapsedTime(); | |
| 5954 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 5955 non_young_time_ms += elapsed_ms; | |
| 5956 | |
| 5957 start_sec = os::elapsedTime(); | |
| 5958 non_young = false; | |
| 5959 } | |
| 5960 } else { | |
|
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|
5961 if (!cur->is_young()) { |
|
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|
5962 double end_sec = os::elapsedTime(); |
|
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|
5963 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5964 young_time_ms += elapsed_ms; |
|
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|
5965 |
|
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|
5966 start_sec = os::elapsedTime(); |
|
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|
5967 non_young = true; |
|
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|
5968 } |
| 342 | 5969 } |
| 5970 | |
| 5971 rs_lengths += cur->rem_set()->occupied(); | |
| 5972 | |
| 5973 HeapRegion* next = cur->next_in_collection_set(); | |
| 5974 assert(cur->in_collection_set(), "bad CS"); | |
| 5975 cur->set_next_in_collection_set(NULL); | |
| 5976 cur->set_in_collection_set(false); | |
| 5977 | |
| 5978 if (cur->is_young()) { | |
| 5979 int index = cur->young_index_in_cset(); | |
|
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|
5980 assert(index != -1, "invariant"); |
|
6010
720b6a76dd9d
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|
5981 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 5982 size_t words_survived = _surviving_young_words[index]; |
| 5983 cur->record_surv_words_in_group(words_survived); | |
|
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|
5984 |
|
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|
5985 // At this point the we have 'popped' cur from the collection set |
|
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|
5986 // (linked via next_in_collection_set()) but it is still in the |
|
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|
5987 // young list (linked via next_young_region()). Clear the |
|
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|
5988 // _next_young_region field. |
|
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|
5989 cur->set_next_young_region(NULL); |
| 342 | 5990 } else { |
| 5991 int index = cur->young_index_in_cset(); | |
|
4090
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|
5992 assert(index == -1, "invariant"); |
| 342 | 5993 } |
| 5994 | |
| 5995 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 5996 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 5997 "invariant" ); | |
| 5998 | |
| 5999 if (!cur->evacuation_failed()) { | |
|
4097
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|
6000 MemRegion used_mr = cur->used_region(); |
|
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|
6001 |
| 342 | 6002 // And the region is empty. |
|
4097
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|
6003 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
| 2152 | 6004 free_region(cur, &pre_used, &local_free_list, false /* par */); |
| 342 | 6005 } else { |
| 6006 cur->uninstall_surv_rate_group(); | |
|
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|
6007 if (cur->is_young()) { |
| 342 | 6008 cur->set_young_index_in_cset(-1); |
|
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|
6009 } |
| 342 | 6010 cur->set_not_young(); |
| 6011 cur->set_evacuation_failed(false); | |
| 4072 | 6012 // The region is now considered to be old. |
| 6013 _old_set.add(cur); | |
| 342 | 6014 } |
| 6015 cur = next; | |
| 6016 } | |
| 6017 | |
| 6018 policy->record_max_rs_lengths(rs_lengths); | |
| 6019 policy->cset_regions_freed(); | |
| 6020 | |
| 6021 double end_sec = os::elapsedTime(); | |
| 6022 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
4097
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|
6023 |
|
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|
6024 if (non_young) { |
| 342 | 6025 non_young_time_ms += elapsed_ms; |
|
4097
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|
6026 } else { |
| 342 | 6027 young_time_ms += elapsed_ms; |
|
4097
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|
6028 } |
| 342 | 6029 |
| 2152 | 6030 update_sets_after_freeing_regions(pre_used, &local_free_list, |
| 4072 | 6031 NULL /* old_proxy_set */, |
| 2152 | 6032 NULL /* humongous_proxy_set */, |
| 6033 false /* par */); | |
|
6219
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7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
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|
6034 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
|
922993931b3d
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|
6035 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6036 } |
| 6037 | |
|
1394
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|
6038 // This routine is similar to the above but does not record |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6039 // any policy statistics or update free lists; we are abandoning |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6040 // the current incremental collection set in preparation of a |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6041 // full collection. After the full GC we will start to build up |
|
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|
6042 // the incremental collection set again. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6043 // This is only called when we're doing a full collection |
|
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|
6044 // and is immediately followed by the tearing down of the young list. |
|
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|
6045 |
|
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changeset
|
6046 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6047 HeapRegion* cur = cs_head; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6048 |
|
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changeset
|
6049 while (cur != NULL) { |
|
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|
6050 HeapRegion* next = cur->next_in_collection_set(); |
|
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|
6051 assert(cur->in_collection_set(), "bad CS"); |
|
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|
6052 cur->set_next_in_collection_set(NULL); |
|
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|
6053 cur->set_in_collection_set(false); |
|
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|
6054 cur->set_young_index_in_cset(-1); |
|
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|
6055 cur = next; |
|
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|
6056 } |
|
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|
6057 } |
|
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|
6058 |
| 2152 | 6059 void G1CollectedHeap::set_free_regions_coming() { |
| 6060 if (G1ConcRegionFreeingVerbose) { | |
| 6061 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6062 "setting free regions coming"); | |
| 6063 } | |
| 6064 | |
| 6065 assert(!free_regions_coming(), "pre-condition"); | |
| 6066 _free_regions_coming = true; | |
| 342 | 6067 } |
| 6068 | |
| 2152 | 6069 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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4836
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|
6070 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
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|
6071 |
| 2152 | 6072 { |
| 6073 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6074 _free_regions_coming = false; | |
| 6075 SecondaryFreeList_lock->notify_all(); | |
| 6076 } | |
| 6077 | |
| 6078 if (G1ConcRegionFreeingVerbose) { | |
| 6079 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6080 "reset free regions coming"); | |
| 342 | 6081 } |
| 6082 } | |
| 6083 | |
| 2152 | 6084 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6085 // Most of the time we won't have to wait, so let's do a quick test | |
| 6086 // first before we take the lock. | |
| 6087 if (!free_regions_coming()) { | |
| 6088 return; | |
| 6089 } | |
| 6090 | |
| 6091 if (G1ConcRegionFreeingVerbose) { | |
| 6092 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6093 "waiting for free regions"); | |
| 342 | 6094 } |
| 6095 | |
| 6096 { | |
| 2152 | 6097 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6098 while (free_regions_coming()) { | |
| 6099 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6100 } |
| 2152 | 6101 } |
| 6102 | |
| 6103 if (G1ConcRegionFreeingVerbose) { | |
| 6104 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6105 "done waiting for free regions"); | |
| 6106 } | |
| 342 | 6107 } |
| 6108 | |
| 6109 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6110 assert(heap_lock_held_for_gc(), | |
| 6111 "the heap lock should already be held by or for this thread"); | |
| 6112 _young_list->push_region(hr); | |
| 6113 } | |
| 6114 | |
| 6115 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6116 private: | |
| 6117 bool _success; | |
| 6118 public: | |
| 6119 NoYoungRegionsClosure() : _success(true) { } | |
| 6120 bool doHeapRegion(HeapRegion* r) { | |
| 6121 if (r->is_young()) { | |
| 6122 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6123 r->bottom(), r->end()); | |
| 6124 _success = false; | |
| 6125 } | |
| 6126 return false; | |
| 6127 } | |
| 6128 bool success() { return _success; } | |
| 6129 }; | |
| 6130 | |
|
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|
6131 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
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|
6132 bool ret = _young_list->check_list_empty(check_sample); |
|
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|
6133 |
|
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|
6134 if (check_heap) { |
| 342 | 6135 NoYoungRegionsClosure closure; |
| 6136 heap_region_iterate(&closure); | |
| 6137 ret = ret && closure.success(); | |
| 6138 } | |
| 6139 | |
| 6140 return ret; | |
| 6141 } | |
| 6142 | |
| 4072 | 6143 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6144 private: | |
| 6145 OldRegionSet *_old_set; | |
| 2152 | 6146 |
| 342 | 6147 public: |
| 4072 | 6148 TearDownRegionSetsClosure(OldRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6149 |
| 342 | 6150 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6151 if (r->is_empty()) { |
| 6152 // We ignore empty regions, we'll empty the free list afterwards | |
| 6153 } else if (r->is_young()) { | |
| 6154 // We ignore young regions, we'll empty the young list afterwards | |
| 6155 } else if (r->isHumongous()) { | |
| 6156 // We ignore humongous regions, we're not tearing down the | |
| 6157 // humongous region set | |
| 342 | 6158 } else { |
| 4072 | 6159 // The rest should be old |
| 6160 _old_set->remove(r); | |
| 342 | 6161 } |
| 6162 return false; | |
| 6163 } | |
| 6164 | |
| 4072 | 6165 ~TearDownRegionSetsClosure() { |
| 6166 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6167 } |
| 342 | 6168 }; |
| 6169 | |
| 4072 | 6170 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6171 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6172 | |
| 6173 if (!free_list_only) { | |
| 6174 TearDownRegionSetsClosure cl(&_old_set); | |
| 6175 heap_region_iterate(&cl); | |
| 6176 | |
| 6177 // Need to do this after the heap iteration to be able to | |
| 6178 // recognize the young regions and ignore them during the iteration. | |
| 6179 _young_list->empty_list(); | |
| 6180 } | |
| 6181 _free_list.remove_all(); | |
| 6182 } | |
| 6183 | |
| 6184 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6185 private: | |
| 6186 bool _free_list_only; | |
| 6187 OldRegionSet* _old_set; | |
| 6188 FreeRegionList* _free_list; | |
| 6189 size_t _total_used; | |
| 6190 | |
| 6191 public: | |
| 6192 RebuildRegionSetsClosure(bool free_list_only, | |
| 6193 OldRegionSet* old_set, FreeRegionList* free_list) : | |
| 6194 _free_list_only(free_list_only), | |
| 6195 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 6196 assert(_free_list->is_empty(), "pre-condition"); | |
| 6197 if (!free_list_only) { | |
| 6198 assert(_old_set->is_empty(), "pre-condition"); | |
| 6199 } | |
| 6200 } | |
| 6201 | |
| 6202 bool doHeapRegion(HeapRegion* r) { | |
| 6203 if (r->continuesHumongous()) { | |
| 6204 return false; | |
| 6205 } | |
| 6206 | |
| 6207 if (r->is_empty()) { | |
| 6208 // Add free regions to the free list | |
| 6209 _free_list->add_as_tail(r); | |
| 6210 } else if (!_free_list_only) { | |
| 6211 assert(!r->is_young(), "we should not come across young regions"); | |
| 6212 | |
| 6213 if (r->isHumongous()) { | |
| 6214 // We ignore humongous regions, we left the humongous set unchanged | |
| 6215 } else { | |
| 6216 // The rest should be old, add them to the old set | |
| 6217 _old_set->add(r); | |
| 6218 } | |
| 6219 _total_used += r->used(); | |
| 6220 } | |
| 6221 | |
| 6222 return false; | |
| 6223 } | |
| 6224 | |
| 6225 size_t total_used() { | |
| 6226 return _total_used; | |
| 6227 } | |
| 6228 }; | |
| 6229 | |
| 6230 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6231 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6232 | |
| 6233 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); | |
| 6234 heap_region_iterate(&cl); | |
| 6235 | |
| 6236 if (!free_list_only) { | |
| 6237 _summary_bytes_used = cl.total_used(); | |
| 6238 } | |
| 6239 assert(_summary_bytes_used == recalculate_used(), | |
| 6240 err_msg("inconsistent _summary_bytes_used, " | |
| 6241 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 6242 _summary_bytes_used, recalculate_used())); | |
| 342 | 6243 } |
| 6244 | |
| 6245 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6246 _refine_cte_cl->set_concurrent(concurrent); | |
| 6247 } | |
| 6248 | |
| 6249 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6250 HeapRegion* hr = heap_region_containing(p); | |
| 6251 if (hr == NULL) { | |
|
6725
da91efe96a93
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|
6252 return false; |
| 342 | 6253 } else { |
| 6254 return hr->is_in(p); | |
| 6255 } | |
| 6256 } | |
| 2152 | 6257 |
|
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|
6258 // Methods for the mutator alloc region |
|
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|
6259 |
|
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|
6260 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
|
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|
6261 bool force) { |
|
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|
6262 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
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|
6263 assert(!force || g1_policy()->can_expand_young_list(), |
|
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|
6264 "if force is true we should be able to expand the young list"); |
|
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|
6265 bool young_list_full = g1_policy()->is_young_list_full(); |
|
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|
6266 if (force || !young_list_full) { |
|
2433
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|
6267 HeapRegion* new_alloc_region = new_region(word_size, |
|
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|
6268 false /* do_expand */); |
|
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|
6269 if (new_alloc_region != NULL) { |
|
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|
6270 set_region_short_lived_locked(new_alloc_region); |
|
3778
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|
6271 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
|
2433
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|
6272 return new_alloc_region; |
|
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|
6273 } |
|
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|
6274 } |
|
abdfc822206f
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|
6275 return NULL; |
|
abdfc822206f
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|
6276 } |
|
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|
6277 |
|
abdfc822206f
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|
6278 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
|
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|
6279 size_t allocated_bytes) { |
|
abdfc822206f
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|
6280 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
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|
6281 assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
|
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|
6282 |
|
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|
6283 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
|
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|
6284 _summary_bytes_used += allocated_bytes; |
|
3778
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diff
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|
6285 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
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3979
diff
changeset
|
6286 // We update the eden sizes here, when the region is retired, |
|
8229bd737950
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diff
changeset
|
6287 // instead of when it's allocated, since this is the point that its |
|
8229bd737950
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diff
changeset
|
6288 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
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changeset
|
6289 g1mm()->update_eden_size(); |
|
2433
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|
6290 } |
|
abdfc822206f
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|
6291 |
|
abdfc822206f
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changeset
|
6292 HeapRegion* MutatorAllocRegion::allocate_new_region(size_t word_size, |
|
abdfc822206f
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|
6293 bool force) { |
|
abdfc822206f
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parents:
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diff
changeset
|
6294 return _g1h->new_mutator_alloc_region(word_size, force); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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|
6295 } |
|
abdfc822206f
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changeset
|
6296 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
6297 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
6298 // Don't change the number of workers. Use the value previously set |
|
bca17e38de00
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4090
diff
changeset
|
6299 // in the workgroup. |
| 4711 | 6300 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
|
6301 uint n_workers = workers()->active_workers(); |
| 4711 | 6302 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
6303 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
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|
6304 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
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|
6305 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
6306 assert(false, "Should have been set in prior evacuation pause."); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
6307 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
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|
6308 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
6309 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
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changeset
|
6310 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
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|
6311 } |
|
bca17e38de00
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4090
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|
6312 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6313 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
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|
6314 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
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changeset
|
6315 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
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|
6316 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6317 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6318 // Methods for the GC alloc regions |
|
f44782f04dd4
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3824
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|
6319 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6320 HeapRegion* G1CollectedHeap::new_gc_alloc_region(size_t word_size, |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6321 uint count, |
|
3830
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6322 GCAllocPurpose ap) { |
|
f44782f04dd4
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|
6323 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
|
f44782f04dd4
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|
6324 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6325 if (count < g1_policy()->max_regions(ap)) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6326 HeapRegion* new_alloc_region = new_region(word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
6327 true /* do_expand */); |
|
f44782f04dd4
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|
6328 if (new_alloc_region != NULL) { |
|
f44782f04dd4
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diff
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|
6329 // We really only need to do this for old regions given that we |
|
f44782f04dd4
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diff
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|
6330 // should never scan survivors. But it doesn't hurt to do it |
|
f44782f04dd4
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diff
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|
6331 // for survivors too. |
|
f44782f04dd4
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diff
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|
6332 new_alloc_region->set_saved_mark(); |
|
f44782f04dd4
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|
6333 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
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diff
changeset
|
6334 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6335 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
|
f44782f04dd4
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|
6336 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
6337 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
|
f44782f04dd4
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diff
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|
6338 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
6339 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
6340 new_alloc_region->note_start_of_copying(during_im); |
|
3830
f44782f04dd4
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|
6341 return new_alloc_region; |
|
f44782f04dd4
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diff
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|
6342 } else { |
|
f44782f04dd4
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diff
changeset
|
6343 g1_policy()->note_alloc_region_limit_reached(ap); |
|
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|
6344 } |
|
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changeset
|
6345 } |
|
f44782f04dd4
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|
6346 return NULL; |
|
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changeset
|
6347 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
6348 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
6349 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
|
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6350 size_t allocated_bytes, |
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6351 GCAllocPurpose ap) { |
|
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6352 bool during_im = g1_policy()->during_initial_mark_pause(); |
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6353 alloc_region->note_end_of_copying(during_im); |
|
3830
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6354 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
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6355 if (ap == GCAllocForSurvived) { |
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6356 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6357 } else { |
| 6358 _old_set.add(alloc_region); | |
|
3830
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6359 } |
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6360 _hr_printer.retire(alloc_region); |
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6361 } |
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6362 |
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6363 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
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6364 bool force) { |
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6365 assert(!force, "not supported for GC alloc regions"); |
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6366 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
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6367 } |
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6368 |
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6369 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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6370 size_t allocated_bytes) { |
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6371 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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6372 GCAllocForSurvived); |
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6373 } |
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6374 |
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6375 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
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6376 bool force) { |
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6377 assert(!force, "not supported for GC alloc regions"); |
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6378 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
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6379 } |
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6380 |
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6381 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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6382 size_t allocated_bytes) { |
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6383 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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6384 GCAllocForTenured); |
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6385 } |
|
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6386 // Heap region set verification |
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6387 |
| 2152 | 6388 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6389 private: | |
| 4072 | 6390 FreeRegionList* _free_list; |
| 6391 OldRegionSet* _old_set; | |
| 2152 | 6392 HumongousRegionSet* _humongous_set; |
|
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6393 uint _region_count; |
| 2152 | 6394 |
| 6395 public: | |
| 4072 | 6396 VerifyRegionListsClosure(OldRegionSet* old_set, |
| 6397 HumongousRegionSet* humongous_set, | |
| 2152 | 6398 FreeRegionList* free_list) : |
| 4072 | 6399 _old_set(old_set), _humongous_set(humongous_set), |
| 6400 _free_list(free_list), _region_count(0) { } | |
| 2152 | 6401 |
|
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6402 uint region_count() { return _region_count; } |
| 2152 | 6403 |
| 6404 bool doHeapRegion(HeapRegion* hr) { | |
| 6405 _region_count += 1; | |
| 6406 | |
| 6407 if (hr->continuesHumongous()) { | |
| 6408 return false; | |
| 6409 } | |
| 6410 | |
| 6411 if (hr->is_young()) { | |
| 6412 // TODO | |
| 6413 } else if (hr->startsHumongous()) { | |
| 6414 _humongous_set->verify_next_region(hr); | |
| 6415 } else if (hr->is_empty()) { | |
| 6416 _free_list->verify_next_region(hr); | |
| 4072 | 6417 } else { |
| 6418 _old_set->verify_next_region(hr); | |
| 2152 | 6419 } |
| 6420 return false; | |
| 6421 } | |
| 6422 }; | |
| 6423 | |
|
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6424 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
| 3766 | 6425 HeapWord* bottom) { |
| 6426 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6427 MemRegion mr(bottom, end); | |
| 6428 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6429 // This might return NULL if the allocation fails | |
|
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6430 return new HeapRegion(hrs_index, _bot_shared, mr); |
| 3766 | 6431 } |
| 6432 | |
| 2152 | 6433 void G1CollectedHeap::verify_region_sets() { |
| 6434 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6435 | |
| 6436 // First, check the explicit lists. | |
| 6437 _free_list.verify(); | |
| 6438 { | |
| 6439 // Given that a concurrent operation might be adding regions to | |
| 6440 // the secondary free list we have to take the lock before | |
| 6441 // verifying it. | |
| 6442 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6443 _secondary_free_list.verify(); | |
| 6444 } | |
| 4072 | 6445 _old_set.verify(); |
| 2152 | 6446 _humongous_set.verify(); |
| 6447 | |
| 6448 // If a concurrent region freeing operation is in progress it will | |
| 6449 // be difficult to correctly attributed any free regions we come | |
| 6450 // across to the correct free list given that they might belong to | |
| 6451 // one of several (free_list, secondary_free_list, any local lists, | |
| 6452 // etc.). So, if that's the case we will skip the rest of the | |
| 6453 // verification operation. Alternatively, waiting for the concurrent | |
| 6454 // operation to complete will have a non-trivial effect on the GC's | |
| 6455 // operation (no concurrent operation will last longer than the | |
| 6456 // interval between two calls to verification) and it might hide | |
| 6457 // any issues that we would like to catch during testing. | |
| 6458 if (free_regions_coming()) { | |
| 6459 return; | |
| 6460 } | |
| 6461 | |
| 2361 | 6462 // Make sure we append the secondary_free_list on the free_list so |
| 6463 // that all free regions we will come across can be safely | |
| 6464 // attributed to the free_list. | |
| 6465 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6466 |
| 6467 // Finally, make sure that the region accounting in the lists is | |
| 6468 // consistent with what we see in the heap. | |
| 4072 | 6469 _old_set.verify_start(); |
| 2152 | 6470 _humongous_set.verify_start(); |
| 6471 _free_list.verify_start(); | |
| 6472 | |
| 4072 | 6473 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6474 heap_region_iterate(&cl); |
| 6475 | |
| 4072 | 6476 _old_set.verify_end(); |
| 2152 | 6477 _humongous_set.verify_end(); |
| 6478 _free_list.verify_end(); | |
| 342 | 6479 } |